WO2023279260A1 - 电池单体、电池、用电设备及电池单体的制造方法和设备 - Google Patents

电池单体、电池、用电设备及电池单体的制造方法和设备 Download PDF

Info

Publication number
WO2023279260A1
WO2023279260A1 PCT/CN2021/104779 CN2021104779W WO2023279260A1 WO 2023279260 A1 WO2023279260 A1 WO 2023279260A1 CN 2021104779 W CN2021104779 W CN 2021104779W WO 2023279260 A1 WO2023279260 A1 WO 2023279260A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collecting
battery cell
collecting member
electrode assembly
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/104779
Other languages
English (en)
French (fr)
Inventor
柴志生
方堃
朱琳琳
郭志君
迟庆魁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Contemporary Amperex Technology Ltd
Original Assignee
Jiangsu Contemporary Amperex Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Contemporary Amperex Technology Ltd filed Critical Jiangsu Contemporary Amperex Technology Ltd
Priority to JP2023547133A priority Critical patent/JP7610018B2/ja
Priority to KR1020257042371A priority patent/KR20260003869A/ko
Priority to CN202190000391.0U priority patent/CN219040512U/zh
Priority to PCT/CN2021/104779 priority patent/WO2023279260A1/zh
Priority to EP21806119.0A priority patent/EP4138166A4/en
Priority to EP24190325.1A priority patent/EP4429012A3/en
Priority to KR1020237026248A priority patent/KR20230127330A/ko
Priority to CN202511588388.6A priority patent/CN121394704A/zh
Priority to JP2023536182A priority patent/JP7617278B2/ja
Priority to EP21949060.4A priority patent/EP4300702A4/en
Priority to PCT/CN2021/125099 priority patent/WO2023279574A1/zh
Priority to CN202180072351.1A priority patent/CN116888782B/zh
Priority to KR1020237019717A priority patent/KR102869410B1/ko
Priority to CN202122532971.9U priority patent/CN216120648U/zh
Priority to DE202021004620.8U priority patent/DE202021004620U1/de
Priority to US17/554,466 priority patent/US20230012207A1/en
Publication of WO2023279260A1 publication Critical patent/WO2023279260A1/zh
Priority to US18/398,175 priority patent/US20240128604A1/en
Anticipated expiration legal-status Critical
Priority to JP2024231229A priority patent/JP7830613B2/ja
Ceased legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/536Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/538Connection of several leads or tabs of wound or folded electrode stacks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0404Machines for assembling batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/102Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • H01M50/152Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • H01M50/184Sealing members characterised by their shape or structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • H01M50/186Sealing members characterised by the disposition of the sealing members
    • H01M50/188Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/247Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • H01M50/317Re-sealable arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • H01M50/342Non-re-sealable arrangements
    • H01M50/3425Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/528Fixed electrical connections, i.e. not intended for disconnection
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/552Terminals characterised by their shape
    • H01M50/559Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/584Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/30Batteries in portable systems, e.g. mobile phone, laptop
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • H01M50/308Detachable arrangements, e.g. detachable vent plugs or plug systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the field of battery technology, in particular, to a battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell.
  • Lithium-ion batteries are generally used in vehicles. As a rechargeable battery, lithium-ion batteries have the advantages of small size, high energy density, high power density, many cycle times and long storage time.
  • the battery cell generally includes a casing and an electrode assembly.
  • the casing is used to accommodate the electrode assembly and the electrolyte.
  • the electrode assembly generally includes a positive electrode sheet and a negative electrode sheet. move between them to generate electricity.
  • the electrode assembly For a general battery cell, the electrode assembly needs to be electrically connected to the casing so that the casing can serve as the positive or negative output pole of the battery cell. Currently, it is inconvenient to electrically connect the electrode assembly to the casing.
  • Embodiments of the present application provide a battery cell, a battery, an electrical device, and a manufacturing method and device for the battery cell, which can more conveniently realize the electrical connection between the electrode assembly and the casing.
  • the embodiment of the present application provides a battery cell, including: a case with an opening; an electrode assembly accommodated in the case; an end cap that covers the opening and is sealed with the case connection; and a current collecting member housed in the casing and located on a side of the electrode assembly facing the end cap, the current collecting member being configured to connect the casing and the electrode assembly so that the The electrode assembly is electrically connected with the case.
  • the current collecting member is located on the side of the electrode assembly facing the end cover, the electrode assembly and the casing are electrically connected through the current collecting member, the end cover is closed to the opening of the casing, and the end cover is sealed with the casing.
  • the structure makes it possible for the current collecting member to be connected to the casing inside the casing during the process of assembling the battery cells, which can ensure the firmness of the connection between the current collecting member and the casing, and connect the current collecting member to the electrode assembly and the casing Afterwards, the end cover is closed on the opening of the casing and sealed with the casing, so that the electrical connection between the electrode assembly and the casing is more convenient.
  • the current collecting member is connected to the inner side of the housing.
  • the current collecting member is connected to the inner surface of the casing, so that the current collecting member and the casing have a larger contact area, which can effectively improve the firmness of the connection of the current collecting member to the casing.
  • the outer surface of the end cover is disposed opposite to the inner surface of the housing; at least a part of the current collecting member is located between the outer surface of the end cover and the inner surface of the housing, The end cap is configured to press a part of the current collecting member against the inner surface of the housing.
  • At least a part of the current collecting member is located between the outer surface of the end cover and the inner surface of the housing, and the end cover presses a part of the current collecting member against the inner surface of the housing, so that the current collecting member is tightly connected to the housing.
  • the contact improves the firmness of the connection of the current collecting member to the casing.
  • the current collecting member includes a first connecting portion and a second connecting portion; in the thickness direction of the end cap, at least a part of the first connecting portion is located between the end cap and the electrode assembly. Between, the first connecting part is configured to be connected to the electrode assembly; the second connecting part is connected to the first connecting part, and from the first connecting part along the thickness direction of the end cap Extending away from the electrode assembly, the second connection portion is configured to connect with the case.
  • the current collecting member includes a first connecting portion and a second connecting portion connected to each other, and in the thickness direction of the end cap, at least a part of the first connecting portion is located between the end cap and the electrode assembly, so that the first connecting portion Connect with electrode assembly.
  • the second connecting portion extends away from the electrode assembly along the thickness direction of the end cap from the first connecting portion, so as to facilitate the connection of the second connecting portion with the casing.
  • the second connecting portion is an annular structure connected to the outer edge of the first connecting portion.
  • the second connecting part is an annular structure connected to the outer edge of the first connecting part, which is easy to shape and manufacture, so that the second connecting part and the housing have a larger contact area.
  • the casing is provided with a limiting portion at one end of the opening; the limiting portion is configured to restrict the end cap from detaching from the casing in a direction away from the electrode assembly.
  • a limiting portion is provided at one end of the opening of the casing, and the limiting portion acts as a restriction on the end cap, so as to restrict the end cap from leaving the casing in a direction away from the electrode assembly.
  • At least a part of the end cap is located between the limiting portion and the current collecting member, and the limiting portion and the current collecting member jointly limit movement of the end cap in the thickness direction of the end cap.
  • At least a part of the end cover is located between the limiting part and the current collecting member, and both the limiting part and the current collecting member can limit the end cover, so as to limit the movement in the thickness direction.
  • the inner surface of the housing includes a stepped surface; in the thickness direction of the end cap, at least a part of the end cap is located between the limiting portion and the stepped surface, and the limiting portion The position part and the stepped surface jointly limit the movement of the end cap in the thickness direction of the end cap.
  • the end cover in the thickness direction of the end cover, at least a part of the end cover is located between the stopper and the step surface of the housing, and both the stopper and the step surface can limit the end cover to limit the end cover. movement in the thickness direction.
  • the limiting portion is an annular structure.
  • the limiting part has an annular structure, which is easy to form and manufacture, and the limiting part can limit the end cover all around, ensuring the limiting ability of the limiting part to the end cover.
  • the limiting portion is a flange structure in which the housing is partially folded inward.
  • the limiting portion is a flange structure in which the shell is partially folded inward, that is to say, by turning over the shell, the limiting portion can be formed at the opening position of the shell, and the molding is simple.
  • the current collecting member can be accommodated in the case first and connected to the electrode assembly and the case, then the end cover is closed to the opening of the case, and finally the case is formed by turning over the case Limiting portion to limit the end cap.
  • the inner surface of the case includes a stepped surface; the current collecting member abuts against the stepped surface in a direction facing the electrode assembly.
  • the current collecting member abuts against the stepped surface of the casing along the direction facing the electrode assembly, and the step faces the current collecting member to restrict the movement of the current collecting member along the direction facing the electrode assembly. After the current-collecting member is pressed against the step surface, the current-collecting member can be connected to the casing, and the installation of the current-collecting member can be realized conveniently.
  • the battery cell further includes a sealing member; the end cover and the casing are sealed and connected through the sealing member.
  • the end cover and the housing are sealed and connected through a sealing member, so as to ensure the sealing performance of the end cover and the housing.
  • the seal is configured to insulate the housing from the end cap.
  • the sealing member insulates and isolates the housing from the end cover, that is to say, the sealing member not only plays a sealing role between the housing and the end cover, but also plays an insulating role, ensuring the connection between the end cover and the housing While improving the sealing performance, the risk of electrification of the end cover is reduced.
  • the seal is configured to wrap around the end cap along the circumference of the opening.
  • the seal is covered on the end cover along the circumferential direction of the opening of the housing.
  • the sealing performance of the seal on the end cover and the housing is improved, and on the other hand, the seal between the seal and the housing is improved.
  • the sealing member can be coated on the end cover first, and then the end cover and the sealing member can be installed in the casing as a whole.
  • the housing is provided with a limiting portion at one end of the opening, and in the thickness direction of the end cover, at least a part of the sealing member is located between the end cover and the limiting portion , so as to realize the sealing connection between the end cover and the housing.
  • the limiting part acts as a limit on the end cover, so as to limit the end cover from detaching from the casing in a direction away from the electrode assembly.
  • At least a part of the sealing member is located between the end cover and the limiting part, so as to realize the sealing connection between the end cover and the housing and ensure good sealing between the end cover and the housing.
  • the sealing member includes a surrounding body and a third connecting portion, the third connecting portion is connected to the surrounding body; at least a part of the end cap is located in the surrounding body, and the end cap In the thickness direction, the third connection part is located between the end cover and the limiting part, so as to realize the sealing connection between the end cover and the housing.
  • the sealing member includes a surrounding body and a third connecting part connected to each other, at least a part of the end cap is located in the surrounding body, and the third connecting part is located between the end cap and the limiting part.
  • the structure of the sealing part is simple. While being well sealed with the shell, the sealing member and the end cover have good integrity.
  • the electrode assembly includes a first tab configured to be connected to the current collecting member; the battery cell further includes an insulator, the thickness of the end cap is Directionally, the insulating member is located between the first tab and the end cover, and the projection of the insulating member along the thickness direction of the end cover covers the first tab.
  • the insulator in the thickness direction of the end cover, the insulator is located between the first tab and the end cover, the projection of the insulator along the thickness direction of the end cover covers the first tab, and the insulator functions to isolate the end cover and the end cover.
  • the function of the first tab reduces the risk of electrification of the end cover.
  • the electrode assembly includes a main body and a first tab, the first tab is a cylindrical structure, one end of the first tab is connected to the main body, and the first tab is connected to the main body. The other end is welded to the current collecting member.
  • the first tab of the electrode assembly has a cylindrical structure, and the end of the first tab away from the main body is welded to the current collecting member.
  • This structure can ensure the firmness of the connection between the first tab and the current collecting member, simplifying the The connection process of the first tab and the current collecting member.
  • the current collecting member is welded to the housing.
  • the current collecting member is welded to the housing, and the connection between the current collecting member and the housing is simple, which can ensure the firmness of the connection between the current collecting member and the housing.
  • the melting point of the current collecting member is lower than the melting point of the housing.
  • the melting point of the current collecting member is lower than the melting point of the housing, and when the current collecting member is welded into the housing from the inside of the housing, the housing is less likely to be broken down, effectively reducing the chance of liquid leakage from the housing. risk.
  • the battery cell further includes a pressure relief mechanism; the pressure relief mechanism is disposed on the end cap, and the pressure relief mechanism is configured to be used when the internal pressure or temperature of the battery cell reaches a threshold value. actuated to relieve the internal pressure.
  • a pressure relief mechanism is provided on the end cap, and the pressure relief mechanism can be activated to release the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value, so as to improve the safety of the battery cell.
  • an embodiment of the present application provides a battery, including a plurality of battery cells provided in any one embodiment of the first aspect.
  • an embodiment of the present application provides an electric device, including a plurality of battery cells provided in any one embodiment of the first aspect.
  • an embodiment of the present application provides a method for manufacturing a battery cell, including: providing a housing having an opening; providing an electrode assembly; providing an end cap; providing a current collecting member; connecting the current collecting member to the electrode assembly; accommodating the electrode assembly and the current collecting member in the case; connecting the current collecting member to the case so that the electrode assembly is electrically connected to the case; Covering the end cap on the opening, and sealing the end cap with the casing, so that the current collecting member is located on a side of the electrode assembly facing the end cap.
  • the connecting the current collecting member to the housing includes: welding the current collecting member to the housing from the inside of the housing; wherein, the current collecting member The melting point is lower than the melting point of the housing.
  • the melting point of the current collecting member is lower than the melting point of the casing, and the current collecting member is welded to the casing from the inside of the casing, so that the casing is not easy to be broken down, and the possibility of liquid leakage from the casing is effectively reduced. risk.
  • the manufacturing method further includes: after the end cover is closed on the opening, flanging the shell so that the shell is formed at the end where the opening is located. A limiting portion, such that the limiting portion restricts the end cap from detaching from the casing in a direction away from the electrode assembly.
  • the housing is flanged, so that the housing can form a stopper at the end where the opening is set, so as to limit the end cover from moving away from the electrode assembly. out of the case.
  • the limiting portion is formed by flanging, which is simple to implement and can effectively reduce manufacturing costs.
  • the embodiment of the present application also provides a battery cell manufacturing equipment, including:
  • the first providing device is used to provide the casing, and the casing has an opening; the second providing device is used to provide the electrode assembly; the third providing device is used to provide the end cap; the fourth providing device is used to provide the current collector component; an assembly device for connecting a current collecting member to the electrode assembly; accommodating the electrode assembly and the current collecting member in the housing; connecting the current collecting member to the housing to electrically connecting the electrode assembly to the case; closing the end cap on the opening, and sealingly connecting the end cap to the case so that the current collecting member is located in the electrode assembly side facing the end cap.
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Fig. 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
  • Fig. 3 is an exploded view of a battery cell provided by some embodiments of the present application.
  • Fig. 4 is a cross-sectional view of the battery cell shown in Fig. 3;
  • Fig. 5 is a partial enlarged view of A of the battery cell shown in Fig. 4;
  • Fig. 6 is a partially enlarged view of a battery cell provided in some other embodiments of the present application.
  • Fig. 7 is a partially enlarged view of a battery cell provided by some further embodiments of the present application.
  • Fig. 8 is a partial view of the battery cell shown in Fig. 4;
  • FIG. 9 is a partial view of a battery cell provided by other embodiments of the present application.
  • FIG. 10 is a flowchart of a method for manufacturing a battery cell provided in some embodiments of the present application.
  • Fig. 11 is a flow chart of a method for manufacturing a battery cell provided in some other embodiments of the present application.
  • Fig. 12 is a schematic block diagram of a battery cell manufacturing equipment provided by some embodiments of the present application.
  • connection In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installation”, “connection”, “connection” and “attachment” should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • “Plurality” in this application refers to two or more (including two).
  • the 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, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • 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 this application may include a battery module or a battery pack, and the like.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative plates.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that has been coated with the positive electrode active material layer , the positive electrode current collector not coated with the positive electrode active material layer is used as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode collector that has been coated with the negative electrode active material layer , the negative electrode current collector not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon.
  • the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
  • the material of the isolation film may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • the protection measures include at least the switching element, the selection of an appropriate isolation diaphragm material, and the pressure relief mechanism.
  • the switching element refers to an element that can stop charging or discharging the battery when the temperature or resistance inside the battery cell reaches a certain threshold.
  • the separator is used to isolate the positive electrode and the negative electrode. When the temperature rises to a certain value, it can automatically dissolve the micron-scale (or even nano-scale) micropores attached to it, so that metal ions cannot pass through the separator and terminate the battery. The internal reaction of the monomer.
  • the pressure relief mechanism refers to an element or part that is activated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold.
  • the threshold design varies according to design requirements. The threshold may depend on the materials of one or more of the positive pole piece, the negative pole piece, the electrolyte and the separator in the battery cell.
  • the pressure relief mechanism can take the form of an explosion-proof valve, a burst disk, an air valve, a pressure relief valve, or a safety valve, and can specifically use a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell When the predetermined threshold is reached, the pressure relief mechanism performs an action or the weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for internal pressure or temperature release.
  • the "activation" mentioned in this application means that the pressure relief mechanism is activated or activated to a certain state, so that the internal pressure and temperature of the battery cells can be released.
  • Actions by the pressure relief mechanism may include, but are not limited to, at least a portion of the pressure relief mechanism rupture, shatter, be torn, or open, among others.
  • the pressure relief mechanism When the pressure relief mechanism is actuated, the high-temperature and high-pressure material inside the battery cell will be discharged from the actuated part as discharge. In this way, the pressure and temperature of the battery cells can be released under the condition of controllable pressure or temperature, so as to avoid potential more serious accidents.
  • the emissions from battery cells mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrodes, fragments of separator, high temperature and high pressure gas generated by reaction, flame, etc.
  • the pressure relief mechanism on the battery cell has an important impact on the safety of the battery. For example, when a short circuit, overcharge, etc. occur, it may cause thermal runaway inside the battery cell, resulting in a sudden increase in pressure or temperature. In this case, the internal pressure and temperature can be released to the outside through the actuation of the pressure relief mechanism, so as to prevent the battery cells from exploding and igniting.
  • the electrode assembly For a general battery cell, the electrode assembly needs to be electrically connected to the casing so that the casing can serve as the positive or negative output pole of the battery cell. Currently, it is inconvenient to electrically connect the electrode assembly to the casing.
  • the embodiment of the present application provides a technical solution.
  • the current collecting member By arranging the current collecting member on the side of the electrode assembly facing the end cover, the electrode assembly and the casing are electrically connected through the current collecting member, and the end cover is closed on the opening of the casing. , The end cover is tightly connected with the shell.
  • the current collecting member can be connected to the casing inside the casing, which can ensure the firmness of the connection between the current collecting member and the casing.
  • the end cover is closed on the opening of the shell and sealed with the shell, so that the electrical connection between the electrode assembly and the shell is more convenient.
  • Electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles;
  • spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.;
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.;
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
  • the embodiment of the present application does not impose special limitations on the above electric equipment.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • a battery 100 is disposed inside the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
  • the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 to provide driving power for the vehicle 1000 instead of or partially replacing fuel oil or natural gas.
  • FIG. 2 is a schematic structural diagram of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a plurality of battery cells 10 . Multiple battery cells 10 may be connected in series, in parallel or in parallel. Wherein, the mixed connection means that the plurality of battery cells 10 are both connected in series and in parallel.
  • the battery 100 may also include a confluence component (not shown in the figure), and multiple battery cells 10 may be electrically connected through the confluence component, so as to realize the series connection, parallel connection or mixed connection of multiple battery cells 10 . couplet.
  • the bus component may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, and the like.
  • the battery cell 10 may further include a case body 20 for accommodating the battery cell 10 .
  • the box body 20 may include a first part 21 and a second part 22 , and the first part 21 and the second part 22 cover each other to define an accommodating space 23 for accommodating the battery cells 10 .
  • the connection between the first part 21 and the second part 22 can be sealed by a sealing element (not shown in the figure), and the sealing element can be a sealing ring, a sealant, or the like.
  • first part 21 and the second part 22 can be in various shapes, such as cuboid, cylinder and so on.
  • the first part 21 can be a hollow structure with one side open
  • the second part 22 can also be a hollow structure with one side open. Box 20.
  • the first part 21 may also be a hollow structure with one side open
  • the second part 22 may be a plate-like structure
  • the second part 22 covers the open side of the first part 21 to form a box body 20 with an accommodating space 23 .
  • FIG. 3 is an exploded view of a battery cell 10 provided in some embodiments of the present application.
  • the battery cell 10 may include a casing 11, an electrode assembly 12, an end cap 13, and a current collecting member 14.
  • the casing 11 has Opening 111, the electrode assembly 12 is accommodated in the casing 11, the end cap 13 covers the opening 111, the end cap 13 is sealed with the casing 11, the current collecting member 14 is accommodated in the casing 11, and the current collecting member 14 is located in the electrode assembly 12 facing the side of the end cap 13 , the current collecting member 14 is configured to connect the case 11 and the electrode assembly 12 so that the electrode assembly 12 is electrically connected to the case 11 .
  • the end cap 13 covers the opening 111 of the housing 11 to form a sealed space 112 (not shown in FIG. 3 ) for accommodating the electrode assembly 12 and electrolyte, which may be an electrolyte solution.
  • the current collecting member 14 Since the current collecting member 14 is located on the side of the electrode assembly 12 facing the end cover 13, the electrode assembly 12 and the casing 11 are electrically connected through the current collecting member 14, the end cover 13 covers the opening 111 of the casing 11, and the end cover 13 and the casing Body 11 is hermetically connected.
  • This structure enables the current collecting member 14 to be connected to the housing 11 inside the housing 11 during the process of assembling the battery cell 10, which can ensure the firmness of the connection between the current collecting member 14 and the housing 11.
  • the end cover 13 After the current collecting member 14 is connected to the electrode assembly 12 and the casing 11, the end cover 13 is covered on the opening 111 of the casing 11 and sealed with the casing 11, so that the electrode assembly 12 is connected to the casing 11. Connection is more convenient.
  • the bottom wall of the case 11 is welded together with the tabs, the bottom wall of the case 11 is likely to be damaged during the welding process of the bottom wall of the case 11 and the tabs. In the case of breakdown, liquid leakage will be caused, which will affect the performance of the battery cell 10 .
  • the electrode assembly 12 is electrically connected to the casing 11 through the current collecting member 14, the end cover 13 is sealed and connected to the casing 11, the electrode assembly 12 is not directly connected to the end cover 13, and the battery cell 10 The situation of liquid leakage from the end cap 13 is not easy to occur.
  • the battery cell 10 may further include a seal 15 through which the end cover 13 and the housing 11 are sealed and connected to ensure the sealing performance between the end cover 13 and the housing 11 .
  • the sealing member 15 is configured to insulate and isolate the housing 11 from the end cover 13, that is to say, the sealing member 15 not only plays a sealing role but also plays an insulating role between the housing 11 and the end cover 13, while ensuring the sealing performance between the end cover 13 and the housing 11 , the risk of electrification of the end cover 13 is reduced.
  • the sealing member 15 can be made of rubber, plastic, etc., and the end cap 13 can be made of metal, such as copper, iron, aluminum, steel, aluminum alloy, and the like.
  • the end cover 13 and the housing 11 can also be tightly fitted to achieve sealing, for example, an interference fit is formed between the end cover 13 and the housing 11 to realize the sealing between the end cover 13 and the housing 11. sealed connection.
  • the end cap 13 can be made of insulating material, so as to reduce the risk of the end cap 13 being electrified.
  • the battery cell 10 may further include a pressure relief mechanism 16 disposed on the end cap 13, and the pressure relief mechanism 16 is configured to be activated when the internal pressure or temperature of the battery cell 10 reaches a threshold value. The internal pressure is released to improve the safety of the battery cell 10 .
  • the pressure relief mechanism 16 may be a component such as an explosion-proof valve, a burst disk, an air valve or a pressure relief valve.
  • FIG. 3 the case where the pressure relief mechanism 16 is an explosion-proof disc is exemplarily shown, and the burst-proof disc can be bonded to the end cover 13 .
  • the end cap 13 When the thermal runaway of the battery cell 10 discharges the discharge through the pressure relief mechanism 16, the end cap 13 may be charged. If one of the end cap 13 and the casing 11 is positively charged and the other is negatively charged, the As a result, the battery cells 10 are short-circuited.
  • the sealing member 15 insulates the casing 11 from the end cover 13 to effectively reduce the risk of short circuit.
  • the housing 11 may be in various shapes, such as a cylinder, a cuboid, and the like.
  • the shape of the casing 11 can be determined according to the specific shape of the electrode assembly 12 .
  • the housing 11 can be a cylindrical structure; if the electrode assembly 12 is a cuboid structure, the housing 11 can be a cuboid structure.
  • the casing 11 is a hollow cylinder structure
  • the electrode assembly 12 is a cylinder structure.
  • the housing 11 can also be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, and the like.
  • housing 11 may have a higher melting point than end cap 13 .
  • the shell 11 is made of steel, and the end cover 13 is made of aluminum.
  • the end cap 13 When the battery cell 10 is thermally out of control, because the melting point of the end cap 13 is lower than that of the casing 11, the end cap 13 is more likely to melt, reducing the possibility of the battery cell 10 bursting and impacting other battery cells 10, deforming the entire battery 100 Even the risk of high voltage failure.
  • FIG. 4 is a cross-sectional view of the battery cell 10 shown in FIG.
  • the other end of 113 is connected to the output part 114
  • the cylinder 113 is connected to the current collecting member 14
  • the output part 114 is electrically connected to the electrode assembly 12 .
  • One of the cylinder body 113 and the output portion 114 is the positive output pole of the battery cell 10
  • the other is the negative output pole of the battery cell 10 .
  • the pressure relief mechanism 16 is arranged on the end cover 13, it can be understood that the pressure relief mechanism 16 and the output part 114 are located on opposite sides of the housing 11, and the pressure relief mechanism 16 does not occupy the space of the output part 114.
  • the structure can ensure that the output part 114 has a larger contact area with the confluence component, thereby improving the flow capacity. Taking the welding of the current-combining component and the output part 114 as an example, the output part 114 and the current-combining component have a larger welding area.
  • the cylinder body 113 is a cylindrical structure
  • the output part 114 is a plate-shaped structure.
  • the end cap 13 is used to cover the opening 111 at the end of the barrel 113 away from the output portion 114 , and the end cap 13 may be a circular plate-shaped structure adapted to the barrel 113 .
  • the cylinder body 113 is formed with a flange portion 1131 at the end away from the opening 111, the cylinder body 113 is partially concaved to form a first stopper protrusion 1132, and the cylinder body 113 forms a constriction at the position of the first stopper protrusion 1132. neck structure.
  • the flange portion 1131 and the first limiting protrusion 1132 are respectively located on both sides of the output portion 114, and the flange portion 1131 and the first limiting protrusion 1132 jointly limit the output portion 114 on the end cover. movement in the thickness direction.
  • both the flange portion 1131 and the first limiting protrusion 1132 are ring structures.
  • the output portion 114 may be a positive output pole, and the barrel 113 may be a negative output pole; or the barrel 113 may be a negative output pole, and the output portion 114 may be a positive output pole.
  • the positive output pole and the negative output pole are the parts of the battery cell 10 used to connect with other components and output the electric energy of the battery cell 10 . Taking two battery cells 10 to be electrically connected through a confluence component to realize the series connection of two battery cells 10 as an example, the positive output pole of one battery cell 10 and the negative output pole of the other battery cell 10 can be connected to the confluence component. welding.
  • the positive output pole and the negative output pole of the battery cell 10 are insulated, so the cylinder body 113 and the output portion 114 are insulated and connected.
  • the cylinder body 113 and the output part 114 can be insulated and isolated by the insulating unit 17 .
  • the insulation unit 17 can be made of rubber, plastic and other materials.
  • the electrode assembly 12 may include a main body 121 and a tab extending from the main body 121 .
  • the main body 121 may include a positive electrode tab, a negative electrode tab, and a separator.
  • the main body 121 may be a winding structure formed by winding the positive pole piece, the separator and the negative pole piece.
  • the main body 121 may also be a laminated structure formed by stacking the positive pole piece, the separator and the negative pole piece.
  • the positive electrode sheet includes a positive electrode collector and a positive electrode active material layer coated on opposite sides of the positive electrode collector.
  • the negative electrode sheet includes a negative electrode current collector and negative electrode active material layers coated on opposite sides of the negative electrode current collector.
  • the main body 121 is the part of the electrode assembly 12 corresponding to the area of the pole piece coated with the active material layer, and the tab is the area of the pole piece not coated with the active material layer.
  • the tab can be divided into a first tab 122 and a second tab 123, and the first tab 122 can be connected to the current collecting member 14 to realize the electrical connection between the electrode assembly 12 and the cylinder body 113 of the housing 11; 123 may be connected to the output part 114 to realize the electrical connection between the electrode assembly 12 and the output part 114 .
  • the first tab 122 may be a cylindrical structure, one end of the first tab 122 is connected to the main body 121 , and the other end of the first tab 122 is welded to the current collecting member 14 .
  • This structure can ensure the firmness of the connection between the first tab 122 and the current collecting member 14 , and simplify the connection process between the first tab 122 and the current collecting member 14 .
  • the second tab 123 can also be a cylindrical structure, one end of the second tab 123 is connected to the main body 121 , and the other end of the second tab 123 is welded to the output part 114 .
  • This structure can ensure the firmness of the connection between the second tab 123 and the output part 114 , and simplify the connection process between the second tab 123 and the output part 114 .
  • One of the first tab 122 and the second tab 123 is a positive tab, and the other is a negative tab.
  • the positive electrode lug is the area on the positive electrode sheet that is not coated with the positive electrode active material layer.
  • the negative electrode tab is the area on the negative electrode sheet that is not coated with the negative electrode active material layer.
  • first tab 122 is a positive tab
  • second tab 123 is a negative tab
  • the cylinder 113 is a positive output pole
  • the output part 114 is a negative output pole
  • first tab 122 is the negative pole tab
  • second pole piece is the positive pole tab
  • barrel 113 is the negative output pole
  • the output part 114 is the positive output pole
  • the current collecting member 14 may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy and the like.
  • the current collecting member 14 can be connected with the housing 11 in various ways. For example, the current collecting member 14 is welded to the casing 11 , and for another example, the current collecting member 14 is bonded to the casing 11 by conductive glue.
  • the current collecting member 14 is welded to the housing 11 , and the melting point of the current collecting member 14 is lower than that of the housing 11 .
  • the melting point of the case 11 is 1500°C
  • the melting point of the current collecting member 14 is 660°C.
  • the welding temperature can be selected between 660°C and 1500°C.
  • the temperature between °C, for example, the welding temperature is 800 °C, which does not reach the melting point of the shell 11, and the shell 11 is not easy to be broken down during the welding process.
  • the melting point of the current collecting member 14 is lower than the melting point of the barrel 113 of the case 11 .
  • FIG. 5 is a partial enlarged view of A of the battery cell 10 shown in FIG.
  • the member 14 has a larger contact area with the housing 11 , which can effectively improve the firmness of the connection of the current collecting member 14 to the housing 11 and improve the flow capacity.
  • the inner surface 115 of the casing 11 is the surface formed by the movement of the generatrix along the circumferential direction of the opening 111 of the casing 11 , and the generatrix here refers to the line arranged along the thickness direction Z of the end cover 13 .
  • the inner surface 115 of the shell 11 is the inner circumferential surface of the shell 11 .
  • the current collecting member 14 is welded to the inner surface 115 of the casing 11 .
  • the outer surface 131 of the end cover 13 is opposite to the inner surface 115 of the housing 11 .
  • At least a part of the current collecting member 14 is located between the outer surface 131 of the end cover 13 and the inner surface 115 of the housing 11, and the end cover 13 is configured to press a part of the current collecting member 14 against the inner surface 115 of the housing 11, so as to Making the current collecting member 14 in close contact with the housing 11 improves the firmness of the connection of the current collecting member 14 to the housing 11 .
  • the end cover 13 presses a part of the current collecting member 14 against the inner surface 115 of the housing 11, and the end cover 13 may directly press a part of the current collecting member 14 against the inner surface 115 of the housing 11, That is, the end cover 13 directly abuts against the current collecting member 14; it may also be that the end cover 13 indirectly presses a part of the current collecting member 14 against the inner surface 115 of the housing 11, that is, the end cover 13 and the current collecting member 14 indirectly abut, such as , under the condition that the end cover 13 and the casing 11 are sealed and connected through the sealing member 15 , the end cover 13 indirectly abuts against the current collecting member 14 through the sealing member 15 .
  • the current collecting member 14 includes a first connecting portion 141 and a second connecting portion 142, and in the thickness direction Z of the end cap 13, at least a part of the first connecting portion 141 is located between the end cap 13 and the electrode assembly 12 , the first connection part 141 is configured to be connected to the electrode assembly 12 to realize the electrical connection of the current collecting member 14 and the electrode assembly 12 .
  • the second connecting portion 142 is connected to the first connecting portion 141 and extends from the first connecting portion 141 away from the electrode assembly 12 along the thickness direction Z of the end cap 13 , and is configured to be connected to the casing 11 .
  • the current collecting member 14 has a simple structure, is easy to form and manufacture, and can be conveniently connected to the electrode assembly 12 and the casing 11 .
  • first connecting portion 141 is used to connect with the first tab 122 of the electrode assembly 12 , for example, the first connecting portion 141 is welded to the first tab 122 .
  • the second connecting portion 142 may be connected to the inner surface 115 of the casing 11 , for example, the second connecting portion 142 is welded to the inner surface 115 of the casing 11 .
  • the end cover 13 presses the second connection portion 142 of the current collecting member 14 against the inner surface 115 of the housing 11 through the seal 15 to improve the connection of the current collecting member 14 to the housing 11 of firmness.
  • the second connecting portion 142 is an annular structure connected to the outer edge of the first connecting portion 141 , this structure enables the current collecting member 14 to be formed by stamping, and the forming is simple and convenient.
  • the ring-shaped second connecting portion 142 has a larger contact area with the housing 11 , which is beneficial to improve the flow capacity.
  • the inner surface of the casing 11 includes a stepped surface 116, and the current collecting member 14 abuts against the stepped surface 116 along the direction facing the electrode assembly 12, and the stepped surface 116 acts as a limit to the current collecting member 14 to limit The current collecting member 14 moves in a direction facing the electrode assembly 12 .
  • the current collecting member 14 can be connected to the casing 11 , and the installation of the current collecting member 14 can be realized conveniently.
  • the stepped surface 116 is connected to the inner surface 115 of the housing 11 , and may be that the first connecting portion 141 of the current collecting member 14 abuts against the stepped surface 116 along a direction facing the electrode assembly 12 .
  • the current collecting member 14 may be connected to the inner surface 115 of the casing 11 .
  • the current collecting member 14 may not be connected to the inner surface 115 of the casing 11, but to abut against the step surface 116 and be connected together.
  • the first connecting portion 141 of the current collecting member 14 is welded to the step The surface 116 and the second connection portion 142 of the current collecting member are in contact with the inner surface 115 of the casing 11 but are not connected together.
  • the casing 11 is provided with a limiting portion 117 at one end of the opening 111, and the limiting portion 117 is configured to restrict the end cap 13 from leaving the casing 11 in a direction away from the electrode assembly 12, and also That is to say, the limiting portion 117 acts to restrict the end cap 13 , and restricts the end cap 13 from detaching from the housing 11 in a direction away from the electrode assembly 12 .
  • the limiting portion 117 is located at an end of the cylinder body 113 of the casing 11 away from the output portion 114 .
  • the limiting portion 117 can be a flange structure in which the housing 11 is partially folded inward, that is, the limiting portion 117 can be formed at the position of the opening 111 of the housing 11 by folding the housing 11 , and the molding is simple.
  • the current collecting member 14 can be accommodated in the casing 11 and connected to the electrode assembly 12 and the casing 11, and then the end cap 13 is covered on the opening 111 of the casing 11, and finally Then, the limiting portion 117 is formed by turning over the housing 11 to limit the end cover 13 .
  • the limiting portion 117 may be configured as an annular structure.
  • the ring-shaped limiting portion 117 is easier to achieve sealing with the end cover 13 .
  • the end cap 13 in the thickness direction Z of the end cap 13, at least a part of the end cap 13 is located between the limiting portion 117 and the current collecting member 14, and the limiting portion 117 and the current collecting member 14 jointly limit the thickness of the end cap 13.
  • the movement in the direction Z makes it difficult for the end cover 13 to move in the casing 11 along the thickness direction Z of the casing 11 .
  • a part of the end cap 13 is located between the limiting portion 117 and the first connecting portion 141 of the current collecting member 14 .
  • Both the limiting portion 117 and the current collecting member 14 play a limiting role on the end cover 13 .
  • the current collecting member 14 can be directly or indirectly abutted against the end cap 13
  • the stopper 117 can be directly or indirectly abutted against the end cap 13 to limit the movement of the end cap 13 in the thickness direction Z.
  • the end cap 13 abuts against the limiting portion 117 through the sealing member 15 .
  • the end cover 13 in the thickness direction Z of the end cover 13, at least a part of the end cover 13 is located between the limiting portion 117 and the stepped surface 116, and the limiting portion 117 and the stepped surface 116 jointly limit the end cover 13 in the thickness direction.
  • the movement of Z makes it difficult for the end cover 13 to move along the thickness direction Z of the housing 11 in the housing 11 .
  • Both the limiting portion 117 and the stepped surface 116 play a limiting role on the end cover 13 .
  • the limiting portion 117 can directly or indirectly abut against the end cap 13
  • the stepped surface 116 can directly or indirectly abut against the end cap 13 to limit the movement of the end cap 13 in the thickness direction Z.
  • the seal 15 can cover the end cover 13 along the circumference of the opening 111 of the housing 11 .
  • this structure improves the sealing performance of the sealing member 15 on the end cover 13 and the housing 11, and on the other hand, improves the integrity of the sealing member 15 and the housing 11.
  • the sealing member 15 can be coated on the end cover 13 first, and then the end cover 13 and the sealing member 15 are installed in the casing 11 as a whole.
  • the limit portion 117 when the limit portion 117 is provided at one end of the opening 111 of the housing 11 , in the thickness direction Z of the end cover 13 , at least a part of the seal 15 is located between the end cover 13 and the limit portion 117 , so as to realize the sealing connection between the end cover 13 and the housing 11 and ensure good sealing between the end cover 13 and the housing 11 .
  • the sealing member 15 may include a surrounding body 151 and a third connecting portion 152 , and the third connecting portion 152 is connected to the surrounding body 151 . At least a part of the end cap 13 is located in the enclosure 151, and in the thickness direction Z of the end cap 13, the third connecting portion 152 is located between the end cap 13 and the limiting portion 117, so as to realize the sealing connection between the end cap 13 and the housing 11 .
  • the sealing member 15 can cover the end cover 13 along the circumferential direction of the opening 111 of the housing 11 . Since the third connection part 152 is located between the end cover 13 and the limiting part 117, the sealed connection between the end cover 13 and the housing 11 is realized, even if the current collecting member 14 and the end cover 13 are not sealed, the end cover 13 and the shell There will be no leakage between the bodies 11.
  • the overall structure of the sealing member 15 is simple, and while achieving good sealing between the end cover 13 and the housing 11 , the sealing member 15 and the end cover 13 have good integrity.
  • the surrounding body 151 and the third connecting portion 152 of the sealing member 15 can both play an insulating role between the end cover 13 and the housing 11 .
  • the end cover 13 presses the second connecting portion 142 of the current collecting member 14 against the inner surface 115 of the casing 11 through the surrounding body 151 of the sealing member 15 .
  • Both the third connecting portion 152 and the limiting portion 117 are annular structures, and the inner diameter of the third connecting portion 152 is smaller than the inner diameter of the limiting portion 117 .
  • FIG. 6 is a partial enlarged view of the battery cell 10 provided in some other embodiments of the present application.
  • the portion 152 and the fourth connection portion 153 are sequentially connected.
  • the end cap 13 includes a body portion 132 and an extension portion 133, the extension portion 133 extends from the body portion 132 in a direction away from the electrode assembly 12, the enclosure 151 is located outside the extension portion 133, and the fourth connecting portion 153 is located inside the extension portion 133, In the thickness direction Z of the end cover 13 , the third connecting portion 152 is located between the extension portion 133 and the limiting portion 117 .
  • the limiting portion 117 is provided with a bending portion 118 , the bending portion 118 is bent toward the electrode assembly 12 relative to the limiting portion 117 , and the fourth connecting portion 153 is located between the extension portion 133 and the bending portion 118 .
  • the limiting part 117 presses the third connecting part 152 to the extension part 133
  • the bending part 118 presses the fourth connecting part 153 to the extension part 133 .
  • This structure can further improve the sealing between the end cover 13 and the housing 11 .
  • the third connecting portion 152 , the limiting portion 117 and the fourth connecting portion 153 are all ring structures.
  • the casing 11 may be provided with a stepped surface 116 or may not be provided with the stepped surface 116 .
  • the casing 11 is not provided with a stepped surface 116 .
  • the sealing member 15 is not limited to the above structure, and the sealing member 15 may also have other structures.
  • the sealing member 15 only includes a surrounding body 151, which is an open structure at both ends. 115 , or the enclosure 151 abuts against the outer surface 131 of the end cap 13 and the second connection portion 142 of the current collecting member 14 , so as to realize the sealing between the casing 11 and the end cap 13 .
  • the sealing member 15 only includes a third connecting portion 152, and in the thickness direction Z of the end cover 13, the third connecting portion 152 is located between the limiting portion 117 and the end cover 13, so that the housing 11 and the end cover 13 of the seal.
  • the stepped surface 116 of the casing 11 may have various forms.
  • a part of the housing 11 protrudes laterally near the opening 111, so that the inner diameter of the protruding part of the housing 11 is greater than the inner diameter of the non-protruding part of the housing 11, thereby forming a stepped surface 116;
  • FIG. 7 is a partial enlarged view of the battery cell 10 provided by some other embodiments of the present application.
  • the position of the protrusion 119 forms a necking structure, and the second limiting protrusion 119 is used to limit the movement of the main body 121 of the electrode assembly 12 toward the direction close to the end cap 13, and the second limiting protrusion 119 is formed on a side away from the electrode assembly 12 Step surface 116.
  • the second limiting protrusion 119 is a ring structure.
  • FIG. 8 is a partial view of the battery cell 10 shown in FIG. 18 is located between the first tab 122 and the end cover 13 , and the projection of the insulating member 18 along the thickness direction Z of the end cover 13 covers the first tab 122 .
  • the insulator 18 functions to isolate the end cover 13 from the first tab 122 , reducing the risk of the end cover 13 being electrified.
  • the projection of the insulating member 18 along the thickness direction Z of the end cover 13 covers the first tab 122, that is, the projection of the insulating member 18 along the thickness direction Z of the end cover 13 covers the end surface of the first tab 122 away from the main body 121 (the first tab 122 is connected to the end face of the current collecting member 14).
  • the projection of the insulating member 18 along the thickness direction Z of the end cover 13 covers the annular end surface of the first tab 122 away from the main body 121 .
  • the insulating member 18 can be made of materials such as rubber and plastic.
  • the insulator 18 is at least partially located between the current collecting member 14 and the end cover 13 to insulate the current collecting member 14 from the end cover 13 .
  • the insulator 18 is partially located between the first connection portion 141 of the current collecting member 14 and the end cap 13 to insulate the current collecting member 14 from the end cap 13 .
  • the insulator 18 is provided with a first through hole 181
  • the first connecting portion 141 is provided with a second through hole 143
  • both the first through hole 181 and the second through hole 143 lead to the central hole 124 of the main body 121 of the electrode assembly 12
  • the first through hole 181 and the second through hole 143 are arranged opposite to the pressure relief mechanism 16, so as to release the pressure inside the battery cell 10 through the pressure relief mechanism 16 when the internal pressure or temperature of the battery cell 10 reaches a threshold value .
  • both the insulating member 18 and the sealing member 15 can be independent of each other, that is, the insulating member 18 and the sealing member 15 are two separate components.
  • FIG. 9 provides a partial view of the battery cell 10 in other embodiments of the present application.
  • Part 15 is manufactured in one piece.
  • the insulator 18 and the third connecting portion 152 are respectively located at both ends of the enclosure 151 , and the insulator 18 and the third connecting portion 152 jointly restrict the end cap 13 from breaking away from the seal 15 .
  • FIG. 10 is a flow chart of a method for manufacturing a battery cell 10 provided in some embodiments of the present application.
  • the manufacturing method includes:
  • S800 Cover the end cap 13 on the opening 111 of the casing 11 , and seal the end cap 13 to the casing 11 , so that the current collecting member 14 is located on the side of the electrode assembly 12 facing the end cap 13 .
  • step S100, step S200, step S300 and step S400 is not limited.
  • step S400 may be performed first, then step S300, then step S200, and then step S100.
  • step S700 may include: welding the current collecting member 14 to the housing 11 from inside the housing 11 ; wherein the melting point of the current collecting member 14 is lower than the melting point of the housing 11 .
  • the current collecting member 14 Since the melting point of the current collecting member 14 is lower than the melting point of the casing 11, the current collecting member 14 is welded to the casing 11 from the inside of the casing 11, so that the casing 11 is not easy to be broken down, and the casing 11 is effectively reduced. Risk of leakage.
  • FIG. 11 is a flow chart of a manufacturing method of a battery cell 10 provided in another embodiment of the present application. After the end cap 13 is covered on the opening 111 , the manufacturing method may further include :
  • S900 Flanging the casing 11 to form a limiting portion 117 at one end of the opening 111 of the casing 11 , so that the limiting portion 117 restricts the end cap 13 from the casing 11 in a direction away from the electrode assembly 12 .
  • the limit portion 117 is formed by flanging to limit the end cover 13 from the casing 11 in a direction away from the electrode assembly 12 , which is simple to implement and can effectively reduce manufacturing costs.
  • the embodiment of the present application also provides a battery cell 10 manufacturing equipment 2000, please refer to FIG. 12, FIG. It includes a first providing device 1100 , a second providing device 1200 , a third providing device 1300 , a fourth providing device 1400 and an assembling device 1500 .
  • the first providing device 1100 is used for providing the casing 11 , and the casing 11 has an opening 111 .
  • the second providing device 1200 is used for providing the electrode assembly 12 .
  • the third providing device 1300 is used for providing the end cap 13 .
  • the fourth providing device 1400 is used for providing the current collecting member 14 .
  • the assembly device 1500 is used to connect the current collecting member 14 to the electrode assembly 12; accommodate the electrode assembly 12 and the current collecting member 14 in the casing 11; connect the current collecting member 14 to the casing 11, so that the electrode assembly 12 and the The casing 11 is electrically connected; the end cap 13 is covered on the opening 111 , and the end cap 13 is sealed with the casing 11 , so that the current collecting member 14 is located on the side of the electrode assembly 12 facing the end cap 13 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Computer Hardware Design (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本申请实施例提供了一种电池单体、电池、用电设备及电池单体的制造方法和设备,属于电池技术领域。其中,电池单体包括壳体、电极组件、端盖以及集流构件。壳体具有开口。电极组件容纳于壳体内。端盖盖合于开口,并与壳体密封连接。集流构件容纳于壳体内,并位于电极组件面向端盖的一侧,集流构件被配置为连接壳体和电极组件,以使电极组件与壳体电连接。在组装电池单体的过程中,集流构件可在壳体的内部与壳体连接,可保证集流构件与壳体连接后的牢固性,将集流构件连接于电极组件和壳体后,再将端盖盖合于壳体的开口并与壳体密封连接,使得电极组件与壳体的电连接更为方便。

Description

电池单体、电池、用电设备及电池单体的制造方法和设备 技术领域
本申请涉及电池技术领域,具体而言,涉及一种电池单体、电池、用电设备及电池单体的制造方法和设备。
背景技术
车辆使用较多的电池一般是锂离子电池,锂离子电池作为一种可再充电电池,具有体积小、能量密度高、功率密度高、循环使用次数多和存储时间长等优点。
电池单体一般包括壳体和电极组件,壳体用于容纳电极组件和电解液,电极组件一般包括正极极片和负极极片,通过金属离子(如锂离子)在正极极片和负极极片之间移动来产生电能。
对于一般的电池单体而言,电极组件需要与壳体电连接,以使壳体作为电池单体的正输出极或负输出极,目前,电极组件与壳体实现电连接较为不便。
发明内容
本申请实施例提供一种电池单体、电池、用电设备及电池单体的制造方法和设备,能够更方便地实现电极组件与壳体的电连接。
第一方面,本申请实施例提供一种电池单体,包括:壳体,具有开口;电极组件,容纳于所述壳体内;端盖,盖合于所述开口,并与所述壳体密封连接;以及集流构件,容纳于所述壳体内,并位于所述电极组件面向所述端盖的一侧,所述集流构件被配置为连接所述壳体和电极组件,以使所述电极组件与所述壳体电连接。
上述技术方案中,集流构件位于电极组件面向端盖的一侧,电极组件与壳体通过集流构件电连接,端盖盖合于壳体的开口,端盖与壳体密封连接,这种结构使得在组装电池单体的过程中,集流构件可在壳体的内部与壳体连接,可保证集流构件与壳体连接后的牢固性,将集流构件连接于电极组件和壳体后,再将端盖盖合于壳体的开口并与壳体密封连接,使得电极组件与壳体的电连接更为方便。
在一些实施例中,所述集流构件连接于所述壳体的内侧面。
上述技术方案中,集流构件连接于壳体的内侧面,使得集流构件与壳体具有较大的接触面积,可有效提高集流构件连接于壳体的牢固性。
在一些实施例中,所述端盖的外侧面与所述壳体的内侧面相对设置;所述集流构件至少一部分位于所述端盖的外侧面与所述壳体的内侧面之间,所述端盖被配置为将所述集流构件的一部分抵压于所述壳体的内侧面。
上述技术方案中,集流构件至少一部分位于端盖的外侧面与壳体的内侧面之间,端盖将集流构件的一部分抵压于壳体的内侧面,使得集流构件与壳体紧密接触,提高了集流构件连接于壳体的牢固性。
在一些实施例中,所述集流构件包括第一连接部和第二连接部;在所述端盖的厚度方向上,所述第一连接部至少一部分位于所述端盖与所述电极组件之间,所述第一连接部被配置为与所述电极组件连接;所述第二连接部连接于所述第一连接部,并从所述第一连接部沿所述端盖的厚度方向背离所述电极组件延伸,所述第二连接部被配置为与所述壳体连接。
上述技术方案中,集流构件包括相互连接的第一连接部和第二连接部,在端盖的厚度方向上,第一连接部至少一部分位于端盖与电极组件之间,便于第一连接部与电极组件连接。第二连接部从第一连接部沿端盖的厚度方向背离电极组件延伸,便于第二连接部与壳体连接。集流构件整体结构简单,易于成型制造。
在一些实施例中,所述第二连接部为连接于所述第一连接部的外边缘的环形结构。
上述技术方案中,第二连接部为连接于第一连接部的外边缘的环形结构,易于成型制造,使得第二连接部与壳体具有较大的接触面积。
在一些实施例中,所述壳体在所述开口的一端设置有限位部;所述限位部被配置为限制所述端盖沿背离所述电极组件的方向脱离所述壳体。
上述技术方案中,壳体的开口的一端设置有限位部,限位部对端盖起到限制作用,以限制端盖沿背离电极组件的方向脱离壳体。
在一些实施例中,在所述端盖的厚度方向上,所述端盖至少一部分位于所述限位部与所述集流构件之间,所述限位部与所述集流构件共同限制所述端盖在所述端盖的厚度方向的移动。
上述技术方案中,在端盖的厚度方向上,端盖至少一部分位于限位部与集流构件之间,限位部与集流构件均可对端盖起到限制作用,以限制端盖在厚度方向上的移动。
在一些实施例中,所述壳体的内表面包括台阶面;在所述端盖的厚度方向上,所述端盖至少一部分位于所述限位部与所述台阶面之间,所述限位部与所述台阶面共同限制所述端盖在所述端盖的厚度方向的移动。
上述技术方案中,在端盖的厚度方向上,端盖至少一部分位于限位部与壳体的台阶面之间,限位部与台阶面均可对端盖起到限制作用,以限制端盖在厚度方向上的移动。
在一些实施例中,所述限位部为环形结构。
上述技术方案中,限位部为环形结构,易于成型制造,限位部整周均可对端盖起到限制作用,保证了限位部对端盖的限位能力。
在一些实施例中,所述限位部为所述壳体局部向内翻折的翻边结构。
上述技术方案中,限位部为壳体局部向内翻折的翻边结构,也就是说,通过翻折壳体的方式,则可在壳体的开口位置形成限位部,成型简单。在组装电池单体的过程中,可先将集流构件容纳于壳体内并连接于电极组件和壳体,再将端盖盖合于壳体的开口,最后再通过翻折壳体的方式形成限位部,以限制端盖。
在一些实施例中,所述壳体的内表面包括台阶面;所述集流构件沿面向所述电极组件的方向抵靠于所述台阶面。
上述技术方案中,集流构件沿面向电极组件的方向抵靠于壳体的台阶面,台阶面对集流构件起到限制作用,以限制集流构件沿面向电极组件的方向移动。将集流构件抵靠于台阶面后,则可将集流构件连接于壳体,可方便地实现集流构件的安装。
在一些实施例中,所述电池单体还包括密封件;所述端盖与所述壳体通过所述密封件密封连接。
上述技术方案中,端盖与壳体通过密封件密封连接,以保证端盖与壳体的密封性能。
在一些实施例中,所述密封件被配置为将所述壳体与所述端盖绝缘隔离。
上述技术方案中,密封件将壳体与端盖绝缘隔离,也就是说,密封件在壳体与端盖之间既起到密封作用,又起到绝缘作用,在保证端盖与壳体的密封性能的同时,降低了端盖带电的风险。
在一些实施例中,所述密封件被配置为沿所述开口的周向包覆于所述端盖。
上述技术方案中,密封件沿壳体的开口的周向包覆于端盖,一方面,提高了密封件对端盖和壳体的密封性能,另一方面,提高了密封件与壳体的整体性。在组装电池单体的过程中,可先将密封件包覆于端盖,再将端盖和密封件作为整体再安装于壳体。
在一些实施例中,所述壳体在所述开口的一端设置有限位部,在所述端盖的厚度方向上,所述密封件至少一部分位于所述端盖与所述限位部之间,以实现所述端盖与所述壳体的密封连接。
上述技术方案中,限位部对端盖起到限制作用,以限制端盖沿背离电极组件的方向脱离壳体。密封件至少一部分位于端盖与限位部之间,实现端盖与壳体的密封连接,保证端盖与壳体之间具有良好的密封性。
在一些实施例中,所述密封件包括围体和第三连接部,所述第三连接部连接于所述围体;所述端盖至少一部分位于所述围体内,在所述端盖其厚度方向上,所述第三连接部位于所述端盖与限位部之间,以实现所述端盖与壳体的密封连接。
上述技术方案中,密封件包括相互连接的围体和第三连接部,端盖至少一部分位于围体内,第三连接部位于端盖与限位部之间,密封件结构简单,在实现端盖与壳体良好的密封的同时,使得密封件与端盖具有很好的整体性。
在一些实施例中,所述电极组件包括第一极耳,所述第一极耳被配置为与所述集流构件连接;所述电池单体还包括绝缘件,在所述端盖的厚度方向上,所述绝缘件位于所述第一极耳与所述端盖之间,所述绝缘件沿所述端盖的厚度方向的投影覆盖所述第一极耳。
上述技术方案中,在端盖的厚度方向上,绝缘件位于第一极耳与端盖之间,绝缘件沿端盖的厚度方向的投影覆盖第一极耳,绝缘件起到隔离端盖和第一极耳的作用,降低端盖带电的风险。
在一些实施例中,所述电极组件包括主体和第一极耳,所述第一极耳为筒状结构,所述第一极耳的一端连接于所述主体,所述第一极耳的另一端焊接于所述集流构件。
上述技术方案中,电极组件的第一极耳为筒状结构,第一极耳远离主体的一端焊接于集流构件,这种结构可保证第一极耳与集流构件连接的牢固性,简化第一极耳与集流构件的连接工艺。
在一些实施例中,所述集流构件焊接于所述壳体。
上述技术方案中,集流构件焊接于壳体,集流构件与壳体的连接方式简单,可保证集流构件与壳体连接的牢固性。
在一些实施例中,所述集流构件的熔点低于所述壳体的熔点。
上述技术方案中,集流构件的熔点低于壳体的熔点,在从壳体的内部将集流构件焊接于壳体内时,壳体不易出现被击穿的现象,有效降低壳体漏液的风险。
在一些实施例中,所述电池单体还包括泄压机构;所述泄压机构设置于所述端盖,所述泄压机构被配置为在所述电池单体的内部压力或温度达到阈值时致动以泄放所述内部的压力。
上述技术方案中,端盖上设有泄压机构,泄压机构能够在电池单体内部压力或温度达到阈值时致动以泄放内部的压力,以提高电池单体的安全性。
第二方面,本申请实施例提供一种电池,包括多个第一方面任意一个实施例提供的电池单体。
第三方面,本申请实施例提供一种用电设备,包括多个第一方面任意一个实施例提供的电池单体。
第四方面,本申请实施例提供一种电池单体的制造方法,包括:提供壳体,所述壳体具有开口;提供电极组件;提供端盖;提供集流构件;将集流构件连接于所述电极组件;将所述电极组件和所述集流构件容纳于所述壳体内;将所述集流构件连接于所述壳体,以使所述电极组件与所述壳体电连接;将所述端盖盖合于所述开口,并使所述端盖与所述壳体密封连接,使得所述集流构件位于所述电极组件面向所述端盖的一侧。
在一些实施例中,所述将所述集流构件连接于所述壳体包括:从所述壳体的内部将所述集流构件焊接于所述壳体;其中,所述集流构件的熔点低于所述壳体的熔点。
上述技术方案中,集流构件的熔点低于壳体的熔点,从壳体的内部将集流构件焊接于壳体,使得壳体不易出现被击穿的现象,有效地降低壳体漏液的风险。
在一些实施例中,所述制造方法还包括:在将所述端盖盖合于所述开口后,对所述壳体进 行翻边处理,使所述壳体在设置所述开口的一端形成限位部,使得所述限位部限制所述端盖沿背离所述电极组件的方向脱离所述壳体。
上述技术方案中,在将端盖盖合于壳体的开口后,对壳体进行翻边处理,可使壳体在设置开口的一端形成限位部,以限制端盖沿背离电极组件的方向脱离壳体。通过翻边的方式形成限位部,实现方式简单,可有效降低制造成本。
第五方面,本申请实施例还提供一种电池单体的制造设备,包括:
第一提供装置,用于提供壳体,所述壳体具有开口;第二提供装置,用于提供电极组件;第三提供装置,用于提供端盖;第四提供装置,用于提供集流构件;组装装置,用于将集流构件连接于所述电极组件;将所述电极组件和所述集流构件容纳于所述壳体内;将所述集流构件连接于所述壳体,以使所述电极组件与所述壳体电连接;将所述端盖盖合于所述开口,并使所述端盖与所述壳体密封连接,使得所述集流构件位于所述电极组件面向所述端盖的一侧。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,应当理解,以下附图仅示出了本申请的某些实施例,因此不应被看作是对范围的限定,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图;
图2为本申请一些实施例提供的电池的结构示意图;
图3为本申请一些实施例提供的电池单体的爆炸图;
图4为图3所示的电池单体的剖视图;
图5为图4所示的电池单体的A处局部放大图;
图6为本申请又一些实施例提供的电池单体的局部放大图;
图7为本申请再一些实施例提供的电池单体的局部放大图;
图8为图4所示的电池单体的局部视图;
图9为本申请其他实施例提供电池单体的局部视图;
图10为本申请一些实施例提供的电池单体的制造方法的流程图;
图11为本申请又一些实施例提供的电池单体的制造方法的流程图;
图12为本申请一些实施例提供的电池单体的制造设备的示意性框图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
除非另有定义,本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同;本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本申请;本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形,意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“附接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本申请中字符“/”,一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中,相同的附图标记表示相同的部件,并且为了简洁,在不同实施例中,省略对相同部件的详细说明。应理解,附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸,以及集成装置的整体厚度、长宽等尺寸仅为示例性说明,而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中,电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等,本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等,本申请实施例对此也不限定。电池单体一般按封装的方式分成三种:柱形电池单体、方形电池单体和软包电池单体,本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如,本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括电极组件和电解液,电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层,正极活性物质层涂覆于正极集流体的表面,未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体,未涂敷正极活性物质层的正极集流体作为正极极耳。以锂离子电池为例,正极集流体的材料可以为铝,正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层,负极活性物质层涂覆于负极集流体的表面,未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体,未涂敷负极活性物质层的负极集流体作为负极极耳。负极集流体的材料可以为铜,负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断,正极极耳的数量为多个且层叠在一起,负极极耳的数量为多个且层叠在一起。隔离膜的材质可以为PP(polypropylene,聚丙烯)或PE(polyethylene,聚乙烯)等。此外,电极组件可以是卷绕式结构,也可以是叠片式结构,本申请实施例并不限于此。
电池技术的发展要同时考虑多方面的设计因素,例如,能量密度、循环寿命、放电容量、充放电倍率等性能参数,另外,还需要考虑电池的安全性。
对于电池单体来说,主要的安全危险来自于充电和放电过程,同时还有适宜的环境温度设计,为了有效地避免不必要的损失,对电池单体一般会有至少三重保护措施。具体而言,保护措施至少包括开关元件、选择适当的隔离膜材料以及泄压机构。开关元件是指电池单体内的温度或者电阻达到一定阈值时而能够使电池停止充电或者放电的元件。隔离膜用于隔离正极片和负极片,可以在温度上升到一定数值时自动溶解掉附着在其上的微米级(甚至纳米级)微孔,从而使金属离子不能在隔离膜上通过,终止电池单体的内部反应。
泄压机构是指电池单体的内部压力或温度达到预定阈值时致动以泄放内部压力或温度的元件或部件。该阈值设计根据设计需求不同而不同。所述阈值可能取决于电池单体中的正极极片、负极极片、电解液和隔离膜中一种或几种的材料。泄压机构可以采用诸如防爆阀、防爆片、气阀、泄压阀或安全阀等的形式,并可以具体采用压敏或温敏的元件或构造,即,当电池单体的内部压力或温度达到预定阈值时,泄压机构执行动作或者泄压机构中设有的薄弱结构被破坏,从而形成可供内部压力或温度泄放的开口或通道。
本申请中所提到的“致动”是指泄压机构产生动作或被激活至一定的状态,从而使得电池单体的内部压力及温度得以被泄放。泄压机构产生的动作可以包括但不限于:泄压机构中的至少一部分破裂、破碎、被撕裂或者打开,等等。泄压机构在致动时,电池单体的内部的高温高压物质作 为排放物会从致动的部位向外排出。以此方式能够在可控压力或温度的情况下使电池单体发生泄压及泄温,从而避免潜在的更严重的事故发生。
本申请中所提到的来自电池单体的排放物包括但不限于:电解液、被溶解或分裂的正负极极片、隔离膜的碎片、反应产生的高温高压气体、火焰,等等。
电池单体上的泄压机构对电池的安全性有着重要影响。例如,当发生短路、过充等现象时,可能会导致电池单体内部发生热失控从而压力或温度骤升。这种情况下通过泄压机构致动可以将内部压力及温度向外释放,以防止电池单体爆炸、起火。
对于一般的电池单体而言,电极组件需要与壳体电连接,以使壳体作为电池单体的正输出极或负输出极,目前,电极组件与壳体实现电连接较为不便。
发明人发现,在电池单体中,由于壳体为顶端开口的空心结构,电极组件与壳体电连接,一般是从壳体的外侧将壳体的底壁与电极组件的极耳焊接在一起,以实现电极组件与壳体的电连接,由于极耳位于壳体内部,并无法判断极耳与壳体的底壁的焊接情况,实现电极组件与壳体的电连接较为不便。
鉴于此,本申请实施例提供一种技术方案,通过将集流构件设置在电极组件面向端盖的一侧,电极组件与壳体通过集流构件电连接,端盖盖合于壳体的开口,端盖与壳体密封连接。在组装电池单体的过程中,集流构件可在壳体的内部与壳体连接,可保证集流构件与壳体连接后的牢固性,将集流构件连接于电极组件和壳体后,再将端盖盖合于壳体的开口并与壳体密封连接,使得电极组件与壳体的电连接更为方便。
本申请实施例描述的技术方案适用于电池以及使用电池的用电设备。
用电设备可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等;航天器包括飞机、火箭、航天飞机和宇宙飞船等等;电动玩具包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等;电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具,例如,电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电设备不做特殊限制。
以下实施例为了方便说明,以用电设备为车辆为例进行说明。
请参照图1,图1为本申请一些实施例提供的车辆1000的结构示意图,车辆1000的内部设置有电池100,电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电,例如,电池100可以作为车辆1000的操作电源。
车辆1000还可以包括控制器200和马达300,控制器200用来控制电池100为马达300供电,例如,用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中,电池100不仅仅可以作为车辆1000的操作电源,还可以作为车辆1000的驱动电源,代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
在一些实施例中,请参照图2,图2为本申请一些实施例提供的电池100的结构示意图,电池100包括多个电池单体10。多个电池单体10之间可串联或并联或混联。其中,混联是指多个电池单体10中既有串联又有并联。
在一些实施例中,电池100还可以包括汇流部件(图未示出),多个电池单体10之间可通过汇流部件实现电连接,以实现多个电池单体10的串联或并联或混联。
汇流部件可以是金属导体,比如,铜、铁、铝、钢、铝合金等。
在一些实施例中,电池单体10还可以包括箱体20,箱体20用于容纳电池单体10。箱体20可以包括第一部分21和第二部分22,第一部分21与第二部分22相互盖合,以限定出用于容纳电池单体10的容纳空间23。当然,第一部分21与第二部分22的连接处可通过密封元件(图未示 出)来实现密封,密封元件可以是密封圈、密封胶等。
其中,第一部分21和第二部分22可以是多种形状,比如,长方体、圆柱体等。第一部分21可以是一侧开放的空心结构,第二部分22也可以是一侧开放的空心结构,第二部分22的开放侧盖合于第一部分21的开放侧,则形成具有容纳空间23的箱体20。当然,也可以是第一部分21为一侧开放的空心结构,第二部分22为板状结构,第二部分22盖合于第一部分21的开放侧,则形成具有容纳空间23的箱体20。
请参照图3,图3为本申请一些实施例提供的电池单体10的爆炸图,电池单体10可以包括壳体11、电极组件12、端盖13和集流构件14,壳体11具有开口111,电极组件12容纳于壳体11内,端盖13盖合于开口111,端盖13与壳体11密封连接,集流构件14容纳于壳体11内,集流构件14位于电极组件12面向端盖13的一侧,集流构件14被配置为连接壳体11和电极组件12,以使电极组件12与壳体11电连接。
其中,端盖13盖合于壳体11的开口111,可形成用于容纳电极组件12和电解质的密封空间112(图3未示出),电解质可以是电解液。
由于集流构件14位于电极组件12面向端盖13的一侧,电极组件12与壳体11通过集流构件14电连接,端盖13盖合于壳体11的开口111,端盖13与壳体11密封连接,这种结构使得在组装电池单体10的过程中,集流构件14可在壳体11的内部与壳体11连接,可保证集流构件14与壳体11连接后的牢固性,将集流构件14连接于电极组件12和壳体11后,再将端盖13盖合于壳体11的开口111并与壳体11密封连接,使得电极组件12与壳体11的电连接更为方便。
对于一般的电池单体10而言,由于壳体11的底壁与极耳焊接在一起,在对壳体11的底壁与极耳进行焊接的过程中,容易出现壳体11的底壁被击穿的情况,导致漏液,影响电池单体10性能。而在本申请实施例中,电极组件12与壳体11通过集流构件14实现电连接,端盖13与壳体11密封连接,电极组件12并未与端盖13直接连接,电池单体10不易出现从端盖13漏液的情况。
在一些实施例中,电池单体10还可以包括密封件15,端盖13与壳体11通过密封件15密封连接,以保证端盖13与壳体11的密封性能。
可选地,密封件15被配置为将壳体11与端盖13绝缘隔离,也就是说,密封件15在壳体11与端盖13之间既起到密封作用,又起到绝缘作用,在保证端盖13与壳体11的密封性能的同时,降低了端盖13带电的风险。
密封件15可以是橡胶、塑料等材质,端盖13可以是金属材质,比如,铜、铁、铝、钢、铝合金等。
在另一些实施例中,端盖13与壳体11也可以通过紧密配合的方式来实现密封,比如,端盖13与壳体11之间形成过盈配合,以实现端盖13与壳体11的密封连接。在本实施例中,端盖13可以是绝缘材质,以降低端盖13带电的风险。
在一些实施例中,电池单体10还可以包括泄压机构16,泄压机构16设置于端盖13,泄压机构16被配置为在电池单体10的内部压力或温度达到阈值时致动以泄放内部的压力,以提高电池单体10的安全性。
泄压机构16可以是诸如防爆阀、防爆片、气阀或泄压阀等部件。在图3中,示例性的示出了泄压机构16为防爆片的情况,防爆片可以粘接于端盖13。
电池单体10热失控而通过泄压机构16排出排放物时,端盖13可能会带电,若端盖13与壳体11两者中的一者带正电,另一者带负电,则可能导致电池单体10短路。而密封件15将壳体11与端盖13绝缘隔离可有效降低短路的风险。
在本申请实施例中,壳体11可以是多种形状,比如,圆柱体、长方体等。壳体11的形状可根据电极组件12的具体形状来确定。比如,若电极组件12为圆柱体结构,壳体11则可选用为圆柱体结构;若电极组件12为长方体结构,壳体11则可选用长方体结构。
示例性的,在图3中,壳体11为空心圆柱体结构,电极组件12为圆柱体结构。
壳体11的材质也可以是多种,比如,铜、铁、铝、钢、铝合金等。
在一些实施例中,壳体11的熔点可以高于端盖13的熔点。比如,壳体11为钢材质,端盖13为铝材质。
在电池单体10热失控时,由于端盖13的熔点低于壳体11,端盖13更容易熔化,降低电池单体10爆开冲击其他电池单体10的可能性,使整个电池100变形甚至高压失效的风险。
在一些实施例中,请参照图4,图4为图3所示的电池单体10的剖视图,壳体11可以包括筒体113和输出部114,筒体113一端设置有开口111,筒体113的另一端与输出部114连接,筒体113与集流构件14连接,输出部114与电极组件12电连接。筒体113与输出部114两者中的一者为电池单体10的正输出极,另一者为电池单体10的负输出极。
在泄压机构16设置于端盖13的情况下,可理解的,泄压机构16和输出部114位于壳体11相对的两侧,泄压机构16并未占用输出部114的空间,这种结构可保证输出部114与汇流部件具有较大的接触面积,提高过流能力。以汇流部件与输出部114焊接为例,输出部114与汇流部件具有较大的焊接面积。
示例性的,筒体113为圆柱形结构,输出部114为板状结构。端盖13用于盖合于筒体113远离输出部114的一端的开口111,端盖13可以是与筒体113相适配的圆形板状结构。
可选地,筒体113在远离开口111的一端形成有翻边部1131,筒体113局部内凹形成第一限位凸起1132,筒体113在第一限位凸起1132的位置形成缩颈结构。在端盖13的厚度方向Z,翻边部1131和第一限位凸起1132分别位于输出部114的两侧,翻边部1131和第一限位凸起1132共同限制输出部114在端盖的厚度方向的移动。
示例性的,翻边部1131和第一限位凸起1132均为环形结构。
需要说明的是,在电池单体10中,可以是输出部114为正输出极,筒体113为负输出极;也可以是筒体113为负输出极,输出部114为正输出极。正输出极和负输出极即为电池单体10用于与其他部件连接并输出电池单体10的电能的部分。以两个电池单体10通过汇流部件电连接,以实现两个电池单体10串联为例,一个电池单体10的正输出极和另一个电池单体10的负极输出极均可与汇流部件焊接。
可以理解的,电池单体10的正输出极与负输出极之间处于绝缘状态,故筒体113与输出部114两者绝缘连接。在一些实施例中,筒体113与输出部114可以通过绝缘单元17绝缘隔离。绝缘单元17可以是橡胶、塑料等材质。
在一些实施例中,电极组件12可以包括主体121和极耳,极耳从主体121延伸。主体121可以包括正极极片、负极极片和隔离膜。主体121可以是由正极极片、隔离膜和负极极片通过卷绕形成的卷绕式结构。主体121也可以是由正极极片、隔离膜和负极极片通过层叠布置形成的层叠式结构。
正极极片包括正极集流体和涂覆于正极集流体相对的两侧的正极活性物质层。负极极片包括负极集流体和涂覆于负极集流体相对的两侧的负极活性物质层。主体121为电极组件12与极片涂覆有活性物质层的区域对应的部分,极耳为极片未涂覆活性物质层的区域。
极耳可以分为第一极耳122和第二极耳123,第一极耳122可以与集流构件14连接,实现电极组件12与壳体11的筒体113的电连接;第二极耳123可以与输出部114连接,实现电极组件12与输出部114的电连接。
示例性的,第一极耳122可以为筒状结构,第一极耳122的一端连接于主体121,第一极耳122的另一端焊接于集流构件14。这种结构可保证第一极耳122与集流构件14连接的牢固性,简化第一极耳122与集流构件14的连接工艺。
示例性的,第二极耳123也可以为筒状结构,第二极耳123的一端连接于主体121,第二 极耳123的另一端焊接于输出部114。这种结构可保证第二极耳123与输出部114连接的牢固性,简化第二极耳123与输出部114的连接工艺。
第一极耳122和第二极耳123两者中的一者为正极极耳,另一者为负极极耳。正极极耳为正极极片上未涂覆有正极活性物质层的区域。负极极耳为负极极片上未涂覆有负极活性物质层的区域。
需要说明的是,若第一极耳122为正极极耳,第二极耳123为负极极耳,筒体113则为正输出极,输出部114则为负输出极;若第一极耳122为负极极耳,第二极片为正极极耳,筒体113则为负输出极,输出部114则为正输出极。
在本申请实施例中,集流构件14可以是金属导体,比如,铜、铁、铝、钢、铝合金等。集流构件14可以通过多种方式与壳体11连接。比如,集流构件14与壳体11焊接,再如,集流构件14与壳体11通过导电胶粘接。
在一些实施例中,集流构件14焊接于壳体11,且集流构件14的熔点低于壳体11的熔点。
在从壳体11的内部将集流构件14焊接于壳体11内时,由于集流构件14的熔点低于壳体11的熔点,壳体11不易出现被击穿的现象,有效降低壳体11漏液的风险。
以壳体11为钢材质,集流构件14为铝材质为例,壳体11的熔点为1500℃,集流构件14的熔点为660℃,在焊接时,焊接温度可选用在660℃-1500℃之间的温度,比如,焊接温度为800℃,该温度未达到壳体11的熔点,焊接过程中壳体11不易出现被击穿的现象。
具体地,集流构件14的熔点低于壳体11的筒体113的熔点。
在一些实施例中,请参照图5,图5为图4所示的电池单体10的A处局部放大图,集流构件14连接于壳体11的内侧面115,这种结构使得集流构件14与壳体11具有较大的接触面积,可有效提高集流构件14连接于壳体11的牢固性,提高过流能力。
壳体11的内侧面115即为母线沿壳体11的开口111的周向运动形成的面,这里所指的母线为沿端盖13的厚度方向Z布置的线。以壳体11为圆柱形结构为例,壳体11的内侧面115即为壳体11的内圆周面。
示例性的,集流构件14焊接于壳体11的内侧面115。
可选地,端盖13的外侧面131与壳体11的内侧面115相对设置。集流构件14至少一部分位于端盖13的外侧面131与壳体11的内侧面115之间,端盖13被配置为将集流构件14的一部分抵压于壳体11的内侧面115,以使集流构件14与壳体11紧密接触,提高了集流构件14连接于壳体11的牢固性。
需要说明的是,端盖13将集流构件14的一部分抵压于壳体11的内侧面115,可以是端盖13直接将集流构件14的一部分抵压于壳体11的内侧面115,即端盖13与集流构件14直接相抵;也可以是端盖13间接将集流构件14的一部分抵压于壳体11的内侧面115,即端盖13与集流构件14间接相抵,比如,在端盖13与壳体11通过密封件15密封连接的情况下,端盖13通过密封件15与集流构件14间接相抵。
在一些实施例中,集流构件14包括第一连接部141和第二连接部142,在端盖13的厚度方向Z上,第一连接部141至少一部分位于端盖13与电极组件12之间,第一连接部141被配置为与电极组件12连接,以实现集流构件14与电极组件12电连接。第二连接部142连接于第一连接部141,并从第一连接部141沿端盖13的厚度方向Z背离电极组件12延伸,第二连接部142被配置为与壳体11连接。这种集流构件14结构简单,易于成型制造,既可方便地与电极组件12连接,又可方便地与壳体11连接。
其中,第一连接部141用于与电极组件12的第一极耳122连接,比如,第一连接部141与第一极耳122焊接。第二连接部142可以连接于壳体11的内侧面115,比如,第二连接部142焊接于壳体11的内侧面115。
示例性的,如图5所示,端盖13通过密封件15将集流构件14的第二连接部142抵压于壳体11的内侧面115,以提高集流构件14连接于壳体11的牢固性。
可选地,第二连接部142为连接于第一连接部141的外边缘的环形结构,这种结构使得集流构件14可通过冲压的方式形成,成型简单方便。此外,环形的第二连接部142与壳体11具有较大的接触面积,有利于提高过流能力。
在一些实施例中,壳体11的内表面包括台阶面116,集流构件14沿面向电极组件12的方向抵靠于台阶面116,台阶面116对集流构件14起到限制作用,以限制集流构件14沿面向电极组件12的方向移动。
在组装电池单体10的过程中,将集流构件14抵靠于台阶面116后,则可将集流构件14连接于壳体11,可方便地实现集流构件14的安装。
其中,台阶面116与壳体11的内侧面115相连,可以是集流构件14的第一连接部141沿面向电极组件12的方向抵靠于台阶面116。
在本实施例中,如图5所示,集流构件14可以连接于壳体11的内侧面115。在其他实施例中,集流构件14也可以不与壳体11的内侧面115连接,而是与台阶面116相抵并连接在一起,比如,集流构件14的第一连接部141焊接于台阶面116,集流构件的第二连接部142与壳体11的内侧面115接触,但未连接在一起。
在一些实施例中,请继续参照图5,壳体11在开口111的一端设有限位部117,限位部117被配置为限制端盖13沿背离电极组件12的方向脱离壳体11,也就是说,限位部117对端盖13起到限制作用,限制端盖13沿背离电极组件12的方向脱离壳体11。
可理解的,限位部117位于壳体11的筒体113远离输出部114的一端。
限位部117可以是壳体11局部向内翻折的翻边结构,就是说,通过翻折壳体11的方式则可在壳体11的开口111位置形成限位部117,成型简单。
在组装电池单体10的过程中,可先将集流构件14容纳于壳体11内并连接于电极组件12和壳体11,再将端盖13盖合于壳体11的开口111,最后再通过翻折壳体11的方式形成限位部117,以限制端盖13。
为使限位部117对端盖13能够起到更好的限位能力,可以将限位部117设置为环形结构。当然,呈环形的限位部117更容易与端盖13实现密封。
在一些实施例中,在端盖13的厚度方向Z上,端盖13至少一部分位于限位部117与集流构件14之间,限位部117与集流构件14共同限制端盖13在厚度方向Z的移动,从而使得端盖13不易在壳体11内沿壳体11的厚度方向Z窜动。
示例性的,在图5中,在端盖13的厚度方向Z上,端盖13的一部分位于限位部117与集流构件14的第一连接部141之间。
限位部117与集流构件14均对端盖13起到限制作用。集流构件14可以与端盖13直接相抵,也可以间接相抵,限位部117可以与端盖13直接相抵,也可以间接相抵,以限制端盖13在厚度方向Z的移动。示例性的,在图5中,端盖13通过密封件15与限位部117相抵。
在另一些实施例中,在端盖13的厚度方向Z上,端盖13至少一部分位于限位部117与台阶面116之间,限位部117与台阶面116共同限制端盖13在厚度方向Z的移动,从而使得端盖13不易在壳体11内沿壳体11的厚度方向Z窜动。
限位部117与台阶面116均对端盖13起到限制作用。限位部117可以与端盖13直接相抵,也可以间接相抵,台阶面116可以与端盖13直接相抵,也可以间接相抵,以限制端盖13在厚度方向Z的移动。
在一些实施例中,请继续参照图5,在端盖13与壳体11通过密封件15密封连接的情况下,密封件15可以沿壳体11的开口111的周向包覆于端盖13。这种结构一方面,提高了密封件 15对端盖13与壳体11的密封性能,另一方面,提高了密封件15与壳体11的整体性。在组装电池单体10的过程中,可先将密封件15包覆于端盖13,再将端盖13和密封件15作为整体再安装于壳体11。
在一些实施例中,在壳体11的开口111的一端设置有限位部117的情况下,在端盖13的厚度方向Z上,密封件15至少一部分位于端盖13与限位部117之间,以实现端盖13与壳体11的密封连接,保证端盖13与壳体11之间具有良好的密封性。
在一些实施例中,密封件15可以包括围体151和第三连接部152,第三连接部152连接于围体151。端盖13至少一部分位于围体151内,在端盖13其厚度方向Z上,第三连接部152位于端盖13与限位部117之间,以实现端盖13与壳体11的密封连接。
由于端盖13至少一部分位于围体151内,实现密封件15沿壳体11的开口111的周向包覆于端盖13。由于第三连接部152位于端盖13与限位部117之间,实现端盖13与壳体11的密封连接,即使集流构件14与端盖13之间未进行密封,端盖13与壳体11之间也不会出现漏液的情况。密封件15整体结构简单,在实现端盖13与壳体11良好的密封的同时,使得密封件15与端盖13具有很好的整体性。
在密封件15具有绝缘性能的情况下,密封件15的围体151和第三连接部152在端盖13与壳体11之间均可起到绝缘作用。
示例性的,端盖13通过密封件15的围体151将集流构件14的第二连接部142抵压于壳体11的内侧面115。第三连接部152和限位部117均为环形结构,第三连接部152的内径小于限位部117的内径。
在一些实施例中,请参照图6,图6为本申请又一些实施例提供的电池单体10的局部放大图,密封件15还可以包括第四连接部153,围体151、第三连接部152和第四连接部153依次连接。端盖13包括本体部132和延伸部133,延伸部133从本体部132沿背离电极组件12的方向延伸,围体151位于延伸部133的外侧,第四连接部153位于延伸部133的内侧,在端盖13的厚度方向Z上,第三连接部152位于延伸部133与限位部117之间。限位部117设有弯折部118,弯折部118相对于限位部117向靠近电极组件12的方向弯折,第四连接部153位于延伸部133与弯折部118之间。限位部117将第三连接部152压紧于延伸部133,弯折部118将第四连接部153压紧于延伸部133。这种结构可进一步提高端盖13与壳体11之间的密封性。
示例性的,第三连接部152、限位部117和第四连接部153均为环形结构。
在本实施例中,壳体11可以设置台阶面116,也可不设置台阶面116。示例性的,在图6中,壳体11未设置台阶面116。
需要说明的是,在本申请实施例中,密封件15并不仅仅局限于上述结构,密封件15也可以是其他结构。比如,密封件15仅包括围体151,围体151为两端开放结构,围体151包覆于端盖13的外周,围体151与端盖13的外侧面131以及壳体11的内侧面115相抵,或围体151与端盖13的外侧面131以及集流构件14的第二连接部142相抵,从而实现壳体11与端盖13的密封。再如,密封件15仅包括第三连接部152,在端盖13的厚度方向Z上,第三连接部152位于限位部117与端盖13之间,从而实现壳体11与端盖13的密封。
需要说明的是,在本申请实施例中,在壳体11的台阶面116可以有多种形成形式。比如,如图5所示,壳体11靠近开口111的一部分侧向凸出,使得壳体11凸出的部分的内径大于壳体11未凸出的部分的内径,进而形成台阶面116;再如,请参照图7,图7为本申请再一些实施例提供的电池单体10的局部放大图,壳体11局部内凹形成第二限位凸起119,壳体11在第二限位凸起119的位置形成缩颈结构,第二限位凸起119用于限制电极组件12的主体121向靠近端盖13的方向移动,第二限位凸起119背离电极组件12的一侧形成台阶面116。示例性的,第二限位凸起119为环形结构。
在一些实施例中,请参照图8,图8为图4所示的电池单体10的局部视图,电池单体10还可以包括绝缘件18,在端盖13的厚度方向Z上,绝缘件18位于第一极耳122与端盖13之间, 绝缘件18沿端盖13的厚度方向Z的投影覆盖第一极耳122。绝缘件18起到隔离端盖13和第一极耳122的作用,降低端盖13带电的风险。
绝缘件18沿端盖13的厚度方向Z的投影覆盖第一极耳122,即绝缘件18沿端盖13的厚度方向Z的投影覆盖第一极耳122远离主体121的端面(第一极耳122与集流构件14相连的端面)。以第一极耳122为筒状结构为例,绝缘件18沿端盖13的厚度方向Z的投影覆盖第一极耳122远离主体121的环形端面。
绝缘件18可以是橡胶、塑料等材质。
在一些实施例中,在端盖13的厚度方向Z上,绝缘件18至少部分位于集流构件14与端盖13之间,以将集流构件14与端盖13绝缘隔离。
示例性的,在端盖13的厚度方向Z上,绝缘件18部分位于集流构件14的第一连接部141与端盖13之间,以将集流构件14与端盖13绝缘隔离。绝缘件18上设有第一通孔181,第一连接部141上设有第二通孔143,第一通孔181和第二通孔143均通向电极组件12的主体121的中心孔124,第一通孔181和第二通孔143均与泄压机构16相对设置,以便于在电池单体10的内部压力或温度达到阈值时通过泄压机构16泄放电池单体10内部的压力。
如图8所示,绝缘件18与密封件15两者可以彼此独立,即绝缘件18与密封件15为两个单独的部件。在其他实施例中,请参照图9,图9为本申请其他实施例提供电池单体10的局部视图,绝缘件18与密封件15两者也可以是一体成型结构,即绝缘件18与密封件15一体成型制造。示例性的,在端盖13的厚度方向Z上,绝缘件18和第三连接部152分别位于围体151的两端,绝缘件18和第三连接部152共同限制端盖13脱离密封件15。
本申请实施例提供一种电池单体10的制造方法,请参照图10,图10为本申请一些实施例提供的电池单体10的制造方法的流程图,制造方法包括:
S100:提供壳体11,壳体11具有开口111;
S200:提供电极组件12;
S300:提供端盖13;
S400:提供集流构件14;
S500:将集流构件14连接于电极组件12;
S600:将电极组件12和集流构件14容纳于壳体11内;
S700:将集流构件14连接于壳体11,以使电极组件12与壳体11电连接;
S800:将端盖13盖合于壳体11的开口111,并使端盖13与壳体11密封连接,使得集流构件14位于电极组件12面向端盖13的一侧。
在上述方法中,并不限制步骤S100、步骤S200、步骤S300和步骤S400的先后顺序,比如,可以先执行步骤S400,再执行步骤S300,再执行步骤S200,再执行步骤S100。
在一些实施例中,步骤S700可以包括:从壳体11的内部将集流构件14焊接于壳体11;其中,集流构件14的熔点低于壳体11的熔点。
由于集流构件14的熔点低于壳体11的熔点,从壳体11的内部将集流构件14焊接于壳体11,使得壳体11不易出现被击穿的现象,有效地降低壳体11漏液的风险。
在一些实施例中,请参照图11,图11为本申请又一些实施例提供的电池单体10的制造方法的流程图,在将端盖13盖合于开口111后,制造方法还可以包括:
S900:对壳体11进行翻边处理,使壳体11在设置开口111的一端形成限位部117,使得限位部117限制端盖13沿背离电极组件12的方向脱离壳体11。
通过翻边的方式形成限位部117,以限制端盖13沿背离电极组件12的方向脱离壳体11, 实现方式简单,可有效降低制造成本。
需要说明的是,通过上述各实施例提供的制造方法制造的电池单体10的相关结构,可参见前述各实施例提供的电池单体10,在此不再赘述。
此外,本申请实施例还提供一种电池单体10的制造设备2000,请参照图12,图12为本申请一些实施例提供的电池单体10的制造设备2000的示意性框图,制造设备2000包括第一提供装置1100、第二提供装置1200、第三提供装置1300、第四提供装置1400和组装装置1500。
第一提供装置1100用于提供壳体11,壳体11具有开口111。第二提供装置1200,用于提供电极组件12。第三提供装置1300,用于提供端盖13。第四提供装置1400,用于提供集流构件14。组装装置1500,用于将集流构件14连接于电极组件12;将电极组件12和集流构件14容纳于壳体11内;将集流构件14连接于壳体11,以使电极组件12与壳体11电连接;将端盖13盖合于开口111,并使端盖13与壳体11密封连接,使得集流构件14位于电极组件12面向端盖13的一侧。
需要说明的是,通过上述实施例提供的制造设备2000制造的电池单体10的相关结构,可参见前述各实施例提供的电池单体10,在此不再赘述。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
以上实施例仅用以说明本申请的技术方案,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (27)

  1. 一种电池单体,包括:
    壳体,具有开口;
    电极组件,容纳于所述壳体内;
    端盖,盖合于所述开口,并与所述壳体密封连接;以及
    集流构件,容纳于所述壳体内,并位于所述电极组件面向所述端盖的一侧,所述集流构件被配置为连接所述壳体和电极组件,以使所述电极组件与所述壳体电连接。
  2. 根据权利要求1所述的电池单体,其中,所述集流构件连接于所述壳体的内侧面。
  3. 根据权利要求2所述的电池单体,其中,所述端盖的外侧面与所述壳体的内侧面相对设置;
    所述集流构件至少一部分位于所述端盖的外侧面与所述壳体的内侧面之间,所述端盖被配置为将所述集流构件的一部分抵压于所述壳体的内侧面。
  4. 根据权利要求1-3任一项所述的电池单体,其中,所述集流构件包括第一连接部和第二连接部;
    在所述端盖的厚度方向上,所述第一连接部至少一部分位于所述端盖与所述电极组件之间,所述第一连接部被配置为与所述电极组件连接;
    所述第二连接部连接于所述第一连接部,并从所述第一连接部沿所述端盖的厚度方向背离所述电极组件延伸,所述第二连接部被配置为与所述壳体连接。
  5. 根据权利要求4所述的电池单体,其中,所述第二连接部为连接于所述第一连接部的外边缘的环形结构。
  6. 根据权利要求1-5任一项所述的电池单体,其中,所述壳体在所述开口的一端设置有限位部;
    所述限位部被配置为限制所述端盖沿背离所述电极组件的方向脱离所述壳体。
  7. 根据权利要求6所述的电池单体,其中,在所述端盖的厚度方向上,所述端盖至少一部分位于所述限位部与所述集流构件之间,所述限位部与所述集流构件共同限制所述端盖在所述端盖的厚度方向的移动。
  8. 根据权利要求6所述的电池单体,其中,所述壳体的内表面包括台阶面;
    在所述端盖的厚度方向上,所述端盖至少一部分位于所述限位部与所述台阶面之间,所述限位部与所述台阶面共同限制所述端盖在所述端盖的厚度方向的移动。
  9. 根据权利要求6-8任一项所述的电池单体,其中,所述限位部为环形结构。
  10. 根据权利要求6-9任一项所述的电池单体,其中,所述限位部为所述壳体局部向内翻折的翻边结构。
  11. 根据权利要求1-10任一项所述的电池单体,其中,所述壳体的内表面包括台阶面;
    所述集流构件沿面向所述电极组件的方向抵靠于所述台阶面。
  12. 根据权利要求1-11任一项所述的电池单体,其中,所述电池单体还包括密封件;
    所述端盖与所述壳体通过所述密封件密封连接。
  13. 根据权利要求12所述的电池单体,其中,所述密封件被配置为将所述壳体与所述端盖绝缘隔离。
  14. 根据权利要求12或13所述的电池单体,其中,所述密封件被配置为沿所述开口的周向包覆于所述端盖。
  15. 根据权利要求12-14任一项所述的电池单体,其中,所述壳体在所述开口的一端设置有限位部,在所述端盖的厚度方向上,所述密封件至少一部分位于所述端盖与所述限位部之间,以实现所述端盖与所述壳体的密封连接。
  16. 根据权利要求15所述的电池单体,其中,所述密封件包括围体和第三连接部,所述第三连接部连接于所述围体;
    所述端盖至少一部分位于所述围体内,在所述端盖其厚度方向上,所述第三连接部位于所述端盖与限位部之间,以实现所述端盖与壳体的密封连接。
  17. 根据权利要求1-16任一项所述的电池单体,其中,所述电极组件包括第一极耳,所述第一极耳被配置为与所述集流构件连接;
    所述电池单体还包括绝缘件,在所述端盖的厚度方向上,所述绝缘件位于所述第一极耳与所述端盖之间,所述绝缘件沿所述端盖的厚度方向的投影覆盖所述第一极耳。
  18. 根据权利要求1-17任一项所述的电池单体,其中,所述电极组件包括主体和第一极耳,所述第一极耳为筒状结构,所述第一极耳的一端连接于所述主体,所述第一极耳的另一端焊接于所述集流构件。
  19. 根据权利要求1-18任一项所述的电池单体,其中,所述集流构件焊接于所述壳体。
  20. 根据权利要求19所述的电池单体,其中,所述集流构件的熔点低于所述壳体的熔点。
  21. 根据权利要求1-20任一项所述的电池单体,其中,所述电池单体还包括泄压机构;
    所述泄压机构设置于所述端盖,所述泄压机构被配置为在所述电池单体的内部压力或温度达到阈值时致动以泄放所述内部的压力。
  22. 一种电池,包括多个根据权利要求1-21任一项所述的电池单体。
  23. 一种用电设备,包括根据权利要求1-21任一项所述的电池单体。
  24. 一种电池单体的制造方法,包括:
    提供壳体,所述壳体具有开口;
    提供电极组件;
    提供端盖;
    提供集流构件;
    将集流构件连接于所述电极组件;
    将所述电极组件和所述集流构件容纳于所述壳体内;
    将所述集流构件连接于所述壳体,以使所述电极组件与所述壳体电连接;
    将所述端盖盖合于所述开口,并使所述端盖与所述壳体密封连接,使得所述集流构件位于所述电极组件面向所述端盖的一侧。
  25. 根据权利要求24所述的制造方法,其中,所述将所述集流构件连接于所述壳体包括:
    从所述壳体的内部将所述集流构件焊接于所述壳体;
    其中,所述集流构件的熔点低于所述壳体的熔点。
  26. 根据权利要求24或25所述的制造方法,其中,所述制造方法还包括:
    在将所述端盖盖合于所述开口后,对所述壳体进行翻边处理,使所述壳体在设置所述开口的一端形成限位部,使得所述限位部限制所述端盖沿背离所述电极组件的方向脱离所述壳体。
  27. 一种电池单体的制造设备,包括:
    第一提供装置,用于提供壳体,所述壳体具有开口;
    第二提供装置,用于提供电极组件;
    第三提供装置,用于提供端盖;
    第四提供装置,用于提供集流构件;
    组装装置,用于将集流构件连接于所述电极组件;将所述电极组件和所述集流构件容纳于所述壳体内;将所述集流构件连接于所述壳体,以使所述电极组件与所述壳体电连接;将所述端盖盖合于所述开口,并使所述端盖与所述壳体密封连接,使得所述集流构件位于所述电极组件面向所述端盖的一侧。
PCT/CN2021/104779 2021-07-06 2021-07-06 电池单体、电池、用电设备及电池单体的制造方法和设备 Ceased WO2023279260A1 (zh)

Priority Applications (18)

Application Number Priority Date Filing Date Title
JP2023547133A JP7610018B2 (ja) 2021-07-06 2021-07-06 電池セル、電池、電力消費機器及び電池セルの製造方法と機器
KR1020257042371A KR20260003869A (ko) 2021-07-06 2021-07-06 배터리 셀, 배터리, 전기 사용 장치 및 배터리 셀의 제조 방법과 설비
CN202190000391.0U CN219040512U (zh) 2021-07-06 2021-07-06 电池单体、电池、用电设备及电池单体的制造设备
PCT/CN2021/104779 WO2023279260A1 (zh) 2021-07-06 2021-07-06 电池单体、电池、用电设备及电池单体的制造方法和设备
EP21806119.0A EP4138166A4 (en) 2021-07-06 2021-07-06 BATTERY CELL, BATTERY, POWER CONSUMPTION DEVICE AND BATTERY PRODUCTION METHOD AND DEVICE
EP24190325.1A EP4429012A3 (en) 2021-07-06 2021-07-06 Battery cell, battery, electrical device, and manufacturing method and device for battery cell
KR1020237026248A KR20230127330A (ko) 2021-07-06 2021-07-06 배터리 셀, 배터리, 전기 사용 장치 및 배터리 셀의제조 방법과 설비
EP21949060.4A EP4300702A4 (en) 2021-07-06 2021-10-20 Battery cell, battery, electric device, and method and device for manufacturing battery cell
DE202021004620.8U DE202021004620U1 (de) 2021-07-06 2021-10-20 Batteriezelle, Batterie, elektrisches Gerät und Herstellungsanlage der Batteriezelle
CN202511588388.6A CN121394704A (zh) 2021-07-06 2021-10-20 电池单体、电池、用电设备及电池单体的制造方法和设备
PCT/CN2021/125099 WO2023279574A1 (zh) 2021-07-06 2021-10-20 电池单体、电池、用电设备及电池单体的制造方法和设备
CN202180072351.1A CN116888782B (zh) 2021-07-06 2021-10-20 电池单体、电池、用电设备及电池单体的制造方法和设备
KR1020237019717A KR102869410B1 (ko) 2021-07-06 2021-10-20 배터리 셀, 배터리, 전기 기기 및 배터리 셀의 제조 방법과 기기
CN202122532971.9U CN216120648U (zh) 2021-07-06 2021-10-20 电池单体、电池及用电设备
JP2023536182A JP7617278B2 (ja) 2021-07-06 2021-10-20 電池セル、電池、電気設備ならびに電池セルの製造方法および設備
US17/554,466 US20230012207A1 (en) 2021-07-06 2021-12-17 Battery cell, battery, power consumption device, and battery cell manufacturing method and device
US18/398,175 US20240128604A1 (en) 2021-07-06 2023-12-28 Battery cell, battery, electrical device, and manufacturing method and device for battery cell
JP2024231229A JP7830613B2 (ja) 2021-07-06 2024-12-26 電池セル、電池、電気設備ならびに電池セルの製造方法および設備

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/104779 WO2023279260A1 (zh) 2021-07-06 2021-07-06 电池单体、电池、用电设备及电池单体的制造方法和设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/554,466 Continuation US20230012207A1 (en) 2021-07-06 2021-12-17 Battery cell, battery, power consumption device, and battery cell manufacturing method and device

Publications (1)

Publication Number Publication Date
WO2023279260A1 true WO2023279260A1 (zh) 2023-01-12

Family

ID=80694335

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CN2021/104779 Ceased WO2023279260A1 (zh) 2021-07-06 2021-07-06 电池单体、电池、用电设备及电池单体的制造方法和设备
PCT/CN2021/125099 Ceased WO2023279574A1 (zh) 2021-07-06 2021-10-20 电池单体、电池、用电设备及电池单体的制造方法和设备

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/125099 Ceased WO2023279574A1 (zh) 2021-07-06 2021-10-20 电池单体、电池、用电设备及电池单体的制造方法和设备

Country Status (7)

Country Link
US (2) US20230012207A1 (zh)
EP (3) EP4429012A3 (zh)
JP (3) JP7610018B2 (zh)
KR (3) KR20260003869A (zh)
CN (4) CN219040512U (zh)
DE (1) DE202021004620U1 (zh)
WO (2) WO2023279260A1 (zh)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN216903082U (zh) * 2021-03-08 2022-07-05 株式会社Lg新能源 圆筒形二次电池、电池组及移动单元
EP4429012A3 (en) * 2021-07-06 2024-11-27 Jiangsu Contemporary Amperex Technology Limited Battery cell, battery, electrical device, and manufacturing method and device for battery cell
US20230113374A1 (en) * 2021-10-12 2023-04-13 Lg Energy Solution, Ltd. Battery pack and vehicle including the same
CN114725628B (zh) * 2022-04-21 2024-05-10 远景动力技术(江苏)有限公司 一种电池组件和电池制造方法
EP4468510A4 (en) * 2022-07-19 2025-11-05 Lg Energy Solution Ltd ASSEMBLY STRUCTURE OF ELECTRODE, AND CYLINDRICAL BATTERY, BATTERY BLOCK AND VEHICLE COMPRISING IT
CA3261207A1 (en) * 2022-07-19 2025-06-13 Lg Energy Solution, Ltd. BATTERY, BATTERY BLOCK, AND VEHICLE INCLUDING THEM
WO2024045072A1 (zh) * 2022-08-31 2024-03-07 宁德时代新能源科技股份有限公司 电池单体、电池、用电装置及电池单体的制造方法
WO2024092634A1 (zh) * 2022-11-03 2024-05-10 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
SE546927C2 (en) * 2022-12-23 2025-03-11 Northvolt Ab Secondary cell
SE547682C2 (en) * 2022-12-23 2025-11-11 Northvolt Ab Secondary cell
WO2024133482A1 (en) * 2022-12-23 2024-06-27 Northvolt Ab Cylindrical battery cell comprising a lid closure
CN119404370A (zh) * 2023-02-27 2025-02-07 宁德时代新能源科技股份有限公司 电池单体、电池及用电装置
CN220627967U (zh) * 2023-07-25 2024-03-19 株式会社Aesc日本 二次电池、电池组及电子设备
CN221080159U (zh) * 2023-11-07 2024-06-04 株式会社Aesc日本 二次电池、电池组及电子设备
CN118198614A (zh) * 2023-11-13 2024-06-14 宁德时代新能源科技股份有限公司 电池单体及其制造方法、电池和用电装置
WO2025102386A1 (zh) * 2023-11-17 2025-05-22 宁德时代新能源科技股份有限公司 电池单体、电池和用电设备
EP4685940A1 (en) * 2023-11-17 2026-01-28 Contemporary Amperex Technology Co., Limited Battery cell, battery, and electrical device
CN120021053A (zh) * 2023-11-19 2025-05-20 远景睿泰动力技术(上海)有限公司 二次电池、电子设备及二次电池的制作方法
WO2025135447A1 (ko) * 2023-12-22 2025-06-26 주식회사 엘지에너지솔루션 배터리 셀, 이를 포함하는 배터리 팩, 자동차 및 이의 제조방법
KR20260013596A (ko) * 2024-07-22 2026-01-29 에스케이온 주식회사 배터리셀
WO2026020421A1 (zh) * 2024-07-25 2026-01-29 宁德时代新能源科技股份有限公司 电池单体、电池及用电装置
WO2026023970A1 (ko) * 2024-07-26 2026-01-29 주식회사 엘지에너지솔루션 배터리 셀, 이를 포함하는 배터리 팩 및 자동차
CN223552658U (zh) * 2024-08-21 2025-11-14 株式会社Aesc日本 二次电池、电池组及电子装置
WO2026051006A1 (zh) * 2024-09-06 2026-03-12 宁德时代新能源科技股份有限公司 电池单体、电池装置和用电装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1694281A (zh) * 2004-04-27 2005-11-09 三星Sdi株式会社 二次电池
CN101834304A (zh) * 2009-03-11 2010-09-15 Sb锂摩托有限公司 可再充电电池
US20140349149A1 (en) * 2013-05-22 2014-11-27 Samsung Sdi Co., Ltd. Rechargeable battery
CN209786120U (zh) * 2019-05-31 2019-12-13 宁德时代新能源科技股份有限公司 二次电池和电池模组
CN112072058A (zh) * 2020-11-11 2020-12-11 江苏时代新能源科技有限公司 电池单体、电池、用电设备及电池制造方法
CN112510326A (zh) * 2020-12-18 2021-03-16 湖北亿纬动力有限公司 一种单体电池
CN112701422A (zh) * 2021-03-24 2021-04-23 江苏时代新能源科技有限公司 电池单体、电池及用电设备

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3386698B2 (ja) * 1997-08-25 2003-03-17 株式会社デンソー 電 池
JP3547959B2 (ja) * 1997-11-21 2004-07-28 三洋電機株式会社 リチウム電池及びその製造方法
JP3418551B2 (ja) * 1998-06-12 2003-06-23 日本碍子株式会社 リチウム二次電池
JP2000106165A (ja) 1998-09-28 2000-04-11 Japan Storage Battery Co Ltd 円筒形電池
US6525511B2 (en) * 2000-08-11 2003-02-25 Milwaukee Electric Tool Corporation Adapter for a power tool battery
JP5224573B2 (ja) * 2003-02-11 2013-07-03 エバレデイ バツテリ カンパニー インコーポレーテツド 小体積のカバーアセンブリを有する電気化学セル
JP4501361B2 (ja) 2003-06-05 2010-07-14 パナソニック株式会社 二次電池
JP4567374B2 (ja) * 2003-08-28 2010-10-20 パナソニック株式会社 電池およびその製造方法
JP4654575B2 (ja) * 2003-10-27 2011-03-23 パナソニック株式会社 円筒形電池とそれを用いた電池間接続構造
JP4563264B2 (ja) * 2004-09-22 2010-10-13 日本碍子株式会社 リチウム二次電池
CN100590909C (zh) * 2006-01-20 2010-02-17 深圳市比克电池有限公司 一种卷绕型电池
JP2008066040A (ja) * 2006-09-05 2008-03-21 Sony Corp 電池およびその製造方法
JP2012124007A (ja) 2010-12-08 2012-06-28 Panasonic Corp 二次電池およびその製造方法
US9251986B2 (en) * 2011-07-06 2016-02-02 In Kim Rechargeable battery
CN102916159B (zh) * 2012-11-06 2014-12-24 徐敖奎 一种高功率锂电池
US9490079B2 (en) * 2014-03-28 2016-11-08 Cooper Technologies Company Electrochemical energy storage device with flexible metal contact current collector and methods of manufacture
KR102567831B1 (ko) * 2015-10-02 2023-08-17 삼성에스디아이 주식회사 이차 전지
KR102620809B1 (ko) * 2016-06-09 2024-01-02 삼성에스디아이 주식회사 이차 전지
JP2019083151A (ja) * 2017-10-31 2019-05-30 株式会社豊田自動織機 蓄電装置の製造装置及び蓄電装置の製造方法
CN209133626U (zh) 2018-11-06 2019-07-19 苏州安靠电源有限公司 高倍率电池
EP3667761B1 (de) * 2018-12-13 2021-02-17 VARTA Microbattery GmbH Zylindrische zelle mit kontaktfahnen
CN110379943A (zh) * 2019-06-20 2019-10-25 金能电池(东莞)有限公司 一种带胶垫的柱状电池
CN112310569B (zh) * 2019-10-29 2022-03-11 宁德时代新能源科技股份有限公司 一种电池单体、电池模块、电池组、装置及加工方法
CN112290167B (zh) * 2020-12-30 2021-05-04 江苏时代新能源科技有限公司 电池单体及其制造方法、电池及用电装置
DE202022002770U1 (de) 2021-01-19 2023-05-16 Lg Energy Solution, Ltd. Batterie, Stromabnehmer für eine Batterie, Batteriepack und Fahrzeug mit einem Batteriepack
CN112909445A (zh) 2021-01-26 2021-06-04 苏州宇量电池有限公司 一种单头双极的多极耳圆柱锂离子电池
KR102447738B1 (ko) * 2021-02-19 2022-09-28 주식회사 엘지에너지솔루션 배터리, 그리고 이를 포함하는 배터리 팩 및 자동차
US20240128608A1 (en) 2021-02-19 2024-04-18 Lg Energy Solution, Ltd. Battery, and battery pack and vehicle comprising the same
CN217306617U (zh) * 2021-02-19 2022-08-26 株式会社Lg新能源 电极端子的铆接结构及包括其的二次电池、电池组及汽车
US12199247B2 (en) * 2021-02-19 2025-01-14 Lg Energy Solution, Ltd. Battery and current collector applied thereto, and battery pack and vehicle including the same
SE544360C2 (en) 2021-04-22 2022-04-19 Northvolt Ab Cylindrical secondary cell
EP4429012A3 (en) * 2021-07-06 2024-11-27 Jiangsu Contemporary Amperex Technology Limited Battery cell, battery, electrical device, and manufacturing method and device for battery cell
CN114122486B (zh) * 2021-07-06 2024-06-07 江苏时代新能源科技有限公司 电池单体、电池、用电设备及电池单体的制造方法和设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1694281A (zh) * 2004-04-27 2005-11-09 三星Sdi株式会社 二次电池
CN101834304A (zh) * 2009-03-11 2010-09-15 Sb锂摩托有限公司 可再充电电池
US20140349149A1 (en) * 2013-05-22 2014-11-27 Samsung Sdi Co., Ltd. Rechargeable battery
CN209786120U (zh) * 2019-05-31 2019-12-13 宁德时代新能源科技股份有限公司 二次电池和电池模组
CN112072058A (zh) * 2020-11-11 2020-12-11 江苏时代新能源科技有限公司 电池单体、电池、用电设备及电池制造方法
CN112510326A (zh) * 2020-12-18 2021-03-16 湖北亿纬动力有限公司 一种单体电池
CN112701422A (zh) * 2021-03-24 2021-04-23 江苏时代新能源科技有限公司 电池单体、电池及用电设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4138166A4 *

Also Published As

Publication number Publication date
EP4300702A1 (en) 2024-01-03
WO2023279574A1 (zh) 2023-01-12
JP2024500394A (ja) 2024-01-09
JP7610018B2 (ja) 2025-01-07
JP2024505291A (ja) 2024-02-05
EP4429012A3 (en) 2024-11-27
KR20230127330A (ko) 2023-08-31
CN219040512U (zh) 2023-05-16
KR20260003869A (ko) 2026-01-07
EP4429012A2 (en) 2024-09-11
EP4138166A1 (en) 2023-02-22
US20240128604A1 (en) 2024-04-18
KR102869410B1 (ko) 2025-10-14
CN116888782B (zh) 2025-12-05
DE202021004620U1 (de) 2026-02-24
CN216120648U (zh) 2022-03-22
KR20230107639A (ko) 2023-07-17
JP7617278B2 (ja) 2025-01-17
EP4138166A4 (en) 2023-11-01
JP2025060917A (ja) 2025-04-10
CN121394704A (zh) 2026-01-23
CN116888782A (zh) 2023-10-13
EP4300702A4 (en) 2025-04-30
US20230012207A1 (en) 2023-01-12
JP7830613B2 (ja) 2026-03-16

Similar Documents

Publication Publication Date Title
CN219040512U (zh) 电池单体、电池、用电设备及电池单体的制造设备
CN114122486B (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
CN114696016B (zh) 端盖组件、电池、用电设备、电池单体及其制造方法
CN216213727U (zh) 电池单体、电池以及用电装置
CN116325329B (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
CN216085200U (zh) 电池单体、电池以及用电装置
US20230261312A1 (en) End cover assembly, battery cell, battery, and electrical apparatus
WO2023005408A1 (zh) 电池单体、电池以及用电装置
WO2023028864A1 (zh) 泄压装置、电池单体、电池及用电设备
WO2023004723A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
CN218632347U (zh) 绝缘膜、电池单体、电池及用电装置
WO2023004824A1 (zh) 电池单体、电池、用电设备及电池单体的制造设备
CN116529941A (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
CN218351658U (zh) 电池单体、电池及用电设备
WO2023000184A1 (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
CN115693047A (zh) 端盖组件、电池单体、电池以及用电装置
WO2023272501A1 (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
WO2023050278A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023097469A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023097584A1 (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
WO2023004829A1 (zh) 电池单体、电池、用电装置及电池单体的制造方法和设备
WO2023000202A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023133855A1 (zh) 电池、用电设备及电池的制备方法和制备装置
WO2023087285A1 (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
CN216085201U (zh) 电池单体、电池及用电装置

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2021806119

Country of ref document: EP

Effective date: 20211124

ENP Entry into the national phase

Ref document number: 20237026248

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1020237026248

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2023547133

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

WWR Wipo information: refused in national office

Ref document number: 1020237026248

Country of ref document: KR

WWD Wipo information: divisional of initial pct application

Ref document number: 1020257042371

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 1020257042371

Country of ref document: KR

WWC Wipo information: continuation of processing after refusal or withdrawal

Ref document number: 1020237026248

Country of ref document: KR