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 PDFInfo
- 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
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
- H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy 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 .
Landscapes
- 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
Description
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。
Claims (28)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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)。
- 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)。
- 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。
- 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。
- 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)。
- 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)。
- 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。
- 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。
- 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。
- 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)。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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)。
- 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)。
- 一种用电装置(1000),其中,包括根据权利要求27所述的电池(100)。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025528905A JP2025539133A (ja) | 2023-03-03 | 2023-03-03 | 電池セル、電池及び電気装置 |
| PCT/CN2023/079690 WO2024182957A1 (zh) | 2023-03-03 | 2023-03-03 | 电池单体、电池和用电装置 |
| CN202380042088.0A CN119256421B (zh) | 2023-03-03 | 2023-03-03 | 电池单体、电池和用电装置 |
| KR1020257016308A KR20250092229A (ko) | 2023-03-03 | 2023-03-03 | 배터리 셀, 배터리 및 전기 장치 |
| EP23925683.7A EP4597678A4 (en) | 2023-03-03 | 2023-03-03 | BATTERY COMPONENT, BATTERY AND ELECTRICAL APPLIANCE |
| US19/235,065 US20250309475A1 (en) | 2023-03-03 | 2025-06-11 | Battery cell, battery, and electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2023/079690 WO2024182957A1 (zh) | 2023-03-03 | 2023-03-03 | 电池单体、电池和用电装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/235,065 Continuation US20250309475A1 (en) | 2023-03-03 | 2025-06-11 | Battery cell, battery, and electric apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024182957A1 true WO2024182957A1 (zh) | 2024-09-12 |
Family
ID=92674033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2023/079690 Ceased WO2024182957A1 (zh) | 2023-03-03 | 2023-03-03 | 电池单体、电池和用电装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250309475A1 (zh) |
| EP (1) | EP4597678A4 (zh) |
| JP (1) | JP2025539133A (zh) |
| KR (1) | KR20250092229A (zh) |
| CN (1) | CN119256421B (zh) |
| WO (1) | WO2024182957A1 (zh) |
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2023
- 2023-03-03 EP EP23925683.7A patent/EP4597678A4/en active Pending
- 2023-03-03 WO PCT/CN2023/079690 patent/WO2024182957A1/zh not_active Ceased
- 2023-03-03 CN CN202380042088.0A patent/CN119256421B/zh active Active
- 2023-03-03 KR KR1020257016308A patent/KR20250092229A/ko active Pending
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| 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 |
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Also Published As
| Publication number | Publication date |
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| JP2025539133A (ja) | 2025-12-03 |
| EP4597678A4 (en) | 2026-01-07 |
| US20250309475A1 (en) | 2025-10-02 |
| EP4597678A1 (en) | 2025-08-06 |
| CN119256421A (zh) | 2025-01-03 |
| KR20250092229A (ko) | 2025-06-23 |
| CN119256421B (zh) | 2025-12-05 |
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