WO2024182957A1 - 电池单体、电池和用电装置 - Google Patents

电池单体、电池和用电装置 Download PDF

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Publication number
WO2024182957A1
WO2024182957A1 PCT/CN2023/079690 CN2023079690W WO2024182957A1 WO 2024182957 A1 WO2024182957 A1 WO 2024182957A1 CN 2023079690 W CN2023079690 W CN 2023079690W WO 2024182957 A1 WO2024182957 A1 WO 2024182957A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
bracket
active material
pole
material coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/079690
Other languages
English (en)
French (fr)
Inventor
林文法
孔攀
唐鸣浩
张盛武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to JP2025528905A priority Critical patent/JP2025539133A/ja
Priority to PCT/CN2023/079690 priority patent/WO2024182957A1/zh
Priority to CN202380042088.0A priority patent/CN119256421B/zh
Priority to KR1020257016308A priority patent/KR20250092229A/ko
Priority to EP23925683.7A priority patent/EP4597678A4/en
Publication of WO2024182957A1 publication Critical patent/WO2024182957A1/zh
Priority to US19/235,065 priority patent/US20250309475A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/584Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/102Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • H01M50/15Lids or covers characterised by their shape for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/172Arrangements of electric connectors penetrating the casing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/528Fixed electrical connections, i.e. not intended for disconnection
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/538Connection of several leads or tabs of wound or folded electrode stacks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/54Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/584Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593Spacers; Insulating plates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627Filling ports
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular to a battery cell, a battery and an electrical device.
  • the present application provides a battery cell, a battery and an electrical device, wherein the bracket of the battery cell can improve the reliability of the battery cell.
  • the present application provides a battery cell, comprising: a shell, comprising a shell cover and a shell body having an opening, the shell cover covering the opening; a battery cell assembly, comprising an active material coating portion, the active material coating portion being disposed in the shell; a bracket, disposed at an end of the active material coating portion away from the opening and cooperating with the battery cell assembly; wherein the bracket has a main body portion and an extension portion disposed on the periphery of the main body portion, the projection of the main body portion on the shell cover plane is located within the projection of the active material coating portion on the shell cover plane, and the projection of the extension portion on the shell cover plane is located outside the projection of the active material coating portion on the shell cover plane.
  • the bracket is arranged at the end of the active material coating part away from the opening, and the projection of the main body on the shell cover plane is arranged within the projection of the active material coating part on the shell cover plane, and then they are put into the shell together.
  • the bracket In the process of loading the battery cell assembly with the bracket into the shell, the bracket will preferentially contact the shell body, to a certain extent, prevent the end of the shell body close to the opening from directly contacting the active material coating part, and minimize the occurrence of the shell scratching the active material coating part;
  • the projection of the extension part on the shell cover plane is arranged outside the projection of the active material coating part on the shell cover plane, which can protect the active material coating part during the shell entry process, reduce the probability of the active material coating part touching the shell, and further reduce the occurrence of the shell scratching the active material coating part.
  • the bracket to reduce the occurrence of the shell scratching the active material coating part, the possibility of the active material falling off is reduced, to a certain extent, the internal short circuit caused by the overlap of the falling active material and the pole piece of the opposite polarity is prevented, and to a certain extent, the falling active material is prevented from chemically reacting with the shell, thereby causing the shell to be corroded and penetrated, thereby improving the reliability of the battery cell.
  • the extension portion is located on opposite sides of the main body along a preset direction, and the preset direction is parallel to the shell cover plane, which can prevent the opposite side edges of the active material coating portion from touching the shell, thereby preventing the shell from scratching the opposite side edges of the active material coating portion.
  • the extension portion is an annular structure surrounding the main body.
  • the bracket can protect the outer edge of one end of the active material coating portion, preventing the outer edge of the active material coating portion facing the bracket from touching the shell, avoiding the shell from scratching the active material coating portion, and further improving the reliability of the battery cell.
  • the edge of the surface of the extension portion facing away from the shell cover has a guide surface
  • the guide surface includes an arc surface and/or an inclined surface.
  • the guide surface can play a guiding role, so that the bracket can be smoothly installed in the shell body, thereby improving assembly efficiency.
  • the bracket is snapped or bonded to the battery cell assembly to connect the bracket and the battery cell assembly together, which to a certain extent prevents the bracket from falling off before entering the shell, thereby improving the product quality rate of the battery monomer; the bracket and the battery cell assembly can be entered into the shell together, which can not only protect the battery cell assembly and ensure that the battery cell assembly can be smoothly and safely entered into the shell, but also play an insulating role.
  • a limiting convex portion is provided on one side of the extension portion close to the shell cover, and the bracket is clamped with the active material coating portion through the limiting convex portion.
  • the limiting convex portion can constrain one end of the active material coating portion, reduce the probability of the outer layer of the active material coating portion becoming fluffy, and also protect one end of the active material coating portion, reducing the problem of one end of the active material coating portion touching the shell, thereby reducing the phenomenon of the shell scratching the active material coating portion; the bracket is clamped with the active material coating portion through the limiting convex portion.
  • the protruding portion is engaged with the active material coating portion, which to a certain extent prevents the bracket from falling off before entering the shell, thereby improving the product quality rate of the battery cell.
  • the surface of the side of the limiting protrusion facing the active material coating portion includes: a first surface, the first surface is in contact with the side wall of the active material coating portion; and/or a second surface, the distance between the second surface and the active material coating portion gradually increases along the direction of the bracket pointing to the opening.
  • the first surface and the second surface can constrain the battery cell assembly to reduce the probability of the outer layer of the battery cell assembly becoming fluffy, and also protect the side wall of the battery cell assembly to reduce the problem of one end of the battery cell assembly touching the shell; the second surface can play a guiding role, facilitate assembly, and improve the assembly efficiency of the battery cell assembly and the bracket.
  • the battery cell further includes: an insulating member, the insulating member wraps the active material coating portion and is connected to the extension portion.
  • the insulating member is located between the active material coating portion and the shell, can play an insulating role, and protect the battery cell assembly, prevent the battery cell assembly from overlapping with the shell of the battery cell, and effectively reduce the phenomenon of corrosion of the battery cell assembly due to naked leakage; the insulating member is connected to the extension portion to facilitate fixing the insulating member.
  • the insulating member is connected to the peripheral wall surface of the extension portion, which can improve the connection reliability between the insulating member and the peripheral wall of the bracket and reduce the risk of the insulating member falling off.
  • the peripheral wall surface has a first step surface and a second step surface, the second step surface is located on the side of the first step surface close to the shell cover, the second step surface is closer to the active material coating portion than the first step surface, and the insulating member is connected to the second step surface.
  • the peripheral wall surface is set to include the first step surface and the second step surface, which can provide installation space for the insulating member, and the insulating member is connected to the second step surface, which can reduce the risk of the connection structure between the insulating member and the second step surface falling off due to scratching the shell, and further improve the connection reliability between the insulating member and the bracket.
  • the first step surface is further away from the active material coating portion than the outer side surface of the insulating member.
  • the first step surface can protect the edge of the insulating member and the edge of the active material coating portion, reduce the occurrence of the edge of the insulating member and the edge of the active material coating portion scraping against the inner wall of the shell, and protect the connection position between the insulating member and the second step surface, reduce the risk of the connection structure between the insulating member and the second step surface falling off due to scraping against the shell, and further improve the connection reliability between the insulating member and the bracket.
  • the battery cell further includes: an insulating member, the insulating member wraps the active material coating portion and is connected to the surface of the main body away from the shell cover.
  • the shell will not scratch the edge of the insulating member, nor will it scratch the connection position between the insulating member and the main body, and the connection position between the two is not easy to be pulled apart during the shell insertion process, which can reduce the movement and slippage of the insulating member during the shell insertion process of the battery cell assembly, improve the connection reliability between the insulating member and the bracket, reduce the risk of the insulating member falling off, and further reduce the risk of the battery cell assembly being corroded by the shell due to naked leakage, reduce the risk of the battery cell assembly itself failing, and reduce the risk of leakage, thereby improving the reliability and stability of the battery cell; in addition, by connecting at least a part of the insulating member to the wall of the main body away from the battery cell
  • the insulating part is pressed between the wall of the shell opposite to the opening and the main body, which can further reduce the risk of the insulating part falling off, reduce the risk of the battery cell assembly failing due to leakage, and at the same time reduce the risk of corrosion of the shell, thereby improving the reliability and stability of the battery cell.
  • a pole is provided on the shell; the battery cell assembly also includes a conductive part, which is connected to a side of the active material coating part close to the main body, and the main body has a via hole, and the conductive part passes through the via hole to connect with the pole.
  • the bracket can play the role of collecting and accommodating the conductive part, which facilitates the connection between the conductive part and the pole, and can improve the assembly reliability and convenience of the battery cell; on the other hand, the bracket collects the conductive part, which can eliminate the structure of the original plastic parts in the battery cell, and can achieve insulation between the entire active material coating part and the shell through the cooperation of the bracket and the insulating part, which can effectively reduce the manufacturing and production costs.
  • the bracket is an integrated structure; or, the bracket is a split structure and includes a first bracket and a second bracket formed separately, and a through hole is defined between the first bracket and the second bracket.
  • the bracket with an integrated structure is easy to process, has good reliability, and is easy to assemble with the housing component, improving assembly efficiency and matching stability.
  • the through hole is defined by the cooperation of the first bracket and the second bracket, and when the bracket is assembled with the battery cell assembly, there is no need to remove the conductive part from the through hole.
  • the first bracket and the second bracket can be spliced together at the position of the conductive part to clamp the conductive part, so that the via hole surrounds the conductive part, which is convenient for assembling the bracket and the battery cell assembly and improves the assembly efficiency.
  • a receiving groove connected to the via hole is provided on one side of the main body away from the active material coating part, and the receiving groove is used to accommodate at least part of the pole.
  • a positioning portion is provided on one side of the main body away from the active material coating portion, and the positioning portion is arranged around the via hole and extends toward the pole.
  • the positioning portion can restrain, gather, and support the conductive portion, making it easier to connect the conductive portion to the pole, thereby improving the assembly efficiency and quality of the battery cell.
  • a receiving portion is provided on the pole, at least part of the conductive portion is received in the receiving portion, at least part of the positioning portion extends into the receiving portion, and is used to guide the conductive portion to extend into the receiving portion.
  • the conductive portion can be guided to connect with the pole, which can improve the connection reliability and ensure the assembly efficiency and quality; on the other hand, the conductive portion can be received in the receiving portion, which improves the assembly efficiency of the conductive portion, saves the space occupied by the conductive portion, and makes full use of the space of the battery cell, so that the matching between the bracket and the pole, and between the bracket and the conductive portion are tighter and more reliable, making the structure of the battery cell more compact, which is more conducive to the improvement of the energy density of the battery cell.
  • a guide groove connected to the via hole is formed on one side of the main body facing the active material coating part, and the guide groove accommodates at least part of the conductive part.
  • the cross-sectional area of the guide groove gradually increases along the direction of the main body approaching the active material coating part.
  • the guide groove can accommodate the conductive part and avoid the conductive part to avoid crushing the conductive part, and can also reduce the probability of the conductive part becoming fluffy and folded, thereby reducing redundancy.
  • the bracket has at least one first liquid injection guide groove, the first liquid injection guide groove is located on the side of the bracket facing the active material coating portion, and at least one first liquid injection guide groove is connected to the guide groove.
  • the electrolyte can flow along the first liquid injection guide groove toward the guide groove, so that the electrolyte can flow to a predetermined position, increasing the contact area between the electrolyte and the active material coating portion.
  • the provision of the first liquid injection guide groove increases the contact area between the electrolyte and the active material coating portion, which can reduce the problem of poor wetting of the active material coating portion.
  • the support has a first liquid injection guide groove, which is located on the side of the support facing the active material coating portion; and/or, the support has a second liquid injection guide groove, which is located on the side of the support facing away from the active material coating portion.
  • the electrolyte can flow along the first liquid injection guide groove and/or the second liquid injection guide groove, providing an infiltration path for the electrolyte, and can increase the fluidity of the electrolyte, increase the injection speed, and reduce the formation static time.
  • the side of the bracket facing the battery cell assembly has a clearance portion for avoiding the outer edge of the battery cell assembly facing the bracket.
  • the battery cell assembly further includes a conductive part, which is connected to a side of the active material coating part close to the main body; a pole is provided on the shell, and a receiving part is provided on the pole, and at least part of the conductive part is received in the receiving part and connected to the pole.
  • the space occupied by the battery cell itself can be reduced, so that a battery of the same volume can accommodate more battery cells, and the volume energy density of the battery can be improved; in addition, by receiving at least part of the conductive part in the receiving part to occupy the space in the pole, the redundancy of the conductive part in the shell can be reduced to at least a certain extent, the probability of short circuit between the conductive part and the active material coating part can be reduced, the probability of short circuit of the battery cell can be reduced, and the working reliability and stability of the battery cell and the battery can be improved.
  • the receiving portion has a first receiving groove
  • the surface of the pole facing the active material coating portion is the inner end face of the pole
  • the notch of the first receiving groove is formed on the inner end face of the pole
  • at least part of the conductive portion is received in the first receiving groove
  • the first receiving groove is provided on the pole to reduce the weight of the pole to a certain extent, so as to improve the weight energy density of the battery cell and the battery; on the other hand, because the notch of the first receiving groove is formed on the inner end face of the pole, and the inner end face of the pole is the surface of the pole close to the active material coating portion, the first receiving groove can The first receiving groove is open toward the active material coating part, so that the conductive part can be easily inserted into the first receiving groove, thereby improving assembly efficiency. Moreover, the first receiving groove of this form is easy to process, thereby improving production efficiency.
  • the receiving portion has a second receiving groove
  • the surface of the pole away from the active material coating portion is the outer end face of the pole
  • the notch of the second receiving groove is formed on the outer end face of the pole
  • the second receiving groove is connected to the interior of the shell through a perforation
  • the conductive portion is inserted through the perforation and at least partially received in the second receiving groove.
  • the pole is provided with a second receiving groove, which can reduce the weight of the pole to a certain extent, so as to improve the weight energy density of the battery cell and the battery;
  • the second receiving groove can be opened in the direction away from the active material coating portion, so that when at least part of the conductive portion is received in the second receiving groove, the conductive portion can be easily stored and sorted through the notch of the second receiving groove, and the electrical connection operation between the conductive portion and the pole can be easily realized through the notch of the second receiving groove, thereby reducing the difficulty of producing the battery cell and improving the production efficiency of the battery cell.
  • the number of openings is two, each opening is provided with a shell cover, and the bracket is provided at the end of the active material coating portion away from any opening.
  • two openings are provided on the shell body, and a bracket is provided at the end of the battery cell assembly away from any opening. The battery cell assembly with two brackets and insulating parts can be loaded into the shell body from any opening, and the appropriate shell entry direction can be selected as needed.
  • a part of the insulating part can be pressed between the wall of the shell body opposite to one of the openings and the corresponding bracket, and the other part of the insulating part can be pressed between the wall of the shell body opposite to the other opening and the corresponding bracket, further reducing the risk of the insulating part falling off, reducing the risk of the battery cell assembly failing due to leakage, and at the same time reducing the risk of the shell being corroded, thereby improving the reliability and stability of the battery cell.
  • At least one pole is disposed on the shell wall on one side of the shell adjacent to the bracket.
  • the battery cell assembly with the bracket and the insulating member enters the shell through the opening, and the conductive part directly faces the pole, so that the conductive part can be connected to the pole relatively easily, thereby improving the assembly efficiency of the battery cell.
  • the present application provides a battery, which includes the battery cell in the above embodiment.
  • the bracket can not only constrain the active material coating portion, but also the extension portion can protect the active material coating portion, reduce the probability of the active material coating portion touching the shell, and minimize the phenomenon of the shell scratching the active material coating portion, thereby improving the reliability of the battery, and the installation steps are simple, which is conducive to improving production efficiency.
  • the present application provides an electric device, which includes the battery in the above embodiment.
  • the electric device since the electric device is provided with the above battery, the working reliability and stability of the battery can be improved, and thus the working reliability and stability of the electric device can be improved.
  • FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.
  • FIG2 is an exploded view of a battery structure provided in some embodiments of the present application.
  • FIG3 is a battery provided by some embodiments of the present application.
  • FIG4 is a structural exploded view of a battery cell in some embodiments of the present application.
  • FIG5 is a cross-sectional view of a battery cell according to some embodiments of the present application.
  • FIG6 is an enlarged view of the battery cell at position A shown in FIG5 ;
  • FIG7 is a front view of a battery cell according to some embodiments of the present application.
  • FIG8 is a front view of a battery cell according to some other embodiments of the present application.
  • FIG9 is a partial structural cross-sectional view of a battery cell according to some embodiments of the present application.
  • FIG10 is a partial structural cross-sectional view of a battery cell according to some other embodiments of the present application.
  • FIG11 is a partial structural cross-sectional view of a battery cell according to some other embodiments of the present application.
  • FIG12 is a partial structural cross-sectional view of a battery cell according to some other embodiments of the present application.
  • FIG13 is a cross-sectional view of the structure of a battery cell assembly, a bracket, and an insulating member after being assembled in some embodiments of the present application;
  • FIG15 is a cross-sectional view of the structure of the battery cell assembly, the bracket and the insulating member after being assembled in some other embodiments of the present application;
  • FIG17 is a schematic structural diagram of a bracket of a battery cell in some other embodiments of the present application.
  • FIG18 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG19 is a cross-sectional view of a structure of a bracket of a battery cell according to some embodiments of the present application.
  • FIG. 20 is a top view of a bracket of a battery cell according to some embodiments of the present application.
  • FIG21 is a top view of a bracket of a battery cell according to some other embodiments of the present application.
  • FIG22 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG23 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG24 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG25 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG26 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG27 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG28 is an exploded view of the structure of the battery cell shown in FIG27;
  • FIG29 is an exploded view of the structure of the first cover plate shown in FIG28;
  • FIG30 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application.
  • FIG31 is an exploded view of the structure of the battery cell shown in FIG30 ;
  • FIG32 is an assembly diagram of a battery cell according to some embodiments of the present application.
  • FIG. 33 is an assembly diagram of battery cells according to other embodiments of the present application.
  • FIG. 1 Electric device 1000, battery 100, controller 200, motor 300,
  • the first direction is Z
  • the second direction is X
  • the third direction is Y
  • the axial direction of the pole is R.
  • Battery cell 10 box 20, first box 201, second box 202, Shell 11, shell body 111, opening 1110, mounting wall 1112, shell cover 112, first shell cover 1121, second shell cover 1122, mounting hole 113, Pole 12, accommodating portion 121, first accommodating groove 12110, first end wall 12111, first sinking groove 12112, first side wall 12113, second accommodating groove 12120, second end wall 12121, second sinking groove 12122, second side wall 12123, first groove section 12124, second groove section 12125, guiding inclined surface 12126, third step surface 12127, through hole 12130, pole inner end surface 122, pole outer end surface 123, first groove 126, spacer 127, First cover plate 13; first conductive member 131; second groove 1311; second conductive member 132; stress release groove 133; A second cover plate 14; Cell
  • the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this.
  • Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in the present application may be a battery module or a battery pack.
  • a battery module generally includes a plurality of battery cells.
  • a battery pack generally includes a housing and one or more battery cells disposed in the housing, or a battery pack includes a housing and one or more battery modules disposed in the housing, and the housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • a battery cell may generally include a shell, an electrode assembly and an electrolyte, wherein the shell is used to contain the electrode assembly and the electrolyte, and the shell is provided with at least one positive electrode column and at least one negative electrode column.
  • the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator.
  • the positive electrode sheet generally includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is directly or indirectly coated on the positive electrode current collector.
  • the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer.
  • the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet. Multiple positive electrode tab sheets are stacked together and electrically connected to the positive electrode column.
  • the negative electrode sheet generally includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is directly or indirectly coated on the negative electrode current collector, the negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab sheet, and a plurality of negative electrode tab sheets are stacked together and electrically connected to the negative electrode column.
  • the material of the separator is not limited, for example, it can be polypropylene or polyethylene.
  • the material of the positive electrode current collector can be aluminum
  • the material of the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
  • the material of the negative electrode current collector can be copper
  • the material of the negative electrode active material layer can be carbon or silicon, etc.
  • Li+ is embedded and de-embedded back and forth between the two electrodes: when charging, Li+ is de-embedded from the positive electrode, embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.
  • an active material layer is coated on the current collector and then cut to obtain a pole piece consisting of a current collector coated with an active material layer (referred to as an active material coating part) and a current collector not coated with an active material layer (referred to as a pole tab piece), and then the positive and negative pole pieces and the separator are stacked or wound in sequence to obtain an electrode assembly, in which multiple pole tab pieces are stacked to form a pole tab part, and the pole tab part itself forms a conductive part, or the pole tab part is connected to a transfer sheet to form a conductive part, and the active material coating part and the conductive part form a battery cell assembly.
  • the battery cell shell cover is provided with a pole post, and when the battery cell is assembled, the conductive part of the battery cell assembly is usually welded to the pole post on the shell cover, and then they are inserted into the shell from the opening of the shell body.
  • the inventors discovered that in the process of installing the battery cell assembly into the shell through the opening, the insulating parts and the battery cell assembly (especially the edges of the battery cell assembly) are likely to interfere with or scratch the shell, causing damage to the insulating parts and the pole pieces of the battery cell assembly, thereby causing the active material to fall off, which may cause the active material to overlap with the pole pieces of opposite polarity and cause an internal short circuit; and the insulating parts are likely to wrinkle during the friction with the shell, causing contact between the battery cell assembly and the inner wall surface of the shell, causing corrosion of the battery cell assembly, affecting the reliability of the battery cell.
  • the present application sets the bracket at the end of the active material coating part away from the opening, and the projection of the main body on the shell cover plane is set within the projection of the active material coating part on the shell cover plane, and then puts into the shell together.
  • the bracket In the process of loading the battery cell assembly with the bracket into the shell, the bracket will preferentially contact the shell body, to a certain extent, prevent the end of the shell body close to the opening from directly contacting the active material coating part, and minimize the occurrence of the shell scratching the active material coating part; the projection of the extension part on the shell cover plane is set outside the projection of the active material coating part on the shell cover plane, which can protect the active material coating part during the shell entry process, reduce the probability of the active material coating part touching the shell, and further reduce the occurrence of the shell scratching the active material coating part.
  • the bracket By setting the bracket to reduce the occurrence of the shell scratching the active material coating part, the possibility of the active material falling off is reduced, and the internal short circuit caused by the overlap of the fallen active material and the pole piece of the opposite polarity is prevented to a certain extent, and the chemical reaction between the fallen active material and the shell is prevented to a certain extent, which leads to the corrosion and penetration of the shell, thereby improving the reliability of the battery cell.
  • the battery cell disclosed in the embodiment of the present application can be used in an electrical device that uses a battery as a power source or various energy storage systems that use a battery as an energy storage element.
  • the electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like
  • the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.
  • FIG. 1 is a schematic diagram of the structure of a vehicle in which an electric device 1000 is provided in some embodiments of the present application.
  • the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the vehicle is provided with a battery 100, which can be provided at the bottom or head of the vehicle. or tail.
  • the battery 100 can be used to power the vehicle, for example, the battery 100 can be used as an operating power source for the vehicle.
  • the vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle.
  • the battery 100 can not only be used as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
  • FIG. 2 is an exploded view of the structure of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a housing 20 and a plurality of battery cells 10, and the battery cells 10 are contained in the housing 20.
  • the housing 20 is used to provide a storage space for the battery cells 10, and the housing 20 can adopt a variety of structures.
  • the housing 20 may include a first housing 201 and a second housing 202, and the first housing 201 and the second housing 202 cover each other, and the first housing 201 and the second housing 202 jointly define a storage space for accommodating the battery cells 10.
  • the second box 202 may be a hollow structure with one end open, the first box 201 may be a plate-like structure, and the first box 201 covers the open side of the second box 202, so that the first box 201 and the second box 202 define an assembly space together; or, the first box 201 and the second box 202 may both be hollow structures with one side open (for example, as shown in FIG. 2 ), and the open side of the first box 201 covers the open side of the second box 202.
  • the box 20 formed by the first box 201 and the second box 202 may be in various shapes, such as a cylinder, a cuboid, etc.
  • multiple battery cells 10 can be connected in series, in parallel, or in a hybrid connection.
  • a hybrid connection means that multiple battery cells 10 are connected in series and in parallel. Multiple battery cells 10 can be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by multiple battery cells 10 is accommodated in the box 20; or, the battery 100 can also be a battery module formed by multiple battery cells 10 connected in series, in parallel, or in a hybrid connection, and then multiple battery modules are connected in series, in parallel, or in a hybrid connection to form a whole, and accommodated in the box 20.
  • the battery 100 may also include other structures, for example, the battery 100 may also include a converging component for realizing electrical connection between multiple battery cells 10.
  • FIG. 3 is a schematic diagram of a battery cell 10 provided in some embodiments of the present application.
  • the battery cell 10 is a rectangular parallelepiped, and the height direction of the battery cell 10 is the first direction Z, the length direction of the battery cell 10 is the second direction X, and the thickness direction of the battery cell 10 is the third direction Y.
  • the first direction Z, the second direction X, and the third direction Y are perpendicular to each other.
  • the battery cell 10 can also be a cylinder, a flat body, or other shapes, etc., which is not limited in this embodiment.
  • Figure 4 is a structural exploded view of a battery cell in some embodiments of the present application.
  • Figure 5 is a structural cross-sectional view of a battery cell in some embodiments of the present application.
  • the battery cell 10 includes a housing 11, a cell assembly 2, a bracket 3, and an insulating member 4.
  • the shape of the shell 11 is adjusted with the type of the battery cell 10, and the type of the battery cell 10 in the embodiment of the present application is not limited.
  • the shell 11 is square
  • the shell 11 is cylindrical
  • the embodiments of the present application are all described by taking the shell 11 as a square.
  • a pole 12 is provided on the shell 11, and the pole 12 is used to be electrically connected to the battery cell assembly 2 to ensure the normal charging and discharging operation of the battery cell 10.
  • the number of poles is at least two, specifically at least one positive pole and at least one negative pole.
  • the shell 11 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value.
  • the pressure relief mechanism can release pressure when the internal pressure or temperature of the battery cell 10 is too high to prevent thermal runaway from being transmitted to other battery cells 10 .
  • the housing 11 specifically includes a housing body 111 and a housing cover 112 .
  • the shell body 111 is a semi-enclosed structure with an opening 1110 at one end, or a ring structure with openings 1110 at both ends.
  • the shell body 111 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc.
  • the shape of the shell body 111 can be determined according to the specific shape and size of the battery cell assembly 2.
  • the material of the shell body 111 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.
  • the shell body 111 has an opening 1110, and the opening 1110 can be one or more.
  • the shell cover 112 refers to a component that covers the opening 1110 of the shell body 111 to isolate the internal environment of the battery cell 10 from the external environment.
  • the number of shell covers 112 is consistent with the number of openings 1110.
  • the number of shell covers 112 is also one, and it is covered at the opening 1110 to close the opening 1110.
  • the number of shell covers 112 is two, and they are respectively covered at the two openings 1110 to close the corresponding openings 1110.
  • the shell cover 112 and the shell body 111 can form a common connection surface before other components are put into the shell.
  • the shell cover 112 When it is necessary to encapsulate the interior of the shell body 111, the shell cover 112 is covered with the shell body 111.
  • the shape of the shell cover 112 can be adapted to the shape of the shell body 111 to match the shell body 111.
  • the shell cover 112 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the shell cover 112 is not easily deformed when squeezed and collided, so that the battery cell 10 can have a higher structural strength and the safety performance can also be improved.
  • Functional components such as the pole 12 can be provided on the shell cover 112.
  • the shell cover 112 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.
  • the shell 11 is provided with a pole 12, and the number of poles 12 is multiple.
  • the multiple poles 12 can be all arranged on the shell body 111, or all arranged on the shell cover 112, or part of them can be arranged on the shell body 111, and the other part can be arranged on the shell cover 112.
  • the following embodiments of the present application are all based on the shell body 111 being square, the number of openings 1110 of the shell body 111 being one, and the number of poles 12 being two, namely a positive pole and a negative pole, and the two poles 12 are both arranged on the wall of the shell body 111 opposite to the opening 1110 for explanation.
  • the shape of the shell body 111, the number of openings 1110 and the shell cover 112, the number of poles 12, and the position of the poles 12 can all be adjusted according to needs, and the embodiments of the present application are not limited thereto.
  • the battery cell assembly 2 includes an active material coating portion 21 and a conductive portion 22.
  • the active material coating portion 21 is disposed in the housing 11.
  • the active material coating portion 21 is the portion of the battery cell assembly 2 coated with active material, which can assist in the deintercalation of metal ions during the charging and discharging process of the battery cell 10.
  • the conductive portion 22 is a metal structure electrically connecting the active material coating portion 21 and the pole 12, which is not coated with active material.
  • the pole 12 can be electrically connected to the active material coating portion 21 through the conductive portion 22, so that the charging and discharging operation of the battery cell 10 can be performed.
  • the conductive portion 22 can be formed by the pole tab itself, or it can be formed by connecting the pole tab with the adapter.
  • the active material coating part 21 is divided into a positive electrode active material coating part and a negative electrode active material coating part.
  • the positive electrode active material coating part includes a portion where the positive electrode current collector is coated with a positive electrode active material layer
  • the negative electrode active material coating part includes a portion where the negative electrode current collector is coated with a negative electrode active material layer.
  • the conductive part 22 is divided into a positive electrode conductive part and a negative electrode conductive part.
  • the positive electrode conductive part electrically connects the positive electrode active material coating part and the positive electrode pole
  • the negative electrode conductive part electrically connects the negative electrode active material coating part and the negative electrode pole.
  • the bracket 3 is arranged at one end of the active material coating part 21 away from the opening 1110, and the bracket 3 cooperates with the battery cell assembly 2.
  • the bracket 3 first enters the shell body 111 from the opening 1110 of the shell body 111, and then the active material coating part 21 enters the shell body 111.
  • the bracket 3 is located at the wall of the shell body 111 opposite to its opening 1110 and the end of the active material coating part 21 away from the opening 1110.
  • the two openings 1110 can be a first opening and a second opening that are respectively arranged opposite to each other.
  • the bracket 3 first enters the shell body 111 from the first opening of the shell body 111 and moves toward the second opening. Then the active material coating portion 21 enters the shell body 111. After the battery cell assembly 2 is installed in place in the shell body 111, the bracket 3 is located at the second opening.
  • the insulating member 4 wraps the active material coating portion 21 , and the insulating member 4 can improve the insulation reliability between the active material coating portion 21 and the shell 11 , reduce or prevent the active material coating portion 21 from contacting the shell 11 and causing the shell 11 to be corroded, reduce the leakage of electrolyte caused by the corrosion of the shell 11 , and improve the reliability of the battery cell 10 .
  • the bracket 3 has a main body 36 and an extension 37.
  • the extension 37 is arranged around the main body 36.
  • the projection of the main body 36 on the plane of the shell cover 112 is located inside the projection of the active material coating part 21 on the plane of the shell cover 112.
  • the projection of the extension 37 on the plane of the shell cover 112 is located outside the projection of the active material coating part 21 on the plane of the shell cover 112. In other words, along the direction perpendicular to the shell cover 112, the projection of the bracket 3 on the plane of the shell cover 112 at least partially exceeds the projection of the active material coating part 21 on the plane of the shell cover 112.
  • the support 3 may be a plate-like structure, and the support 3 may be disposed on the conductive portion of the active material coating portion 21.
  • an avoidance structure (such as an avoidance groove, or the via 311 described below, etc.) for avoiding the conductive part 22 can be provided on the bracket 3.
  • the bracket 3 can also be provided on the side of the non-conductive part 22 of the active material coating part 21, so that the bracket 3 does not need to be provided with an avoidance structure for avoiding the conductive part 22.
  • the bracket 3 When the bracket 3 is arranged on the side of the active material coating part 21 with the conductive part 22, the bracket 3 can be arranged opposite to the pole 12, that is, the bracket 3 and the pole 12 are located on the same side of the active material coating part 21, and the bracket 3 can be arranged between the pole 12 and the active material coating part 21.
  • the bracket 3 When the bracket 3 is arranged on the side of the active material coating part 21 without the conductive part 22, the bracket 3 and the pole 12 are not arranged opposite to each other.
  • the bracket 3 and the pole 12 are located on two adjacent sides of the active material coating part 21; for another example, the bracket 3 and the pole 12 are located on two opposite sides of the active material coating part 21.
  • the bracket 3 in the embodiments of the present application can be added to the original structure of the battery cell in the prior art without changing the remaining structures of the battery cell in the prior art (such as the top cover, upper plastic body, lower plastic body, etc.); or an independent bracket 3 can be used to replace the lower plastic part embedded under the top cover of the battery cell in the prior art.
  • the bracket 3 is arranged at the end of the active material coating part 21 away from the opening 1110, and the projection of the main body 36 on the plane of the shell cover 112 is arranged within the projection of the active material coating part 21 on the plane of the shell cover 112. Then, they are put into the shell together.
  • the bracket 3 will preferentially contact the shell body 111, to a certain extent, prevent the end of the shell body 111 close to the opening 1110 from directly contacting the active material coating part 21, thereby minimizing the occurrence of the shell 11 scratching the active material coating part 21;
  • the projection of the extension part 37 on the plane of the shell cover 112 is arranged outside the projection of the active material coating part 21 on the plane of the shell cover 112, so as to protect the active material coating part 21 during the shell insertion process, reduce the probability of the active material coating part 21 touching the shell 11, and further reduce the occurrence of the shell 11 scratching the active material coating part 21.
  • the bracket 3 the occurrence of the shell 11 scratching the active material coating portion 21 is reduced, so as to reduce the possibility of the active material falling off, and to a certain extent prevent the internal short circuit caused by the overlapping of the fallen active material and the pole piece of the opposite polarity, and to a certain extent prevent the fallen active material from chemically reacting with the shell 11, thereby causing the shell 11 to be corroded and penetrated, thereby improving the reliability of the battery cell 10.
  • the extension portion 37 is located on two opposite sides of the main body 36 along a preset direction, and the preset direction is parallel to the plane of the shell cover 112.
  • the cross-sectional shape of the battery cell 10 can be a rectangle
  • the height direction of the battery cell 10 is the first direction Z
  • the length direction of the battery cell 10 is the second direction X
  • the shell cover 112 is arranged at one end of the height direction of the housing 11
  • the extension portion 37 is located on two opposite sides of the main body 36 along the second direction.
  • the cross-sectional shape of the battery cell 10 is not limited to a rectangle, and can also be a circle, etc., which is not limited here.
  • the extension part 37 is arranged on two opposite sides of the main body part 36 along a preset direction, which can prevent the opposite side edges of the active material coating part 21 from touching the shell 11 and avoid the shell 11 from scratching the opposite side edges of the active material coating part 21.
  • the extension portion 37 is an annular structure surrounding the main body 36. That is to say, the projection edge of the bracket 3 on the plane of the shell cover 112 exceeds the projection of the active material coating portion 21 on the plane of the shell cover 112. In this way, the bracket 3 can protect the outer edge of one end of the active material coating portion 21, prevent the outer edge of the active material coating portion 21 facing the bracket 3 from touching the shell 11, and avoid the shell 11 scratching the active material coating portion 21, thereby further improving the reliability of the battery cell 10.
  • FIG. 5 is an enlarged view of the battery cell 10 shown in FIG. 5 at A.
  • the edge of the bracket 3 facing away from the shell cover 112 has a guide surface 35, that is, the peripheral portion of the side surface of the bracket 3 facing away from the shell cover 112.
  • the edge of the bracket 3 facing away from the shell cover 112 at least includes a connection position between the side of the extension portion 37 facing away from the main body portion 36 and the side facing away from the shell cover 112.
  • the guide surface 35 may include an inclined surface. Specifically, a chamfer may be provided on one side edge of the bracket 3 facing away from the battery cell assembly 2.
  • the "chamfer” here refers to processing the corners of the bracket 3 into a certain inclined surface through cutting and other processes, so as to facilitate the bracket 3 to be installed in the shell 11.
  • the guide surface 35 may include an arc surface.
  • the arc surface may also play an automatic guiding role in the process of installing the bracket 3 into the shell 11.
  • the guide surface 35 may include an arc surface and an inclined surface.
  • the guide surface 35 may also be other special-shaped surfaces, which are not limited here.
  • the guide surface 35 can play a guiding role, so that the bracket 3 can be smoothly installed into the housing 111 , thereby improving assembly efficiency.
  • the bracket 3 is clamped or bonded to the battery cell assembly 2 .
  • a mounting groove can be provided on the bracket 3, and the end of the active material coating portion 21 away from the opening 1110 is fitted into the mounting groove, so as to achieve the purpose of clamping the end of the active material coating portion 21 away from the opening 1110 with the bracket 3, and the connection structure is simple and easy to operate.
  • the clamping method of the bracket 3 and the battery cell assembly 2 is not limited to the above structure.
  • a connecting glue can be provided between the end of the active material coating portion 21 away from the opening 1110 and the bracket 3, and a connecting glue can also be provided between the side wall of the active material coating portion 21 and the bracket 3, so as to achieve the purpose of bonding the active material coating portion 21 away from the opening 1110 with the bracket 3.
  • the setting position of the connecting glue is not limited to the above position.
  • connection method between the bracket 3 and the battery cell assembly 2 is not limited to the above structure, and can be selected according to actual conditions. Connecting the bracket 3 and the battery cell assembly 2 together can prevent the bracket 3 from falling off before entering the shell to a certain extent, thereby improving the product quality rate of the battery cell 10.
  • the bracket 3 and the battery cell assembly 2 are entered into the shell together, which can not only protect the battery cell assembly 2 and ensure that the battery cell assembly 2 can be smoothly and safely entered into the shell, but also play an insulating role.
  • Figure 7 is a front view of a battery cell 10 in some embodiments of the present application.
  • Figure 8 is a front view of a battery cell 10 in other embodiments of the present application.
  • a limiting protrusion 35 is provided on one side of the bracket 3, and the limiting protrusion 35 is engaged with the active material coating portion 21.
  • the limiting protrusion 35 can be arranged on the extension portion 37, and the limiting protrusion 35 can be arranged on the side of the extension portion 37 close to the shell cover 112, that is, the limiting protrusion 35 is formed by the surface of the extension portion 37 close to the shell cover 112 protruding toward the shell cover 112; the limiting protrusion 35 can also be arranged on the side of the extension portion 37 away from the main body portion 36, that is, one end of the limiting protrusion 35 is connected to the side of the extension portion 37 away from the main body portion 36, and the other end of the limiting protrusion 35 extends in the direction close to the shell cover 112, and exceeds the end surface of the main body portion 36 close to the shell cover 112.
  • the limiting protrusion 35 can be arranged on the main body 36, and the limiting protrusion 35 can be arranged on a side of the main body 36 close to the shell cover 112, that is, the limiting protrusion 35 is formed by the surface of the main body 36 close to the shell cover 112 protruding toward the shell cover 112.
  • the active material coating portion 21 can be defined as having a first end 201 and a second end 202 that are relatively arranged, and the limiting protrusion 38 is stopped at the outer side of the side wall of the active material coating portion 21 close to its first end 201.
  • the first end 201 of the active material coating portion 21 with the bracket 3 first enters the shell 11.
  • the first end 201 of the active material coating portion 21 gradually moves away from the opening 1110 in the shell 11.
  • the limiting protrusion 38 is located between the side wall of the active material coating portion 21 and the shell 11.
  • the bracket 3 is located between the wall of the shell 11 opposite to its opening 1110 and the first end 201 of the active material coating portion 21.
  • the limiting convex portion 38 can constrain one end of the active material coating portion 21, reduce the probability of the outer layer of the active material coating portion 21 becoming fluffy, and also protect one end of the active material coating portion 21, reduce the problem of one end of the active material coating portion 21 touching the shell 11, thereby reducing the occurrence of the shell 11 scratching the active material coating portion 21.
  • the bracket 3 is clamped with the active material coating portion 21 through the limiting convex portion 38, which prevents the bracket 3 from falling off before entering the shell to a certain extent, thereby improving the product quality rate of the battery cell 10.
  • the limiting protrusion 38 forms an annular protrusion, and the annular protrusion extends along the circumference of the battery cell assembly 2 .
  • the limiting protrusion 38 can be an integrated structure, and the limiting protrusion 38 is sleeved on the outside of the battery cell assembly 2.
  • the limiting protrusion 38 can constrain the battery cell assembly 2 in the circumferential direction of the battery cell assembly 2, more effectively reduce the probability of the outer layer of the battery cell assembly 2 becoming fluffy, and also protect one end of the battery cell assembly 2, thereby reducing the problem of one end of the battery cell assembly 2 touching the shell 11, thereby reducing the occurrence of the shell 11 scratching the battery cell assembly 2.
  • the limiting protrusion 38 may include multiple limiting protrusions 38, which are arranged at intervals in the circumferential direction of the battery cell assembly 2, and there is a gap between two adjacent limiting protrusions 38. In this way, the limiting protrusion 38 can not only restrain and protect the battery cell assembly 2, but also reduce materials and costs, and facilitate the assembly of the bracket 3 and the battery cell assembly 2.
  • the arrangement of the plurality of limiting protrusions 38 is not limited to the above situation, and can be selected according to actual needs.
  • the limiting protrusion 38 fits the side wall of the battery cell assembly 2; or, there is a gap between the limiting protrusion 38 and the side wall of the battery cell assembly 2.
  • the limiting protrusion 38 can contact the side wall of the battery cell assembly 2, or it can not contact the side wall of the battery cell assembly 2.
  • the limiting protrusion 38 stops the side wall of the battery cell assembly 2 to reduce the probability of the outer layer of the battery cell assembly 2 becoming fluffy, and also protects the side wall of the battery cell assembly 2, reducing the problem of one end of the battery cell assembly 2 touching the shell 11.
  • FIG. 9 is a partial structural cross-sectional view of a battery cell 10 in some embodiments of the present application.
  • the side surface of the limiting protrusion 38 facing the active material coating part 21 may include a first surface 381, and the first surface 381 is in contact with the side wall of the active material coating part 21.
  • the first surface 381 can constrain the battery cell assembly 2 to reduce the probability of the outer layer of the active material coating part 21 becoming fluffy, and also protect the side wall of the active material coating part 21, thereby reducing the problem of one end of the active material coating part 21 touching the housing 11.
  • the side surface of the limiting protrusion 38 facing the active material coating portion 21 may include a second surface 382, and the distance between the second surface 382 and the active material coating portion 21 gradually increases along the direction of the bracket 3 pointing to the opening 1110, that is, the second surface 382 extends obliquely in a direction away from the root of the limiting protrusion 38 and the side wall of the active material coating portion 21, for example, the second surface 382 may be an inclined surface or a curved surface.
  • the second surface 382 can stop the side wall of the active material coating part 21 to reduce the probability of the outer layer of the active material coating part 21 becoming fluffy, and also protect the side wall of the active material coating part 21.
  • the second surface 382 can play a guiding role, which is convenient for assembly and can improve the assembly efficiency of the battery cell assembly 2 and the bracket 3.
  • Figure 11 is a partial structural cross-sectional view of a battery cell 10 of some other embodiments of the present application.
  • the side surface of the limiting protrusion 38 facing the active material coating part 21 may include a first surface 381 and a second surface 382, the first surface 381 is in contact with the side wall of the active material coating part 21, and the distance between the second surface 382 and the active material coating part 21 gradually increases along the direction of the bracket 3 pointing to the opening 1110, and the first surface 381 is located between the root of the limiting protrusion 38 and the second surface 382.
  • the contour line of the first surface 381 can be a straight line extending vertically along the height direction of the bracket 3, and the contour line of the second surface 382 can be an oblique line inclined along the height direction of the bracket 3.
  • Such a setting can not only play a good restraining role on the active material coating part 21, effectively reducing the probability of the outer layer of the active material coating part 21 becoming fluffy, but also facilitate assembly and improve the assembly efficiency of the battery cell assembly 2 and the bracket 3.
  • Figure 12 is a partial structural cross-sectional view of a battery cell of some other embodiments of the present application.
  • the side of the bracket 3 facing the battery cell assembly 2 has a clearance portion 391, which is used to avoid the outer edge of the battery cell assembly 2 facing the bracket 3, reducing the risk of the bracket 3 crushing the battery cell assembly 2.
  • the avoidance portion 391 can be a groove opening toward the battery cell assembly 2.
  • the groove can be an annular groove.
  • the groove can include multiple grooves arranged at intervals, and the shape of the groove can be selected according to actual conditions.
  • the avoidance portion 391 can also be a avoidance slope or a avoidance arc surface that avoids the battery cell assembly 2.
  • the side of the bracket 3 facing the battery cell assembly 2 can also be in full contact with the battery cell assembly 2, that is, there is no avoidance structure on the side of the bracket 3 facing the battery cell assembly 2.
  • Figure 13 is a structural cross-sectional view of the battery cell 10 of some embodiments of the present application after the battery cell assembly 2 is assembled with the bracket 3 and the insulating member 4.
  • Figure 14 is an enlarged view of the battery cell 10 at B shown in Figure 13.
  • Figure 15 is a structural cross-sectional view of the battery cell 10 of other embodiments of the present application after the battery cell assembly 2 is assembled with the bracket 3 and the insulating member 4.
  • the battery cell 10 may also include an insulating member 4, which is wrapped around the active material coating portion 21, and the insulating member 4 is connected to the extension portion 37.
  • the insulating member 4 and the bracket 3 may be connected by bonding or by hot-melt connection.
  • the insulating member 4 and the bracket 3 may also be connected in other ways.
  • the insulating part 4 is located between the active material coating part 21 and the shell 11, which can play an insulating role and protect the battery cell assembly 2 to prevent the battery cell assembly 2 from overlapping with the shell 11 of the battery cell 10, effectively reducing the corrosion of the battery cell assembly 2 due to leakage; the insulating part 4 is connected to the extension part 37 to facilitate the fixing of the insulating part 4.
  • the insulating member 4 is connected to the peripheral wall surface 370 of the extension portion 37.
  • the "peripheral wall surface 370 of the extension portion 37" refers to the outer wall surface of the extension portion 37 extending along its height direction (the up-down direction in the figure).
  • the peripheral wall surface 370 of the bracket 3 includes four side wall surfaces, each of which is parallel to the height direction of the bracket 3 (the up-down direction in the figure).
  • the bracket 3 is cylindrical
  • the peripheral wall surface 370 of the bracket 3 is a cylindrical surface.
  • the bracket 3 can also be an irregular structure.
  • connection mark 401 can be an annular structure extending along the circumference of the bracket 3, or it can be a plurality of connection structures arranged at intervals in the circumference of the bracket 3.
  • the bracket 3 can be a rectangular plate of corresponding shape
  • the insulating member 4 wraps the four side walls of the battery cell assembly 2, and the insulating member 4 is hot-melt connected to the four side wall surfaces of the bracket 3.
  • the insulating member 4 is hot-melt connected to each side wall surface of the bracket 3 to form a connection mark 401, thereby improving the connection reliability between the insulating member 4 and the bracket 3.
  • the peripheral wall surface 370 has a first step surface 371 and a second step surface 372.
  • the second step surface 372 is located on the side of the first step surface 371 close to the shell cover 112.
  • the second step surface 372 is closer to the active material coating portion 21 than the first step surface 371.
  • the insulating member 4 is connected to the second step surface 372.
  • the peripheral wall surface 370 is set to include a first step surface 371 and a second step surface 372, which can provide an installation space for the insulating part 4.
  • the insulating part 4 is connected to the second step surface 372, which can reduce the risk of the connection structure between the insulating part 4 and the second step surface 372 falling off due to scratching the shell 11, and further improve the connection reliability between the insulating part 4 and the bracket 3.
  • the first step surface 371 is further away from the active material coating portion 21 than the outer side surface of the insulating member 4. In other words, the first step surface 371 exceeds the connection position between the bracket 3 and the insulating member 4. In the process of installing the battery cell assembly 2 with the bracket 3 into the shell 11, the bracket 3 first enters the shell body 111 from the opening 1110, and then the active material coating portion 21 wrapped with the insulating member 4 enters the shell body 111 from the opening 1110.
  • the battery cell 10 further includes an insulating member 4 , the insulating member 4 wraps the active material coating portion 21 , and the insulating member 4 is connected to a surface of the main body portion 36 away from the shell cover 112 .
  • the insulating member 4 is continuously connected to the wall of the main body 36 away from the battery cell assembly 2 in an annular shape.
  • the annular connection here means that the connection position between the insulating member 4 and the main body 36 extends along the circumference of the main body 36 to form a closed ring.
  • Such a configuration can increase the connection area between the insulating part 4 and the bracket 3, so as to improve the connection reliability and stability between the insulating part 4 and the bracket 3 in the circumferential direction of the bracket 3, further reduce the risk of the insulating part 4 falling off, and thereby improve the reliability of the battery cell assembly 2 entering the shell, thereby ensuring the reliability and stability of the battery cell 10.
  • the insulating member 4 is connected to the wall of the bracket 3 away from the battery cell assembly 2 in an annular spaced manner, that is, there are multiple connection positions between the insulating member 4 and the bracket 3, and the multiple connection positions are arranged at intervals in the circumferential direction of the bracket 3.
  • the insulating member 4 and the wall of the bracket 3 away from the battery cell assembly 2 can also be connected in a circumferential and continuous annular shape.
  • the annular connection here means that the connection position between the insulating member 4 and the bracket 3 extends along the circumference of the bracket 3 to form a closed annular shape.
  • the connection area between the insulating member 4 and the bracket 3 can be increased to improve the connection reliability and stability between the insulating member 4 and the bracket 3 in the circumferential direction of the bracket 3, further reduce the risk of the insulating member 4 falling off, and then improve the reliability of the battery cell assembly 2 entering the shell, and ensure the reliability and stability of the battery cell 10.
  • connection positions between the insulating member 4 and the bracket 3 can be concentrated on two opposite sides, two adjacent sides, or multiple sides of the bracket 3, which can be selected according to the actual shapes of the battery cell assembly 2 and the bracket 3 and are not limited here.
  • connection method between the insulating member 4 and the bracket 3 can be a hot melt connection, and the insulating member 4 and the bracket 3 away from the wall of the battery cell assembly 2 are hot-melt connected to form a connection mark 401.
  • the position of the connection mark 401 is not limited by space. Compared with the related art, the area of the connection mark 401 can be designed to be larger, making the connection more secure and reducing the risk of the insulating member 4 falling off.
  • the number of the connection marks 401 is multiple, and the multiple connection marks 401 are arranged at intervals around the circumference of the wall of the bracket 3 away from the battery cell assembly 2.
  • the connection marks 401 can also extend in an annular manner around the circumference of the wall of the bracket 3 away from the battery cell assembly 2, so that the connection between the insulating member 4 and the bracket 3 is more firmly connected, so as to fully improve the connection reliability between the insulating member 4 and the bracket 3 and reduce the risk of the insulating member 4 falling off.
  • the shape of the connection mark 401 can be rectangular, circular, elliptical, etc., or can be an irregular shape.
  • the arrangement of the multiple connection marks 401 can be selected according to the actual shape of the battery cell assembly 2 and the bracket 3. For example, when the cross-sectional shape of the battery cell assembly 2 and the bracket 3 is a square or a rectangle, the multiple connection marks 401 can be distributed near the four edges of the bracket 3, or can be concentrated near the edges on the opposite sides of the bracket 3. For another example, when the cross-sectional shape of the battery cell assembly 2 and the bracket 3 is circular, the multiple connection marks 401 can be evenly distributed around the circumference of the wall of the bracket 3 away from the battery cell assembly 2.
  • connection marks 401 are not limited to the above form, and the distance between two adjacent connection marks 401 can be adjusted as needed.
  • the number of connection marks 401 can be appropriately increased to save materials and reduce costs while ensuring the connection reliability between the insulating part 4 and the bracket 3.
  • the bracket 3 may be a rectangular plate of corresponding shape, the bracket 3 is arranged on a wall surface of the cell assembly 2, and the insulating member 4 wraps the remaining five circumferential walls of the cell assembly 2 to ensure the insulation effect between the cell assembly 2 and the shell 11.
  • the connection mark 401 formed by the insulating member 4 and the wall surface of the bracket 3 away from the cell assembly 2 may be arranged adjacent to the circumferential edge of the bracket 3, and may be adjacent to two, three or four circumferential edges of the bracket 3.
  • the number of connection marks 401 formed by the insulating member 4 and the corresponding edges may be increased or decreased according to the size of the corresponding edges, and the embodiments of the present application are not limited thereto.
  • the hot melt connection can facilitate the cooperation between the insulating member 4 and the bracket 3, improve the assembly efficiency, ensure the efficiency of the battery cell assembly 2 into the shell, and save the assembly and manufacturing costs; on the other hand, no matter Whether the connection mark 401 extends in a circumferential ring shape or is arranged in a circumferential interval shape, it can improve the firmness of the connection between the insulating part 4 and the bracket 3, improve the reliability and stability of the connection between the insulating part 4 and the bracket 3, and fully reduce the risk of the insulating part 4 falling off; at the same time, compared with the circumferential ring extension, the circumferential interval arrangement can also save materials and reduce costs while ensuring the reliability of the connection between the insulating part 4 and the bracket 3.
  • FIG. 16 is a schematic diagram of the structure of the bracket 3 of the battery cell 10 in some embodiments of the present application.
  • FIG. 17 is a schematic diagram of the structure of the bracket 3 of the battery cell 10 in some other embodiments of the present application.
  • the conductive part 22 is connected to the side of the active material coating part 21 close to the main body 36, and the main body 36 has a through hole 311, and the conductive part 22 passes through the through hole 311 to connect with the pole 12.
  • the shape of the via hole 311 can be selected according to the shape of the conductive part 22.
  • the cross-sectional shape of the conductive part 22 that needs to extend into the via hole 311 is a long strip, and the shape of the via hole 311 can be selected to be a regular shape such as a square, a rectangle, an ellipse, or an oblong, or an irregular shape; for another example, the cross-sectional shape of the conductive part 22 that needs to extend into the via hole 311 is a circle, and the shape of the via hole 311 can be selected to be a circle, a square, or an oblong.
  • the outer surface of the conductive part 22 can be in direct contact with the hole wall of the via 311, or there can be a gap between the outer surface of the conductive part 22 and the hole wall of the via 311, so that the conductive part 22 can pass through the via 311 without damaging the conductive part 22.
  • the bracket 3 can play the role of collecting and accommodating the conductive part 22, which facilitates the connection between the conductive part 22 and the pole 12, and can improve the assembly reliability and convenience of the battery cell 10; on the other hand, the bracket 3 collects the conductive part 22, which can eliminate the structure of the original plastic parts in the battery cell 10, and can achieve insulation between the entire active material coating part 21 and the shell 11 through the cooperation of the bracket 3 and the insulating part 4, which can effectively reduce the manufacturing and production costs.
  • the conductive part 22 may also be disposed on one side of the bracket 3 , and the conductive part 22 has no matching relationship with the bracket 3 .
  • the bracket 3 may be an integral structure or a split structure.
  • the via 311 is formed in the form of a through hole that penetrates the bracket 3.
  • the integral structure of the bracket 3 is easy to process, and the reliability of the bracket 3 is good, and it is easy to assemble the bracket 3 with the shell assembly 1, thereby improving the assembly efficiency and matching stability.
  • how the bracket 3 is processed can be specifically selected according to the material of the bracket 3. For example, when the bracket 3 is an insulating plastic part, the integral structure of the bracket 3 can be obtained by injection molding.
  • the bracket 3 when the bracket 3 is a split structure, the bracket 3 may include a first bracket 33 and a second bracket 34 that are formed separately, and a through hole 311 is defined between the first bracket 33 and the second bracket 34 .
  • the first bracket 33 and the second bracket 34 are both long strip-shaped structures, and the two can be detachably connected, for example, the two can be plugged or snap-fitted to facilitate assembly.
  • the first bracket 33 has a half-hole structure on one side close to the second bracket 34, and the second bracket 34 is also provided with another half-hole structure of the same shape close to the first bracket 33.
  • the half-hole structure of the first bracket 33 and the half-hole structure of the second bracket 34 together form a circular through hole 311. That is, the through hole 311 is defined between the first bracket 33 and the second bracket 34.
  • the through hole 311 is defined by the cooperation of the first bracket 33 and the second bracket 34.
  • the first bracket 33 and the second bracket 34 can be assembled at the position of the conductive part 22 to clamp the conductive part 22, so that the through hole 311 surrounds the conductive part 22, which facilitates the assembly of the bracket 3 and the battery cell assembly 2 and improves the assembly efficiency.
  • the first bracket 33 and the second bracket 34 are placed on both sides of the via 311 in the width direction.
  • the width direction of the via 311 is the left and right direction
  • the first bracket 33 and the second bracket 34 are located on the left and right sides of the via 311, so as to facilitate the cooperation between the first bracket 33, the second bracket 34 and the conductive part 22.
  • FIG18 is a partial cross-sectional view of a battery cell 10 provided in some embodiments of the present application.
  • a receiving groove 393 is provided on one side of the main body 36 away from the active material coating portion 21 , and the receiving groove 393 is connected to the via 311 , and is used to receive at least part of the pole 12 .
  • the shape of the receiving groove 393 can match the shape of the pole 12.
  • the shape of the receiving groove 393 can be a regular shape such as a square, a rectangle, an ellipse, or an oblong, or an irregular shape; for another example, when the cross-sectional shape of the pole 12 is a circle, the shape of the receiving groove 393 can be a circle, a square, or an oblong.
  • the outer surface of the pole 12 can be in direct contact with the side wall of the accommodating groove 393, and there can also be a gap between the outer surface of the pole 12 and the side wall of the accommodating groove 393. On the basis of ensuring that the pole 12 is not damaged, at least a part of the pole 12 can be accommodated in the accommodating groove 393.
  • the structure of the entire battery cell 10 is made more compact and reliable, which is conducive to improving the energy density of the entire battery 100; on the other hand, through the setting of the accommodating groove 393, the pole 12 and part of the shell 11 can be insulated by the bracket 3, so as to further improve the stability and reliability of the battery cell 10; in addition, by accommodating the pole 12 through the accommodating groove 393, the stability and reliability of the pole 12 can also be improved, so as to further improve the stability and reliability of the battery cell.
  • a positioning portion 32 is disposed on a side of the main body 36 that is away from the active material coating portion 21 .
  • the positioning portion 32 is disposed around the via hole 311 and extends toward the direction close to the pole 12 .
  • the positioning portion 32 may be an annular boss extending along the circumference of the through hole 311.
  • the positioning portion 32 may include two boss structures disposed opposite to each other, and the two boss structures are located on opposite sides of the through hole 311.
  • the through hole 311 may form an elongated hole, and the two boss structures may be disposed opposite to each other in the width direction of the elongated hole, and each boss structure extends along the length direction of the elongated hole.
  • the positioning portion 32 is used in conjunction with the through hole 311, so that the bracket 3 and the pole 12 can be positioned and installed, which is beneficial to improving the assembly efficiency of the battery cell 10.
  • the positioning portion 32 can restrain, gather and support the conductive portion 22, which is convenient for connecting the conductive portion 22 and the pole 12, and can improve the assembly efficiency and assembly quality of the battery cell 10.
  • the pole 12 is provided with a receiving portion 121, in which at least a portion of the conductive portion 22 is received, and at least a portion of the positioning portion 32 extends into the receiving portion 121 to guide the conductive portion 22 to be received in the receiving portion 121.
  • the pole 12 is configured as a hollow structure.
  • the conductive part 22 can be guided to connect with the pole 12, which can improve the connection reliability and ensure the assembly efficiency and quality; on the other hand, the conductive part 22 can be accommodated in the accommodating part 121, which improves the assembly efficiency of the conductive part 22, saves the space occupied by the conductive part 22, and makes full use of the space of the battery cell 10, so that the cooperation between the bracket 3 and the pole 12, and between the bracket 3 and the conductive part 22 are tighter and more reliable, making the structure of the battery cell 10 more compact, and more conducive to the improvement of the energy density of the battery cell 10.
  • the positioning part 32 cooperates with the accommodating part 121, so that the bracket 3 and the pole 12 can be positioned and installed, which is conducive to improving the assembly efficiency of the battery cell 10.
  • FIG. 18 is a cross-sectional view of the structure of the bracket 3 of the battery cell 10 in some embodiments of the present application.
  • a guide groove 312 is formed on one side of the main body 36 facing the active material coating part 21, the guide groove 312 is connected to the via 311, and the guide groove 312 accommodates at least part of the conductive part 22.
  • the cross-sectional area of the guide groove 312 gradually increases along the direction of the main body 36 approaching the active material coating part 21.
  • the groove wall of the guide groove 312 can be a slope or a curved surface extending from the inside to the outside toward the active material coating portion 21, where "inside” refers to a position close to the center of the guide groove 312, and conversely, “outside” here refers to a position away from the center of the guide groove 312, that is, a position close to the edge of the guide groove 312.
  • the guide groove 312 can accommodate the conductive part 22 and avoid the conductive part 22 to avoid being crushed. It can also reduce the probability of the conductive part 22 becoming fluffy and folded, thereby reducing redundancy.
  • Figure 20 is a top view of the bracket 3 of the battery cell 10 in some embodiments of the present application.
  • Figure 21 is a top view of the bracket 3 of the battery cell 10 in some other embodiments of the present application.
  • the bracket 3 has at least one first liquid injection guide groove 392, and the first liquid injection guide groove 392 is located on the side of the bracket 3 facing the active material coating portion 21.
  • the electrolyte can flow along the first injection guide groove 392 to provide an infiltration path for the electrolyte.
  • the first injection guide groove 392 can increase the fluidity of the electrolyte, improve the injection speed, and reduce the formation static time.
  • the provision of the first injection guide groove 392 increases the contact area between the electrolyte and the active material coating part 21, which can reduce the problem of poor wetting of the active material coating part 21.
  • At least one first liquid injection guide groove 392 is connected to the guide groove 312, and the electrolyte entering the shell 11 can flow along the first liquid injection guide groove 392 toward the guide groove 312, so that the electrolyte can flow to a predetermined position, further increasing the contact area between the electrolyte and the active material coating part 21.
  • the bracket 3 is an integrated structure and two poles 12 are arranged on the shell 11
  • the two ends of the first liquid injection guide groove 392 can respectively correspond to the positions of the two poles 12, and the two ends of the first liquid injection guide groove 392 are respectively connected to the two guide grooves 312, and the electrolyte can flow along the first liquid injection guide groove 392 toward the two guide grooves 312.
  • the bracket 3 may include a separately formed first bracket 33 and a second bracket 34, and a through hole 311 is defined between the first bracket 33 and the second bracket 34.
  • At least one first liquid injection guide groove 392 is respectively provided on the first bracket 33 and the second bracket 34, and the two ends of each first liquid injection guide groove 392 can respectively correspond to the positions of the two poles 12, and the two ends of the first liquid injection guide groove 392 are respectively connected to the two guide grooves 312, and the electrolyte can flow along the first liquid injection guide groove 392 toward the two guide grooves 312.
  • a second liquid injection guide groove (not shown in the figure) can also be provided on the bracket 3 as required, and the second liquid injection guide groove is located on the side of the bracket 3 facing away from the active material coating portion 21.
  • the depth of the first liquid injection guide groove 392 and/or the second liquid injection guide groove is greater than or equal to 0.1 mm.
  • the depth of the first liquid injection guide groove 392 and/or the second liquid injection guide groove can be 0.1 mm, 0.2 mm, 0.5 mm, etc., and the specific selection can be made according to actual needs.
  • the conductive part 22 is connected to the side of the active material coating part 21 close to the bracket 3.
  • the pole 12 is provided with a receiving part 121. At least part of the conductive part 22 is received in the receiving part 121, which is used to guide the conductive part 22 to be received in the receiving part 121, so as to facilitate the electrical connection between the conductive part 22 and the pole 12.
  • the pole 12 is set to a hollow structure.
  • the conductive part 22 can be completely accommodated in the accommodating part 121, or part of the conductive part 22 can be accommodated in the accommodating part 121. Since the pole 12 is provided with the accommodating part 121, the hollow structure of the accommodating part 121 can reduce the weight of the pole 12 to a certain extent, so as to improve the weight energy density of the battery cell 10 and the battery 100.
  • the conductive part 22 can be guided to connect with the pole 12, which can improve the connection reliability and ensure the assembly efficiency and quality; on the other hand, the conductive part 22 can be accommodated in the accommodating part 121, which improves the assembly efficiency of the conductive part 22, and can also save the space occupied by the conductive part 22, and make full use of the space of the battery cell 10, so that the cooperation between the bracket 3 and the pole 12, and between the bracket 3 and the conductive part 22 are tighter and more reliable, so that the structure of the battery cell 10 is more compact, which is more conducive to the improvement of the energy density of the battery cell 10.
  • part or all of the conductive part 22 is contained in the containing part 121, so that the part of the conductive part 22 located in the containing part 121 can occupy the space in the pole 12, which can reduce the space occupied by the conductive part 22 in the shell 11.
  • some space can be saved in the shell 11 to accommodate a larger active material coating part 21, thereby improving the volume energy density of the battery cell 10.
  • the space occupied by the conductive part 22 between the active material coating part 21 and the pole 12 can be saved, the size of the active material coating part 21 in the direction of leading out the conductive part 22 can be increased, the distance between the active material coating part 21 and the pole 12 can be reduced, and the energy density of the battery cell 10 can be improved.
  • the space occupied by the battery cell 10 itself can be reduced, so that the battery 100 of the same volume can accommodate more battery cells 10, and the volume energy density of the battery 100 can be improved; in addition, by accommodating at least part of the conductive portion 22 in the accommodating portion 121, Occupying the space within the pole 12 can reduce the redundancy of the conductive part 22 within the shell 11 to at least a certain extent, reduce the probability of short circuit between the conductive part 22 and the active material coating part 21, reduce the probability of short circuit of the battery cell 10, and improve the working reliability and stability of the battery cell 10 and the battery 100.
  • the accommodation portion 121 may be located on the side of the pole 12 facing the active material coating portion 21 or on the side of the pole 12 away from the active material coating portion 21 .
  • Figure 22 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application.
  • Figure 23 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application.
  • the accommodating portion 121 When the accommodating portion 121 is located on the side of the pole 12 facing the active material coating portion 21, the accommodating portion 121 includes a first accommodating groove 12110, and the surface of the pole 12 facing the active material coating portion 21 is the inner end face 122 of the pole, and the notch of the first accommodating groove 12110 is formed on the inner end face 122 of the pole, and at least a portion of the conductive portion 22 is accommodated in the first accommodating groove 12110.
  • the first receiving groove 12110 is provided on the pole 12 to reduce the weight of the pole 12 to a certain extent, so as to improve the weight energy density of the battery cell 10 and the battery 100; on the other hand, since the notch of the first receiving groove 12110 is formed on the inner end surface 122 of the pole, and the inner end surface 122 of the pole is the surface of the pole 12 close to the active material coating part 21, the first receiving groove 12110 can be opened toward the active material coating part 21, thereby facilitating the conductive part 22 to extend into the first receiving groove 12110, thereby improving assembly efficiency. Moreover, this type of first receiving groove 12110 is easy to process, thereby improving production efficiency.
  • the first receiving groove 12110 can be easily processed to have a larger volume, so as to accommodate more conductive parts 22.
  • the first receiving groove 12110 since the first receiving groove 12110 is open toward the active material coating part 21, the first receiving groove 12110 can also be used as a buffer and temporary storage structure for the electrolyte, so that more electrolyte can be accommodated in the shell 11. Since the electrolyte will be consumed during the charging and discharging process of the battery cell 10, when there is more electrolyte, the service life of the battery cell 10 can be extended.
  • the first receiving groove 12110 is open toward the active material coating part 21, the first receiving groove 12110 can also be used as a receiving and buffer structure for gas production inside the battery cell assembly 2, thereby reducing the expansion of the battery cell 10 and improving the reliability and stability of the battery cell 10.
  • first receiving groove 12110 is located on the inner side of the pole 12, external foreign matter and impurities are not easy to enter the first receiving groove 12110, which can reduce the impact of external foreign matter and impurities on the battery cell assembly 2, improve the working stability and reliability of the battery cell assembly 2, and further improve the stability and reliability of the battery cell 10 and the battery 100.
  • connection method between the pole 12 and the housing 11 is not limited, for example, it can be welding or riveting.
  • the housing 11 has a mounting hole 113, and the pole 12 is riveted and installed at the mounting hole 113.
  • the housing 11 can also be provided with a mounting hole 113 to facilitate the pole 12 to be installed on the housing 11 through the mounting hole 113, which is not limited here.
  • the first accommodating groove 12110 can be set corresponding to the position of the mounting hole 113, or in other words, on the projection plane perpendicular to the axial direction R of the pole 12, the orthographic projection of the first accommodating groove 12110 is located within the orthographic projection range of the mounting hole 113, so that the first accommodating groove 12110 can have a larger depth to accommodate more conductive parts 22, thereby reducing the space occupied by the conductive parts 22 in the shell 11 to a greater extent.
  • the depth H1 of the first accommodating groove 12110 is greater than or equal to the minimum distance H2 from the inner end surface 122 of the pole to the mounting hole 113 .
  • the specific shape of the first receiving groove 12110 is not limited, and can be a regular shape or an irregular shape, such as a cylindrical groove with a rectangular, elliptical, or racetrack cross section, or a cylindrical groove with a rectangular cross section and a A trapezoidal groove with a gradually changing size, or a hemispherical groove with a circular cross section and a gradually changing cross-sectional size, or a hemispherical groove with an elliptical cross section and a gradually changing cross-sectional size, etc. Therefore, the depth H1 of the first receiving groove 12110 refers to: the maximum depth of the first receiving groove 12110 along the axial direction R of the pole 12.
  • the depth H1 of the first receiving groove 12110 is greater than or equal to the minimum distance H2 from the inner end face 122 of the pole to the mounting hole 113, the volume of the pole 12 can be fully utilized, so that the first receiving groove 12110 has a larger depth, which is conducive to accommodating more conductive parts 22, thereby further reducing the space occupied by the conductive parts 22 in the shell 11 to a greater extent, further improving the energy density of the battery cell 10, and further reducing the redundancy of the conductive parts 22 in the shell 11; at the same time, since the first receiving groove 12110 has a large depth, it can also accommodate the gas production of the battery cell assembly 2, thereby ensuring the reliability and stability of the battery cell 10, and can also accommodate more electrolyte to ensure the service life of the battery cell 10.
  • the electrical connection position between the conductive part 22 and the pole 12 can be located on the groove wall of the first accommodating groove 12110 formed by the accommodating part 121.
  • the conductive part 22 and the pole 12 can be electrically connected by welding, and the electrical connection position is the welding position of the conductive part 22 and the pole 12.
  • the welding method of the conductive part 22 and the pole 12 is not limited, for example, it can be laser welding, and according to factors such as the position, angle, or structure of the welding part, vertical welding, inclined welding, lap welding, or edge welding can be selected.
  • the conductive part 22 and the pole 12 can also be electrically connected by other methods instead of welding, such as by providing conductive glue or conductive nails.
  • the following text takes the example of the conductive part 22 and the pole 12 being welded to form an electrical connection, and the welding position is the electrical connection position of the conductive part 22 and the pole 12.
  • the pole 12 specifically includes a first end wall 12111 and a first side wall 12113, the first end wall 12111 is located on a side of the first side wall 12113 away from the active material coating portion 21, the first end wall 12111 and the first side wall 12113 are surrounded to form a first receiving groove 12110, and the electrical connection position of the conductive portion 22 and the pole 12 is located at the first end wall 12111 and/or the first side wall 12113.
  • the conductive portion 22 may be welded to at least one of the first end wall 12111 and the first side wall 12113.
  • the first receiving groove 12110 not only has the function of accommodating at least part of the conductive part 22, but also the groove wall of the first receiving groove 12110 has the function of realizing electrical connection with the conductive part 22, which can simplify the structure of the pole 12, facilitate the processing of the pole 12, and simplify the structure of the conductive part 22, reduce the redundancy of the conductive part 22, and reduce the cost of the conductive part 22.
  • the area where the conductive part 22 is electrically connected to the pole 12 can be set relatively large, which can not only reduce the difficulty of electrical connection, but also improve the reliability and stability of electrical connection, thereby improving the performance of the battery cell 10.
  • the electrical connection position between the conductive part 22 and the pole 12 is located in the first receiving groove 12110, it can not only avoid the electrical connection position protruding from the outside of the pole 12 and occupying the space outside the pole 12, but also enable the electrical connection position to be protected by the pole 12, thereby improving the reliability and stability of the electrical connection between the conductive part 22 and the pole 12.
  • the first end wall 12111 is constructed as a closed structure without any perforations, so that the first receiving tank 12110 is isolated from the external space of the shell 11, thereby avoiding the problem of the electrolyte in the shell 11 leaking from the first receiving tank 12110.
  • the partial shape of the conductive part 22 matches the partial shape of the first end wall 12111, and they are arranged in a close fit and electrically connected, so that the position where the conductive part 22 is electrically connected to the first end wall 12111 extends along the length or width direction of the first end wall 12111.
  • a part of the conductive part 22 can also be a plane and fit to the first end wall 12111, and the fit position is electrically connected, such as by welding. In this way, the area of the electrical connection can be increased, and the reliability and stability of the electrical connection can be improved.
  • the electrical connection between the conductive part 22 and the first end wall 12111 is welding, since the first end wall 12111 is located on the side of the first receiving groove 12110 away from the active material coating part 21, it is convenient to perform welding operations. For example, welding can be performed from the side of the pole 12 away from the active material coating part 21.
  • the shape of the first end wall 12111 is not limited, for example, it can be a flat plate, an arc plate, etc.
  • the first end wall 12111 is arranged at an angle with the axial direction R of the pole 12.
  • it can be a flat plate structure perpendicular to the axial direction R of the pole 12, or it can be an inclined plate structure not perpendicular to the axial direction R of the pole 12, but the inclination direction is not limited.
  • the position where the conductive part 22 is electrically connected to the first end wall 12111 may not extend along the length or width direction of the first end wall 12111, for example, it may be a plurality of discretely arranged points.
  • the conductive part 22 has a plurality of spaced-apart portions that are respectively welded to the first end wall 12111, which will not be elaborated here.
  • Figure 24 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application.
  • a first sinking groove 12112 can be provided on the first end wall 12111, and the sinking direction of the first sinking groove 12112 is the direction away from the active material coating part 21.
  • At least part of the position where the conductive part 22 is electrically connected to the first end wall 12111 is located in the first sinking groove 12112.
  • at least part of the conductive part 22 can be provided in the first sinking groove 12112 and connected to the portion of the first end wall 12111 used to define the first sinking groove 12112.
  • the first sink groove 12112 can be used to realize pre-positioning and limiting of the electrical connection position of the conductive part 22, which is not only conducive to finding the correct position to realize electrical connection and improve production efficiency, but also conducive to improving the stability and reliability of the conductive part 22, and ensuring the stability and reliability of the battery cell 10 during the charging and discharging process; on the other hand, by arranging the first sink groove 12112 on the first end wall 12111, the local wall thickness of the first end wall 12111 can be locally thinned, which is not only conducive to welding, but also conducive to reducing the weight of the pole 12 and improving the weight energy density of the battery cell 10.
  • the pole 12 can also be provided with a first groove 126 as required.
  • the first groove 126 is located on the side of the pole 12 away from the active material coating portion 21, that is, the surface of the side of the pole 12 away from the active material coating portion 21 is the pole outer end face 123, and the notch of the first groove 126 is formed on the pole outer end face 123.
  • the first groove 126 is a groove body, and the groove body is a groove-shaped structure with a certain depth.
  • the first groove 126 is formed as a first groove with a notch opening upward and a groove wall concave downward (that is, a square depression close to the battery cell assembly 2).
  • the first groove 126 is formed as a first groove with a notch opening downward and a groove wall concave upward (that is, a square depression away from the battery cell assembly 2).
  • the weight of the pole 12 can be further reduced, so as to improve the weight energy density of the battery cell 10 and the battery 100;
  • the first groove 126 is located on the outer side of the pole 12, that is, it is open to the side of the pole 12 away from the inside of the shell 11, and the first groove 126 can be used to accommodate or install structural components of the battery 100 that electrically connect the various battery cells 10, so as to make full use of the space in the pole 12 and improve the space utilization and volume energy density of the battery 100.
  • the pole 12 since the pole 12 has both the first receiving groove 12110 and the first groove 126, the first groove 126 is located on the side of the first receiving groove 12110 away from the active material coating portion 21, and the first groove 126 is open in the direction away from the first receiving groove 12110, which is convenient for laser welding the conductive portion 22 and the first end wall 12111 from the outside of the pole 12, that is, the side of the pole 12 away from the active material coating portion 21, through the first groove 126, and it is convenient to realize the electrical connection between the conductive portion 22 and the pole 12 through external welding.
  • it through the above-mentioned structural setting, it is convenient to perform external welding on the pole 12 and the conductive portion 22 through the first groove 126, which is convenient for processing and manufacturing of the battery cell 10, and can save processing and manufacturing costs.
  • the portion between the first groove 126 and the first receiving groove 12110 can be laser welded to the conductive part 22, that is, the spacer part 127 shown in Figure 24 can be laser welded to the conductive part 22 to achieve electrical connection between the battery cell assembly 2 and the pole 12.
  • the thickness of the spacer 127 of the pole 12 located between the first groove 126 and the first receiving groove 12110 is relatively thin. The spacer 127 isolates the first groove 126 and the first receiving groove 12110.
  • the side wall of the spacer 127 close to the active material coating part 21 can be used as the first end wall 12111.
  • the conductive part 22 needs to be welded to the first end wall 12111, since the thickness of the spacer 127 is relatively thin, it is beneficial to realize the welding of the conductive part 22 and the first end wall 12111 through the first groove 126, thereby improving the convenience and reliability of welding.
  • the first receiving groove 12110 can be configured as a shape in which the length of the cross section is greater than the width, such as a rectangular, elliptical, racetrack, etc.
  • the weld mark formed by welding the conductive portion 22 and the pole 12 can be a long strip weld mark parallel to the length direction of the first receiving groove 12110, so as to improve welding reliability and increase the overcurrent performance.
  • the width of the weld mark can be greater than or equal to 6 mm, and the distance between the weld mark and the first side wall 12113 can be greater than or equal to 1 mm, so as to ensure the overcurrent capacity of the battery cell 10 while ensuring the convenience and reliability of welding.
  • the battery cell 10 may further include a slot cover 7 .
  • the slot cover 7 is disposed on the pole 12 and covers the slot opening of the first groove 126 .
  • the pole 12 can be indirectly electrically connected to the busbar through the slot cover 7, and the position and structure of the slot cover 7 can make the electrical connection between the slot cover 7 and the busbar more convenient and the electrical connection area larger. Therefore, by setting the slot cover 7, the electrical connection between adjacent battery cells 10 in the battery 100 can be facilitated, and since the position where the battery cells 10 are electrically connected to each other is located at the slot cover 7, the electrical connection position between the conductive part 22 and the pole 12 can be separated by the first groove 126, and there is less interference between the two, which can further improve the stability and reliability of the battery cells 10.
  • the accommodating portion 121 can also be configured to include a second accommodating groove 12120, and the surface of the pole 12 away from the active material coating portion 21 is the pole outer end face 123, and the notch of the second accommodating groove 12120 is formed on the pole outer end face 123.
  • the second accommodating groove 12120 is connected to the interior of the shell 11 through the through hole 12130, and the conductive portion 22 is penetrated by the through hole 12130 and is at least partially accommodated in the second accommodating groove 12120.
  • the second receiving groove 12120 is a groove body, and the groove body is a groove-shaped structure with a certain depth.
  • the second receiving groove 12120 is formed as a receiving groove with a groove opening upward and a groove wall concave downward.
  • the second receiving groove 12120 is formed as a receiving groove with a groove opening downward and a groove wall concave upward.
  • the pole 12 is provided with a second receiving groove 12120, which can reduce the weight of the pole 12 to a certain extent, so as to improve the weight energy density of the battery cell 10 and the battery 100; on the other hand, since the notch of the second receiving groove 12120 is formed on the outer end surface 123 of the pole, and the outer end surface 123 of the pole is the surface of the pole 12 away from the active material coating part 21, the second receiving groove 12120 can be open in the direction away from the active material coating part 21.
  • the conductive part 22 when at least part of the conductive part 22 is accommodated in the second receiving groove 12120, the conductive part 22 can be easily stored and sorted through the notch of the second receiving groove 12120, and the conductive part 22 can be easily electrically connected to the pole 12 through the notch of the second receiving groove 12120, etc., thereby reducing the production difficulty of the battery cell 10 and improving the production efficiency of the battery cell 10.
  • the second receiving groove 12120 can also be used as a buffer and temporary storage structure for the electrolyte, so that more electrolyte can be accommodated in the shell 11. Since the electrolyte will be consumed during the charging and discharging process of the battery cell 10, when there is more electrolyte, the service life of the battery cell 10 can be extended; and also because the second receiving groove 12120 can be connected with the interior of the shell 11 through the perforation 12130, the second receiving groove 12120 can also be used as a receiving and buffer structure for gas production inside the battery cell assembly 2, thereby reducing the expansion of the battery cell 10 and improving the reliability and stability of the battery cell 10.
  • the electrical connection position between the conductive portion 22 and the pole 12 is not limited.
  • the electrical connection position between the conductive portion 22 and the pole 12 is located at the hole wall of the through hole 12130 formed by the pole 12 .
  • the electrical connection position between the conductive part 22 and the pole 12 on the hole wall of the through hole 12130, it is convenient to electrically connect the conductive part 22 and the pole 12 through the second receiving groove 12120, and when the electrical connection area between the conductive part 22 and the pole 12 is large, the electrical connection between the conductive part 22 and the pole 12 can be used to realize the electrical connection between the through hole 12130.
  • the seal can save sealing costs, reduce electrolyte leakage, and save sealing parts.
  • the conductive part 22 can be welded to the hole wall of the through hole 12130 at the position where the through hole 12130 is connected to the second accommodating groove 12120, which is convenient for operation.
  • the welding mark can be controlled to seal the through hole 12130 using the welding mark and the conductive part 22, so as to improve the problem of electrolyte in the shell 11 leaking from the through hole 12130.
  • the electrical connection position between the conductive portion 22 and the pole 12 may also be located on the groove wall of the second containing groove 12120 formed by the pole 12.
  • the electrical connection operation is facilitated.
  • the conductive portion 22 is welded to the groove wall of the second containing groove 12120 formed by the pole 12, the conductive particles generated by the welding may enter the housing 11, causing a short circuit and other problems.
  • the pole 12 includes a second end wall 12121 and a second side wall 12123.
  • the second end wall 12121 is located on a side of the second side wall 12123 close to the active material coating portion 21.
  • the second end wall 12121 and the second side wall 12123 are arranged to form a second receiving groove 12120.
  • the through hole 12130 is opened on the second end wall 12121.
  • the electrical connection position between the conductive portion 22 and the pole 12 is located on the second end wall 12121 and/or on the second side wall 12123.
  • the conductive portion 22 and the pole 12 can be electrically connected by welding, so the welding position is the electrical connection position of the conductive portion 22 and the pole 12.
  • the conductive portion 22 and the pole 12 can also be electrically connected by other means instead of welding, such as by providing conductive glue or conductive nails, which will not be described in detail here.
  • the following description takes the case where the conductive portion 22 is welded to the pole 12 to form an electrical connection, and the welding position is the electrical connection position between the conductive portion 22 and the pole 12.
  • the electrical connection position between the conductive portion 22 and the pole 12 is located at the second end wall 12121 and/or the second side wall 12123, and the conductive portion 22 may be welded to at least one of the second end wall 12121 and the second side wall 12123.
  • the second receiving groove 12120 not only has the function of accommodating at least part of the conductive part 22, but also the groove wall of the second receiving groove 12120 has the function of realizing electrical connection with the conductive part 22, which can simplify the structure of the pole 12 and facilitate the processing of the pole 12.
  • the through hole 12130 is provided in the second end wall 12121, it is convenient for the conductive part 22 to extend into the second receiving groove 12120 through the through hole 12130, which can simplify the structure of the conductive part 22, reduce the redundancy of the conductive part 22, and reduce the cost of the conductive part 22.
  • the opening direction of the slot of the second receiving slot 12120 makes it easy to electrically connect the conductive part 22 with the slot wall of the second receiving slot 12120 through the slot of the second receiving slot 12120, thereby reducing the difficulty of electrical connection. Furthermore, by utilizing the slot wall of the second receiving slot 12120 to achieve electrical connection with the conductive part 22, the area where the conductive part 22 is electrically connected to the pole 12 can be relatively large, thereby improving the reliability and stability of the electrical connection, thereby improving the performance of the battery cell 10.
  • the electrical connection position between the conductive part 22 and the pole 12 is located in the second receiving groove 12120, it can not only avoid the electrical connection position protruding from the outside of the pole 12 and occupying the space outside the pole 12, but also enable the electrical connection position to be protected by the pole 12, thereby improving the reliability and stability of the electrical connection between the conductive part 22 and the pole 12.
  • the partial shape of the conductive part 22 matches the partial shape of the second end wall 12121, and they are arranged in a close fit and electrically connected, so that the position where the conductive part 22 is electrically connected to the second end wall 12121 extends along the length or width direction of the second end wall 12121.
  • a part of the conductive part 22 can also be a plane and fit to the second end wall 12121, and the fit position is electrically connected, such as by welding. In this way, the area of the electrical connection can be increased, and the reliability and stability of the electrical connection can be improved.
  • the angle ⁇ between the second end wall 12121 and the axial direction R of the pole 12 is equal to 90°, that is, along the direction from the through hole 12130 to the second side wall 12123, the second end wall 12121 and the active material coating portion 21 are equidistant.
  • the conductive portion 22 and the second end wall 12121 are welded easily.
  • the angle ⁇ between the second end wall 12121 and the axial direction R of the pole 12 is greater than 90°, that is, along the axis from the through hole 12130 In the direction of the second side wall 12123, the second end wall 12121 extends obliquely toward the direction close to the active material coating portion 21.
  • the extension distance of the conductive portion 22 along the second end wall 12121 can be increased to increase the reliability of the electrical connection.
  • the angle ⁇ between the second end wall 12121 and the axial direction R of the pole 12 can be 90°-145°, such as 100°, 110°, 120°, 130°, 140°, etc.
  • the second end wall 12121 can be easily processed and convenient for electrical connection with the conductive portion 22, and on the other hand, the space in the pole 12 can be more fully utilized to accommodate the conductive portion 22.
  • the angle ⁇ between the second end wall 12121 and the axial direction R of the pole 12 can be 45°-90°, such as 50°, 60°, 70°, 80°, etc., which can make the second end wall 12121 easy to process and convenient for electrical connection with the conductive portion 22, and can more fully utilize the space in the pole 12 to accommodate the conductive portion 22.
  • the present application is not limited to this.
  • the position where the conductive part 22 is electrically connected to the second end wall 12121 may not extend along the length or width direction of the second end wall 12121, and it may also be a plurality of discretely arranged points.
  • the conductive part 22 has a plurality of spaced-apart portions that are respectively welded to the second end wall 12121, which will not be elaborated here.
  • FIG. 25 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application.
  • a second sinking groove 12122 can be provided on the second end wall 12121 as required, and the second sinking groove 12122 is a groove formed by sinking a part of the second end wall 12121 toward one end close to the active material coating portion.
  • the position where the conductive portion 22 is electrically connected to the second end wall 12121 is at least partially located in the second sinking groove 12122.
  • the portion of the conductive part 22 located in the second groove 12122 is set to match the shape of the second groove 12122, and is fitted to achieve electrical connection.
  • the second groove 12122 can be used to pre-position and limit the electrical connection position of the conductive part 22, which is beneficial to accurately locate the position to achieve electrical connection, improve production efficiency, and improve the stability and reliability of the electrical connection position, so as to ensure the reliability and stability of the charging and discharging operations of the battery cell 10.
  • connection method between the pole 12 and the housing 11 is not limited.
  • it can be welding or riveting.
  • the housing 11 has a mounting hole 113, and the pole 12 is riveted and installed at the mounting hole 113.
  • the housing 11 can also be provided with a mounting hole 113, and the pole 12 is installed at the mounting hole 113.
  • the second accommodating groove 12120 can be set corresponding to the position of the mounting hole 113, or in other words, on the projection plane perpendicular to the axial direction R of the pole 12, the orthographic projection of the second accommodating groove 12120 is located within the orthographic projection range of the mounting hole 113, so that the second accommodating groove 12120 can have a larger depth to accommodate more conductive parts 22, thereby reducing the space occupied by the conductive parts 22 in the shell 11 to a greater extent.
  • the shell 11 has a mounting hole 113 and the pole 12 is installed in the mounting hole 113, along the axial direction R of the pole 12, the depth H3 of the second accommodating groove 12120 is greater than or equal to the minimum distance H4 from the outer end face 123 of the pole to the mounting hole 113.
  • the specific shape of the second receiving groove 12120 is not limited, and can be a regular shape or an irregular shape, such as a cylindrical groove with a rectangular, elliptical, or racetrack-shaped cross section, or a trapezoidal groove with a rectangular cross section and a gradually changing cross section size, or a hemispherical groove with a circular cross section and a gradually changing cross section size, or a hemispherical groove with an elliptical cross section and a gradually changing cross section size, etc.
  • the racetrack shape described herein refers to a shape in which the two short sides of a rectangle are replaced by convex curves.
  • the depth H3 of the second receiving groove 12120 refers to: the maximum depth of the second receiving groove 12120 along the axial direction R of the pole 12. Since the depth H3 of the second receiving groove 12120 is greater than or equal to the minimum distance H4 from the outer end surface 123 of the pole to the mounting hole 113 in the axial direction R of the pole 12, the volume of the pole 12 can be fully utilized, so that the second receiving groove 12120 has a greater depth, which is conducive to accommodating more conductive parts 22, and thus can reduce the occupied space of the conductive parts 22 in the shell 11 to a greater extent, further improve the energy density of the battery cell 10, and further reduce the conductive parts 22 in the shell 11. at the same time, since the second receiving groove 12120 has a greater depth, it can also accommodate the gas production of the battery cell assembly 2, ensuring the reliability and stability of the battery cell 10, and can also accommodate more electrolyte to ensure the service life of the battery cell 10.
  • Figure 27 is a partial cross-sectional schematic diagram of the battery cell 10 provided in some embodiments of the present application
  • Figure 28 is a structural explosion diagram of the battery cell 10 shown in Figure 27.
  • the battery cell 10 may further include a first cover plate 13, the first cover plate 13 cooperates with the pole 12 and closes the notch of the second accommodating groove 12120, and the first cover plate 13 is electrically connected to the pole 12.
  • the first cover plate 13 by setting the first cover plate 13 to close the notch of the second receiving groove 12120, the electrolyte in the shell 11 can be prevented from leaking out of the notch of the second receiving groove 12120, and because the first cover plate 13 closes the notch of the second receiving groove 12120 and is electrically connected to the pole 12, the first cover plate 13 can be used to easily realize the indirect electrical connection between the pole 12 and the busbar component, and it is beneficial to increase the connection area of the electrical connection, thereby helping to reduce the resistance of the electrical connection.
  • the matching mode and matching position of the first cover plate 13 and the pole 12 are not limited, as long as the first cover plate 13 can close the notch of the second receiving groove 12120.
  • the first cover plate 13 can be welded to the pole 12.
  • the conductive portion 22 can first pass through the through hole 12130 and be welded to the groove wall of the second receiving groove 12120, and then the first cover plate 13 and the pole 12 are welded to close the notch of the second receiving groove 12120.
  • FIG. 29 is an exploded view of the structure of the first cover plate shown in FIG. 28, and please refer to FIG. 27-FIG. 29, the first cover plate 13 includes a first conductive member 131 and a second conductive member 132 of different materials, the first conductive member 131 cooperates with and is electrically connected to the pole 12, and the second conductive member 132 cooperates with and is electrically connected to the first conductive member 131.
  • the first cover plate 13 is set to a composite form, and the first conductive member 131 is set to be the same material as the pole 12, so as to facilitate the electrical connection between the first conductive member 131 and the pole 12, for example, the first conductive member 131 can be easily connected to the pole 12 reliably and stably by welding.
  • the second conductive member 132 is made of a different material from the first conductive member 131, it is convenient to use the second conductive member 132 to electrically connect with a busbar component whose material is different from that of the pole 12, for example, the second conductive member 132 can be easily connected to a busbar component whose material is the same as that of the second conductive member 132 reliably and stably by welding.
  • the pole 12 when the pole 12 is a negative pole, the pole 12 is a copper pole, and the current collecting component is an aluminum sheet, at this time, the first conductive member 131 can be set to copper material, and the second conductive member 132 can be set to aluminum material.
  • the pole 12 and the first conductive member 131 are made of the same material and can be effectively welded, and the second conductive member 132 and the current collecting component are made of the same material and can be effectively welded, so that the pole 12 can be effectively connected to the current collecting component indirectly through the first cover plate 13.
  • the welding of the pole 12 and the first conductive member 131 is made of copper material and copper material, which has good fluidity and is not easy to crack, which is conducive to improving the sealing effect of the welding point.
  • the first conductive member 131 is located between the second receiving groove 12120 and the second conductive member 132.
  • the first conductive member 131 since the first conductive member 131 is located between the second receiving groove 12120 and the second conductive member 132, the second receiving groove 12120 and the second conductive member 132 can be separated. Therefore, when the electrolyte in the housing 11 enters the second receiving groove 12120 from the through hole 12130, the first conductive member 131 can be used to prevent the part of the electrolyte from contacting the second conductive member 132, thereby solving the problem of corrosion of the second conductive member 132 by the electrolyte.
  • the matching method of the first conductive member 131 and the second conductive member 132 is not limited.
  • the first conductive member 131 has a second groove 1311, and the second conductive member 132 is embedded in the second groove 1311.
  • the notch of the second groove 1311 is formed on the surface of the first conductive member 131 away from the second receiving groove 12120, so that the second conductive member 132 is exposed from the notch of the second groove 1311.
  • the connection method of the first conductive member 131 and the second conductive member 132 can also be a fastening connection, a clamping connection, etc.
  • the second conductive member 132 by embedding the second conductive member 132 in the first conductive member 131, the difficulty of assembling the first conductive member 131 and the second conductive member 132 can be reduced, the stability and convenience of the cooperation between the first conductive member 131 and the second conductive member 132 can be improved, and the thickness of the first cover plate 13 can be reduced, and the space occupied by the first cover plate 13 can be reduced to improve the space utilization of the battery cell 10.
  • the second conductive member 132 by embedding the second conductive member 132 in the first conductive member 131, the difficulty of assembling the first conductive member 131 and the second conductive member 132 can be reduced, the stability and convenience of the cooperation between the first conductive member 131 and the second conductive member 132 can be improved, and the thickness of the first cover plate 13 can be reduced, and the space occupied by the first cover plate 13 can be reduced to improve the space utilization of the battery cell 10.
  • the second conductive member 132 by embedding the second conductive member 132 in the
  • the second conductive member 132 can be exposed from the surface of the first conductive member 131 away from the second receiving groove 12120 through the notch of the second groove 1311, it is conducive to realizing the electrical connection between the second conductive member 132 and the current collecting component outside the pole 12.
  • the notch of the second groove 1311 is formed on the surface of the first conductive member 131 on the side away from the second receiving groove 12120, it means that the second groove 1311 is open in the direction away from the active material coating portion 21, so that the portion of the groove wall of the first conductive member 131 used to define the second groove 1311 is located between the second receiving groove 12120 and the second conductive member 132 to separate the second receiving groove 12120 from the second conductive member 132, thereby preventing the electrolyte entering the second groove 1311 from contacting the second conductive member 132 and reducing leakage of the electrolyte.
  • the first cover plate 13 may not be a composite form composed of multiple materials.
  • Figure 30 is a partial cross-sectional schematic diagram of a battery cell provided in some embodiments of the present application
  • Figure 31 is a structural explosion diagram of the battery cell shown in Figure 30. Please refer to Figures 30 and 31.
  • the first cover plate 13 can also be set as a non-composite form made of the same material, for example, to adapt to the positive electrode column, which will not be elaborated here.
  • the first cover plate 13 is also embedded in the notch of the second receiving groove 12120.
  • the difficulty of assembling the first cover plate 13 and the pole 12 can be reduced, the assembly stability of the first cover plate 13 and the pole 12 can be improved, and the reliability and convenience of the connection can be improved, and the space occupied by the first cover plate 13 outside the pole 12 can be reduced.
  • the first cover plate 13 is embedded in the notch of the second receiving groove 12120, there can be sufficient space in the second receiving groove 12120 to accommodate the conductive part 22.
  • the cooperation between the first cover plate 13 and the pole 12 is not limited to being embedded in the second receiving groove 12120.
  • the first cover plate 13 can also be directly covered on the outside of the pole 12, that is, directly covered at the notch of the second receiving groove 12120, so as to facilitate the cooperation with the convergence component of the battery 100, which is not limited in this embodiment.
  • At least part of the wall surface at the notch of the second receiving groove 12120 formed by the pole 12 is a guiding inclined surface 12126, and the guiding inclined surface 12126 is used to guide the first cover plate 13 to cooperate with the notch of the second receiving groove 12120.
  • the guiding inclined surface 12126 is used to guide the first cover plate 13 to cooperate with the notch of the second receiving groove 12120.
  • the area of the welding point can be increased, the reliability of the welding connection between the first cover plate 13 and the pole 12 can be improved, and the problem of molten pool collapse or laser injection into the pole 12 during welding can be improved.
  • the second receiving groove 12120 includes a first groove section 12124 and a second groove section 12125 located on a side of the first groove section 12124 close to the outer end surface 123 of the pole.
  • the cross-sectional area of the second groove section 12125 is greater than the cross-sectional area of the first groove section 12124, so that the second receiving groove 12120 is in the shape of a stepped groove, and the connection position of the first groove section 12124 and the second groove section 12125 forms a third step surface 12127, so that when the first cover plate 13 is embedded in the second receiving groove 12120, it can be embedded in the second groove section 12125 and supported on the third step surface 12127.
  • the second accommodating groove 12120 as a stepped groove form, the first cover plate 13 can be stably fitted in the slot position of the second accommodating groove 12120, thereby improving the connection stability between the first cover plate 13 and the pole 12, and by limiting the slot depth of the first slot section 12124, the second accommodating groove 12120 has sufficient space to accommodate the conductive part 22.
  • the cross-sectional area of the second slot segment 12125 can be set to gradually increase in the direction close to the outer end surface 123 of the pole, so that the side wall of the second slot segment 12125 is formed as a guide slope 12126, which is convenient for processing and can simply and effectively meet the guidance requirements.
  • the first cover plate 13 may also be provided with a stress release groove 133 as required.
  • the stress release groove 133 is located in the peripheral area of the first cover plate 13 to assist the first cover plate 13 in stress release.
  • the stress release groove 133 can be used to release the stress generated by welding, improve the transverse conduction of heat, and reduce the probability of damage or deformation of the first cover plate 13.
  • the stress release groove 133 can be set on the first conductive member 131 and located in the outer peripheral area of the second conductive member 132.
  • the stress release groove 133 can be used to release the stress generated by welding, improve the transverse conduction of heat, and reduce the probability of damage or deformation of the second conductive member 132.
  • the stress release groove 133 can be used to release the stress generated by welding, improve the transverse conduction of heat, and reduce the probability of causing deformation of the first conductive member 131, resulting in the first conductive member 131 being unable to be embedded in the second receiving groove 12120.
  • the battery cell 10 may further be provided with a second cover plate 14 as required, and the second cover plate 14 is covered outside the through hole 12130 and is simultaneously located outside the conductive portion 22 in the second receiving groove 12120 .
  • the battery cell 10 when the battery cell 10 includes the second cover plate 14, the battery cell 10 may include the first cover plate 13 at the same time, or may not include the first cover plate 13 at the same time. Further, when the battery cell 1 includes the second cover plate 14 and the first cover plate 13 at the same time, the first cover plate 13 may be a composite form using multiple materials, or may be a non-composite form using the same material.
  • the second cover plate 14 covers the conductive part 22 of this part.
  • the second cover plate 14 also covers the through hole 12130, so that when the electrolyte enters the second receiving groove 12120 from the through hole 12130, the second cover plate 14 can improve the problem of overflow of this part of the electrolyte from the pole 12, thereby improving the reliability of the battery cell 10.
  • the second cover plate 14 when a part of the conductive part 22 is sandwiched between the second cover plate 14 and the second end wall 12121, laser welding can be used to weld the part of the conductive part 22, the second cover plate 14 and the second end wall 12121 together to improve the reliability of the connection between the pole 12 and the conductive part 22.
  • the second cover plate 14 since the second cover plate 14 can press the conductive part 22, the second cover plate 14 can be used to improve the stability of the conductive part 22 contained in the second containing groove 12120.
  • FIG. 32 is an assembly diagram of a battery cell 10 according to some embodiments of the present application.
  • the shell cover 112 covers the opening 1110
  • the bracket 3 is located at one end of the battery cell assembly 2 away from the opening 1110 .
  • the opening 1110 may be located on the top wall, bottom wall or side wall of the shell body 111.
  • the other walls are all closed structures, and the battery cell assembly 2 with the bracket 3 and the insulating member 4 can only be installed into the shell body 111 from the opening 1110.
  • the shell cover 112 is closed at the opening 1110 to seal the opening 1110.
  • the insulating member 4 is pressed between the top wall of the shell body 111 and the bracket 3, which can reduce the risk of the insulating member 4 falling off, reduce the risk of the battery cell assembly 2 failing due to leakage, and reduce the risk of the shell 11 being corroded, thereby improving the reliability and stability of the battery cell 10.
  • an opening 1110 is set on the shell body 111, and the bracket 3 is set at the end of the battery cell assembly 2 away from the opening 1110.
  • the battery cell assembly 2 with the bracket 3 and the insulating component 4 can only be installed into the shell body 111 from the opening 1110.
  • the shell entry direction is unique, which is conducive to improving the installation efficiency.
  • the shell body 11 will not scratch the edge of the insulating component 4, nor will it scratch the connection position between the insulating component 4 and the bracket 3.
  • the connection reliability between the insulating component 4 and the bracket 3 can be improved, and the risk of the insulating component 4 falling off can be reduced.
  • the risk of the shell body 11 being corroded due to leakage of the battery cell assembly 2 can be reduced, the risk of failure of the battery cell assembly 2 itself can be reduced, and the risk of leakage can be reduced, thereby improving the reliability and stability of the battery single body 10.
  • all poles 12 may be disposed on the shell cover 112 , that is, all poles 12 are located on a side of the battery cell assembly 2 away from the bracket 3 , and the conductive portion 22 may be electrically connected to the corresponding poles 12 on the shell cover 112 .
  • one of the poles 12 may be disposed on the housing cover 112, and the other pole 12 may be disposed on the housing body 111.
  • one of the conductive portions 22 can be electrically connected to the pole 12 on the housing cover 112 .
  • all poles 12 may be disposed on the end wall of the shell body 111 opposite to the opening 1110 , and the conductive portion 22 may pass through the bracket 3 and be electrically connected to the poles 12 on the end wall of the shell body 111 .
  • the housing 111 has a mounting wall 1112 opposite to the opening 1110, and at least one pole 12 is disposed on the mounting wall 1112.
  • the battery cell assembly 2 enters the housing 111 along the opening 1110, and the conductive portion 22 directly faces the pole 12, so that the conductive portion 22 can be connected to the pole 12 more easily, thereby improving the assembly efficiency of the battery cell 10.
  • the top wall of the shell body 111 is the installation wall 1112
  • the bottom wall of the shell body 111 has an opening 1110
  • the shell cover 112 is arranged at the bottom of the shell body 111.
  • the battery cell assembly 2 can be installed in the shell body 111 from bottom to top along the Z direction, so that the conductive part 22 can be easily connected to the pole 12.
  • FIG 33 is an assembly diagram of the battery cell 10 of some other embodiments of the present application.
  • two openings 1110 are provided on the shell body 111, and a bracket 3 is provided at one end of the battery cell assembly 2 away from any opening 1110.
  • the battery cell assembly 2 with two brackets 3 and an insulating member 4 can be loaded into the shell body 111 from any opening 1110, and a suitable shell entry direction can be selected as needed.
  • a portion of the insulating member 4 can be pressed between the wall of the shell body 111 opposite to one of the openings 1110 and the corresponding bracket 3, and another portion of the insulating member 4 can be pressed between the wall of the shell body 111 opposite to the other opening 1110 and the corresponding bracket 3, thereby further reducing the risk of the insulating member 4 falling off, reducing the risk of the battery cell assembly 2 failing due to leakage, and reducing the risk of the shell 11 being corroded, thereby improving the reliability and stability of the battery cell 10.
  • the two openings 1110 may be located on the top wall, bottom wall or side wall of the shell body 111.
  • the two openings 1110 may be provided on two oppositely disposed walls of the shell body 111, for example, the two openings 1110 may be provided on the top wall and the bottom wall of the shell body 111, respectively, or for another example, the two openings 1110 may be provided on two oppositely disposed side walls of the shell body 111, respectively.
  • the two openings 1110 may also be provided on two adjacently disposed walls of the shell body 111, for example, the two openings 1110 may be provided on the adjacently disposed top wall and the side wall of the shell body 111, respectively, or for another example, the two openings 1110 may be provided on the adjacently disposed bottom wall and the side wall of the shell body 111, respectively, or for another example, the two openings 1110 may be provided on the adjacently disposed side walls of the shell body 111, respectively.
  • the two openings 1110 are respectively arranged on two oppositely arranged walls of the shell body 111, the remaining walls are all closed structures, one of the openings 1110 is covered with a first shell cover 1121, and the other opening 1110 is covered with a second shell cover 1122.
  • All the poles 12 can be arranged on the first shell cover 1121, or all the poles 12 can be arranged on the second shell cover 1122, or a part of the poles 12 are arranged on the first shell cover 1121 or the second shell cover 1122, and the other part of the poles 12 are arranged on the shell body 111.
  • a pole 12 is respectively provided on the first shell cover 1121 and the second shell cover 1122.
  • a bracket 3 is provided at both ends of the battery cell assembly 2.
  • the battery cell assembly 2 with the bracket 3 and the insulating member 4 can be loaded into the shell body 111 from any opening 1110.
  • the two shell covers 112 are respectively covered on the two openings 1110 to seal the corresponding openings 1110.
  • one of the conductive parts 22 passes through one bracket 3 and is electrically connected to the pole 12 on the first shell cover 1121, and the other conductive part 22 passes through the other bracket 3 and is electrically connected to the pole 12 on the second shell cover 1122.
  • At least one pole 12 is disposed on the shell wall of the shell 11 adjacent to the bracket 3.
  • the battery cell assembly 2 with the bracket 3 and the insulating member 4 enters the shell body 111 along the opening 1110, and the conductive portion 22 directly faces the pole 12, so that the conductive portion 22 can be easily connected to the pole 12, thereby improving the assembly efficiency of the battery cell 10.
  • FIG. 3 to FIG. 6 Please refer to FIG. 3 to FIG. 6 again to describe the battery cell 10 of a specific embodiment of the present application.
  • the battery cell 10 is a rectangular parallelepiped, the height direction of the battery cell 10 is the first direction Z, the length direction of the battery cell 10 is the second direction X, and the thickness direction of the battery cell 10 is the third direction Y.
  • the battery cell 10 includes a shell 11, and the shell 11 includes a shell body 111 and a shell cover 112.
  • the shell body 111 is a square ring structure, one end of the shell body 111 along the first direction Z is open, and the other end along the first direction Z is closed, and the shell cover 112 is covered at the open position of the shell body 111.
  • Two poles 12 are provided at the closed end of the shell body 111 along the first direction Z, and the two poles 12 are spaced apart along the second direction X to be a positive pole and a negative pole, respectively.
  • Both poles 12 are provided with a receiving portion 121, and the receiving portion 121 includes a second receiving groove 12120.
  • the first pole 12 includes a second end wall 12121 and a second side wall 12123, and the second end wall 12121 is located on the side of the second side wall 12123 close to the shell cover 112.
  • the second end wall 12121 and the second side wall 12123 are arranged to form the second receiving groove 12120.
  • the surface of the first pole 12 away from the shell cover 112 is the pole outer end face 123, and the notch of the second receiving groove 12120 is formed on the pole outer end face 123.
  • a through hole 12130 is opened on the second end wall 12121.
  • the battery cell 10 also includes a cell assembly 2, a bracket 3 and an insulating member 4.
  • the cell assembly 2 includes an active material coating portion 21 and a conductive portion 22.
  • the active material coating portion 21 is accommodated in the shell 11.
  • the bracket 3 is arranged at one end of the active material coating portion 21, and the bracket 3 is located between the closed end of the shell body 111 along the first direction Z and the active material coating portion 21.
  • the bracket 3 has two vias 311, and the two vias 311 are spaced apart along the second direction X.
  • the bracket 3 has a main body 36 and an extension portion 37, and the extension portion 37 is arranged on the peripheral side of the main body 36.
  • the projection of the main body 36 on the plane of the shell cover 112 is located inside the projection of the active material coating portion 21 on the plane of the shell cover 112, and the projection of the extension portion 37 on the plane of the shell cover 112 is located outside the projection of the active material coating portion 21 on the plane of the shell cover 112.
  • an independent bracket 3 is used to replace the plastic part embedded under the top cover in the related art, and the bracket 3 is matched with the battery cell assembly 2 and then inserted into the shell together.
  • the bracket 3 can not only constrain the active material coating part 21, but also the extension part 37 can protect the active material coating part 21, reduce the probability of the active material coating part 21 touching the shell 11, and minimize the occurrence of the shell 11 scratching the active material coating part 21, thereby improving the reliability of the battery cell 10, and the installation steps are simple, which is conducive to improving production efficiency.
  • the present application further provides a battery 100, comprising the battery cell 10 described in any of the above schemes.
  • the bracket 3 can not only constrain the active material coating portion 21, but also the extension portion 37 can protect the active material coating portion 21, thereby reducing the probability of the active material coating portion 21 touching the shell 11, and minimizing the phenomenon of the shell 11 scratching the active material coating portion 21, thereby improving the reliability of the battery 100, and the installation steps are simple, which is conducive to improving production efficiency.
  • the present application further provides an electric device 1000 , comprising the battery 100 described in the above solution, and the battery 100 is used to provide electric energy to the electric device 1000 .
  • the power device 1000 since the power device 1000 is provided with the above-mentioned battery 100, the working reliability and stability of the battery 100 can be improved, and the working reliability and stability of the power device 1000 can be improved. It can be understood that when the power device 1000 is a vehicle, since the service life of the battery 100 is improved, it is beneficial to improve the cruising range of the vehicle.
  • the power-consuming device 1000 may be any of the aforementioned devices or systems using the battery 100 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Cell Separators (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请公开了一种电池单体、电池和用电装置。电池单体包括:壳体,包括壳盖和壳身;电芯组件,包括活性物质涂覆部;支架,设置于活性物质涂覆部远离壳身的开口的一端,并与电芯组件配合;支架具有主体部和设于主体部周侧的延伸部,主体部在壳盖平面上的投影位于活性物质涂覆部在壳盖平面上的投影内,延伸部在壳盖平面上的投影位于活性物质涂覆部在壳盖平面上的投影外。本申请实施例的技术方案中,可以降低活性物质涂覆部触碰壳体的概率,减少壳体刮伤活性物质涂覆部现象的发生。

Description

电池单体、电池和用电装置 技术领域
本申请涉及电池领域,具体涉及一种电池单体、电池和用电装置。
背景技术
节能减排是汽车产业可持续发展的关键,电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言,电池技术又是关乎其发展的一项重要因素。在相关技术中,提高电池单体的使用可靠性是亟待解决的问题。
发明内容
鉴于上述问题,本申请提供一种电池单体、电池和用电装置,电池单体的支架能够提高电池单体的使用可靠性。
第一方面,本申请提供了一种电池单体,包括:壳体,包括壳盖和具有开口的壳身,壳盖盖合于开口;电芯组件,包括活性物质涂覆部,活性物质涂覆部设于壳体内;支架,设置于活性物质涂覆部远离开口的一端,并与电芯组件配合;其中,支架具有主体部和设于主体部周侧的延伸部,主体部在壳盖平面上的投影位于活性物质涂覆部在壳盖平面上的投影内,延伸部在壳盖平面上的投影位于活性物质涂覆部在壳盖平面上的投影外。
本申请实施例的技术方案中,将支架设置于活性物质涂覆部远离开口的一端,主体部在壳盖平面上的投影设置于活性物质涂覆部在壳盖平面上的投影内,之后一起入壳,在将带有支架的电芯组件装入壳体内的过程中,支架会优先接触壳身,一定程度上防止壳身靠近开口处的端部直接接触活性物质涂覆部,尽可能地减少壳体刮伤活性物质涂覆部现象的发生;将延伸部在壳盖平面上的投影设置于活性物质涂覆部在壳盖平面上的投影外,可以在入壳过程中对活性物质涂覆部形成保护,降低活性物质涂覆部触碰壳体的概率,进一步减少壳体刮伤活性物质涂覆部现象的发生。此外,通过设置支架减少壳体刮伤活性物质涂覆部现象的发生,以减小活性物质脱落的可能性,一定程度上防止脱落的活性物质与相反极性的极片搭接导致的内部短路,且一定程度上防止脱落的活性物质与壳体发生化学反应,进而导致壳体被腐蚀穿透,从而提高电池单体的使用可靠性。
在一些实施例中,延伸部位于主体部沿预设方向相对的两侧,预设方向平行于壳盖平面,可以防止活性物质涂覆部的相对两侧边缘触碰到壳体,避免壳体刮伤活性物质涂覆部的相对两侧边缘。
在一些实施例中,延伸部为环绕主体部的环形结构。支架可以对活性物质涂覆部的一端的外缘形成保护,防止活性物质涂覆部朝向支架的一侧外缘触碰壳体,避免壳体刮伤活性物质涂覆部的现象发生,进一步提高电池单体的使用可靠性。
在一些实施例中,延伸部背向壳盖的表面的边缘具有导向面,导向面包括弧面和/或斜面。导向面可以起到导向作用,使支架可以顺利装入壳身内,提高装配效率。
在一些实施例中,支架与电芯组件卡接或者粘接,使支架与电芯组件连接一起,一定程度上防止支架在入壳之前脱落,从而提高电池单体的产品优率;支架与电芯组件可以一起入壳,既可以对电芯组件形成保护,保证电芯组件可以顺利且安全入壳,又可以起到绝缘作用。
在一些实施例中,延伸部靠近壳盖的一侧设有限位凸部,支架通过限位凸部与活性物质涂覆部卡接。如此设置,限位凸部可以约束活性物质涂覆部的一端,降低活性物质涂覆部的外层发生蓬松的概率,还对活性物质涂覆部的一端形成保护,减少活性物质涂覆部的一端触碰壳体的问题,由此减少壳体刮伤活性物质涂覆部的现象发生;支架通过限 位凸部与活性物质涂覆部卡接,一定程度上防止支架在入壳之前脱落,从而提高电池单体的产品优率。
在一些实施例中,限位凸部的朝向活性物质涂覆部的一侧表面包括:第一表面,第一表面与活性物质涂覆部的侧壁贴合;和/或,第二表面,第二表面与活性物质涂覆部之间的距离沿支架指向开口的方向逐渐增大。第一表面和第二表面可以约束电芯组件,以降低电芯组件的外层发生蓬松的概率,还对电芯组件的侧壁形成保护,减少电芯组件的一端触碰壳体的问题;第二表面可以起到导向作用,便于装配,提高电芯组件与支架的组装效率。
在一些实施例中,电池单体还包括:绝缘件,绝缘件包裹活性物质涂覆部且与延伸部连接。绝缘件位于活性物质涂覆部与壳体之间,可以起到绝缘作用,并对电芯组件形成保护,防止电芯组件与电池单体的壳体搭接,有效地减少电芯组件因裸漏而发生腐蚀的现象;将绝缘件与延伸部连接,以便于固定绝缘件。
在一些实施例中,绝缘件与延伸部的周壁面连接,可以提高绝缘件与支架的周壁的连接可靠性,减少绝缘件脱落的风险。
在一些实施例中,周壁面具有第一台阶面和第二台阶面,第二台阶面位于第一台阶面靠近壳盖的一侧,第二台阶面相比第一台阶面更靠近活性物质涂覆部,绝缘件连接于第二台阶面。在上述技术方案中,将周壁面设置为包括第一台阶面和第二台阶面,可以为绝缘件提供了安装空间,将绝缘件连接于第二台阶面,可以降低绝缘件与第二台阶面之间的连接结构因刮擦到壳体而发生脱落的风险,进一步提高了绝缘件与支架之间的连接可靠性。
在一些实施例中,第一台阶面相比绝缘件的外侧面更远离活性物质涂覆部。第一台阶面既可以保护绝缘件的边缘和活性物质涂覆部的边缘,减少绝缘件的边缘以及活性物质涂覆部的边缘刮擦到壳体内壁的现象发生,又可以对绝缘件与第二台阶面的连接位置进行保护,降低绝缘件与第二台阶面之间的连接结构因刮擦到壳体而发生脱落的风险,进一步提高了绝缘件与支架之间的连接可靠性。
在一些实施例中,电池单体还包括:绝缘件,绝缘件包裹活性物质涂覆部且与主体部远离壳盖的表面连接。一方面,在将带有支架的电芯组件装入壳体内的过程中,壳体不会刮擦到绝缘件的边缘,也不会刮擦到绝缘件与主体部之间的连接位置,并且二者的连接位置不容易在入壳过程中被拉开,能减少在电芯组件入壳过程中绝缘件的窜动和滑移,可以提高绝缘件与支架之间的连接可靠性,降低绝缘件脱落的风险,进而可以降低电芯组件因裸漏使壳体被腐蚀的风险,降低电芯组件自身失效的风险,且降低漏液的风险,继而能提高电池单体的可靠性和稳定性;另外,将绝缘件的至少一部分与主体部的远离电芯组件的壁面连接,还可以将绝缘件的尺寸设计的更长,可以适用不同尺寸的电芯组件,具有更高的兼容能力,可制造性能够得到提升。另一方面,支架和电芯组件在壳体内安装到位之后,绝缘件压在壳体的与开口相对的壁面和主体部之间,能进一步降低绝缘件脱落的风险,降低电芯组件因裸漏而失效的风险,同时降低壳体被腐蚀的风险,提高电池单体的可靠性和稳定性。
在一些实施例中,壳体上设有极柱,壳体上设有极柱;电芯组件还包括导电部,导电部与活性物质涂覆部靠近主体部的一侧连接,主体部具有过孔,导电部穿过过孔以与极柱连接。在上述技术方案中,一方面,通过在主体部上设置过孔,使支架可以起到收拢以及容纳导电部的作用,方便导电部与极柱的连接,能提高电池单体的装配可靠性和便捷性;另一方面,支架收拢导电部,可省去原本电池单体中塑胶件的结构,能通过支架和绝缘件的配合实现整个活性物质涂覆部与壳体之间的绝缘,能有效地降低制造和生产成本。
在一些实施例中,支架为一体式结构;或者,支架为分体式结构且包括单独成型的第一支架和第二支架,第一支架与第二支架之间限定出过孔。一体式结构的支架便于加工,且支架的可靠性较好,并且便于支架与壳体组件装配,提高装配效率和配合稳定性。通过第一支架和第二支架的配合限定出过孔,在支架与电芯组件装配时,无需将导电部从过孔 的一端穿到另一端,而是可以将第一支架和第二支架在导电部的位置拼合夹住导电部,使得过孔环绕导电部,便于支架与电芯组件的装配,提高装配效率。
在一些实施例中,主体部的背离活性物质涂覆部的一侧开设有与过孔连通的容置槽,容置槽用于容纳至少部分极柱。在上述技术方案中,一方面,通过容置槽容纳至少部分极柱,使得整个电池单体的结构更紧凑和可靠,利于实现整个电池的能量密度的提高;另一方面,通过容置槽的设置,还能通过支架实现极柱与壳体的部分位置的绝缘,以进一步地提高电池单体地稳定性与可靠性。
在一些实施例中,主体部的背离活性物质涂覆部的一侧设置有定位部,定位部围设在过孔的周向,且向靠近极柱的方向延伸。定位部可以束缚、收拢、支撑导电部,便于连接导电部与极柱,能提高电池单体地装配效率和装配质量。
在一些实施例中,极柱上设有容纳部,导电部的至少部分容纳于容纳部内,定位部的至少部分伸入容纳部内,并用于引导导电部伸入于容纳部内。在上述技术方案中,一方面,通过将极柱设置为空心结构,且将定位部与空心结构配合,能引导导电部与极柱连接,能提高连接可靠性,且保证装配效率和质量;另一方面,导电部能容纳在容纳部内,提高了导电部的装配效率,还能节约导电部占用空间,充分利用电池单体的空间,使得支架与极柱之间、支架与导电部之间的配合均更紧密和可靠,使得电池单体的结构跟紧凑,更利于电池单体的能量密度的提升。
在一些实施例中,主体部的朝向活性物质涂覆部的一侧形成有与过孔连通的引导槽,引导槽容纳至少部分导电部,沿主体部靠近活性物质涂覆部的方向,引导槽的横截面积逐渐增大。引导槽既可以容纳导电部,又可以对导电部进行避让,避免压伤导电部,还可以降低导电部发生蓬松、翻折的概率,减少冗余。
在一些实施例中,支架上具有至少一个第一注液导流槽,第一注液导流槽位于支架的朝向活性物质涂覆部的一侧,至少一个第一注液导流槽连通引导槽。注液时,电解液可以沿着第一注液导流槽流动朝向引导槽流动,使电解液可以流动至预定位置,增加了电解液和活性物质涂覆部的接触面积,第一注液导流槽的设置增加了电解液和活性物质涂覆部的接触面积,可以减少活性物质涂覆部浸润不良的问题。
在一些实施例中,支架上具有第一注液导流槽,第一注液导流槽位于支架的面向活性物质涂覆部的一侧;和/或,支架上具有第二注液导流槽,第二注液导流槽位于支架的背向活性物质涂覆部的一侧。注液时,电解液可以沿着第一注液导流槽和/或第二注液导流槽流动,为电解液提供浸润路径,且可以增加电解液的流动性,提高注液速度,降低化成静置时间。
在一些实施例中,支架的朝向电芯组件的一侧具有避空部,用于避让电芯组件朝向支架的一侧的外缘。通过设置避空部,可以去除限位凸部和主体部之间的圆角结构,防止圆角结构压伤电芯组件的外缘。
在一些实施例中,电芯组件还包括导电部,导电部与活性物质涂覆部靠近主体部的一侧连接;壳体上设有极柱,极柱上设有容纳部,导电部的至少部分容纳于容纳部内且与极柱连接。通过将导电部的至少部分容纳于容纳部内,使得电池单体自身所占用空间可以减小,使得相同体积的电池可容纳更多数量的电池单体,还能提升电池的体积能量密度;另外,将导电部的至少部分容纳于容纳部内,以占用极柱内的空间,可以在至少一定程度上减小导电部在壳体内的冗余,降低导电部与活性物质涂覆部之间短接的几率,降低电池单体短路的几率,提高电池单体和电池的工作可靠性与稳定性。
在一些实施例中,容纳部具有第一容纳槽,极柱朝向活性物质涂覆部一侧的表面为极柱内端面,第一容纳槽的槽口形成在极柱内端面上,导电部的至少部分容纳于第一容纳槽内。在上述技术方案中,一方面,在极柱上开设第一容纳槽可一定程度减轻极柱的重量,以能提高电池单体和电池的重量能量密度;另一方面,由于第一容纳槽的槽口形成在极柱内端面上,且极柱内端面为极柱的靠近活性物质涂覆部一侧的表面,使得第一容纳槽可以 朝向活性物质涂覆部的方向敞开,进而方便导电部伸入第一容纳槽内,提高装配效率。而且,此种形式的第一容纳槽便于加工,提高生产效率。
在一些实施例中,容纳部具有第二容纳槽,极柱远离活性物质涂覆部一侧的表面为极柱外端面,第二容纳槽的槽口形成在极柱外端面上,第二容纳槽通过穿孔与壳体的内部连通,导电部穿设于穿孔且至少部分容纳于第二容纳槽内。在上述技术方案中,一方面,极柱设置第二容纳槽,可一定程度减轻极柱的重量,以能提高电池单体和电池的重量能量密度;另一方面,由于第二容纳槽的槽口形成在极柱外端面上,且极柱外端面为极柱的远离活性物质涂覆部一侧的表面,使得第二容纳槽可以朝向背离活性物质涂覆部的方向敞开,这样,当将导电部的至少部分容纳于第二容纳槽内时,可以容易地通过第二容纳槽的槽口实现对导电部的收纳整理,且可以容易地通过第二容纳槽的槽口实现对导电部与极柱的电连接操作等,进而可以降低电池单体的生产难度,提高电池单体的生产效率。
在一些实施例中,开口的数量为两个,每个开口处均设有一个壳盖,支架设置于活性物质涂覆部远离任意一个开口的一端。在上述技术方案中,在壳身上设置两个开口,并在电芯组件远离任意一个开口的一端设置支架,带有两个支架、绝缘件的电芯组件可以从任意一个开口装入壳身内,可以根据需要选择合适的入壳方向,电芯组件在壳身内安装到位之后,绝缘件的一部分可以压在壳身的与其中一个开口相对的壁和对应的支架之间,绝缘件的另一部分可以压在壳身的与其中另一个开口相对的壁和对应的支架之间,进一步降低绝缘件脱落的风险,降低电芯组件因裸漏而失效的风险,同时降低壳体被腐蚀的风险,提高电池单体的可靠性和稳定性。
在一些实施例中,壳体邻近支架的一侧的壳壁上设置有至少一个极柱。带有支架、绝缘件的电芯组件顺着开口进入壳身,导电部直接与极柱相对,可以使导电部能比较容易与极柱进行连接,提高电池单体的装配效率。
第二方面,本申请提供了一种电池,其包括上述实施例中的电池单体。
在上述技术方案中,由于电池设置上述的电池单体,支架不仅可以约束活性物质涂覆部,而且延伸部可以对活性物质涂覆部形成保护,降低活性物质涂覆部触碰壳体的概率,尽可能地减少壳体刮伤活性物质涂覆部的现象发生,提高电池的使用可靠性,并且安装步骤简单、有利于提高生产效率。
第三方面,本申请提供了一种用电装置,其包括上述实施例中的电池。在上述技术方案中,由于用电装置设置上述的电池,由于电池的工作可靠性与稳定性可以提升,可以提升用电装置的工作可靠性与稳定性。
上述说明仅是本申请技术方案的概述,为了能够更清楚了解本申请的技术手段,而可依照说明书的内容予以实施,并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂,以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图;
图2为本申请一些实施例提供的电池的结构爆炸图;
图3为本申请一些实施例提供的电池;
图4为本申请一些实施例的电池单体的结构分解图;
图5为本申请一些实施例的电池单体的结构剖视图;
图6为图5中所示的电池单体在A处的放大图;
图7为本申请一些实施例的电池单体的主视图;
图8为本申请另一些实施例的电池单体的主视图;
图9为本申请一些实施例的电池单体的局部结构剖视图;
图10为本申请另一些实施例的电池单体的局部结构剖视图;
图11为本申请又一些实施例的电池单体的局部结构剖视图;
图12为本申请再一些实施例的电池单体的局部结构剖视图;
图13为本申请一些实施例的电池单体的电芯组件与支架、绝缘件装配后的结构剖视图;
图14为图13中所示的电池单体在B处的放大图;
图15为本申请另一些实施例的电池单体的电芯组件与支架、绝缘件装配后的结构剖视图;
图16为本申请一些实施例的电池单体的支架的结构示意图;
图17为本申请另一些实施例的电池单体的支架的结构示意图;
图18为本申请一些实施例提供的电池单体的局部剖视示意图;
图19为本申请一些实施例的电池单体的支架的结构剖视图;
图20为本申请一些实施例的电池单体的支架的俯视图;
图21为本申请另一些实施例的电池单体的支架的俯视图;
图22为本申请一些实施例提供的电池单体的局部剖视示意图;
图23为本申请一些实施例提供的电池单体的局部剖视示意图;
图24为本申请一些实施例提供的电池单体的局部剖视示意图;
图25为本申请一些实施例提供的电池单体的局部剖视示意图;
图26为本申请一些实施例提供的电池单体的局部剖视示意图;
图27为本申请一些实施例提供的电池单体的局部剖视示意图;
图28为图27所示的电池单体的结构爆炸图;
图29为图28所示的第一盖板的结构爆炸图;
图30为本申请一些实施例提供的电池单体的局部剖视示意图;
图31为图30所示的电池单体的结构爆炸图;
图32为本申请一些实施例的电池单体的装配图;
图33为本申请另一些实施例的电池单体的装配图。
附图标号:
用电装置1000,电池100,控制器200,马达300,
第一方向Z,第二方向X,第三方向Y,极柱的轴向R,
电池单体10,箱体20,第一箱体201,第二箱体202,
壳体11,壳身111,开口1110,安装壁1112,壳盖112,第一壳盖1121,第二壳
盖1122,安装孔113,
极柱12,容纳部121,第一容纳槽12110,第一端壁12111,第一沉槽12112,第
一侧壁12113,第二容纳槽12120,第二端壁12121,第二沉槽12122,第二侧壁12123,第一槽段12124,第二槽段12125,导向斜面12126,第三台阶面12127,穿孔12130,极柱内端面122,极柱外端面123,第一凹槽126,间隔部127,
第一盖板13;第一导电件131;第二凹槽1311;第二导电件132;应力释放槽133;
第二盖板14;
电芯组件2,第一端201,第二端202,活性物质涂覆部21,导电部22,
支架3,过孔311,引导槽312,定位部32,第一支架33,第二支架34,导向面35,
主体部36,延伸部37,周壁面370,第一台阶面371,第二台阶面372,限位凸部38,第一表面381,第二表面382,避空部391,第一注液导流槽392,容置槽393,
绝缘件4,连接印记401,
槽盖7。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案,因此只作为示例,而不能以此来限制本申请的保护范围。
除非另有定义,本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同;本文中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本申请;本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形,意图在于覆盖不排他的包含。
在本申请实施例的描述中,技术术语“第一”“第二”等仅用于区别不同对象,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中,“多个”的含义是两个以上,除非另有明确具体的限定。
在本文中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是,本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中,术语“和/或”仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中,相同的附图标记表示相同的部件,并且为了简洁,在不同实施例中,省略对相同部件的详细说明。应理解,附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸,以及集成装置的整体厚度、长宽等尺寸仅为示例性说明,而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
在本申请实施例的描述中,除非另有明确的规定和限定,技术术语“安装”“相连”“连接”“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;也可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请实施例中的具体含义。
本申请中,电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等,本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等,本申请实施例对此也不限定。电池单体一般按封装的方式分成三种:柱形电池单体、方形电池单体和软包电池单体,本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体,以提供更高的电压和容量的单一的物理模块。例如,本申请中所提到的电池可以为电池模组或电池包等。电池模组一般包括多个电池单体。电池包一般包括箱体和设置于箱体内的一个或多个电池单体,或者,电池包包括箱体和设置于箱体内的一个或多个电池模组,箱体可以避免液体或其他异物影响电池单体的充电或放电。
示例性地,电池单体通常可以包括壳体、电极组件和电解液,壳体用于容纳电极组件和电解液,壳体上设有至少一个正极极柱和至少一个负极极柱。电极组件由正极极片、负极极片和隔离膜叠片或卷绕形成。
其中,正极极片一般可以包括正极集流体和正极活性物质层,正极活性物质层直接或间接涂覆于正极集流体上,未涂覆正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体,未涂覆正极活性物质层的正极集流体作为正极极耳片,多个正极极耳片层叠在一起并与正极极柱形成电连接。负极极片一般可以包括负极集流体和负极活性物 质层,负极活性物质层直接或间接涂覆于负极集流体上,未涂覆负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体,未涂覆负极活性物质层的负极集流体作为负极极耳片,多个负极极耳片层叠在一起并与负极极柱形成电连接。隔离膜的材质不限,例如可以为聚丙烯或聚乙烯等。
同时,电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。以锂离子电池为例,正极集流体的材料可以为铝,正极活性物质层的材料可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等,负极集流体的材料可以为铜,负极活性物质层的材料可以为碳或硅等。在充放电过程中,Li+在两个电极之间往返嵌入和脱嵌:充电时,Li+从正极脱嵌,经过电解质嵌入负极,负极处于富锂状态;放电时则相反。
目前,从市场形势的发展来看,动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统,而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具,以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大,其市场的需求量也在不断地扩增。
在相关技术的电池单体中,在制造时,在集流体上涂覆活性物质层然后进行裁切,获得由涂覆有活性物质层的集流体(记为活性物质涂覆部)和未涂覆活性物质层的集流体(记为极耳片)组成的极片,然后将正负极片和隔离膜按顺序层叠或卷绕获得电极组件,电极组件中多极耳片层叠设置形成极耳部,极耳部本身形成导电部,或者极耳部与转接片连接形成导电部,活性物质涂覆部与导电部形成电芯组件。电池单体的壳盖上设置有极柱,电池单体在装配时,通常将电芯组件的导电部与壳盖上的极柱焊接之后,一起从壳身的开口入壳。
然而,发明人发现,在将电芯组件从开口装入壳体内的过程中,绝缘件以及电芯组件(特别是电芯组件的边缘)容易干涉或刮擦壳体,导致绝缘件以及电芯组件的极片损伤,从而使活性物质脱落,可能导致活性物质与极性相反的极片搭接导致内部短路;并且绝缘件在与壳体摩擦的过程中,容易发生褶皱,导致电芯组件与壳体的内壁面之间接触,使电芯组件出现腐蚀现象,影响电池单体的使用可靠性。
为了减少壳体刮伤电芯组件的现象发生,本申请将支架设置于活性物质涂覆部远离开口的一端,主体部在壳盖平面上的投影设置于活性物质涂覆部在壳盖平面上的投影内,之后一起入壳,在将带有支架的电芯组件装入壳体内的过程中,支架会优先接触壳身,一定程度上防止壳身靠近开口处的端部直接接触活性物质涂覆部,尽可能地减少壳体刮伤活性物质涂覆部现象的发生;将延伸部在壳盖平面上的投影设置于活性物质涂覆部在壳盖平面上的投影外,可以在入壳过程中对活性物质涂覆部形成保护,降低活性物质涂覆部触碰壳体的概率,进一步减少壳体刮伤活性物质涂覆部现象的发生。通过设置支架减少壳体刮伤活性物质涂覆部现象的发生,以减小活性物质脱落的可能性,一定程度上防止脱落的活性物质与相反极性的极片搭接导致的内部短路,且一定程度上防止脱落的活性物质与壳体发生化学反应,进而导致壳体被腐蚀穿透,从而提高电池单体的使用可靠性。
本申请实施例公开的电池单体可以用于使用电池作为电源的用电装置或者使用电池作为储能元件的各种储能系统。用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中,电动玩具可以包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等,航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以本申请一实施例的一种用电装置为车辆为例,对本申请的实施例提供的电池单体、电池和用电装置的结构进行详细说明。
请参照图1,图1为本申请一些实施例提供的用电装置1000为车辆的结构示意图。车辆可以为燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆设置有电池100,电池100可以设置在车辆的底部或头部 或尾部。电池100可以用于车辆的供电,例如,电池100可以作为车辆的操作电源。车辆还可以包括控制器200和马达300,控制器200用来控制电池100为马达300供电,例如,用于车辆的启动、导航和行驶时的工作用电需求。在本申请一些实施例中,电池100不仅可以作为车辆的操作电源,还可以作为车辆的驱动电源,代替或部分地代替燃油或天然气为车辆提供驱动动力。
请参照图2,图2为本申请一些实施例提供的电池100的结构爆炸图。电池100包括箱体20和多个电池单体10,电池单体10容纳于箱体20内。其中,箱体20用于为电池单体10提供容纳空间,箱体20可以采用多种结构。在一些实施例中,箱体20可以包括第一箱体201和第二箱体202,第一箱体201与第二箱体202相互盖合,第一箱体201和第二箱体202共同限定出用于容纳电池单体10的容纳空间。第二箱体202可以为一端开口的空心结构,第一箱体201可以为板状结构,第一箱体201盖合于第二箱体202的开放侧,以使第一箱体201与第二箱体202共同限定出装配空间;或者,第一箱体201和第二箱体202还可以均为一侧开放的空心结构(例如图2所示),第一箱体201的开口侧盖合于第二箱体202的开口侧。当然,第一箱体201和第二箱体202形成的箱体20可以是多种形状,比如,圆柱体、或长方体等。
在电池100中,多个电池单体10之间可串联或并联或混联,混联是指多个电池单体10中既有串联又有并联。多个电池单体10之间可直接串联、并联或混联在一起,再将多个电池单体10构成的整体容纳于箱体20内;或者,电池100也可以是多个电池单体10先串联、并联或混联组成电池模组形式,多个电池模组再串联、并联或混联形成一个整体,并容纳于箱体20内。电池100还可以包括其他结构,例如,电池100还可以包括汇流部件,用于实现多个电池单体10之间的电连接。
请参照图3,图3为本申请一些实施例提供的电池单体10的示意图,在本申请的实施例中,电池单体10呈长方体,且电池单体10的高度方向为第一方向Z,电池单体10的长度方向为第二方向X,电池单体10的厚度方向为第三方向Y。第一方向Z、第二方向X和第三方向Y两两相互垂直。当然,在本申请的其他实施例中,电池单体10还可以呈圆柱体、扁平体或其它形状等,本实施例不做限定。
请参照图4和图5,图4为本申请一些实施例的电池单体的结构分解图。图5为本申请一些实施例的电池单体的结构剖视图。在本申请的实施例中,电池单体10包括有壳体11、电芯组件2、支架3以及绝缘件4。
其中,壳体11的形状随电池单体10的种类调整,且本申请的实施例的电池单体10的种类不限,例如,当电池单体10为方形电池时,壳体11为方形,当电池单体10为圆柱电池时,壳体11呈圆柱状,本申请的实施例均以壳体11为方形为例进行说明。同时,壳体11上设有极柱12,极柱12用于与电芯组件2电连接,以保证电池单体10充放电作业的正常进行。一般极柱的数量至少为两个,具体为至少一个正极极柱和至少一个负极极柱,例如当极柱的数量为两个时,一个为正极极柱,一个为负极极柱,二者分别与电芯组件2的正负输出位置电连接;再例如当极柱的数量为四个时,可两个为正极极柱,两个为负极极柱,此时两个正极极柱均与电芯组件2的正极输出位置电连接,两个负极极柱均与电芯组件2的负极输出位置电连接。壳体11上还可以设有用于在电池单体10的内部压力或温度达到阈值时泄放内部压力的泄压机构,泄压机构能在电池单体10内部压力或温度过高时进行泄压,以阻止热失控传递至其他电池单体10。
并且,在本申请的实施例中,壳体11具体包括壳身111和壳盖112。
壳身111为一端具有开口1110的半封闭结构,或者为两端均具有开口1110的环形结构。同时,壳身111可以是多种形状和多种尺寸的,例如长方体形、圆柱体形、六棱柱形等,壳身111的形状可以根据电芯组件2的具体形状和尺寸大小来确定。壳身111的材质可以是多种,比如,铜、铁、铝、不锈钢、铝合金、塑胶等,本申请实施例对此不作特殊限制。壳身111具有开口1110,开口1110可以为一个或者多个。
壳盖112是指盖合于壳身111的开口1110处以将电池单体10的内部环境隔绝于外部环境的部件。并且,壳盖112的数量与开口1110的数量一致,当开口1110数量为一个时,壳盖112的数量也为一个,且盖设于开口1110处,以封闭开口1110,当开口1110的数量为两个时,壳盖112的数量为两个,且分别盖设于两个开口1110处,以封闭对应开口1110。壳盖112和壳身111可以在其他部件入壳前先形成一个共同的连接面,当需要封装壳身111的内部时,再使壳盖112盖合壳身111。同时,壳盖112的形状可以与壳身111的形状相适应以配合壳身111。可选地,壳盖112可以由具有一定硬度和强度的材质(如铝合金)制成,这样,壳盖112在受挤压碰撞时就不易发生形变,使电池单体10能够具备更高的结构强度,安全性能也可以有所提高。壳盖112上可以设置有如极柱12等的功能性部件。壳盖112的材质也可以是多种的,比如,铜、铁、铝、不锈钢、铝合金、塑胶等,本申请实施例对此不作特殊限制。
壳体11上设置有极柱12,且极柱12的数量为多个,多个极柱12可以均设置在壳身111上,也可以均设置在壳盖112上,还可以一部分设置在壳身111上,另一部分设置在壳盖112上。本申请的以下实施例均以壳身111为方形,壳身111的开口1110的数量为一个,且极柱12的数量为两个,分别为正极柱和负极柱,两个极柱12均设置于壳身111与开口1110相对的壁体上为例进行说明。当然,在本申请的其他实施例中,壳身111的形状,开口1110和壳盖112的数量、极柱12的数量、极柱12的位置均能根据需求进行调整,本申请的实施例不做限定。
在本申请的实施例中,电芯组件2包括活性物质涂覆部21和导电部22,活性物质涂覆部21设于壳体11内,活性物质涂覆部21为电芯组件2中涂覆有活性物质的部分,能在电池单体10充放电过程中辅助进行金属离子的脱嵌,导电部22为电连接活性物质涂覆部21和极柱12的金属结构,其未涂覆有活性物质,极柱12可通过导电部22与活性物质涂覆部21电连接,以使电池单体10充放电作业能够进行。导电部22可以由极耳片本身形成,也可以由极耳片与转接片连接之后形成。
活性物质涂覆部21分为正极活性物质涂覆部和负极活性物质涂覆部,正极活性物质涂覆部包括正极集流体涂覆有正极活性物质层的部分,负极活性物质涂覆部包括负极集流体涂覆有负极活性物质层的部分。导电部22分为正极导电部和负极导电部,正极导电部电连接正极活性物质涂覆部和正极极柱,负极导电部电连接负极活性物质涂覆部和负极极柱。
在本申请的实施例中,请再次参照图4和图5,支架3设置于活性物质涂覆部21远离开口1110的一端,并且支架3与电芯组件2配合。在壳身111的开口1110为一个的实施例中,在将带有支架3的电芯组件2装入壳体11内的过程中,支架3先从壳身111的开口1110处进入壳身111内,随后活性物质涂覆部21进入壳身111,电芯组件2在壳身111内安装到位之后,支架3位于壳身111的与其开口1110相对的壁和活性物质涂覆部21的远离开口1110的一端。在壳身111的开口1110为两个的实施例中,两个开口1110可以分别为相对设置的第一开口和第二开口,在将带有支架3的电芯组件2装入壳体11内的过程中,支架3先从壳身111的第一开口处进入壳身111,并朝第二开口移动,随后活性物质涂覆部21进入壳身111,电芯组件2在壳身111内安装到位之后,支架3位于第二开口处。
绝缘件4包裹活性物质涂覆部21,绝缘件4可以提升活性物质涂覆部21与壳体11之间的绝缘可靠性,减少或阻止活性物质涂覆部21与壳体11接触造成壳体11被腐蚀的情况发生,减少因壳体11腐蚀所造成的电解液的漏液问题,提升电池单体10的可靠性。
请再次参照图4和图5,支架3具有主体部36和延伸部37,延伸部37设于主体部36周侧,主体部36在壳盖112平面上的投影位于活性物质涂覆部21在壳盖112平面上的投影内,延伸部37在壳盖112平面上的投影位于活性物质涂覆部21在壳盖112平面上的投影外。也就是说,沿垂直于壳盖112的方向,支架3在壳盖112平面上的投影至少部分超出活性物质涂覆部21在壳盖112平面上的投影。
其中,支架3可以为板状结构,支架3可以设置在活性物质涂覆部21的有导电部 22的一侧,支架3上可以设置用于避让导电部22的避让结构(例如避让凹槽、或者下述的过孔311等),支架3还可以设置在活性物质涂覆部21的无导电部22的一侧,这样支架3无需设置用于避让导电部22的避让结构。
当支架3设置在活性物质涂覆部21的有导电部22的一侧时,支架3可以与极柱12相对设置,即支架3和极柱12位于活性物质涂覆部21的同一侧,支架3可以设置在极柱12和活性物质涂覆部21之间。当支架3设置在活性物质涂覆部21的无导电部22的一侧时,支架3与极柱12不相对设置。例如,支架3和极柱12位于活性物质涂覆部21的相邻两侧;又例如,支架3和极柱12位于活性物质涂覆部21的相对两侧。
需要说明的是,在本申请的实施例中,可以是在现有技术的电池单体的原有结构上,增加本申请实施例中的支架3,而不改变现有技术中的电池单体的其余结构(例如顶盖、上塑体、下塑体等结构);也可以是采用独立的支架3代替现有技术的电池单体的顶盖下方镶嵌的下塑件。
本申请实施例的技术方案中,将支架3设置于活性物质涂覆部21远离开口1110的一端,主体部36在壳盖112平面上的投影设置于活性物质涂覆部21在壳盖112平面上的投影内,之后一起入壳,在将带有支架3的电芯组件2装入壳体11内的过程中,支架3会优先接触壳身111,一定程度上防止壳身111靠近开口1110处的端部直接接触活性物质涂覆部21,尽可能地减少壳体11刮伤活性物质涂覆部21现象的发生;将延伸部37在壳盖112平面上的投影设置于活性物质涂覆部21在壳盖112平面上的投影外,可以在入壳过程中对活性物质涂覆部21形成保护,降低活性物质涂覆部21触碰壳体11的概率,进一步减少壳体11刮伤活性物质涂覆部21现象的发生。此外,通过设置支架3减少壳体11刮伤活性物质涂覆部21现象的发生,以减小活性物质脱落的可能性,一定程度上防止脱落的活性物质与相反极性的极片搭接导致的内部短路,且一定程度上防止脱落的活性物质与壳体11发生化学反应,进而导致壳体11被腐蚀穿透,从而提高电池单体10的使用可靠性。
在一些实施例中,延伸部37位于主体部36沿预设方向相对的两侧,预设方向平行于壳盖112平面。示例地,参照图4,电池单体10的横截面形状可以为长方形,电池单体10的高度方向为第一方向Z,电池单体10的长度方向为第二方向X,壳盖112设置在壳体11的高度方向的一端,延伸部37位于主体部36沿第二方向相对的两侧。当然,电池单体10的横截面形状不限于长方形,还可以为圆形等,在此不做限定。
在上述技术方案中,将延伸部37设置在主体部36沿预设方向相对的两侧,可以防止活性物质涂覆部21的相对两侧边缘触碰到壳体11,避免壳体11刮伤活性物质涂覆部21的相对两侧边缘。
在一些实施例中,延伸部37为环绕主体部36的环形结构。也就是说,支架3在壳盖112平面上的投影边缘均超出活性物质涂覆部21在壳盖112平面上的投影。如此设置,支架3可以对活性物质涂覆部21的一端的外缘形成保护,防止活性物质涂覆部21朝向支架3的一侧外缘触碰壳体11,避免壳体11刮伤活性物质涂覆部21的现象发生,进一步提高电池单体10的使用可靠性。
请再次参照图5,并进一步参照图6,图6为图5中所示的电池单体10在A处的放大图。支架3背向壳盖112的边缘具有导向面35,也就是,支架3背向壳盖112的一侧表面的周边部分。具体到图6,支架3背向壳盖112的边缘至少包括延伸部37背向主体部36的一侧与背向壳盖112的一侧的连接位置。
示例地,导向面35可以包括斜面。具体地,支架3的背向电芯组件2的一侧边缘可以设置倒角,这里的“倒角”指的是通过切削等工艺将支架3的棱角加工出一定的斜面,便于支架3装入壳体11内。示例地,导向面35可以包括弧面。弧面同样可以在支架3装入壳体11内的过程中,起到自动导向作用。示例地,导向面35可以包括弧面和斜面。当然,导向面35也可以为其他异形面,在此不做限定。
在将带有支架3的电芯组件2装入壳体11内的过程中,导向面35可以起到导向作用,使支架3可以顺利装入壳身111内,提高装配效率。
根据本申请的一些实施例,支架3与电芯组件2卡接或者粘接。
具体地,在支架3与电芯组件2卡接的实施例中,支架3上可以设置安装槽,活性物质涂覆部21远离开口1110的一端配合于安装槽内,实现将活性物质涂覆部21远离开口1110的一端与支架3卡接的目的,连接结构简单、操作方便。当然,支架3与电芯组件2的卡接方式不限于上述结构。在支架3与电芯组件2粘接的实施例中,可以在活性物质涂覆部21远离开口1110的一端与支架3之间设置连接胶,也可以在活性物质涂覆部21的侧壁与支架3之间设置连接胶,实现活性物质涂覆部21远离开口1110与支架3粘接的目的,当然连接胶的设置位置不限于上述位置。
需要说明的是,支架3与电芯组件2之间的连接方式不限于上述结构,具体可以根据实际情况进行选择,将支架3与电芯组件2连接一起,一定程度上防止支架3在入壳之前脱落,从而提高电池单体10的产品优率,支架3与电芯组件2一起入壳,既可以对电芯组件2形成保护,保证电芯组件2可以顺利且安全入壳,又可以起到绝缘作用。
请参照图7和图8,图7为本申请一些实施例的电池单体10的主视图。图8为本申请另一些实施例的电池单体10的主视图。支架3的一侧设有限位凸部35,限位凸部35与活性物质涂覆部21卡接。
示例地,限位凸部35可以设于延伸部37,限位凸部35可以设于延伸部37靠近壳盖112的一侧,即限位凸部35由延伸部37靠近壳盖112的表面向壳盖112凸出设置而形成;限位凸部35也可以设于延伸部37背离主体部36的一侧,即限位凸部35的一端与延伸部37背离主体部36的一侧连接,限位凸部35的另一端朝靠近壳盖112的方向延伸,且超出主体部36靠近壳盖112的端面。
示例地,限位凸部35可以设于主体部36,限位凸部35可以设于主体部36靠近壳盖112的一侧,即限位凸部35由主体部36靠近壳盖112的表面向壳盖112凸出设置而形成。
为了方便理解,可以定义活性物质涂覆部21具有相对设置的第一端201和第二端202,限位凸部38止挡于活性物质涂覆部21的靠近其第一端201的侧壁外侧,在将带有支架3的电芯组件2装入壳体11内的过程中,带有支架3的活性物质涂覆部21的第一端201先进入壳体11内,随着装配过程的进行,活性物质涂覆部21的第一端201在壳体11内逐渐远离开口1110,在装配过程中,限位凸部38位于活性物质涂覆部21的侧壁与壳体11之间,当电芯组件2和支架3在壳体11内安装到位之后,支架3位于壳体11的与其开口1110相对的壁和活性物质涂覆部21的第一端201之间。
如此设置,限位凸部38可以约束活性物质涂覆部21的一端,降低活性物质涂覆部21的外层发生蓬松的概率,还对活性物质涂覆部21的一端形成保护,减少活性物质涂覆部21的一端触碰壳体11的问题,由此减少壳体11刮伤活性物质涂覆部21的现象发生。同时,支架3通过限位凸部38与活性物质涂覆部21卡接,一定程度上防止支架3在入壳之前脱落,从而提高电池单体10的产品优率。
请再次参照图7,限位凸部38形成环形凸部,环形凸部沿电芯组件2的周向延伸。
也就是说,限位凸部38可以为一体式结构,并且限位凸部38套设在电芯组件2的外侧,这样,限位凸部38可以在电芯组件2的周向上对电芯组件2进行约束,更有效地降低电芯组件2的外层发生蓬松的概率,还对电芯组件2的一端形成保护,减少电芯组件2的一端触碰壳体11的问题,由此减少壳体11刮伤电芯组件2的现象发生。
请再次参照图8,限位凸部38可以包括多个,多个限位凸部38在电芯组件2的周向上间隔排布,相邻两个限位凸部38之间具有间隙,如此设置,限位凸部38在可以约束和保护电芯组件2的基础上,既可以减少材料,降低成本,又可以便于支架3与电芯组件2的装配。
当然,多个限位凸部38的排布方式并不限于上述情况,具体可以实际需要进行选择。其中,限位凸部38与电芯组件2的侧壁贴合;或者,限位凸部38与电芯组件2的侧壁之间具有间隙。也就是说,限位凸部38可以与电芯组件2的侧壁接触,也可以与电芯组件2的侧壁不接触,限位凸部38对电芯组件2的侧壁进行止挡,以降低电芯组件2的外层发生蓬松的概率,还对电芯组件2的侧壁形成保护,减少电芯组件2的一端触碰壳体11的问题。
请参照图9,图9为本申请一些实施例的电池单体10的局部结构剖视图。限位凸部38的朝向活性物质涂覆部21的一侧表面可以包括第一表面381,第一表面381与活性物质涂覆部21的侧壁贴合,第一表面381可以约束电芯组件2,以降低活性物质涂覆部21的外层发生蓬松的概率,还对活性物质涂覆部21的侧壁形成保护,减少活性物质涂覆部21的一端触碰壳体11的问题。
请参照图10,图10为本申请另一些实施例的电池单体10的局部结构剖视图。限位凸部38的朝向活性物质涂覆部21的一侧表面可以包括第二表面382,第二表面382与活性物质涂覆部21之间的距离沿支架3指向开口1110的方向逐渐增大,也就是说,第二表面382沿远离限位凸部38的根部和活性物质涂覆部21的侧壁的方向倾斜延伸,例如,第二表面382可以为斜面或者弧面。
如此设置,第二表面382可以对活性物质涂覆部21的侧壁进行止挡,以降低电活性物质涂覆部21的外层发生蓬松的概率,还对活性物质涂覆部21的侧壁形成保护,此外,第二表面382可以起到导向作用,便于装配,可以提高电芯组件2与支架3的组装效率。请参照图11,图11为本申请又一些实施例的电池单体10的局部结构剖视图。
请参照图11,图11为本申请又一些实施例的电池单体10的局部结构剖视图。限位凸部38的朝向活性物质涂覆部21的一侧表面可以包括第一表面381和第二表面382,第一表面381与活性物质涂覆部21的侧壁贴合,第二表面382与活性物质涂覆部21之间的距离沿支架3指向开口1110的方向逐渐增大,第一表面381位于限位凸部38的根部与第二表面382之间。
具体地,第一表面381的轮廓线可以为沿支架3的高度方向竖直延伸的直线,第二表面382的轮廓线可以为沿支架3的高度方向倾斜设置的斜线,如此设置,既可以对活性物质涂覆部21起到很好的约束作用,有效地降低活性物质涂覆部21的外层发生蓬松的概率,又可以便于装配,提高电芯组件2与支架3的装配效率。
请参照图12,图12为本申请再一些实施例的电池单体的局部结构剖视图。支架3的朝向电芯组件2的一侧具有避空部391,用于避让电芯组件2朝向支架3的一侧的外缘,降低支架3压伤电芯组件2的风险。
具体地,在支架3具有限位凸部38的实施例中,支架3在成型时,限位凸部38的靠近支架3中心的一侧根部可能出现圆角结构,通过设置避空部391,可以去除限位凸部38和主体部36之间的圆角结构,防止圆角结构压伤电芯组件2的外缘。其中,避空部391可以为朝向电芯组件2开口的凹槽,例如,凹槽可以为环形凹槽,再例如,凹槽可以包括多个且多个凹槽间隔布置,凹槽的形状可以根据实际情况进行选择。又例如,避空部391也可以为对电芯组件2形成避让的避让斜面或者避让弧面。在本申请的其他实施例中,支架3的朝向电芯组件2的一侧也可以与电芯组件2完全接触,即支架3的朝向电芯组件2的一侧没有避空结构。
请参照图13-图15,图13为本申请一些实施例的电池单体10的电芯组件2与支架3、绝缘件4装配后的结构剖视图。图14为图13中所示的电池单体10在B处的放大图。图15为本申请另一些实施例的电池单体10的电芯组件2与支架3、绝缘件4装配后的结构剖视图。电池单体10还可以包括绝缘件4,绝缘件4包裹于活性物质涂覆部21,并且绝缘件4与延伸部37连接。其中,绝缘件4与支架3可以粘接相连,也可以热熔连接,当然,绝缘件4与支架3还可以采用其他方式连接。
带有支架3的电芯组件2在壳体11内安装到位的状态下,绝缘件4位于活性物质涂覆部21与壳体11之间,可以起到绝缘作用,并对电芯组件2形成保护,防止电芯组件2与电池单体10的壳体11搭接,有效地减少电芯组件2因裸漏而发生腐蚀的现象;将绝缘件4与延伸部37连接,以便于固定绝缘件4。
请再次参照图13和图14,绝缘件4与延伸部37的周壁面370连接。其中,“延伸部37的周壁面370”是指延伸部37沿其高度方向(图中的上下方向)延伸的外壁面。示例地,若支架3为长方形板件,支架3的周壁面370包括四个侧壁面,每个侧壁面与支架3的高度方向(图中的上下方向)平行,若支架3为圆柱形,支架3的周壁面370为圆柱面。当然,支架3也可以为不规则结构。
具体地,在绝缘件4与支架3热熔连接的实施例中,绝缘件4与支架3的周壁面370热熔连接形成连接印记401,连接印记401可以为沿支架3的周向延伸的环形结构,也可以为包括多个在支架3的周向间隔布置的连接结构。
更具体地,在电芯组件2为长方体的实施例中,支架3可以为形状对应的长方形板件,绝缘件4包裹电芯组件2的四个侧壁,并且绝缘件4与支架3的四个侧壁面热熔连接,绝缘件4与支架3的每个侧壁面热熔连接形成连接印记401,提高绝缘件4与支架3的连接可靠性。
在上述技术方案中,通过将绝缘件4与支架3的周壁面370连接,可以提高绝缘件4与支架3的连接可靠性,降低绝缘件4脱落的风险。
请再次参照图9-图12,周壁面370具有第一台阶面371和第二台阶面372,第二台阶面372位于第一台阶面371靠近壳盖112的一侧,第二台阶面372相比第一台阶面371更靠近活性物质涂覆部21,绝缘件4连接于第二台阶面372。
在上述技术方案中,将周壁面370设置为包括第一台阶面371和第二台阶面372,可以为绝缘件4提供了安装空间,将绝缘件4连接于第二台阶面372,可以降低绝缘件4与第二台阶面372之间的连接结构因刮擦到壳体11而发生脱落的风险,进一步提高了绝缘件4与支架3之间的连接可靠性。
在一些实施例中,第一台阶面371相比绝缘件4的外侧面更远离活性物质涂覆部21。也就是说,第一台阶面371超出支架3与绝缘件4的连接位置。在将带有支架3的电芯组件2装入壳体11内的过程中,支架3先从开口1110进入壳身111内,包裹有绝缘件4的活性物质涂覆部21后从开口1110进入壳身111内。
由于第一台阶面371相比绝缘件4的外侧面更远离活性物质涂覆部21,因此在入壳过程中,第一台阶面371既可以保护绝缘件4的边缘和活性物质涂覆部21的边缘,减少绝缘件4的边缘以及活性物质涂覆部21的边缘刮擦到壳体11内壁的现象发生,又可以对绝缘件4与第二台阶面372的连接位置进行保护,降低绝缘件4与第二台阶面372之间的连接结构因刮擦到壳体11而发生脱落的风险,进一步提高了绝缘件4与支架3之间的连接可靠性。
请再次参照图15,电池单体10还包括绝缘件4,绝缘件4包裹活性物质涂覆部21,并且绝缘件4与主体部36远离壳盖112的表面连接。
通过将绝缘件4的至少一部分与主体部36的远离电芯组件2的壁面连接,一方面,在将带有支架3的电芯组件2装入壳体11内的过程中,壳体11不会刮擦到绝缘件4的边缘,也不会刮擦到绝缘件4与主体部36之间的连接位置,并且二者的连接位置不容易在入壳过程中被拉开,能减少在电芯组件2入壳过程中绝缘件4的窜动和滑移,可以提高绝缘件4与支架3之间的连接可靠性,降低绝缘件4脱落的风险,进而可以降低电芯组件2因裸漏使壳体11被腐蚀的风险,降低电芯组件2自身失效的风险,且降低漏液的风险,继而能提高电池单体10的可靠性和稳定性;另外,将绝缘件4的至少一部分与主体部36的远离电芯组件2的壁面连接,还可以将绝缘件4的尺寸设计的更长,可以适用不同尺寸的电芯组件2,具有更高的兼容能力,可制造性能够得到提升。另一方面,支架3和电芯组件2在壳 体11内安装到位之后,绝缘件4压在壳体11的与开口1110相对的壁面和主体部36之间,能进一步降低绝缘件4脱落的风险,降低电芯组件2因裸漏而失效的风险,同时降低壳体11被腐蚀的风险,提高电池单体10的可靠性和稳定性。
根据本申请一些可选的实施例,绝缘件4与主体部36远离电芯组件2的壁面的周向呈环形连续连接。这里的环形连接是指绝缘件4与主体部36的连接位置沿主体部36的周向延伸,以形成封闭的环形。
如此设置,可以增加绝缘件4与支架3的连接面积,以提高绝缘件4与支架3之间在支架3的周向上的连接可靠性和稳固性,进一步降低绝缘件4脱落的风险,进而提高电芯组件2入壳的可靠性,保证电池单体10的可靠性和稳定性。
在本申请的实施例中,绝缘件4与支架3远离电芯组件2的壁面的周向呈环形间隔连接,也就是说,绝缘件4与支架3的连接位置为多个,并且多个连接位置在支架3的周向间隔排布。在保证绝缘件4与支架3之间在支架3的周向上的连接可靠性和稳固性的基础上,可以节省连接材料,降低材料成本,简化连接步骤,提高生产效率。
当然,在本申请的其他实施例中,绝缘件4与支架3远离电芯组件2的壁面还可以呈周向呈环形连续连接。这里的环形连接是指绝缘件4与支架3的连接位置沿支架3的周向延伸,以形成封闭的环形。如此设置,可以增加绝缘件4与支架3的连接面积,以提高绝缘件4与支架3之间在支架3的周向上的连接可靠性和稳固性,进一步降低绝缘件4脱落的风险,进而提高电芯组件2入壳的可靠性,保证电池单体10的可靠性和稳定性。
另外,在本申请的其他实施例中,绝缘件4与支架3的连接位置可以集中设置在支架3的相对两侧、相邻两侧或者多侧,具体可以根据电芯组件2和支架3的实际形状进行选择,在此不做限定。
请再次参照图15,在本申请的实施例中,绝缘件4与支架3的连接方式可为热熔连接,且绝缘件4与支架3远离电芯组件2的壁面热熔连接形成连接印记401,连接印记401的位置不受空间限制,与相关技术相比,连接印记401的面积可以设计更大,使连接更牢固,降低绝缘件4脱落的风险。
具体地,在本申请的实施例中,连接印记401的数量为多个,多个连接印记401绕支架3远离电芯组件2的壁面的周向间隔布置。在本申请的其他实施例中,连接印记401也可以绕支架3远离电芯组件2的壁面的周向环形延伸,以使绝缘件4与支架3的连接更牢固,以充分提高绝缘件4与支架3的连接可靠性,降低绝缘件4脱落的风险。
需要说明的是,在本申请的实施例中,连接印记401的形状可以为长方形、圆形或者椭圆形等,也可以为不规则形状。多个连接印记401的排布方式可以根据电芯组件2和支架3的实际形状进行选择。例如,当电芯组件2和支架3的横截面形状为正方形或者长方形时,多个连接印记401可以分布在支架3的四个边沿附近的位置,也可以集中分布在支架3的相对两侧边沿附近的位置。再例如,当电芯组件2和支架3的横截面形状为圆形时,多个连接印记401可以绕支架3远离电芯组件2的壁面的周向均匀分布。
当然,多个连接印记401的分布形式不限于上述形式,并且相邻两个连接印记401的间距可以根据需要进行调整,可以适当增加连接印记401的数量,在保证绝缘件4与支架3的连接可靠性的基础上,节省材料,降低成本。
以电芯组件2为长方体为例进行说明,在本申请的实施例中,支架3可以为形状对应的长方形板件,支架3设置在电芯组件2的一个壁面,绝缘件4包裹电芯组件2周向剩余的五个壁面,以保证电芯组件2与壳体11之间的绝缘效果。同时,绝缘件4与支架3远离电芯组件2的壁面形成的连接印记401可以邻近支架3的周向边缘设置,且可邻近支架3周向的两个边沿、三个边沿或者四个边沿附近,绝缘件4与对应边沿附近连接形成的连接印记401的数量可以根据对应边沿的尺寸增加或减少,本申请的实施例均不做限定。
在上述技术方案中,一方面,采用热熔的方式连接,可方便绝缘件4与支架3配合,提高装配效率,以保证电芯组件2的入壳效率,节约装配和制造的成本;另一方面,无论 是连接印记401呈周向环形延伸,还是呈周向间隔布置,均能提高绝缘件4与支架3之间连接的牢固性,提高绝缘件4与支架3的连接的可靠性和稳定性,以充分降低绝缘件4脱落的风险;同时,周向间隔布置相较于周向环形延伸而言,还能在保证绝缘件4与支架3的连接可靠性的基础上,节省材料,降低成本。
请再次参照图13,并进一步参照图16和图17,图16为本申请一些实施例的电池单体10的支架3的结构示意图。图17为本申请另一些实施例的电池单体10的支架3的结构示意图。为了方便导电部22从活性物质涂覆部21靠近支架3的一侧与极柱12连接,在本申请的实施例中,导电部22与活性物质涂覆部21靠近主体部36的一侧连接,主体部36具有过孔311,导电部22穿过过孔311以与极柱12连接。
其中,过孔311的形状可以根据导电部22的形状进行选择。例如,导电部22需要伸入过孔311处的横截面形状为长条形,过孔311的形状则可以选择用方形、矩形、椭圆形、或长圆形等规则形状,也可以为不规则形状;再例如,导电部22需要伸入过孔311处的横截面形状为圆形,过孔311的形状则可以选择用圆形、方形、或长圆形等形状。
可以理解的是,导电部22的外表面与过孔311的孔壁可以直接接触,导电部22的外表面与过孔311的孔壁之间也可以具有间隙,在保证不损坏导电部22的基础上,使导电部22可以穿过过孔311即可。
在上述技术方案中,一方面,通过在主体部36上设置过孔311,使支架3可以起到收拢以及容纳导电部22的作用,方便导电部22与极柱12的连接,能提高电池单体10的装配可靠性和便捷性;另一方面,支架3收拢导电部22,可省去原本电池单体10中塑胶件的结构,能通过支架3和绝缘件4的配合实现整个活性物质涂覆部21与壳体11之间的绝缘,能有效地降低制造和生产成本。
当然,导电部22也可以设置在支架3的一侧,导电部22与支架3无配合关系。
在本申请的一些实施例中,支架3可为一体式结构,也可以为分体式结构。请参照图16,当支架3为一体式结构时,过孔311形成为贯穿支架3的通孔形式。由此,一体式结构的支架3便于加工,且支架3的可靠性较好,并且便于支架3与壳体组件1装配,提高装配效率和配合稳定性。可以理解的是,支架3如何加工可以根据支架3的材质具体选择。例如,当支架3为绝缘塑胶件时,可以采用注塑的方式获得一体式结构的支架3。
请参照图17,当支架3为分体式结构时,支架3可以包括单独成型的第一支架33和第二支架34,第一支架33与第二支架34之间限定出过孔311。
在本申请的实施例中,第一支架33和第二支架34均为长条板状结构,二者可以可拆卸连接,例如二者可插接或卡接配合,以方便装配。同时,第一支架33靠近第二支架34的一侧具有半孔结构,第二支架34靠近第一支架33也对应设置有形状适配的另一个半孔结构,第一支架33的半孔结构和第二支架34的半孔结构共同围成环形的过孔311。也即,第一支架33与第二支架34之间限定出过孔311。
在上述技术方案中,通过第一支架33和第二支架34的配合限定出过孔311,在支架3与电芯组件2装配时,无需将导电部22从过孔311的一端穿到另一端,而是可以将第一支架33和第二支架34在导电部22的位置拼合夹住导电部22,使得过孔311环绕导电部22,便于支架3与电芯组件2的装配,提高装配效率。
作为可选的方案,当过孔311的横截面为长条状时,第一支架33和第二支架34分置于过孔311的宽度方向上的两侧,例如,过孔311的宽度方向为左右方向,则第一支架33和第二支架34位于过孔311的左侧和右侧,便于第一支架33、第二支架34与导电部22的配合。
请参照图18,图18为本申请一些实施例提供的电池单体10的局部剖视示意图。主体部36的背离活性物质涂覆部21的一侧开设有容置槽393,容置槽393与过孔311连通,容置槽393用于容纳至少部分极柱12。
其中,容置槽393的形状可以与极柱12的形状相匹配。例如,极柱12的横截面形状为长条形时,容置槽393的形状则可以选择用方形、矩形、椭圆形、或长圆形等规则形状,也可以为不规则形状;再例如,极柱12的横截面形状为圆形,容置槽393的形状则可以选择用圆形、方形、或长圆形等形状。
可以理解的是,极柱12的外表面与容置槽393的槽侧壁可以直接接触,极柱12的外表面与容置槽393的槽侧壁之间也可以具有间隙,在保证不损坏极柱12的基础上,使极柱12的至少一部分容纳于容置槽393即可。
在上述技术方案中,一方面,通过容置槽393容纳至少部分极柱12,使得整个电池单体10的结构更紧凑和可靠,利于实现整个电池100的能量密度的提高;另一方面,通过容置槽393的设置,还能通过支架3实现极柱12与壳体11的部分位置的绝缘,以进一步地提高电池单体10的稳定性与可靠性;另外,通过容置槽393容置极柱12,还能提高极柱12的稳定性与可靠性,以能更进一步地提高电池单体的稳定性与可靠性。
请再次参照图18,主体部36的背离活性物质涂覆部21的一侧设置有定位部32,定位部32围设在过孔311的周向,且向靠近极柱12的方向延伸。
在一些实施例中,定位部32可以为沿过孔311的周向延伸的环形凸台。在另一些实施例中,定位部32可以包括两个相对设置的凸台结构,两个凸台结构位于过孔311的相对两侧。举例而言,过孔311可以形成长形孔,两个凸台结构可以在长形孔的宽度方向上相对设置,每个凸台结构沿长形孔的长度方向延伸。
在上述技术方案中,通过设置定位部32,在支架3与极柱12的装配过程中,采用定位部32与过孔311配合,可以使支架3与极柱12实现定位安装,有利于提高电池单体10的装配效率,当导电部22从过孔311穿出,定位部32可以束缚、收拢、支撑导电部22,便于连接导电部22与极柱12,能提高电池单体10地装配效率和装配质量。
请再次参照图18,极柱12上设有容纳部121,导电部22的至少部分容纳于容纳部121内,定位部32的至少部分伸入容纳部121内,用于引导导电部22容纳于容纳部121内。也就是说,极柱12设置为空心结构。
在上述技术方案中,一方面,通过将极柱12设置为空心结构,且将定位部32与空心结构配合,能引导导电部22与极柱12连接,能提高连接可靠性,且保证装配效率和质量;另一方面,导电部22能容纳在容纳部121内,提高了导电部22的装配效率,还能节约导电部22占用空间,充分利用电池单体10的空间,使得支架3与极柱12之间、支架3与导电部22之间的配合均更紧密和可靠,使得电池单体10的结构跟紧凑,更利于电池单体10的能量密度的提升。此外,定位部32与容纳部121配合,可以使支架3与极柱12实现定位安装,有利于提高电池单体10的装配效率。
请再次参照图18,并进一步参照图19,图19为本申请一些实施例的电池单体10的支架3的结构剖视图。主体部36的朝向活性物质涂覆部21的一侧形成有引导槽312,引导槽312与过孔311连通,引导槽312容纳至少部分导电部22,沿主体部36靠近活性物质涂覆部21的方向,引导槽312的横截面积逐渐增大。
具体地,引导槽312的槽壁可以为从内至外朝靠近活性物质涂覆部21的方向延伸斜面或者弧面,这里的“内”是指靠近引导槽312的中心的位置,相反,这里的“外”是指远离引导槽312的中心的位置,即靠近引导槽312的边缘的位置。
引导槽312既可以容纳导电部22,又可以对导电部22进行避让,避免压伤导电部22,还可以降低导电部22发生蓬松、翻折的概率,减少冗余。
请参照图20和图21,图20为本申请一些实施例的电池单体10的支架3的俯视图。图21为本申请另一些实施例的电池单体10的支架3的俯视图。在一些实施例中,支架3上具有至少一个第一注液导流槽392,第一注液导流槽392位于支架3的朝向活性物质涂覆部21的一侧。
注液时,电解液可以沿着第一注液导流槽392流动,为电解液提供浸润路径,且第 一注液导流槽392可以增加电解液的流动性,提高注液速度,降低化成静置时间。此外,第一注液导流槽392的设置增加了电解液和活性物质涂覆部21的接触面积,可以减少活性物质涂覆部21浸润不良的问题。
其中,至少一个第一注液导流槽392连通引导槽312,进入的壳体11内的电解液,可以沿着第一注液导流槽392朝向引导槽312流动,使电解液可以流动至预定位置,进一步增加了电解液和活性物质涂覆部21的接触面积。
请再次参照图20,在支架3为一体式结构且壳体11上设置两个极柱12的实施例中,第一注液导流槽392的两端可以分别与两个极柱12位置对应,并且第一注液导流槽392的两端分别两个引导槽312连通,电解液可以沿着第一注液导流槽392朝两个引导槽312流动。
请再次参照图21,在支架3为分体式结构且壳体11上设置两个极柱12的实施例中,支架3可以包括单独成型的第一支架33和第二支架34,第一支架33与第二支架34之间限定出过孔311,第一支架33和第二支架34上分别设有至少一个第一注液导流槽392,每个第一注液导流槽392的两端可以分别与两个极柱12位置对应,并且第一注液导流槽392的两端分别两个引导槽312连通,电解液可以沿着第一注液导流槽392朝两个引导槽312流动。
在一些实施例中,支架3上还可以根据需求设置第二注液导流槽(图中未示出),第二注液导流槽位于支架3的背向活性物质涂覆部21的一侧。通过这样设置,使得在注液时,电解液可以沿着第一注液导流槽392和/或第二注液导流槽流动,为电解液提供浸润路径,且可以增加电解液的流动性,提高注液速度,降低化成静置时间。
需要说明的是,在本申请的实施例中,第一注液导流槽392和/或第二注液导流槽的深度大于或者等于0.1mm,例如,第一注液导流槽392和/或第二注液导流槽的深度可以为0.1mm、0.2mm、0.5mm等,具体可以根据实际需要进行选择。
请再次参照图17,在本申请的实施例中,导电部22与活性物质涂覆部21靠近支架3的一侧连接,极柱12上设有容纳部121,导电部22的至少部分容纳于容纳部121内,用于引导导电部22容纳于容纳部121内,以方便导电部22与极柱12电连接配合。也就是说,极柱12设置为空心结构。
其中,至少部分的含义为导电部22可全部容纳在容纳部121内,也可以导电部22的局部容纳在容纳部121内。由于极柱12设置有容纳部121,容纳部121的空心结构可一定程度减轻极柱12的重量,以能提高电池单体10和电池100的重量能量密度。同时,通过将极柱12设置为空心结构,且将定位部32与空心结构配合,能引导导电部22与极柱12连接,能提高连接可靠性,且保证装配效率和质量;另一方面,导电部22能容纳在容纳部121内,提高了导电部22的装配效率,还能节约导电部22占用空间,充分利用电池单体10的空间,使得支架3与极柱12之间、支架3与导电部22之间的配合均更紧密和可靠,使得电池单体10的结构跟紧凑,更利于电池单体10的能量密度的提升。
更具体地,将导电部22的局部或者全部容纳于容纳部121内,使得导电部22位于容纳部121内的部分可以占用极柱12内的空间,可以减少导电部22在壳体11内的占用空间,当壳体11的尺寸固定的情况下,壳体11内可以节省出一些空间,以容纳更大尺寸的活性物质涂覆部21,提升电池单体10的体积能量密度。例如,当导电部22从活性物质涂覆部21的靠近极柱12的一侧引出时,可以节省导电部22在活性物质涂覆部21与极柱12之间的空间占用,可以增大活性物质涂覆部21在导电部22引出方向上的尺寸,减小活性物质涂覆部21与极柱12之间的间距,提升电池单体10的能量密度。
同时,通过将导电部22的至少部分容纳于容纳部121内,使得电池单体10自身所占用空间可以减小,使得相同体积的电池100可容纳更多数量的电池单体10,还能提升电池100的体积能量密度;另外,将导电部22的至少部分容纳于容纳部121内,以 占用极柱12内的空间,可以在至少一定程度上减小导电部22在壳体11内的冗余,降低导电部22与活性物质涂覆部21之间短接的几率,降低电池单体10短路的几率,提高电池单体10和电池100的工作可靠性与稳定性。
需要说明的是,在本申请的实施例中,容纳部121的位置既可以位于极柱12朝向活性物质涂覆部21一侧,也可以位于极柱12背离活性物质涂覆部21一侧。
示例性地,请参照图22和图23,图22为本申请一些实施例提供的电池单体10的局部剖视示意图。图23为本申请一些实施例提供的电池单体10的局部剖视示意图。当容纳部121位于极柱12朝向活性物质涂覆部21一侧时,容纳部121包括第一容纳槽12110,极柱12朝向活性物质涂覆部21一侧的表面为极柱内端面122,第一容纳槽12110的槽口形成在极柱内端面122上,导电部22的至少部分容纳于第一容纳槽12110内。
示例性地,第一容纳槽12110为槽体,槽体为具有一定深度的槽状结构。例如,当极柱12设置在壳体11的上端壁,极柱内端面122为极柱12的下表面时,第一容纳槽12110形成为槽口向下敞开,槽壁向上凹陷的容纳槽。又例如,当极柱12设置在壳体11的下端壁,极柱内端面122为极柱12的上表面时,第一容纳槽12110形成为槽口向上敞开,槽壁向下凹陷的容纳槽。
在上述技术方案中,一方面,在极柱12上开设第一容纳槽12110可一定程度减轻极柱12的重量,以能提高电池单体10和电池100的重量能量密度;另一方面,由于第一容纳槽12110的槽口形成在极柱内端面122上,且极柱内端面122为极柱12的靠近活性物质涂覆部21一侧的表面,使得第一容纳槽12110可以朝向活性物质涂覆部21的方向敞开,进而方便导电部22伸入第一容纳槽12110内,提高装配效率。而且,此种形式的第一容纳槽12110便于加工,提高生产效率。
并且,第一容纳槽12110便于加工为具有较大的容积,可以容纳更多的导电部22;同时,由于第一容纳槽12110朝向活性物质涂覆部21的方向敞开,使得第一容纳槽12110还可以作为电解液的缓冲和暂存结构,使得壳体11内可容纳更多电解液,由于电池单体10充放电过程中会损耗电解液,因而当电解液更多时,可延长电池单体10的使用寿命;且也是因为第一容纳槽12110朝向活性物质涂覆部21的方向敞开,第一容纳槽12110也可以作为电芯组件2内部产气的容纳和缓冲结构,减少电池单体10的膨胀,提高电池单体10的可靠性和稳定性。
另外,由于第一容纳槽12110位于极柱12的内侧,外部的异物杂质不易进入第一容纳槽12110,可减少外部异物杂质对电芯组件2的影响,可提升电芯组件2工作的稳定性和可靠性,进而提高电池单体10和电池100的稳定性和可靠性。
请再次参照图22,在本申请的实施例中,极柱12与壳体11的连接方式不限,例如既可以为焊接,也可以为铆接。例如,当二者通过铆接的方式配合时,壳体11上具有安装孔113,极柱12铆接安装于安装孔113处。当然,可以理解的是,当二者通过焊接或其他方式配合时,壳体11上也可以设有安装孔113,以方便极柱12能通过安装孔113安装于壳体11,此处不做限定。
同时,第一容纳槽12110可以对应安装孔113的位置设置,或者说,在垂直于极柱12的轴向R的投影面上,第一容纳槽12110的正投影位于安装孔113的正投影范围内,使得第一容纳槽12110可以具有较大的深度,以容纳更多的导电部22,进而可以更大程度地减少导电部22在壳体11内的占用空间。
具体地,当壳体11上开设有安装孔113,极柱12安装于安装孔113时,沿极柱12的轴向R,第一容纳槽12110的深度H1大于或等于极柱内端面122到安装孔113的最小距离H2。
需要说明的是,第一容纳槽12110的具体形状不限,可以为规则形状,也可以为不规则形状,例如横截面为矩形、椭圆形、或跑道形的等截面柱形槽,或者横截面为矩形且截面 尺寸渐变的梯形槽,或者横截面为圆形且截面尺寸渐变的半球形槽,或者横截面为椭圆形且截面尺寸渐变的半椭球形槽等等。因此,第一容纳槽12110的深度H1指的是:第一容纳槽12110沿极柱12的轴向R的最大深度。
由于在极柱12的轴向R上,第一容纳槽12110的深度H1大于或等于极柱内端面122到安装孔113的最小距离H2,可以充分利用极柱12的体积,使得第一容纳槽12110具有较大的深度,有利于容纳更多的导电部22,进而可以更大程度地减少导电部22在壳体11内的占用空间,进一步提升电池单体10的能量密度,进一步减小导电部22在壳体11内的冗余;同时,由于第一容纳槽12110具有较大的深度,也可以容纳电芯组件2的产气,保证电池单体10的可靠性和稳定性,还可以容纳更多电解液,以能保证电池单体10的使用寿命。
请再次参照图22和图23,为了保证活性物质涂覆部21与极柱12电连接的稳定性和可靠性,在本申请的一些实施例中,导电部22与极柱12的电连接位置可以位于容纳部121形成的第一容纳槽12110的槽壁上。
示例性地,导电部22与极柱12可以通过焊接形成电连接,电连接位置为导电部22与极柱12的焊接位置。同时,导电部22与极柱12的焊接方式不限,例如可以为激光焊,且根据焊接部位的位置、角度、或结构等因素,可以选择垂直焊接、或倾斜焊接等,以及搭接焊、或封边焊等。在本申请的其他实施例中,导电部22与极柱12还可以通过其他方式代替焊接实现电连接,例如设置导电胶或导电钉等方式实现。为简化描述,后文以导电部22与极柱12焊接形成电连接,焊接位置即为导电部22与极柱12的电连接位置为例进行介绍。
具体地,极柱12具体包括第一端壁12111和第一侧壁12113,第一端壁12111位于第一侧壁12113的远离活性物质涂覆部21的一侧,第一端壁12111和第一侧壁12113围设形成第一容纳槽12110,导电部22与极柱12的电连接位置位于第一端壁12111和/或第一侧壁12113。也就是说,可以是导电部22与第一端壁12111和第一侧壁12113中的至少一个焊接。
在上述技术方案中,通过将导电部22与极柱12的电连接位置设置在第一端壁12111和第一侧壁12113中的至少一个上,使得第一容纳槽12110不但具有容纳导电部22的至少部分的作用,第一容纳槽12110的槽壁还具有与导电部22实现电连接的作用,可以简化极柱12的结构,便于极柱12的加工,而且可以简化导电部22的结构,减少导电部22的冗余,降低导电部22的成本。而且利用第一容纳槽12110的槽壁实现与导电部22的电连接,可以使得导电部22与极柱12电连接的区域可设置得相对较大,不但可以降低电连接的难度,而且可以提高电连接的可靠性与稳定性,进而提升电池单体10的性能。
此外,由于导电部22与极柱12的电连接位置位于第一容纳槽12110内,不但可以避免电连接位置凸出于极柱12的外部,占用极柱12之外的空间,而且可以使得电连接的位置获得极柱12的保护,提高导电部22与极柱12的电连接的可靠性与稳定性。
另外,在本申请的实施例中,第一端壁12111构造为并未开设穿孔的封闭结构,以使第一容纳槽12110与壳体11的外部空间隔绝,可以避免壳体11内的电解液从第一容纳槽12110漏出的问题。
请再次参照图22和图23,在一些可选实施例中,导电部22的局部形状与第一端壁12111的局部形状相匹配,且贴合设置并实现电连接,以使导电部22与第一端壁12111电连接的位置沿第一端壁12111的长度或宽度方向延伸。例如,当第一端壁12111为平面时,导电部22的局部也可以为平面并贴合于第一端壁12111,并对贴合的位置进行电连接,例如焊接。由此,可以提升电连接的面积,提升电连接的可靠性与稳定性。
另外,当导电部22与第一端壁12111的电连接为焊接时,由于第一端壁12111位于第一容纳槽12110的远离活性物质涂覆部21的一侧,便于进行焊接操作,例如可以从极柱12的远离活性物质涂覆部21的一侧进行焊接。
值得说明的是,第一端壁12111的形状不限,例如可以为平板状、弧形板状等。其中, 当第一端壁12111为平板状结构时,第一端壁12111与极柱12的轴向R呈夹角布置,例如可以是与极柱12的轴向R相垂直的平板结构,又例如还可以是与极柱12的轴向R不垂直的倾斜板状结构,但倾斜方向不限。
当然,在本申请的其他实施例中,导电部22与第一端壁12111电连接的位置,也可以并不是沿第一端壁12111的长度或宽度方向延伸的,例如还可以是离散设置的多个点,例如,导电部22具有间隔设置的多个部位分别与第一端壁12111焊接,这里不作赘述。
请参照图24,图24为本申请一些实施例提供的电池单体10的局部剖视示意图。当导电部22与第一端壁12111电连接时,可以在第一端壁12111上设置第一沉槽12112,第一沉槽12112的下沉方向为背离活性物质涂覆部21的方向。导电部22与第一端壁12111电连接的位置的至少部分位于第一沉槽12112内。示例性地,可以将导电部22的至少部分设置在第一沉槽12112内并与第一端壁12111用于限定第一沉槽12112的部位连接。
在上述技术方案中,一方面,可以利用第一沉槽12112实现对导电部22电连接位置的预定位和限位,不仅有利于找准位置实现电连接,提高生产效率,还利于提高导电部22的稳定性和可靠性,保证电池单体10充放电过程的稳定性和可靠性;另一方面,通过在第一端壁12111上设置第一沉槽12112,可以局部减薄第一端壁12111的局部的壁厚,不仅有利于进行焊接,还利于减轻极柱12的重量,提高电池单体10的重量能量密度。
请再次参照图23和图24,在本申请实施例中,极柱12还可以根据需求设置第一凹槽126,第一凹槽126位于极柱12远离活性物质涂覆部21的一侧,也即,极柱12的远离活性物质涂覆部21的一侧表面为极柱外端面123,第一凹槽126的槽口形成在极柱外端面123上。
可以理解的是,第一凹槽126为槽体,槽体为具有一定深度的槽状结构。并且,当极柱12设置在壳体11的上端壁,极柱外端面123为极柱12的上表面时,第一凹槽126形成为槽口向上敞开,槽壁向下凹陷(也即向靠近电芯组件2的方形凹陷)的第一凹槽。又例如,当极柱12设置在壳体11的下端壁,极柱外端面123为极柱12的下表面时,第一凹槽126形成为槽口向下敞开,槽壁向上凹陷(也即向远离电芯组件2的方形凹陷)的第一凹槽。
在上述技术方案中,一方面,由于极柱12设置有第一凹槽126,能进一步减轻极柱12的重量,以能提高电池单体10和电池100的重量能量密度;另一方面,第一凹槽126位于极柱12的外侧,即朝向极柱12的背离壳体11内部的一侧敞开,可以利用第一凹槽126容纳或安装电池100中电连接各个电池单体10的结构零部件,以充分利用极柱12内的空间,提高电池100的空间利用率和体积能量密度。
另外,由于极柱12上同时具有第一容纳槽12110和第一凹槽126,第一凹槽126位于第一容纳槽12110的远离活性物质涂覆部21的一侧,且第一凹槽126朝向背离第一容纳槽12110的方向敞开,从而有利于从极柱12的外侧,即极柱12的远离活性物质涂覆部21的一侧,通过第一凹槽126对导电部22与第一端壁12111进行激光焊接,也即便于通过外部焊接实现导电部22与极柱12的电连接。也就是说,通过上述结构设置,可便于通过第一凹槽126对极柱12和导电部22进行外部焊接,便于电池单体10的加工和制造,能节省加工和制造的成本。
进一步地,为了方便且有效地通过第一凹槽126对导电部22与第一容纳槽12110的槽壁进行焊接,提高导电部22与第一容纳槽12110的槽壁焊接可靠性,在本申请的实施例中,可以将第一凹槽126和第一容纳槽12110之间的部分,与导电部22激光焊接,也即将图中图24所示的间隔部127与导电部22激光焊接,以实现电芯组件2与极柱12的电连接。极柱12的位于第一凹槽126和第一容纳槽12110之间的间隔部127的厚度较薄,间隔部127隔离第一凹槽126和第一容纳槽12110,间隔部127的靠近活性物质涂覆部21的一侧壁面可以作为第一端壁12111,当导电部22需要与第一端壁12111进行焊接时,由于间隔部127的厚度相对较薄,从而有利于通过第一凹槽126实现对导电部22和第一端壁12111的焊接,提高焊接的便利性和可靠性。
在一些实施例中,第一容纳槽12110可以构造为横截面的长度大于宽度的形状,例如矩形、椭圆形、跑道形等等,导电部22与极柱12焊接形成的焊印可以为平行于第一容纳槽12110的长度方向的长条形焊印,以提高焊接可靠性,且增大过流性能。示例性地,当导电部22与第一端壁12111焊接形成焊印为长条形焊印时,焊印的宽度可以大于或等于6mm,焊印距离第一侧壁12113的距离可以大于或等于1mm,以在保证焊接便捷性和可靠性的同时,保证电池单体10的过流能力。
请再次参照图23,进一步地,电池单体10还可以包括槽盖7,槽盖7设于极柱12且封盖第一凹槽126的槽口。
在上述技术方案中,通过设置封盖第一凹槽126的槽盖7,使得极柱12可以通过槽盖7实现与汇流部件的间接电连接,可以通过对槽盖7的位置及结构设置,使得槽盖7与汇流部件的电连接更加方便且电连接面积更大。由此,通过设置槽盖7能便于电池100内相邻电池单体10的电连接,且由于电池单体10与电池单体10电连接的位置位于槽盖7处,与导电部22和极柱12的电连接位置能够通过第一凹槽126隔开,二者之间干涉更少,能进一步提高电池单体10的稳定性和可靠性。
示例性地,请参照图25,图25为本申请一些实施例提供的电池单体10的局部剖视示意图,容纳部121也可以设置为包括第二容纳槽12120,极柱12远离活性物质涂覆部21一侧的表面为极柱外端面123,第二容纳槽12120的槽口形成在极柱外端面123上,第二容纳槽12120通过穿孔12130与壳体11的内部连通,导电部22穿设于穿孔12130且至少部分容纳于第二容纳槽12120内。
可以理解的是,第二容纳槽12120为槽体,槽体为具有一定深度的槽状结构。例如,当极柱12设置在壳体11的上端壁,极柱外端面123为极柱12的上表面时,第二容纳槽12120形成为槽口向上敞开,槽壁向下凹陷的容纳槽。又例如,当极柱12设置在壳体11的下端壁,极柱外端面123为极柱12的下表面时,第二容纳槽12120形成为槽口向下敞开,槽壁向上凹陷的容纳槽。
在上述技术方案中,请再次参照图25,一方面,极柱12设置第二容纳槽12120,可一定程度减轻极柱12的重量,以能提高电池单体10和电池100的重量能量密度;另一方面,由于第二容纳槽12120的槽口形成在极柱外端面123上,且极柱外端面123为极柱12的远离活性物质涂覆部21一侧的表面,使得第二容纳槽12120可以朝向背离活性物质涂覆部21的方向敞开,这样,当将导电部22的至少部分容纳于第二容纳槽12120内时,可以容易地通过第二容纳槽12120的槽口实现对导电部22的收纳整理,且可以容易地通过第二容纳槽12120的槽口实现对导电部22与极柱12的电连接操作等,进而可以降低电池单体10的生产难度,提高电池单体10的生产效率。
同时,由于第二容纳槽12120朝能通过穿孔12130与壳体11的内部连通,使得第二容纳槽12120还可以作为电解液的缓冲和暂存结构,使得壳体11内可容纳更多电解液,由于电池单体10充放电过程中会损耗电解液,因而当电解液更多时,可延长电池单体10的使用寿命;且也是因为第二容纳槽12120能通过穿孔12130与壳体11的内部连通,第二容纳槽12120也可以作为电芯组件2内部产气的容纳和缓冲结构,减少电池单体10的膨胀,提高电池单体10的可靠性和稳定性。
值得说明的是,当容纳部121具有第二容纳槽12120,导电部22穿设于穿孔12130且至少部分容纳于第二容纳槽12120内时,导电部22与极柱12的电连接位置不限。
示例性地,当导电部22穿设于穿孔12130且至少部分容纳于第二容纳槽12120内时,在本申请的实施例中,导电部22与极柱12的电连接位置位于极柱12形成的穿孔12130的孔壁。
在上述技术方案中,通过将导电部22与极柱12的电连接位置设置于穿孔12130的孔壁上,方便通过第二容纳槽12120对导电部22与极柱12进行电连接操作,而且在导电部22与极柱12的电连接面积较大时,可以利用导电部22与极柱12的电连接实现对穿孔12130 的密封,以节省密封成本,且减少电解液漏液,并节省密封零件。
具体地,可以在穿孔12130的与第二容纳槽12120连接的位置,进行导电部22与穿孔12130的孔壁的焊接,方便操作,而且可以通过对焊印的控制,利用焊印和导电部22实现对穿孔12130的密封,以改善壳体11内的电解液从穿孔12130漏出的问题。
再示例性地,当导电部22穿设于穿孔12130且至少部分容纳于第二容纳槽12120内时,在本申请的另外一些实施例中,导电部22与极柱12的电连接位置还可以位于极柱12形成的第二容纳槽12120的槽壁上。由此,便于电连接操作,例如当导电部22与极柱12形成的第二容纳槽12120的槽壁进行焊接时,可以改善焊接产生的导电颗粒进入壳体11内,造成短路等问题的发生。
请再次参照图25,极柱12包括第二端壁12121和第二侧壁12123,第二端壁12121位于第二侧壁12123的靠近活性物质涂覆部21的一侧,第二端壁12121和第二侧壁12123围设形成第二容纳槽12120,穿孔12130开设于第二端壁12121,导电部22与极柱12的电连接位置位于第二端壁12121和/或位于第二侧壁12123。
更具体地,导电部22与极柱12可以通过焊接形成电连接,因此焊接位置即为导电部22与极柱12的电连接位置。在本申请地其他实施例中,导电部22与极柱12还可以通过其他方式代替焊接实现电连接,例如设置导电胶或导电钉等方式实现,这里不作赘述。
为简化描述,后文以导电部22与极柱12焊接形成电连接,焊接位置即为导电部22与极柱12的电连接位置为例进行介绍。例如在一些实施例中,导电部22与极柱12的电连接位置位于第二端壁12121和/或第二侧壁12123,可以是导电部22与第二端壁12121和第二侧壁12123中的至少一个焊接。
在上述技术方案中,通过将导电部22与极柱12的电连接位置设置在第二端壁12121和第二侧壁12123中的至少一个上,使得第二容纳槽12120不但具有容纳导电部22的至少部分的作用,第二容纳槽12120的槽壁还具有与导电部22实现电连接的作用,可以简化极柱12的结构,便于极柱12的加工。而且由于穿孔12130开设于第二端壁12121,便于导电部22通过穿孔12130伸入第二容纳槽12120,可以简化导电部22的结构,减少导电部22的冗余,降低导电部22的成本。并且,第二容纳槽12120的槽口敞开方向使得可以容易地通过第二容纳槽12120的槽口对导电部22与第二容纳槽12120的槽壁进行电连接操作,可以降低电连接的难度,并且利用第二容纳槽12120的槽壁实现与导电部22的电连接,可以使得导电部22与极柱12电连接的区域相对较大,可以提高电连接的可靠性与稳定性,进而提升电池单体10的性能。
此外,由于导电部22与极柱12的电连接位置位于第二容纳槽12120内,不但可以避免电连接位置凸出于极柱12的外部,占用极柱12之外的空间,而且可以使得电连接的位置获得极柱12的保护,提高导电部22与极柱12的电连接的可靠性与稳定性。
请再次参照图25,在一些实施例中,导电部22的局部形状与第二端壁12121的局部形状相匹配,且贴合设置并实现电连接,以使导电部22与第二端壁12121电连接的位置沿第二端壁12121的长度或宽度方向延伸。例如,当第二端壁12121为平面时,导电部22的局部也可以为平面并贴合于第二端壁12121,并对贴合的位置进行电连接,例如焊接。由此,可以提升电连接的面积,提升电连接的可靠性与稳定性。
值得说明的是,第二端壁12121的形状不限,例如可以为平板状或弧形板状结构。其中,当第二端壁12121为平板状结构时,第二端壁12121与极柱12的轴向R呈夹角布置,例如可以是与极柱12的轴向R相垂直的平板状结构,又例如还可以是与极柱12的轴向R不垂直的倾斜平板结构,但倾斜方向不限。
例如,请再次参照图25,当第二端壁12121呈平板状结构时,第二端壁12121与极柱12的轴向R的夹角θ等于90°,即沿着从穿孔12130到第二侧壁12123的方向,第二端壁12121与活性物质涂覆部21等间距。由此,便于导电部22与第二端壁12121焊接。
又例如,第二端壁12121与极柱12的轴向R的夹角θ大于90°,即沿着从穿孔12130 到第二侧壁12123的方向,第二端壁12121朝向靠近活性物质涂覆部21的方向倾斜延伸。由此,导电部22沿第二端壁12121的延伸距离可以增大,以增大电连接的可靠性。示例性地,第二端壁12121与极柱12的轴向R的夹角θ可以为90°-145°,例如100°、110°、120°、130°、140°等等,一方面可以使得第二端壁12121容易加工且便于与导电部22电连接,另一方面可以较为充分地利用极柱12内的空间容纳导电部22。
再例如,第二端壁12121与极柱12的轴向R的夹角θ小于90°,即沿着从穿孔12130到第二侧壁12123的方向,第二端壁12121朝向远离活性物质涂覆部21的方向倾斜延伸。由此,导电部22沿第二端壁12121的延伸距离可以增大,以增大电连接的可靠性。示例性地,第二端壁12121与极柱12的轴向R的夹角θ可以为45°-90°,例如50°、60°、70°、80°等等,一方面可以使得第二端壁12121容易加工且便于与导电部22电连接,另一方面可以较为充分地利用极柱12内的空间容纳导电部22。
当然,本申请不限于此,在本申请的其他实施例中,导电部22与第二端壁12121电连接的位置,也可以并不是沿第二端壁12121的长度或宽度方向延伸的,其还可以是离散设置的多个点,例如,导电部22具有间隔设置的多个部位分别与第二端壁12121焊接,这里不作赘述。
请再次参照图25,并进一步参照图26,图26为本申请一些实施例提供的电池单体10的局部剖视示意图。无论第二端壁12121与极柱12的轴向R的夹角θ具体为何值,在本申请的实施例中,当导电部22与第二端壁12121电连接时,均可以根据需求在第二端壁12121上设置第二沉槽12122,第二沉槽12122为第二端壁12121的局部向靠近活性物质涂覆部的一端下沉形成的凹槽。导电部22与第二端壁12121电连接的位置至少部分位于第二沉槽12122内。
在上述技术方案中,将导电部22的位于第二沉槽12122内的部分与第二沉槽12122形状设置为相匹配,且贴合设置以实现电连接,可以利用第二沉槽12122实现对导电部22电连接位置的预定位和限位,有利于找准位置实现电连接,提高生产效率,并提高电连接位置的稳定性和可靠性,以保证电池单体10充放电作业的可靠性和稳定性。
请再次参照图26,在本申请的实施例中,极柱12与壳体11的连接方式不限,例如既可以为焊接,也可以为铆接,例如,当二者通过铆接的方式配合时,壳体11上具有安装孔113,极柱12铆接安装于安装孔113处。当然,可以理解的是,当二者通过焊接或其他方式配合时,壳体11上也可以设有安装孔113,极柱12安装于安装孔113处。
可选地,请再次参照图25,第二容纳槽12120可以对应安装孔113的位置设置,或者说,在垂直于极柱12的轴向R的投影面上,第二容纳槽12120的正投影位于安装孔113的正投影范围内,使得第二容纳槽12120可以具有较大的深度,以容纳更多的导电部22,进而可以更大程度地减少导电部22在壳体11内的占用空间。
在一些实施例中,请再次参照图25,当壳体11上具有安装孔113,极柱12安装于安装孔113时,沿极柱12的轴向R,第二容纳槽12120的深度H3大于或等于极柱外端面123到安装孔113的最小距离H4。
需要说明的是,第二容纳槽12120的具体形状不限,可以为规则形状,也可以为不规则形状,例如横截面为矩形、椭圆形、或跑道形的等截面柱形槽,或者横截面为矩形且截面尺寸渐变的梯形槽,或者横截面为圆形且截面尺寸渐变的半球形槽,或者横截面为椭圆形且截面尺寸渐变的半椭球形槽等等。值得说明的是,本文所述的跑道形指的是长方形的两个短边通过外凸曲线代替的形状。
因此,第二容纳槽12120的深度H3指的是:第二容纳槽12120沿极柱12的轴向R的最大深度。由于在极柱12的轴向R上,第二容纳槽12120的深度H3大于或等于极柱外端面123到安装孔113的最小距离H4,可以充分利用极柱12的体积,使得第二容纳槽12120具有较大的深度,有利于容纳更多的导电部22,进而可以更大程度地减少导电部22在壳体11内的占用空间,进一步提升电池单体10的能量密度,进一步减小导电部22在壳体11内 的冗余;同时,由于第二容纳槽12120具有较大的深度,也可以容纳电芯组件2的产气,保证电池单体10的可靠性和稳定性,还可以容纳更多电解液,以能保证电池单体10的使用寿命。
请参照图36,并进一步参照图27和图28,图27为本申请一些实施例提供的电池单体10的局部剖视示意图,图28为图27所示的电池单体10的结构爆炸图,在本申请的实施例中,当容纳部121具有上述任一实施例的第二容纳槽12120时,可选地,电池单体10还可以进一步包括第一盖板13,第一盖板13与极柱12配合,且封闭第二容纳槽12120的槽口,第一盖板13与极柱12电连接。
在上述技术方案中,通过设置第一盖板13封闭第二容纳槽12120的槽口,可以避免壳体11内的电解液从第二容纳槽12120的槽口漏出,而且由于第一盖板13封闭第二容纳槽12120的槽口并与极柱12电连接,从而可以利用第一盖板13很容易地实现极柱12与汇流部件的间接电连接,而且有利于增大该电连接处的连接面积,进而有利于降低该电连接处的电阻。
值得说明的是,第一盖板13与极柱12的配合方式和配合位置不限,只要能够实现第一盖板13对于第二容纳槽12120的槽口的封闭即可。例如,在一些实施例中,第一盖板13可以与极柱12焊接,加工时,可以先将导电部22穿过穿孔12130并焊接于第二容纳槽12120的槽壁上,然后将第一盖板13与极柱12焊接,以封闭第二容纳槽12120的槽口。
还需要说明的是,第一盖板13的具体构成不限。例如在一些可选实施例中,图29为图28所示的第一盖板的结构爆炸图,请参照图27-图29,第一盖板13包括材质不同的第一导电件131与第二导电件132,第一导电件131与极柱12配合且电连接,第二导电件132与第一导电件131配合且电连接。
在上述技术方案中,将第一盖板13设置为复合形式,将第一导电件131设置为与极柱12的材质相同,从而便于第一导电件131与极柱12的电连接,例如可以很容易地通过焊接使得第一导电件131与极柱12可靠且稳定连接。并且由于第二导电件132与第一导电件131的材质不同,便于利用第二导电件132与材质不同于极柱12的汇流部件等电连接,例如可以很容易地通过焊接使得第二导电件132与材质与第二导电件132相同的汇流部件可靠且稳定连接。
例如,当极柱12为负极极柱时,极柱12为铜柱,汇流部件为铝片时,此时,可以将第一导电件131设置为铜材,将第二导电件132设置为铝材,此时,极柱12与第一导电件131的材质相同可以有效地焊接,第二导电件132与汇流部件的材质相同可以有效地焊接,从而可以有效地实现极柱12通过第一盖板13与汇流部件的间接电连接。而且,极柱12与第一导电件131为铜材与铜材的焊接,流动性好,不易产生裂纹,有利于提升焊接处的密封效果。
请再次请参照图27-图29,在一些可选示例中,第一导电件131位于在第二容纳槽12120与第二导电件132之间。在上述技术方案中,由于第一导电件131位于第二容纳槽12120与第二导电件132之间,因而可分隔第二容纳槽12120与第二导电件132,从而当壳体11内的电解液从穿孔12130进入第二容纳槽12120时,可以利用第一导电件131防止该部分电解液与第二导电件132接触,解决电解液对第二导电件132造成腐蚀的问题。
值得说明的是,第一导电件131与第二导电件132的配合方式不限。例如在一些实施例中,请参照图27-图29,第一导电件131上具有第二凹槽1311,第二导电件132嵌设于第二凹槽1311,第二凹槽1311的槽口形成在第一导电件131的远离第二容纳槽12120一侧的表面上,以使第二导电件132由第二凹槽1311的槽口显露。或者,在其他实施例中,第一导电件131和第二导电件132的连接方式还可以为紧固连接、卡接等。
还需要说明的是,第二导电件132由第二凹槽1311的槽口显露中的“显露”指的是:第一导电件131在第二凹槽1311的槽口位置对第二导电件132无遮挡即可,不要求第二导电件132从第二凹槽1311的槽口凸出,例如,第二导电件132可以是平齐于第一导电件131 的远离第二容纳槽12120一侧的表面,也可以是第二导电件132凸出于第一导电件131的远离第二容纳槽12120一侧的表面。
在上述技术方案中,一方面,通过将第二导电件132嵌设于第一导电件131内,从而可以降低第一导电件131与第二导电件132的装配难度,提高第一导电件131与第二导电件132配合的稳定性和便捷性,并且可以减小第一盖板13的厚度,减小第一盖板13对空间的占用,以提高电池单体10的空间利用率。另一方面。并且,由于第二导电件132可以通过第二凹槽1311的槽口从第一导电件131的远离第二容纳槽12120一侧的表面显露出来,从而有利于实现第二导电件132与极柱12外的汇流部件电连接。
此外,由于第二凹槽1311的槽口形成在第一导电件131的远离第二容纳槽12120一侧的表面上,说明第二凹槽1311朝向背离活性物质涂覆部21的方向敞开,从而第一导电件131的用于限定出第二凹槽1311的槽壁的部分位于在第二容纳槽12120与第二导电件132之间,以分隔开第二容纳槽12120与第二导电件132,从而阻止进入第二凹槽1311的电解液与第二导电件132接触,减少电解液的泄露。
当然,在其他实施例中,第一盖板13也可以并非为多种材质组成的复合形式,例如在本申请的其他实施例中,图30为本申请一些实施例提供的电池单体的局部剖视示意图,图31为图30所示的电池单体的结构爆炸图,请参照图30和图31,也可以将第一盖板13整体设置为采用同一种材质加工而成的非复合形式,例如用于适配正极极柱,这里不作赘述。
请再次请参照图27-图29,在一些实施例中,第一盖板13还嵌设于第二容纳槽12120的槽口处。在上述技术方案中,通过将第一盖板13嵌设于第二容纳槽12120内,可以降低第一盖板13与极柱12的装配难度,提高第一盖板13与极柱12的装配稳定性,以及连接的可靠性和便捷性,而且可以减小第一盖板13对于极柱12之外的空间占用。而且,由于第一盖板13嵌设于第二容纳槽12120的槽口处,使得第二容纳槽12120内可以具有较为充足的空间容纳导电部22。
当然,在本申请的其他实施例中,第一盖板13与极柱12的配合方式不限于嵌设于第二容纳槽12120内,第一盖板13还可直接罩设在极柱12外,也即直接盖设于第二容纳槽12120的槽口处,方便与电池100的汇流部件配合即可,本实施例不作限定。
请再次请参照图27-图29,可选地,在本申请的实施例中,极柱12形成第二容纳槽12120的槽口处的壁面的至少部分为导向斜面12126,导向斜面12126用于引导第一盖板13与第二容纳槽12120的槽口配合。在上述技术方案中,通过将第二容纳槽12120的槽口处的壁面加工为具有引导作用的斜面,可以降低第一盖板13与第二容纳槽12120的装配难度,提高第一盖板13与第二容纳槽12120的装配效率。而且,当第一盖板13与导向斜面12126焊接时,可以增大焊接处的面积,提高第一盖板13与极柱12焊接相连的可靠性,并改善焊接时熔池塌陷或激光射入极柱12内的问题。
具体地,请参照图27-图29,第二容纳槽12120包括第一槽段12124和位于第一槽段12124的靠近极柱外端面123的一侧的第二槽段12125。第二槽段12125的横截面积大于第一槽段12124的横截面积,使第二容纳槽12120呈阶梯槽状,且使第一槽段12124和第二槽段12125的连接位置形成第三台阶面12127,从而使得第一盖板13在嵌设于第二容纳槽12120时,具体能嵌设在第二槽段12125内且支撑于第三台阶面12127。
在上述技术方案中,通过将第二容纳槽12120设置为阶梯槽形式,可以使得第一盖板13稳定配合在第二容纳槽12120的槽口位置,提高第一盖板13与极柱12的连接稳定性,而且可以通过对第一槽段12124的槽深限定,使得第二容纳槽12120内具有较为充足的空间容纳导电部22。
进一步地,当极柱12形成第二容纳槽12120的槽口处的壁面为导向斜面12126时,可以将第二槽段12125的横截面积设置为沿着靠近极柱外端面123的方向逐渐增大,以使第二槽段12125的侧壁形成为导向斜面12126,从而便于加工,而且可以简单且有效地满足导向需求。
请再次请参照图27-图29,在本申请的实施例中,第一盖板13还可根据需求开设应力释放槽133,应力释放槽133位于第一盖板13的外周区域,以辅助第一盖板13进行应力释放。在上述技术方案中,通过在第一盖板13上设置应力释放槽133,可以释放第一盖板13在自身加工过程中,或者第一盖板13与极柱12电连接过程中产生的应力,以改善第一盖板13受应力而发生的变形或受损等相关问题。
具体地,当第一盖板13与第二容纳槽12120嵌设焊接时,可以利用应力释放槽133释放焊接产生的应力,改善热量横向传导,降低第一盖板13受损或变形等的几率。同时,当第一盖板13为上述包括第一导电件131和第二导电件132的复合形式时,可以将应力释放槽133设置在第一导电件131上且位于第二导电件132的外周区域,当第一导电件131与第二容纳槽12120嵌设焊接时,可以利用应力释放槽133释放焊接产生的应力,改善热量横向传导,降低第二导电件132受损或变形等的几率。而且,当第二导电件132与第一导电件131嵌设焊接时,可以利用应力释放槽133释放焊接产生的应力,改善热量横向传导,降低引发第一导电件131变形,导致第一导电件131无法与第二容纳槽12120嵌设的几率。
请参照图30-图31,本申请的实施例中,电池单体10还可根据需求设置第二盖板14,第二盖板14盖设于穿孔12130外,且同时位于第二容纳槽12120内的导电部22外。
值得说明的是,当电池单体10包括第二盖板14时,电池单体10可以同时包括第一盖板13,也可以不同时包括第一盖板13。进一步地,当电池单体1同时包括第二盖板14和第一盖板13时,第一盖板13可以为采用多种材质的复合形式,也可以为采用同一种材质的非复合形式。
在上述技术方案中,导电部22的至少部分位于第二容纳槽12120内,第二盖板14盖设于该部分的导电部22,第二盖板14还盖设穿孔12130,从而当电解液从穿孔12130进入第二容纳槽12120内,可以通过第二盖板14改善该部分电解液从极柱12溢出的问题,从而提高电池单体10的可靠性。
例如图30-图31所示,当导电部22的局部夹设在第二盖板14与第二端壁12121之间时,可采用激光焊接的方式,将导电部22的局部、第二盖板14以及第二端壁12121三者焊接在一起,以提高极柱12和导电部22连接的可靠性。并且,由于第二盖板14可以压紧导电部22,可以利用第二盖板14提高导电部22容纳在第二容纳槽12120内的稳定性。
请参照图32,图32为本申请一些实施例的电池单体10的装配图。壳身111上的开口1110的数量为一个,壳盖112盖合于开口1110,支架3位于电芯组件2远离开口1110的一端。
其中,开口1110可以位于壳身111的顶壁、底壁或者侧壁。当开口1110位于壳身111的底壁时,其余的壁均为封闭结构,带有支架3、绝缘件4的电芯组件2只可以从该开口1110装入壳身111内,电芯组件2在壳身111内安装到位之后,再将壳盖112盖合在开口1110处,以密封开口1110,绝缘件4压在壳身111的顶壁和支架3之间,可以降低绝缘件4脱落的风险,降低电芯组件2因裸漏而失效的风险,同时降低壳体11被腐蚀的风险,提高电池单体10的可靠性和稳定性。
在上述技术方案中,在壳身111上设置一个开口1110,并将支架3设置在电芯组件2远离开口1110的一端,带有支架3、绝缘件4的电芯组件2只可以从该开口1110装入壳身111内,入壳方向唯一,有利于提高安装效率,并且壳体11不会刮擦到绝缘件4的边缘,也不会刮擦到绝缘件4与支架3之间的连接位置,可以提高绝缘件4与支架3之间的连接可靠性,降低绝缘件4脱落的风险,进而可以降低电芯组件2因裸漏使壳体11被腐蚀的风险,降低电芯组件2自身失效的风险,且降低漏液的风险,继而能提高电池单体10的可靠性和稳定性。
可选地,所有的极柱12可以均设于壳盖112,即所有的极柱12均位于电芯组件2的远离支架3的一侧,导电部22可以与壳盖112上的极柱12对应电连接。
可选地,其中一个极柱12可以设于壳盖112,另一个极柱12可以设于壳身111的与该 开口1110相对的端壁,其中一个导电部22可以从壳盖112上的极柱12电连接。
可选地,所有的极柱12可以均设于壳身111的与该开口1110相对的端壁,导电部22可以从支架3穿出,且与壳身111的端壁上的极柱12对应电连接。
请再次参照图32,壳身111具有与开口1110相对的安装壁1112,至少一个极柱12设在安装壁1112上。通过该方式电芯组件2顺着开口1110进入壳身111,导电部22直接与极柱12相对,可以使导电部22能比较容易与极柱12进行连接,提高电池单体10的装配效率。
示例性地,壳身111的顶壁为安装壁1112,壳身111的底壁具有开口1110,壳盖112设在壳身111的底部,电芯组件2能沿着Z方向自下而上安装到壳身111内,使导电部22能很容易地连接极柱12。
请参照图33,图33为本申请另一些实施例的电池单体10的装配图。壳身111上的开口1110的数量为两个,每个开口1110处均盖合有一个壳盖112,支架3位于电芯组件2远离任意一个开口1110的一端。
在上述技术方案中,在壳身111上设置两个开口1110,并在电芯组件2远离任意一个开口1110的一端设置支架3,带有两个支架3、绝缘件4的电芯组件2可以从任意一个开口1110装入壳身111内,可以根据需要选择合适的入壳方向,电芯组件2在壳身111内安装到位之后,绝缘件4的一部分可以压在壳身111的与其中一个开口1110相对的壁和对应的支架3之间,绝缘件4的另一部分可以压在壳身111的与其中另一个开口1110相对的壁和对应的支架3之间,进一步降低绝缘件4脱落的风险,降低电芯组件2因裸漏而失效的风险,同时降低壳体11被腐蚀的风险,提高电池单体10的可靠性和稳定性。
其中,两个开口1110可以位于壳身111的顶壁、底壁或者侧壁。两个开口1110可以设于壳身111的两个相对设置的壁上,例如,两个开口1110可以分别设于壳身111的顶壁和底壁上,再例如,两个开口1110可以分别设于壳身111的两个相对设置的侧壁上。两个开口1110也可以设于壳身111的两个相邻设置的壁上,例如,两个开口1110可以分别设于壳身111相邻设置的顶壁和侧壁上,再例如,两个开口1110可以分别设于壳身111相邻设置的底壁和侧壁上,又例如,两个开口1110可以分别设于壳身111相邻设置的两个侧壁上。
当两个开口1110分别设在壳身111的两个相对设置的壁上,其余的壁均为封闭结构,其中一个开口1110盖合有第一壳盖1121,另一个开口1110盖合有第二壳盖1122,所有的极柱12可以均设于第一壳盖1121,或者,所有的极柱12可以均设于第二壳盖1122,或者,一部分极柱12设于第一壳盖1121或者第二壳盖1122,另一部分极柱12设于壳身111。
请再次参照图33,第一壳盖1121和第二壳盖1122上分别设有一个极柱12,电芯组件2的两端均设有一个支架3,带有支架3、绝缘件4的电芯组件2可以从任意一个开口1110装入壳身111内,电芯组件2在壳身111内安装到位之后,再将两个壳盖112分别盖合在两个开口1110处,以密封对应的开口1110,带有两个支架3的电芯组件2入壳之后,其中一个导电部22从一个支架3穿出且与第一壳盖1121上的极柱12电连接,其中另一个导电部22从另一个支架3穿出且与第二壳盖1122上的极柱12电连接。
在一些实施例中,壳体11邻近支架3的一侧的壳壁上设置有至少一个极柱12。带有支架3、绝缘件4的电芯组件2顺着开口1110进入壳身111,导电部22直接与极柱12相对,可以使导电部22能比较容易与极柱12进行连接,提高电池单体10的装配效率。
请再次参照图3-图6,描述本申请具体实施例的电池单体10。
在本申请的实施例中,电池单体10呈长方体,电池单体10的高度方向为第一方向Z,电池单体10的长度方向为第二方向X,电池单体10的厚度方向为第三方向Y。电池单体10包括壳体11,壳体11包括壳身111和壳盖112,壳身111为方形环状结构,壳身111沿第一方向Z的一端敞开,沿第一方向Z的另一端封闭,壳盖112盖设于壳身111的敞开位置。壳身111沿第一方向Z的封闭端设有两个极柱12,两个极柱12沿第二方向X间隔开以分别为正极极柱和负极极柱。
两个极柱12均为设置有容纳部121,容纳部121包括第二容纳槽12120,具体地,第一极柱12包括第二端壁12121和第二侧壁12123,第二端壁12121位于第二侧壁12123的靠近壳盖112的一侧,第二端壁12121和第二侧壁12123围设形成第二容纳槽12120,第一极柱12远离壳盖112的一侧的表面为极柱外端面123,第二容纳槽12120的槽口形成在极柱外端面123上,第二端壁12121上开设有穿孔12130。
电池单体10还包括电芯组件2、支架3和绝缘件4,电芯组件2包括活性物质涂覆部21和导电部22,活性物质涂覆部21容纳于壳体11内,支架3设于活性物质涂覆部21的一端,并且支架3位于壳身111沿第一方向Z的封闭端与活性物质涂覆部21之间,支架3具有两个过孔311,两个过孔311沿第二方向X间隔开。
支架3具有主体部36和延伸部37,延伸部37设于主体部36周侧,主体部36在壳盖112平面上的投影位于活性物质涂覆部21在壳盖112平面上的投影内,延伸部37在壳盖112平面上的投影位于活性物质涂覆部21在壳盖112平面上的投影外。
本申请实施例的技术方案中,采用独立的支架3代替相关技术中顶盖下方镶嵌的塑胶件,将支架3与电芯组件2配合之后一起入壳,在将带有支架3的电芯组件2装入壳体11内的过程中,支架3不仅可以约束活性物质涂覆部21,而且延伸部37可以对活性物质涂覆部21形成保护,降低活性物质涂覆部21触碰壳体11的概率,尽可能地减少壳体11刮伤活性物质涂覆部21的现象发生,提高电池单体10的使用可靠性,并且安装步骤简单、有利于提高生产效率。
根据本申请的一些实施例,本申请还提供了一种电池100,包括以上任一方案所述的电池单体10。
在上述技术方案中,由于电池100设置上述的电池单体10,支架3不仅可以约束活性物质涂覆部21,而且延伸部37可以对活性物质涂覆部21形成保护,降低活性物质涂覆部21触碰壳体11的概率,尽可能地减少壳体11刮伤活性物质涂覆部21的现象发生,提高电池100的使用可靠性,并且安装步骤简单、有利于提高生产效率。
根据本申请的一些实施例,本申请还提供了一种用电装置1000,包括以上方案所述的电池100,并且电池100用于为用电装置1000提供电能。
在上述技术方案中,由于用电装置1000设置上述的电池100,由于电池100的工作可靠性与稳定性可以提升,可以提升用电装置1000的工作可靠性与稳定性。可以理解的是,当用电装置1000为车辆时,由于电池100的使用时长有所提升,有利于提高车辆的续航里程。
用电装置1000可以是前述任一应用电池100的设备或系统。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (28)

  1. 一种电池单体(10),其中,包括:
    壳体(11),包括壳盖(112)和具有开口(1110)的壳身(111),所述壳盖(112)盖合于所述开口(1110);
    电芯组件(2),包括活性物质涂覆部(21),所述活性物质涂覆部(21)设于所述壳体(11)内;
    支架(3),设置于所述活性物质涂覆部(21)远离所述开口(1110)的一端,并与所述电芯组件(2)配合;
    其中,所述支架(3)具有主体部(36)和设于所述主体部(36)周侧的延伸部(37),所述主体部(36)在所述壳盖(112)平面上的投影位于所述活性物质涂覆部(21)在所述壳盖(112)平面上的投影内,所述延伸部(37)在所述壳盖(112)平面上的投影位于所述活性物质涂覆部(21)在所述壳盖(112)平面上的投影外。
  2. 根据权利要求1所述的电池单体(10),其中,所述延伸部(37)位于所述主体部(36)沿预设方向相对的两侧,所述预设方向平行于所述壳盖(112)平面。
  3. 根据权利要求2所述的电池单体(10),其中,所述延伸部(37)为环绕所述主体部(36)的环形结构。
  4. 根据权利要求1所述的电池单体(10),其中,所述延伸部(37)背向所述壳盖(112)的表面的边缘具有导向面(35),所述导向面(35)包括弧面和/或斜面。
  5. 根据权利要求1-4中任一项所述的电池单体(10),其中,所述支架(3)与所述电芯组件(2)卡接或者粘接。
  6. 根据权利要求1-4中任一项所述的电池单体(10),其中,所述延伸部(37)靠近所述壳盖(112)的一侧设有限位凸部(38),所述支架(3)通过所述限位凸部(38)与所述活性物质涂覆部(21)卡接。
  7. 根据权利要求6所述的电池单体(10),其中,所述限位凸部(38)的朝向所述活性物质涂覆部(21)的一侧表面包括:
    第一表面(381),所述第一表面(381)与所述活性物质涂覆部(21)的侧壁贴合;和/或,
    第二表面(382),所述第二表面(382)与所述活性物质涂覆部(21)之间的距离沿所述支架(3)指向开口(1110)的方向逐渐增大。
  8. 根据权利要求1-7中任一项所述的电池单体(10),其中,所述电池单体(10)还包括:
    绝缘件(4),所述绝缘件(4)包裹所述活性物质涂覆部(21)且与所述延伸部(37)连接。
  9. 根据权利要求8所述的电池单体(10),其中,所述绝缘件(4)与所述延伸部(37)的周壁面(370)连接。
  10. 根据权利要求9所述的电池单体(10),其中,所述周壁面(370)具有第一台阶面(371)和第二台阶面(372),所述第二台阶面(372)位于所述第一台阶面(371)靠近所述壳盖(112)的一侧,所述第二台阶面(372)相比所述第一台阶面(371)更靠近所述活性物质涂覆部(21),所述绝缘件(4)连接于所述第二台阶面(372)。
  11. 根据权利要求10所述的电池单体(10),其中,所述第一台阶面(371)相比所述绝缘件(4)的外侧面更远离所述活性物质涂覆部(21)。
  12. 根据权利要求1-7中任一项所述的电池单体(10),其中,所述电池单体(10)还包括:
    绝缘件(4),所述绝缘件(4)包裹所述活性物质涂覆部(21)且与所述主体部(36)远离所述壳盖(112)的表面连接。
  13. 根据权利要求1-12中任一项所述的电池单体(10),其中,所述壳体(11)上设有极柱(12);所述电芯组件(2)还包括导电部(22),所述导电部(22)与所述活性物质涂覆部(21)靠近所述主体部(36)的一侧连接,所述主体部(36)具有过孔(311),所述导电部(22)穿过所述过孔(311)以与所述极柱(12)连接。
  14. 根据权利要求13所述的电池单体(10),其中,所述支架(3)为一体式结构;或者,所述支架(3)为分体式结构且包括单独成型的第一支架(33)和第二支架(34),所述第一支架(33)与所述第二支架(34)之间限定出所述过孔(311)。
  15. 根据权利要求13所述的电池单体(10),其中,所述主体部(36)的背离所述活性物质涂覆部(21)的一侧开设有与所述过孔(311)连通的容置槽(393),所述容置槽(393)用于容纳至少部分所述极柱(12)。
  16. 根据权利要求13所述的电池单体(10),其中,所述主体部(36)的背离所述活性物质涂覆部(21)的一侧设置有定位部(32),所述定位部(32)围设在所述过孔(311)的周向,且向靠近所述极柱(12)的方向延伸。
  17. 根据权利要求16所述的电池单体(10),其中,所述极柱(12)上设有容纳部(121),所述导电部(22)的至少部分容纳于所述容纳部(121)内,所述定位部(32)的至少部分伸入所述容纳部(121)内。
  18. 根据权利要求13所述的电池单体(10),其中,所述主体部(36)的朝向所述活性物质涂覆部(21)的一侧形成有与所述过孔(311)连通的引导槽(312),所述引导槽(312)容纳至少部分所述导电部(22),沿所述主体部(36)靠近所述活性物质涂覆部(21)的方向,所述引导槽(312)的横截面积逐渐增大。
  19. 根据权利要求18所述的电池单体(10),其中,所述支架(3)上具有至少一个第一注液导流槽(392),所述第一注液导流槽(392)位于所述支架(3)的朝向所述活性物质涂覆部(21)的一侧,至少一个所述第一注液导流槽(392)连通所述引导槽(312)。
  20. 根据权利要求1-19中任一项所述的电池单体(10),其中,所述支架(3)上具有第一注液导流槽(392),所述第一注液导流槽(392)位于所述支架(3)的面向所述活性物质涂覆部(21)的一侧;和/或,所述支架(3)上具有第二注液导流槽,所述第二注液导流槽位于所述支架(3)的背向所述活性物质涂覆部(21)的一侧。
  21. 根据权利要求1-20中任一项所述的电池单体(10),其中,所述支架(3)的朝向所述电芯组件(2)的一侧具有避空部(391),用于避让所述电芯组件(2)朝向所述支架(3)的一侧的外缘。
  22. 根据权利要求1-21中任一项所述的电池单体(10),其中,所述电芯组件(2)还包括导电部(22),所述导电部(22)与所述活性物质涂覆部(21)靠近所述主体部(36)的一侧连接;
    所述壳体(11)上设有极柱(12),所述极柱(12)上设有容纳部(121),所述导电部(22)的至少部分容纳于所述容纳部(121)内且与所述极柱(12)连接。
  23. 根据权利要求22所述的电池单体(10),其中,所述容纳部(121)具有第一容纳槽(12110),所述极柱(12)朝向所述活性物质涂覆部(21)一侧的表面为极柱内端面(122),所述第一容纳槽(12110)的槽口形成在所述极柱内端面(122)上,所述导电部(22)的至少部分容纳于所述第一容纳槽(12110)内。
  24. 根据权利要求22所述的电池单体(10),其中,所述容纳部(121)具有第二容纳槽(12120),所述极柱(12)远离所述活性物质涂覆部(21)一侧的表面为极柱外端面(123),所述第二容纳槽(12120)的槽口形成在所述极柱外端面(123)上,所述第二容纳槽(12120)通过穿孔(12130)与所述壳体(11)的内部连通,所述导电部(22)穿设于所述穿孔(12130)且至少部分容纳于所述第二容纳槽(12120)内。
  25. 根据权利要求1-24中任一项所述的电池单体(10),其中,所述开口(1110)的数量为两个,每个所述开口(1110)处均设有一个所述壳盖(112),所述支架(3)设置于所 述活性物质涂覆部(21)远离任意一个所述开口(1110)的一端。
  26. 根据权利要求1-25中任一项所述的电池单体(10),其中,所述壳体(11)邻近所述支架(3)的一侧的壳壁上设置有至少一个极柱(12)。
  27. 一种电池(100),其中,包括根据权利要求1-26中任一项所述的电池单体(10)。
  28. 一种用电装置(1000),其中,包括根据权利要求27所述的电池(100)。
PCT/CN2023/079690 2023-03-03 2023-03-03 电池单体、电池和用电装置 Ceased WO2024182957A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208385543U (zh) * 2018-07-02 2019-01-15 比亚迪股份有限公司 单体电池、电池模组、动力电池及电动汽车
CN210092210U (zh) * 2019-05-28 2020-02-18 东莞新能源科技有限公司 电池
CN215451570U (zh) * 2021-04-02 2022-01-07 欣旺达电动汽车电池有限公司 单体电池和电池模组
CN216055080U (zh) * 2021-10-26 2022-03-15 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN217158554U (zh) * 2022-04-08 2022-08-09 三一技术装备有限公司 电池
CN217507574U (zh) * 2021-12-28 2022-09-27 荣盛盟固利新能源科技股份有限公司 一种电池隔圈组件及电池
CN218215411U (zh) * 2022-07-21 2023-01-03 宁德时代新能源科技股份有限公司 电池单体、电池及用电设备

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7601460B2 (en) * 2003-11-28 2009-10-13 Panasonic Corporation Prismatic battery and manufacturing method thereof
JP2011076952A (ja) * 2009-09-30 2011-04-14 Toshiba Corp 密閉形電池
KR20140079693A (ko) * 2012-12-18 2014-06-27 삼성에스디아이 주식회사 이차 전지
JP2014203514A (ja) * 2013-04-01 2014-10-27 三洋電機株式会社 電池
JP6191588B2 (ja) * 2014-12-09 2017-09-06 トヨタ自動車株式会社 二次電池の製造方法
CN109844995B (zh) * 2016-09-30 2022-06-17 三洋电机株式会社 方形二次电池及其制造方法
CN111326699B (zh) * 2019-08-14 2021-11-09 宁德时代新能源科技股份有限公司 二次电池
CN110828744B (zh) * 2020-01-13 2020-07-10 比亚迪股份有限公司 一种电池、电池包和电动车
CN212571193U (zh) * 2020-06-23 2021-02-19 欣旺达电动汽车电池有限公司 一种双通单体电池和电池包
WO2022118432A1 (ja) * 2020-12-03 2022-06-09 株式会社 東芝 電池
JP7472317B2 (ja) * 2020-12-14 2024-04-22 株式会社東芝 電池
CA3202317A1 (en) * 2021-01-19 2022-07-28 Lg Energy Solution, Ltd. Battery and current collector applied thereto, and battery pack and vehicle including the same
CN113394493A (zh) * 2021-06-25 2021-09-14 银隆新能源股份有限公司 锂离子电池及具有其的电动车
CN116457974A (zh) * 2021-07-20 2023-07-18 宁德时代新能源科技股份有限公司 电池单体、电池、用电设备及电池单体的制造方法和设备
JP7738575B2 (ja) * 2021-07-21 2025-09-12 香港時代新能源科技有限公司 電池セル、電池セルの製造方法、電池セルの製造システム、電池及び電気装置
CN219917487U (zh) * 2023-03-03 2023-10-27 宁德时代新能源科技股份有限公司 电池单体、电池和用电装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208385543U (zh) * 2018-07-02 2019-01-15 比亚迪股份有限公司 单体电池、电池模组、动力电池及电动汽车
CN210092210U (zh) * 2019-05-28 2020-02-18 东莞新能源科技有限公司 电池
CN215451570U (zh) * 2021-04-02 2022-01-07 欣旺达电动汽车电池有限公司 单体电池和电池模组
CN216055080U (zh) * 2021-10-26 2022-03-15 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN217507574U (zh) * 2021-12-28 2022-09-27 荣盛盟固利新能源科技股份有限公司 一种电池隔圈组件及电池
CN217158554U (zh) * 2022-04-08 2022-08-09 三一技术装备有限公司 电池
CN218215411U (zh) * 2022-07-21 2023-01-03 宁德时代新能源科技股份有限公司 电池单体、电池及用电设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4597678A4 *

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