WO2024007194A1 - 电池单体及其组装方法、电池、用电装置 - Google Patents

电池单体及其组装方法、电池、用电装置 Download PDF

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Publication number
WO2024007194A1
WO2024007194A1 PCT/CN2022/104144 CN2022104144W WO2024007194A1 WO 2024007194 A1 WO2024007194 A1 WO 2024007194A1 CN 2022104144 W CN2022104144 W CN 2022104144W WO 2024007194 A1 WO2024007194 A1 WO 2024007194A1
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WIPO (PCT)
Prior art keywords
adapter
assembly
battery cell
housing
connection part
Prior art date
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PCT/CN2022/104144
Other languages
English (en)
French (fr)
Inventor
林蹬华
陈龙
陈新祥
郑于炼
王鹏
金海族
Original Assignee
宁德时代新能源科技股份有限公司
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.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/104144 priority Critical patent/WO2024007194A1/zh
Publication of WO2024007194A1 publication Critical patent/WO2024007194A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular to a battery cell and its assembly method, batteries, and electrical devices.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • the battery includes at least one battery cell.
  • the battery cell includes a casing, an end cover and an electrode assembly arranged in the casing.
  • the end cover is provided with electrode terminals. Due to the structural limitations of the battery cell, its assembly process is complex and difficult to assemble. high.
  • the present application provides a battery cell and its assembly method, battery, and electrical device.
  • the battery cell assembly process is simple and easy to assemble.
  • the application provides a battery cell, including: a casing with an opening; an electrode assembly located in the casing, the electrode assembly including a tab; and an end cover assembly for closing the opening, and the end cover assembly includes an electrode.
  • Terminal adapter assembly, including a first adapter and a second adapter connected, the first adapter is used to connect to the electrode terminal, and the second adapter is used to connect to the pole lug; wherein, the first adapter
  • the adapter includes a first connection part and a second connection part. The first connection part is used to connect to the electrode terminal, and the second connection part is used to connect to the second adapter part. The first connection part can be folded relative to the second connection part. Bend settings.
  • the battery cell provided by the embodiment of the present application includes a casing, an electrode assembly, an end cap assembly and an adapter assembly.
  • the adapter assembly includes a first adapter and a second adapter.
  • the second adapter is connected to the electrode assembly.
  • the first adapter includes a first connection part and a second connection part
  • the second connection part is used to connect to the second adapter
  • the first connection part is used to connect to the electrode terminal, and then through the adapter
  • the connecting component realizes the connection requirements between the electrode component and the electrode terminal.
  • the second adapter of the adapter assembly can be connected to the electrode assembly first, and then the electrode assembly and the adapter assembly can be integrated into the housing, and then the electrode terminal can be connected to the first connection portion.
  • the first connecting portion is bent relative to the second connecting portion, which facilitates the end cover assembly to close the opening of the housing and connect with the housing, and avoids the problem that the end cover assembly cannot be assembled to the housing after the adapter assembly is connected to the electrode terminal. , reduce the difficulty of assembly and improve the yield of battery cells.
  • the strength of the first adapter is less than the strength of the second adapter.
  • the battery cell provided in the embodiment of the present application is conducive to reducing the movement of the end cover assembly to the opening position of the housing after being connected to the first connection part and closing the opening.
  • the bending difficulty of the first connecting part relative to the second connecting part is favorable, the assembly of the end cover assembly is facilitated and the assembly difficulty is reduced.
  • the first transfer member has multiple transfer layers that are stacked and electrically connected to each other.
  • the first adapter is arranged as described above.
  • this arrangement can reduce the difficulty of bending and facilitate the connection of the end cover assembly to the case. Body assembly.
  • the housing includes a first wall, the first wall is connected to the end cap assembly, the first end face of the electrode assembly faces the first wall, and the first end face is provided with a tab.
  • the battery cell provided in the embodiment of the present application facilitates the extraction of the tab through the above arrangement, and can also facilitate the connection between the tab and the electrode terminal through the adapter assembly.
  • the first end surface and the first wall are arranged along the first direction, and the first connecting portion is connected to one side of the second connecting portion along the first direction.
  • the entire end cover assembly can be turned over in the first direction, so that the first connecting part can be folded relative to the second connecting part. Bend it so that the end cover assembly is reliably fastened to the opening and connected to the shell.
  • the first end surface and the first wall are arranged along the first direction
  • the housing has an opening in the second direction
  • the first connecting portion is connected to one side of the second connecting portion in the third direction
  • the third direction The second direction is perpendicular to the first direction.
  • the entire end cover assembly can be flipped in the third direction, so that the first connection part can be bent relative to the second connection part And the end cover assembly is reliably fastened to the opening and connected to the shell.
  • first connecting part and the second connecting part are integral structures.
  • the battery cell provided by the embodiment of the present application makes the first connection part and the second connection part an integrated structure, and ensures the reliability of the connection between the first connection part and the second connection part, thereby ensuring the electrode assembly and the electrode terminal. Stability of electrical connections. Moreover, by making the first connecting part and the second connecting part have an integrated structure, the molding of the first adapter is facilitated.
  • the second adapter includes a third connection part and a fourth connection part, the third connection part is connected to the tab, and the fourth connection part is connected to the first adapter.
  • the second adapter includes a third connection part and a fourth connection part, and defines the third connection part to be connected to the tab, and the fourth connection part to be connected to the first adapter , which can ensure the electrical connection requirements between the second adapter, the tab and the first adapter.
  • the third connecting part and the fourth connecting part are integral structures.
  • the battery cell provided by the embodiment of the present application can ensure the reliability of the connection between the third connection part and the fourth connection part by making the third connection part and the fourth connection part have an integrated structure, thereby ensuring that the electrode assembly and the electrode terminal Connection stability. Moreover, by making the third connecting part and the fourth connecting part have an integrated structure, the molding of the second adapter is facilitated.
  • first adapter and the second adapter are separate structures, and the first adapter and the second adapter are at least partially stacked.
  • the first adapter and the second adapter have separate structures, and the first adapter and the second adapter are at least partially stacked, the first adapter can be ensured.
  • the electrical connection requirements between the adapter and the second adapter can simplify the molding method of the first adapter and the second adapter, especially when the first adapter and the second adapter are The molding of parts made of different materials.
  • the connection area between the first adapter part and the second adapter part can be increased, ensuring the connection strength when the two parts are separated.
  • the first adapter and the second adapter are an integral structure.
  • the connection process such as laser welding of the two can be omitted, and the first adapter and the second adapter can be ensured.
  • the strength of the connection between adapters can be ensured.
  • a clearance space is provided on the second adapter member, and the tab is at least partially located in the clearance space and connected to the second adapter member.
  • the battery cells provided in the embodiments of the present application can avoid the tabs by providing a clearance space on the second adapter, so that the tabs can pass through the clearance space and then be folded back to connect to the second adapter. This solution can reshape the tab to prevent the tab from being inserted into the electrode assembly.
  • the second adapter is provided with a clearance space along at least one side of the thickness direction of the electrode assembly.
  • a clearance space is provided on at least one side of the second adapter along the third direction, so that when the tab is located at one end of the electrode assembly in the first direction, it is convenient for the tab to connect with the second adapter.
  • the cooperation of the adapter ensures the reliability of the connection between the tab and the adapter.
  • an insulating film layer is provided between the tab and the second adapter, and the insulating film layer is used to protect the tab.
  • the battery cells provided in the embodiments of the present application can protect the tabs by providing an insulating film layer to prevent the tabs from being worn by the walls of the clearance space formed by the second adapter.
  • the battery cell further includes an insulating member, the insulating member is disposed on a side of the end cap assembly facing the electrode assembly, the surface of the insulating member facing the adapter assembly includes a first area, and the first area is opposite to the adapter assembly. and be arranged at least partially flush with the surface of the electrode terminal facing the adapter assembly.
  • the battery cell provided by the embodiment of the present application includes a first area by causing the insulating member to face the surface.
  • the first area is arranged opposite to the adapter component and is at least partially flush with the surface of the electrode terminal facing the adapter component.
  • openings are respectively formed at both ends of the housing in the second direction. Each opening is closed and provided with an end cover assembly, and the electrode terminal of at least one end cover assembly is connected to the tab through an adapter assembly.
  • the battery cells when openings are formed at both ends of the housing in the second direction and the electrode terminals of at least one end cap assembly are connected to the tabs through the adapter assembly, the battery cells are grouped together. time, which is conducive to the assembly of battery cells.
  • this application provides a battery, including a box and the above-mentioned battery cells, and the battery cells are accommodated in the box.
  • the present application provides an electrical device, including the above-mentioned battery cell, and the battery cell is used to provide electric energy.
  • this application provides a method of assembling a battery cell, including:
  • a housing, an electrode assembly, an end cover assembly and an adapter assembly are provided.
  • the housing has an opening, the electrode assembly includes tabs, the end cover assembly includes electrode terminals, and the adapter assembly includes a connected first adapter and a second adapter.
  • the first adapter part includes a first connection part and a second connection part, the second connection part is used to connect with the second adapter part, and the first connection part can be bent relative to the second connection part;
  • the first connecting part is bent relative to the second adapter member, so that the entire adapter component is located in the housing, and the end cap component closes the opening and is connected to the housing.
  • openings are respectively formed at both ends of the housing in the second direction, and the number of end cap assemblies is two.
  • the assembly method further includes: placing the electrode assembly into the housing. The other tab is connected to one of the two end cap assemblies.
  • the method further includes: connecting another terminal connected to the tab.
  • the cover assembly is configured to close the other opening and is connected to the housing.
  • Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a battery cell provided in an embodiment of the application.
  • Figure 4 is a schematic diagram of the exploded structure of a battery cell provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a switching component according to an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of the first connecting part of the first adapter member after being bent relative to the second connecting part according to an embodiment of the present application;
  • Figure 7 is a partial enlarged view of position A in Figure 6;
  • Figure 8 is a schematic structural diagram of a switching component according to another embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a second adapter according to an embodiment of the present application.
  • Figure 10 is a partial structural diagram of a battery cell according to an embodiment of the present application.
  • Figure 11 is a top view of a battery cell provided by an embodiment of the present application.
  • Figure 12 is a cross-sectional view along the B-B direction in Figure 11;
  • Figure 13 is an enlarged view of C in Figure 12;
  • Figure 14 is a schematic flow chart of a battery cell assembly method according to an embodiment of the present application.
  • 15 to 20 are structural schematic diagrams corresponding to some steps of a battery cell assembly method according to an embodiment of the present application.
  • 21-shell 21-shell; 211-opening; 212-first wall; 213-second wall; 214-third wall; 215-fourth wall;
  • 23-end cover assembly 231-end cover; 232-electrode terminal; 233-insulation piece; 2331-first zone;
  • 24-Transfer component 241-First adapter; 2411-First connection part; 2412-Second connection part; 241a-Transfer layer;
  • 242-Second adapter 2421-Third connection part; 2422-Fourth connection part; 2423-Giving space; 25-Insulating film layer;
  • a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in direct contact. Indirect contact through intermediaries.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • Current battery cells usually include a casing, an end cap assembly and an electrode assembly housed in the casing, and the casing is filled with electrolyte.
  • the electrode assembly is the component in the battery cell that undergoes electrochemical reactions.
  • the casing is the component that forms the internal environment of the battery cell.
  • the end cap assembly covers the opening of the casing to isolate the internal environment of the battery cell from the external environment. parts.
  • the tabs of the electrode assembly are usually electrically connected to the electrode terminals of the end cap assembly through adapters.
  • the tabs of the electrode assembly can be connected to the adapter first, and then the electrode terminals of the end cover assembly are connected to the adapter. Finally, the electrode assembly is placed into the case, and the end cover assembly closes the opening.
  • the inventor of the present application found through research that in some solutions that require the electrode assembly to be placed into the casing first, such as a solution in which two end cap assemblies are provided at both ends of the casing, the above assembly steps will be difficult to achieve.
  • the structure of the adapter can be improved. After the electrode assembly is placed in the case, the electrode terminal of the end cover assembly can be connected to the adapter through the adapter. The pole tabs are connected, and the opening is closed by the end cover assembly. It is suitable for the solution of placing the electrode assembly into the housing first, such as the solution of setting two end cover assemblies at both ends of the housing.
  • the inventor has designed a battery cell after in-depth research, including a casing, an electrode assembly, an end cap assembly and an adapter assembly.
  • the casing has an opening, and the electrodes
  • the component is arranged in the casing, and the electrode component includes pole tabs.
  • An end cap assembly is used to close the opening, and the end cap assembly includes electrode terminals.
  • the adapter assembly includes a connected first adapter piece and a second adapter piece.
  • the first adapter piece is used to connect to the electrode terminal, and the second adapter piece is used to connect to the pole tab.
  • the first adapter includes a first connection part and a second connection part.
  • the first connection part is used to connect to the electrode terminal, and the second connection part is used to connect to the second adapter.
  • the first connection part can be relative to the third connection part.
  • the two connecting parts are bent and set.
  • the adapter assembly includes a first adapter and a second adapter.
  • the second adapter is connected to the tab of the electrode assembly, because the first adapter includes a first connection part and a third adapter.
  • Two connecting parts, the second connecting part is used to connect with the second adapter, and the first connecting part is used to connect with the electrode terminal, and then the connection requirements between the electrode assembly and the electrode terminal are realized through the adapter component.
  • the second adapter of the adapter assembly can be connected to the electrode assembly first, and then the electrode assembly and the adapter assembly can be integrated into the housing, and then the electrode terminal can be connected to the first connection portion.
  • the first connecting portion is bent relative to the second connecting portion, which facilitates the end cover assembly to close the opening of the housing and connect with the housing, and avoids the problem that the end cover assembly cannot be assembled to the housing after the adapter assembly is connected to the electrode terminal. , reduce the difficulty of assembly and improve the yield of battery cells.
  • This application is suitable for solutions in which the electrode assembly needs to be placed into the casing first, such as a solution in which two end cap assemblies are provided at both ends of the casing.
  • Electrical devices can be vehicles, cell 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, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship 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, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000, but also can be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application
  • Figure 3 is a schematic exploded structural diagram of a battery cell provided by an embodiment of the present application.
  • the battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 .
  • the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 accommodation space 13.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12 .
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 is accommodated in the box 10 .
  • the battery 100 can also be in the form of a plurality of battery cells 20 connected in series, parallel or mixed to form a battery module 30, and then the plurality of battery modules 30 are connected in series, parallel or mixed to form a whole and accommodated in the box 10.
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells.
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • the battery cell 20 refers to the smallest unit that constitutes a battery.
  • the battery cell 20 includes a casing 21 , an electrode assembly 22 , an end cover assembly 23 and an adapter assembly 24 .
  • the casing 21 has an opening 211 .
  • the electrode assembly 22 is disposed in the casing 21 .
  • the electrode assembly 22 includes a tab 221 .
  • the end cap assembly 23 is used to close the opening 211 and includes an electrode terminal 232 .
  • the adapter assembly 24 includes a connected first adapter 241 and a second adapter 242. The first adapter 241 is used to connect to the electrode terminal 232, and the second adapter 242 is used to connect to the tab 221.
  • the first adapter 241 includes a first connection part 2411 and a second connection part 2412.
  • the first connection part 2411 is used to connect to the electrode terminal 232
  • the second connection part 2412 is used to connect to the second adapter 242.
  • the first connecting part 2411 can be bent relative to the second connecting part 2412.
  • the housing 21 is a component used to cooperate with the end cap assembly 23 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, electrolyte, and other components.
  • the housing 21 and the end cover assembly 23 may be independent components, and an opening 211 may be provided on the housing 21 .
  • the end cover assembly 23 covers the opening 211 at the opening 211 to form the internal environment of the battery cell 20 .
  • the housing 21 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 21 can be determined according to the specific shape and size of the electrode assembly 22 .
  • the housing 21 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.
  • the electrode assembly 22 is a component in the battery cell 20 where an electrochemical reaction occurs.
  • One or more electrode assemblies 22 may be contained within the housing 21 .
  • the electrode assembly 22 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and usually a separator is provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body of the electrode assembly 22
  • the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material constitute the tabs 221 respectively.
  • the positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively located at both ends of the main body.
  • the positive active material and the negative active material react with the electrolyte, and the tabs 221 are connected to the electrode terminals 232 to form a current loop.
  • the end cover assembly 23 refers to a component that covers the opening of the housing 21 to isolate the internal environment of the battery cell 20 from the external environment.
  • the shape of the end cap assembly 23 may be adapted to the shape of the housing 21 to fit the housing 21 .
  • the end cap assembly 23 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap assembly 23 is less likely to deform when subjected to extrusion and collision, so that the battery cell 20 can have better performance. With high structural strength, safety performance can also be improved.
  • the end cap assembly 23 includes an end cap 231 and an electrode terminal 232 provided on the end cap 231.
  • the electrodes included on the end cap assembly 23 The number of terminals 232 is two, and when the number of end cap assemblies 23 included in the battery cell 20 is two, the number of electrode terminals 232 included on each end cap assembly 23 is one and two end caps.
  • the electrode terminals 232 on assembly 23 are of opposite polarity.
  • the number of openings 211 of the housing 21 can be one, or of course, two.
  • the two openings 211 are arranged oppositely, and each opening 211 can cover an end cover assembly 23.
  • Each end cap assembly 23 is electrically connected to one of the tabs 221 .
  • the adapter assembly 24 is used to electrically connect the tabs 221 of the electrode assembly 22 with the electrode terminals 232 of the end cap assembly 23 .
  • the adapter component 24 can be made of metal.
  • first adapter 241 and the second adapter 242 may be of an integrated structure, or may be manufactured separately and then connected to each other through welding or other methods.
  • first connecting part 2411 and the second connecting part 2412 included in the first adapter 241 may be of an integrated structure, or of course may be of a split structure.
  • Optional one-piece structure may be of an integrated structure, or of course may be of a split structure.
  • first connecting portion 2411 and the second connecting portion 2412 may be entirely made of one layer of metal material, or of course may also be formed in the form of stacking multiple layers of metal material.
  • first adapter 241 and the second adapter 242 can be made of different materials.
  • the first connecting part 2411 and the second connecting part 2412 may extend along the same plane, that is, they may be on the same plane, and of course they may also intersect. set up.
  • the first connection part 2411 and the second connection part 2412 may be arranged to intersect or be stacked on each other.
  • the first connecting part 2411 before the first connecting part 2411 is connected to the electrode terminal 232, there is an included angle between the first connecting part 2411 and the second connecting part, and the included angle is greater than after the first connecting part 2411 is connected to the electrode terminal 232. , the angle between the first connecting part 2411 and the second connecting part 2412.
  • the first adapter 241 may use a conductor material with lower strength, so that the first connection part 2411 will have a negative impact on the first connection part 2411 under the action of an external force, such as the end cover 231 at the opening 211 assembled to the housing 21 . Under the action of pulling force, the first connecting part 2411 can move relative to the second connecting part 2412 and be bent.
  • both the first adapter 241 and the second adapter 242 may be in the form of adapter sheets.
  • first connecting portion 2411 and the electrode terminal 232 can be connected to each other by welding, and the second adapter 242 and the tab 221 can be connected by welding and other methods.
  • the battery cell 20 provided in the embodiment of the present application includes an adapter assembly 24.
  • the adapter assembly 24 includes a first adapter 241 and a second adapter 242.
  • the second adapter 242 and the tab of the electrode assembly 22 221 connection since the first adapter 241 includes a first connection part 2411 and a second connection part 2412, the second connection part 2412 is used to connect to the second adapter 242, and the first connection part 2411 is used to connect to the electrode terminal 232 connection, and then realize the connection requirement between the electrode assembly 22 and the electrode terminal 232 through the adapter assembly 24.
  • the second adapter 242 of the adapter assembly 24 can be connected to the electrode assembly 22, and then the electrode assembly 22 and the adapter assembly 24 can be integrated into the housing 21, and then the electrode terminals can be connected.
  • 232 is connected to the first connecting part 2411, and then the first connecting part 2411 is bent relative to the second connecting part 2412, which facilitates the end cover assembly 23 to close the opening 211 of the housing 21 and connect with the housing 21, and avoid the adapter assembly 24
  • the problem that the end cover assembly 23 cannot be assembled to the housing 21 after being connected to the electrode terminal 232 reduces the difficulty of assembly and improves the yield of the battery cell 20 .
  • the strength of the first adapter 241 is less than the strength of the second adapter 242 .
  • the first adapter 241 and the second adapter 242 can be made of the same material, by making the thickness of the first adapter 241 smaller than the thickness of the second adapter 242, to achieve the second adapter.
  • the strength of one adapter 241 is smaller than the strength requirement of the second adapter 242 .
  • the first adapter 241 and the second adapter 242 can both be made of copper, or of course, both can be made of aluminum.
  • the above-mentioned copper and aluminum materials are just examples for ease of understanding, and are not limited to the above materials. It can meet the strength requirements between the first adapter 241 and the second adapter 242 .
  • first adapter 241 and the second adapter 242 can also be made of different materials.
  • first adapter 241 can be made of a metal material with lower strength
  • second adapter 242 can be made of a metal material with a lower strength.
  • Metal materials with higher strength, through the above arrangement, can also meet the requirement that the strength of the first adapter 241 is smaller than that of the second adapter 242 .
  • the battery cell 20 provided in the embodiment of the present application makes the strength of the first adapter 241 smaller than the strength of the second adapter 242, which is beneficial to reducing the resistance of the end cover assembly 23 to the housing 21 after the connection with the first connection part 2411.
  • the bending difficulty of the first connecting part 2411 relative to the second connecting part 2412 facilitates the assembly of the end cover assembly 23 and reduces the difficulty of assembly.
  • the first adapter 241 has multiple adapter layers 241 a that are stacked and electrically connected to each other.
  • the first adapter 241 may include two, three or even more adapter layers 241a.
  • the multiple adapter layers 241a are stacked in sequence and then bent to form the first connecting portion 2411 and the second adapter layer 241a.
  • the transfer layer 241a may be made of metal foil, such as copper foil, aluminum foil, etc.
  • the battery cell 20 provided in the embodiment of the present application is configured such that the first adapter 241 has multiple adapter layers 241a that are stacked and electrically connected to each other.
  • this arrangement can reduce the difficulty of bending and facilitate the assembly of the end cover assembly 23 to the housing 21.
  • the housing 21 includes a first wall 212 , the first wall 212 is connected to the end cap assembly 23 , and the first end surface 222 of the electrode assembly 22 faces the first The wall 212 and the first end surface 222 are provided with tabs 221 .
  • the housing 21 may be in the shape of a square shell.
  • the housing 21 includes opposite first walls 212, second walls 213, third walls 214, and fourth walls 215.
  • the first walls 212 and the second walls 213 are spaced apart from each other.
  • the third wall 214 and the fourth wall 215 are spaced apart and oppositely arranged.
  • the third wall 214 is connected to the first wall 212 and the second wall 213
  • the fourth wall 215 is connected to the first wall 212 and the second wall 213 .
  • the first wall 212, the second wall 213, the third wall 214 and the fourth wall 215 together form an opening 211.
  • the number of tabs 221 provided on the first end surface 222 may be one, or of course, there may be two.
  • the two tabs 221 have opposite polarities and are spaced apart on the first end surface 222.
  • the battery cell provided in the embodiment of the present application facilitates the extraction of the tab 221 through the above arrangement, and also facilitates the connection between the tab 221 and the electrode terminal through the adapter assembly 24 .
  • first end surface 222 and the first wall 212 are arranged along the first direction Y, and the first connecting portion 2411 is connected to one side of the second connecting portion 2412 along the first direction Y.
  • the first direction Y can be the height direction of the housing 21 .
  • the first connecting portion 2411 may be connected to a side of the second connecting portion 2412 close to the tab 221 along the first direction Y.
  • the first connecting part 2411 may be connected to the side of the second connecting part 2412 close to the first wall 212 along the first direction Y.
  • first connecting part 2411 may be bent along the first direction Y relative to the second connecting part 2412.
  • the entire end cover assembly 23 can be flipped in the first direction, so that the first connection part 2411 can be relative to the second
  • the two connecting parts 2412 are bent so that the end cover assembly 23 is reliably engaged with the opening 211 to connect with the housing 21 .
  • connecting the first connecting part 2411 to one side of the second connecting part 2412 along the first direction Y is only an optional example, but is not limited to the above method.
  • the first end surface 222 and the first wall 212 are arranged along the first direction Y
  • the housing 21 has an opening 211 in the second direction X
  • the first connecting portion 2411 connects On the side of the second connecting portion 2412 in the third direction Z, the third direction Z, the second direction X and the first direction Y are each perpendicular to each other.
  • the housing 21 may have one opening 211 in the second direction X, or of course, two openings, optionally two.
  • the second connecting part 2412 has two opposite sides in the third direction Z, and the first connecting part 2411 is connected to any side of the second connecting part 2412 in the third direction Z.
  • first connecting part 2411 may be bent in the third direction Z relative to the second connecting part 2412.
  • the second direction Y can be selected as the length direction of the housing 21
  • the third direction Z can be selected as the width direction of the housing 21 .
  • the battery cell 20 provided in the embodiment of the present application has the above arrangement, so that after the first connection part 2411 is connected to the electrode terminal 232, the entire end cover assembly 23 can be flipped in the third direction Z, so that the first connection part 2411 can It is bent relative to the second connecting portion 2412 so that the end cover assembly 23 is reliably engaged at the opening 211 to connect with the housing 21 .
  • the first connection part 2411 and the second connection part 2412 are of an integrated structure.
  • first connecting part 2411 and the second connecting part 2412 have an integrated structure, which means that they are a whole body and can be formed simultaneously.
  • first connecting part 2411 and the second connecting part 2412 can be formed by injection molding.
  • first connecting part 2411 and the second connecting part 2412 can be formed by bending an integrated plate-like structure.
  • first transfer member 241 has multiple transfer layers 241a that are stacked and electrically connected to each other, part of each transfer layer 241a is used to form the first connection part 2411, and part is used to form the third connection part 2411.
  • the multi-layer transfer layer 241a is first stacked in sequence and then bent to form an integrated first connecting part 2411 and a second connecting part 2412.
  • the battery cell 20 provided in the embodiment of the present application ensures the reliability of the connection between the first connection part 2411 and the second connection part 2412 by making the first connection part 2411 and the second connection part 2412 have an integrated structure.
  • the molding of the first adapter 241 is facilitated.
  • the second adapter 242 includes a third connecting part 2421 and a fourth connecting part 2422 .
  • the third connecting part 2421 is connected to the tab 221
  • the fourth connecting part 2422 is connected to the tab 221 .
  • 2422 is connected to the first adapter 241.
  • the third connecting part 2421 and the fourth connecting part 2422 may each be in the form of a sheet-like structure.
  • the third connecting part 2421 and the fourth connecting part 2422 may be arranged to intersect, or optionally may be arranged perpendicular to each other.
  • the fourth connecting part 2422 may be provided at one end of the third connecting part 2421, and the second adapter 242 is in an "L" shape as a whole.
  • the tab 221 may be stacked with the third connection part 2421 in the first direction Y and connected to the third connection part 2421.
  • Optional methods such as laser welding can be used to connect to each other.
  • the fourth connecting part 2422 may be stacked with the second connecting part 2412 and connected to each other, and may optionally be connected to each other by laser welding or other methods.
  • the second adapter 242 includes a third connection part 2421 and a fourth connection part 2422, and defines the third connection part 2421 to be connected to the tab 221, and the fourth connection part 2422 Connecting with the first adapter 241 can ensure the electrical connection requirements between the second adapter 242 and the tab 221 and the first adapter 241 .
  • the third connecting part 2421 and the fourth connecting part 2422 are integrated structures.
  • the third connecting part 2421 and the fourth connecting part 2422 can be formed by injection molding.
  • the third connecting part 2421 and the fourth connecting part 2422 can be formed by bending an integrated plate-like structure.
  • the battery cell 20 provided in the embodiment of the present application can ensure the reliability of the connection of the third connection part 2421 and the fourth connection part 2422 by making the third connection part 2421 and the fourth connection part 2422 have an integrated structure, thereby ensuring The stability of the connection between the electrode assembly 22 and the electrode terminal 232.
  • the molding of the second adapter 242 is facilitated.
  • first adapter 241 and the second adapter 242 are separate structures, and the first adapter 241 and the second adapter 242 are at least partially stacked.
  • first adapter 241 and the second adapter 242 may be separately formed and then connected to each other through laser welding or other methods.
  • the second connecting portion 2412 of the first adapter 241 and the fourth connecting portion 2422 of the second adapter 242 can be stacked and connected to each other.
  • they can be connected to each other by laser welding.
  • the entire first adapter 241 may be disposed on a surface of the third connecting part 2421 facing away from the fourth connecting part 2422.
  • the first adapter 241 and the second adapter 242 have a separate structure, and the first adapter 241 and the second adapter 242 are at least partially stacked.
  • the electrical connection requirement between the first adapter 241 and the second adapter 242 can be ensured.
  • this arrangement can simplify the molding of the first adapter 241 and the second adapter 242, especially when the first adapter 241 and the second adapter 242 are made of different materials.
  • the connection area between the first adapter 241 and the second adapter 242 can be increased, ensuring that they are separated when they are installed separately. connection strength.
  • split structure of the first adapter 241 and the second adapter 242 is only an optional implementation, but is not limited to the above approach.
  • first adapter 241 and the second adapter 242 can also be made into an integrated structure.
  • one of the first adapter 241 and the second adapter 242 can be L-shaped and the other Flat plate shape.
  • the connection process such as laser welding of the two can be omitted, and the first adapter can be ensured 241 and the second adapter 242.
  • the second adapter 242 is provided with a clearance space 2423 , and the tab 221 is at least partially located in the clearance space 2423 and connected with the second adapter. 242 connections.
  • the allowance space 2423 may be in the form of a gap formed by removing part of the material on the second adapter 242 .
  • the clearance space 2423 is used to avoid the pole tabs 221 so that the pole tabs 221 can pass through the clearance space 2423 and then be folded and covered on the surface of the second adapter 242 facing the housing 21 to ensure that the pole tabs 221 are in contact with the second adapter. Electrical connection requirements between connectors 242.
  • the relief space 2423 may be in the form of a closed-loop through groove.
  • the relief space 2423 may also be in the form of a non-closed-loop through-groove having an opening 211 .
  • the battery cell 20 provided in the embodiment of the present application can avoid the tabs 221 by providing a clearance space 2423 on the second adapter 242, so that the tabs 221 can pass through the clearance space 2423 and then turn around to connect with the second turning member. Connector 242 connects. This solution can reshape the tab 221 to prevent the tab 221 from being inserted into the electrode assembly 22 .
  • the second adapter 242 is provided with a clearance space 2423 along at least one side of the thickness direction of the electrode assembly 22 .
  • the second adapter 242 can be provided with a relief space 2423 on one side of the electrode assembly 22 in the thickness direction, or the housing 21 can be provided with a relief space 2423 on both sides of the electrode assembly 22 in the thickness direction.
  • the allowance space 2423 can be formed by a recess along the thickness direction of the second adapter 242 starting from the end surface of the electrode assembly 22 in the thickness direction.
  • the allowance space 2423 may be formed in the third connecting part 2421.
  • the thickness direction of the electrode assembly 22 can be selected as the third direction Z in the figure.
  • the second adapter 242 is provided with a clearance space 2423 on at least one side of the third direction Z, so that the tab 221 is located at one end of the electrode assembly 22 in the first direction Y. This facilitates the cooperation between the pole tab 221 and the second adapter 242 and ensures the reliability of the connection between the pole tab 221 and the second adapter 242 .
  • an insulating film layer 25 is provided between the tab 221 and the second adapter 242 , and the insulating film layer 25 is used to protect the tab 221 .
  • the side of the wall of the second adapter 242 that forms the clearance space 2423 facing the tab 221 is covered with an insulating film layer 25 to protect the tab. 221.
  • the battery cell 20 provided in the embodiment of the present application can protect the tab 221 by providing the insulating film layer 25 to prevent the tab 221 from being worn by the wall surface of the clearance space 2423 formed by the second adapter 242 .
  • the battery unit 20 further includes an insulating member 233 , which is disposed on the side of the end cap assembly 23 facing the electrode assembly 22 , and the insulating member 233 faces the electrode assembly 22 .
  • the surface includes a first region 2331 that is opposite the adapter component 24 and is at least partially flush with the surface of the electrode terminal 232 facing the adapter component 24 .
  • the insulating member 233 is used to insulate the end cap 231 from the electrode terminal 232 .
  • the first area 2331 may be disposed opposite the adapter assembly 24 in the second direction X of the housing 21 , and the orthographic projection of the first area 2331 in the second direction X may cover part or all of the adapter assembly 24 .
  • the battery cell 20 provided by the embodiment of the present application includes a first area 2331 by causing the insulating member 233 to face the surface.
  • the first area 2331 is arranged opposite to the adapter component 24 and is at least partially flat with the surface of the electrode terminal 232 facing the adapter component 24 .
  • openings 211 are respectively formed at both ends of the housing 21 in the second direction
  • the connecting component 24 is connected to the pole lug 221.
  • openings 211 are respectively formed at both ends of the housing 21 in the second direction
  • the pole tabs 221 are connected.
  • the end cap assemblies 23 at the two openings 211 can also be connected to the pole tabs 221 through the adapter assembly 24 mentioned in the above embodiments.
  • openings 211 are respectively formed at both ends of the housing 21 in the second direction , so that when the battery cells 20 are grouped, it is convenient to assemble the battery cells 20 .
  • the present application provides a battery, including a box and the above-mentioned battery cell 20, and the battery cell 20 is accommodated in the box.
  • the present application provides an electrical device, which includes the above-mentioned battery cell 20.
  • the battery cell 20 is used to provide electric energy.
  • the present application provides a method of assembling a battery cell 20 .
  • the assembly method can be used to form the battery cell 20 provided in the above embodiments.
  • the assembly method includes:
  • the housing 21 has an opening 211
  • the electrode assembly 22 includes a tab 221
  • the end cover assembly 23 includes an electrode terminal 232
  • the adapter assembly 24 includes The first adapter 241 and the second adapter 242 are connected.
  • the first adapter 241 includes a first connecting part 2411 and a second connecting part 2412.
  • the second connecting part 2412 is used to connect with the second adapter 242 For connection, the first connecting part 2411 can be bent relative to the second connecting part 2412.
  • step S100 the provided housing 21, electrode assembly 22, end cap assembly 23 and adapter assembly 24 are provided separately from each other, and the first adapter 241 and the second adapter 242 of the adapter assembly 24 At the same time, the first connection part 2411 and the second connection part 2412 can be in a flat state on the same plane.
  • the first connection part 2411 and the second connection part 2412 can also be arranged to intersect.
  • the provided housing 21 may have one opening 211.
  • it may also have two openings 211.
  • the two openings 211 are arranged oppositely in the second direction X.
  • the second adapter 242 and the tab 221 may be connected to each other by laser welding or other methods.
  • the tab 221 can pass through the relief space 2423 in the first direction Y and then be folded back and stacked on the second adapter 242 and connected with the second adapter.
  • the connector 242 is welded and connected.
  • step S300 the electrode assembly 22 is placed into the housing 21, so that the electrode assembly 22 and its connected adapter assembly 24 extend into the interior of the housing 21 through the opening 211 on one side of the housing 21. .
  • step S400 the first connection part 2411 of the first adapter 241 is connected to the electrode terminal 232, and the first connection part 2411 and the electrode terminal 232 may be connected to each other by laser welding or other methods.
  • step S500 when the first connecting part 2411 is connected to one side of the second connecting part 2412 in the first direction Y, the first connecting part 2411 may be turned over in the first direction Y and relative to the first connecting part 2411.
  • the two connecting parts 2412 are bent.
  • the first connecting part 2411 When the first connecting part 2411 is connected to one side of the second connecting part 2412 in the third direction Z, the first connecting part 2411 can be turned over in the third direction Z and bent relative to the second connecting part 2412.
  • the assembly method of the battery cell 20 provides an adapter component 24, which is limited to include a connected first adapter 241 and a second adapter 242.
  • the first adapter 241 It includes a first connecting part 2411 and a second connecting part 2412.
  • the second connecting part 2412 is used to connect with the second adapter 242.
  • the first connecting part 2411 can be bent relative to the second connecting part 2412, and firstly turn the adapter After the second adapter 242 of the adapter assembly 24 is connected to the tab 221, the whole body is placed in the housing 21, and then the first connection portion 2411 of the first adapter 241 is connected to the electrode terminal 232. Due to the first connection The portion 2411 can be bent relative to the second connecting portion 2412.
  • the first connecting portion 2411 can be at least partially bent relative to the second adapter 242, so that the entire adapter assembly 24 is located within the housing 21.
  • the end cover assembly 23 closes the opening 211 and is connected to the housing 21, which can reduce the installation difficulty of the end cover assembly 23.
  • the housing 21 is formed with openings 211 at both ends of the second direction X, and the number of end cover assemblies 23 is two.
  • the method further includes: connecting the other tab 221 of the electrode assembly 22 with one of the two end cap assemblies 23.
  • the tab 221 and the end cover assembly 23 can be connected through an adapter structure.
  • the transition structure can be the structural form of the transition component 24 provided in the above embodiments, and of course can also be in the form of a common transition piece, as long as the electrical connection requirements between the tab 221 and the end cover assembly 23 can be ensured. Can.
  • step S300 the other tab 221 is first connected to one of the two end cover assemblies 23, and the connection is made outside the casing 21.
  • the operation is simple, and The connection quality can be ensured, and the installation of the electrode assembly 22 into the housing 21 will not be interfered with after connection.
  • the assembly method of the battery cell 20 provided by the embodiment of the present application after step S300 and before step S400, the assembly method further includes: connecting another end cap assembly 23 connected to the tab 221 Another opening 211 is closed and connected to the housing 21 .
  • the position of one end cover assembly 23 and the housing 21 can be fixed first, and then the other end cover assembly 23 can be installed, thereby improving the installation efficiency and at the same time It is possible to avoid affecting the connection between the end cover assembly 23 and the adapter assembly 24 when both end cover assemblies 23 are in an unfixed state.
  • the method before step S300 and after step S200, the method further includes covering the electrode assembly 22 with a protective film layer 26, so that the electrode assembly 24 is in contact with the shell after being installed into the housing 21.
  • the bodies 21 are insulated.
  • the electrode assembly 24 can be insulated from the case 21 after being installed in the case 21, thereby improving the safety of the formed battery cell 20. performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种电池单体及其组装方法、电池、用电装置，电池单体包括：壳体，具有开口；电极组件，设于壳体内，电极组件包括极耳；端盖组件，用于封闭开口，端盖组件包括电极端子；转接组件，包括相连接的第一转接件以及第二转接件，第一转接件用于与电极端子连接，第二转接件用于与极耳连接；其中，第一转接件包括第一连接部以及第二连接部，第一连接部用于与电极端子连接，第二连接部用于与第二转接件连接，第一连接部能够相对第二连接部折弯设置。电池单体易于组装且成品率高。

Description

电池单体及其组装方法、电池、用电装置 技术领域
本申请涉及电池领域，特别涉及一种电池单体及其组装方法、电池、用电装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
电池包括至少一个电池单体，电池单体包括壳体、端盖和设置在壳体内的电极组件，端盖上设置有电极端子，受电池单体的结构限制，其组装工序操作复杂，组装难度高。
发明内容
鉴于上述问题，本申请提供一种电池单体及其组装方法、电池、用电装置，电池单体组装工序简单，易于组装。
第一方面，本申请提供了一种电池单体，包括：壳体，具有开口；电极组件，设于壳体内，电极组件包括极耳；端盖组件，用于封闭开口，端盖组件包括电极端子；转接组件，包括相连接的第一转接件以及第二转接件，第一转接件用于与电极端子连接，第二转接件用于与极耳连接；其中，第一转接件包括第一连接部以及第二连接部，第一连接部用于与电极端子连接，第二连接部用于与第二转接件连接，第一连接部能够相对第二连接部折弯设置。
本申请实施例提供的电池单体，包括壳体、电极组件、端盖组件以及转接组件，转接组件包括第一转接件以及第二转接件，第二转接件与电极组件的极耳连接，由于第一转接件包括第一连接部以及第二连接部，第二连接部用于与第二转接件连接，而第一连接部用于与电极端子连接，进而通过转接组件实现电极组件与电极端子之间的连接需求。并且，电池单体在成型时，可以先将转接组件的第二转接件与电极组件连接后将电极组件与转接组件整体装入壳体内，然后将电极端子与第一连接部连接，再使得第一连接部相对第二连接部折弯设置，利于端盖组件封闭壳体的开口并与 壳体连接，避免转接组件与电极端子连接后端盖组件无法装配至壳体问题的发生，降低组装难度，提高电池单体的成品率。
在一些实施例中，第一转接件的强度小于第二转接件的强度。
本申请实施例提供的电池单体，通过使得第一转接件的强度小于第二转接件的强度，利于降低端盖组件与第一连接部连接后向壳体的开口位置移动并封闭开口时，第一连接部相对第二连接部的折弯难度，利于端盖组件的装配，降低装配难度。
在一些实施例中，第一转接件具有多层层叠设置并彼此电连接的转接层。
本申请实施例提供的电池单体，第一转接件通过上述设置，当第一连接部相对第二连接部折弯设置时，该种设置方式能够降低折弯难度，利于端盖组件至壳体的装配。
在一些实施例中，其中，壳体包括第一壁，第一壁与端盖组件连接，电极组件的第一端面朝向第一壁，第一端面设置有极耳。
本申请实施例提供的电池单体，通过上述设置，利于极耳的引出，同时能够便于极耳通过转接组件与电极端子连接。
在一些实施例中，第一端面和第一壁沿第一方向排列，第一连接部连接于第二连接部沿第一方向的一侧。
本申请实施例提供的电池单体，通过上述设置，使得当第一连接部与电极端子连接后，端盖组件整体可以在第一方向上翻转，使得第一连接部能够相对第二连接部折弯并使得端盖组件可靠的扣接在开口处并与壳体连接。
在一些实施例中，第一端面和第一壁沿第一方向排列，壳体在第二方向具有开口，第一连接部连接于第二连接部在第三方向的一侧，第三方向、第二方向与第一方向两两垂直。
本申请实施例提供的电池单体，通过上述设置，使得当第一连接部与电极端子连接后，端盖组件整体可以在第三方向上翻转，使得第一连接部能够相对第二连接部折弯并使得端盖组件可靠的扣接在开口处并与壳体连接。
在一些实施例中，第一连接部以及第二连接部为一体式结构。
本申请实施例提供的电池单体，通过使得第一连接部以及第二连接部为一体式结构，通过保证第一连接部以及第二连接部连接的可靠性，进而使得保证电极组件与电极端子电连接的稳定性。并且，通过使得第一连接部以及第二连接部为一体式结构，利于第一转接件的成型。
在一些实施例中，第二转接件包括第三连接部以及第四连接部，第三连接部与 极耳连接，第四连接部与第一转接件连接。
本申请实施例提供的电池单体，通过使得第二转接件包括第三连接部以及第四连接部，并限定第三连接部与极耳连接，第四连接部与第一转接件连接，能够保证第二转接件与极耳以及第一转接件之间的电连接需求。
在一些实施例中，第三连接部以及第四连接部为一体式结构。
本申请实施例提供的电池单体，通过使得第三连接部以及第四连接部为一体式结构，能够保证第三连接部以及第四连接部连接的可靠性，进而使得保证电极组件与电极端子连接的稳定性。并且，通过使得第三连接部以及第四连接部为一体式结构，利于第二转接件的成型。
在一些实施例中，第一转接件与第二转接件为分体结构，第一转接件以及第二转接件至少部分层叠设置。
本申请实施例提供的电池单体，通过使得第一转接件与第二转接件为分体结构，第一转接件以及第二转接件至少部分层叠设置，既能够保证第一转接件以及第二转接件之间的电连接需求，同时，该种设置形式能够简化第一转接件以及第二转接件的成型方式，尤其当第一转接件与第二转接件采用不同材料时的成型。并且，通过使得第一转接件以及第二转接件至少部分层叠设置，能够增加第一转接件与第二转接件之间的连接面积，保证二者分体设置时的连接强度。
在一些实施例中，第一转接件以及第二转接件为一体式结构。
本申请实施例提供的电池单体，当第一转接件与第二转接件采用一体式结构时，能够省去二者激光焊接等连接工序，且能够保证第一转接件以及第二转接件之间的连接强度。
在一些实施例中，第二转接件上设置有让位空间，极耳至少部分位于让位空间并与第二转接件连接。
本申请实施例提供的电池单体，通过在第二转接件上设置让位空间，能够对极耳进行避让，使得极耳可通过让位空间后回折与第二转接件连接。该方案能够对极耳进行整形，防止极耳插入电极组件内。
在一些实施例中，第二转接件沿电极组件的厚度方向的至少一侧设置有让位空间。
本申请实施例提供的电池单体，通过使得第二转接件沿第三方向的至少一侧设置有让位空间，使得极耳位于电极组件在第一方向的一端时利于极耳与第二转接件的配合，保证极耳与转接件之间的连接的可靠性。
在一些可选地实施例中，极耳与第二转接件之间设置有绝缘膜层，绝缘膜层用于防护极耳。
本申请实施例提供的电池单体，通过设置绝缘膜层，能够对极耳进行防护，避免极耳被第二转接件形成让位空间的壁面磨损。
在一些实施例中，电池单体还包括绝缘件，绝缘件设置于端盖组件朝向电极组件的一侧，绝缘件朝向转接组件的表面包括第一区，第一区与转接组件相对设置并与电极端子朝向转接组件的表面至少部分平齐设置。
本申请实施例提供的电池单体，通过使得绝缘件朝向表面包括第一区，第一区与转接组件相对设置并与电极端子朝向转接组件的表面至少部分平齐设置，当电极端子与转接组件的第一转接件连接后，通过折弯第一转接件，使得第一连接部相对于第二连接部折弯的过程中，绝缘件不会与转接组件发生干涉，保证端盖组件整体可以封闭壳体的开口设置并与壳体连接。
在一些实施例中，壳体在第二方向的两端分别形成有开口，每个开口封闭设置有端盖组件，至少一个端盖组件的电极端子通过转接组件与极耳连接。
本申请实施例提供的电池单体，当壳体在第二方向的两端分别形成有开口并使得至少一个端盖组件的电极端子通过转接组件与极耳连接，使得电池单体在成组时，利于电池单体的装配。
第二方面，本申请提供了一种电池，包括箱体以及上述的电池单体，电池单体容纳于箱体内。
第三方面，本申请提供了一种用电装置，包括上述的电池单体，电池单体用于提供电能。
第四方面，本申请提供了一种电池单体的组装方法，包括：
提供壳体、电极组件、端盖组件以及转接组件，壳体具有开口，电极组件包括极耳，端盖组件包括电极端子，转接组件包括相连接的第一转接件以及第二转接件，第一转接件包括第一连接部以及第二连接部，第二连接部用于与第二转接件连接，第一连接部能够相对第二连接部折弯设置；
将第二转接件与极耳连接；
将电极组件放入壳体内；
将第一转接件的第一连接部与电极端子连接；
将第一连接部相对第二转接件折弯设置，以使得转接组件整体位于壳体内，且端盖组件封闭开口并与壳体连接。
在一些实施例中，壳体在第二方向的两端分别形成有开口，端盖组件的数量为两个，在将电极组件放入壳体内的步骤之前，组装方法还包括：将电极组件的另一个极耳与两个端盖组件中的一者连接。
在一些实施例中，将电极组件放入壳体内的步骤之后且在将第一转接件的第一连接部与电极端子连接的步骤之前，方法还包括：将另一个与极耳连接的端盖组件封闭另一个开口设置并与壳体连接。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本申请一实施例提供的车辆的结构示意图；
图2是本申请一实施例提供的电池的结构示意图；
图3是申请一实施例提供的一种电池单体的结构示意图；
图4是本申请一实施例提供的一种电池单体的分解结构示意图；
图5是本申请一个实施例的转接组件的结构示意图；
图6是本申请一实施例第一转接件中第一连接部相对于第二连接部折弯后的结构示意图；
图7是图6中A处的局部放大图；
图8是本申请另一个实施例的转接组件的结构示意图；
图9是本申请一实施例的第二转接件的结构示意图；
图10是本申请一实施例的电池单体的局部结构示意图；
图11是本申请一实施例提供的电池单体的俯视图；
图12是图11中沿B-B方向的剖视图；
图13是图12中C处放大图；
图14是本申请一个实施例的电池单体的组装方法的流程示意图；
图15至图20是本申请一个实施例的电池单体的组装方法部分步骤对应的结构示意图。
具体实施方式中的附图标号如下：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；13-容纳空间；
20-电池单体；30-电池模块；
21-壳体；211-开口；212-第一壁；213-第二壁；214-第三壁；215-第四壁；
22-电极组件；221-极耳；222-第一端面；
23-端盖组件；231-端盖；232-电极端子；233-绝缘件；2331-第一区；
24-转接组件；241-第一转接件；2411-第一连接部；2412-第二连接部；241a-转接层；
242-第二转接件；2421-第三连接部；2422-第四连接部；2423-让位空间；25-绝缘膜层；
26-保护膜层；
Y-第一方向；X-第二方向；Z-第三方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
需要注意的是，除非另有说明，本申请实施例使用的技术术语或者科学术语应当为本申请实施例所属领域技术人员所理解的通常意义。
在本申请实施例的描述中，技术术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
此外，技术术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例的描述中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
目前的电池单体通常包括壳体、端盖组件和容纳在壳体内的电极组件，并在壳体内填充电解质。电极组件是电池单体中发生电化学反应的部件，壳体是形成电池单体的内部环境的组件，端盖组件是盖合于壳体的开口处以将电池单体的内部环境隔绝于外部环境的部件。
相关技术中，电极组件的极耳通常通过转接件与端盖组件的电极端子电连接。电池单体的装配过程中，电极组件的极耳可以先与转接件连接，然后将端盖组件的电极端子与转接件连接，最后将电极组件放入壳体内，端盖组件封闭开口。
本申请的发明人研究发现，在一些需要将电极组件先放入壳体中的方案中，例如壳体两端设置两个端盖组件的方案，上述装配步骤将难以实现。
为了缓解电池单体组装难度高的问题，申请人研究发现，可以对转接件的结构进行改进，可以在将电极组件放入壳体内后，再将端盖组件的电极端子通过转接件与极耳连接，并通过端盖组件封闭开口，适用于将电极组件先放入壳体中的方案，例如壳体两端设置两个端盖组件的方案。
基于以上考虑，为了解决电池单体组装难度高的问题，发明人经过深入研究，设计了一种电池单体，包括壳体、电极组件、端盖组件以及转接组件，壳体具有开口，电极组件设于壳体内，电极组件包括极耳。端盖组件用于封闭开口，端盖组件包括电极端子。转接组件包括相连接的第一转接件以及第二转接件，第一转接件用于与电极端子连接，第二转接件用于与极耳连接。其中，第一转接件包括第一连接部以及第二连接部，第一连接部用于与电极端子连接，第二连接部用于与第二转接件连接， 第一连接部能够相对第二连接部折弯设置。
在这样的电池单体中，转接组件包括第一转接件以及第二转接件，第二转接件与电极组件的极耳连接，由于第一转接件包括第一连接部以及第二连接部，第二连接部用于与第二转接件连接，而第一连接部用于与电极端子连接，进而通过转接组件实现电极组件与电极端子之间的连接需求。并且，电池单体在成型时，可以先将转接组件的第二转接件与电极组件连接后将电极组件与转接组件整体装入壳体内，然后将电极端子与第一连接部连接，再使得第一连接部相对第二连接部折弯设置，利于端盖组件封闭壳体的开口并与壳体连接，避免转接组件与电极端子连接后端盖组件无法装配至壳体问题的发生，降低组装难度，提高电池单体的成品率。本申请适用于需要将电极组件先放入壳体中的方案中，例如壳体两端设置两个端盖组件的方案。
本申请实施例描述的技术方案适用于电池以及用电装置。
用电装置可以是车辆、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装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池单体、电池以及用电装置，还可以适用于所有包括端盖组件的电池以及使用电池的用电设备，但为描述简洁，下述实施例均以电动车辆为例进行说明。
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可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆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。
请参照图2以及图3，图2为本申请一实施例提供的电池的结构示意图；图3为本申请一实施例提供的一种电池单体的分解结构示意图。电池100包括箱体10和电池单体20，电池单体20容纳于箱体10内。其中，箱体10用于为电池单体20提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间13。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开口侧，以使第一部分11与第二部分12共同限定出容纳空间13。第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内。当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块30形式，多个电池模块30再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3至图5所示，电池单体20是指组成电池的最小单元。电池单体20包括有壳体21、电极组件22、端盖组件23以及转接组件24，壳体21具有开口211，电极组件22设于壳体21内，电极组件22包括极耳221。端盖组件23用于封闭开口211，端盖组件23包括电极端子232。转接组件24包括相连接的第一转接件241以及第二转接件242，第一转接件241用于与电极端子232连接，第二转接件242用于与极耳221连接，其中，第一转接件241包括第一连接部2411以及第二连接部2412，第一连接部2411用于与电极端子232连接，第二连接部2412用于与第二转接件242连接，第一连接部2411能够相对第二连接部2412折弯设置。
可选地，壳体21是用于配合端盖组件23以形成电池单体20的内部环境的组 件，其中，形成的内部环境可以用于容纳电极组件22、电解液以及其他部件。壳体21和端盖组件23可以是独立的部件，可以于壳体21上设置开口211，通过在开口211处使端盖组件23盖合开口211以形成电池单体20的内部环境。壳体21可以是多种形状和多种尺寸的，例如长方体形、圆柱体形、六棱柱形等。具体地，壳体21的形状可以根据电极组件22的具体形状和尺寸大小来确定。壳体21的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
可选地，电极组件22是电池单体20中发生电化学反应的部件。壳体21内可以包含一个或更多个电极组件22。电极组件22主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件22的主体部，正极片和负极片不具有活性物质的部分各自构成极耳221。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳221连接电极端子232以形成电流回路。
可选地，端盖组件23是指盖合于壳体21的开口处以将电池单体20的内部环境隔绝于外部环境的部件。不限地，端盖组件23的形状可以与壳体21的形状相适应以配合壳体21。可选地，端盖组件23可以由具有一定硬度和强度的材质(如铝合金)制成，这样，端盖组件23在受挤压碰撞时就不易发生形变，使电池单体20能够具备更高的结构强度，安全性能也可以有所提高。
可选地，端盖组件23包括端盖231以及设置于端盖231上的电极端子232，当电池单体20所包括的端盖组件23数量为一个时，端盖组件23上所包括的电极端子232的数量为两个，而当电池单体20所包括的端盖组件23的数量为两个时，每个端盖组件23上所包括的电极端子232的数量为一个且两个端盖组件23上的电极端子232的极性相反。
相应的，壳体21的开口211的数量可以为一个，当然也可以为两个，当为两个时，两个开口211相对设置，每个开口211处均可以盖合一个端盖组件23，每个端盖组件23与其中一个极耳221电连接。
可选地，转接组件24用于将电极组件22的极耳221与端盖组件23的电极端子232电连接。转接组件24可选为金属材质。
可选地，第一转接件241与第二转接件242可以是一体式结构，当然也可以采用分体制造后通过焊接等方式相互连接。
可选地，第一转接件241所包括的第一连接部2411以及第二连接部2412可 以为一体式结构，当然也可以为分体式结构。可选为一体式结构。
可选地，第一连接部2411以及第二连接部2412整体可以由一层金属材料层制成，当然也可以由多层金属材料层层叠的形式形成。
可选地，第一转接件241以及第二转接件242之间可以不同材料制成，
可选地，第一连接部2411在与电极端子232连接之前，第一连接部2411与第二连接部2412可以沿同一平面延展，即，二者可以在同一平面上，当然二者也可以相交设置。第一连接部2411在与电极端子232连接之后，第一连接部2411与第二连接部2412之间可以相交设置或者相互层叠设置。
可选地，第一连接部2411在与电极端子232连接之前，第一连接部与第二连接部之间具有夹角，且夹角的角度大于第一连接部2411在与电极端子232连接之后，第一连接部2411与第二连接部2412之间的夹角。
可选地，第一转接件241可以采用强度较低的导体材料，使得第一连接部2411在外力作用下例如端盖231在装配至壳体21的开口211处对第一连接部2411产生拉力的作用下，第一连接部2411能够相对第二连接部2412运动并折弯设置。
可选地，第一转接件241以及第二转接件242均可以呈转接片状体。
可选地，第一连接部2411与电极端子232之间可以采用焊接等方式相互连接，第二转接件242与极耳221之间可以采用焊接等方式相互连接。
本申请实施例提供的电池单体20，其包括转接组件24，转接组件24包括第一转接件241以及第二转接件242，第二转接件242与电极组件22的极耳221连接，由于第一转接件241包括第一连接部2411以及第二连接部2412，第二连接部2412用于与第二转接件242连接，而第一连接部2411用于与电极端子232连接，进而通过转接组件24实现电极组件22与电极端子232之间的连接需求。并且，电池单体20在成型时，可以将转接组件24的第二转接件242与电极组件22连接后将电极组件22与转接组件24整体装入壳体21内，然后将电极端子232与第一连接部2411连接，再使得第一连接部2411相对第二连接部2412折弯设置，利于端盖组件23封闭壳体21的开口211并与壳体21连接，避免转接组件24与电极端子232连接后端盖组件23无法装配至壳体21问题的发生，降低组装难度，提高电池单体20的成品率。
在一些可选地实施例中，第一转接件241的强度小于第二转接件242的强度。
可选地，第一转接件241与第二转接件242可以采用相同的材料制成，通过使得第一转接件241的厚度尺寸小于第二转接件242的厚度尺寸，以实现第一转接件 241的强度小于第二转接件242的强度需求。可选地，第一转接件241以及第二转接件242可以均采用铜材质，当然也可以均采用铝材质，上述铜、铝材质只是为了便于理解进行举例说明，不限于上述材质，只要能够满足第一转接件241与第二转接件242之间的强度要求均可。
可选地，第一转接件241以及第二转接件242也可以采用不同的材料制成，例如第一转接件241可以采用强度较低的金属材料，而第二转接件242采用强度较高的金属材料，通过上述设置，同样能够满足第一转接件241的强度小于第二转接件242的强度要求。
本申请实施例提供的电池单体20，通过使得第一转接件241的强度小于第二转接件242的强度，利于降低端盖组件23与第一连接部2411连接后向壳体21的开口211位置移动并封闭开口211时，第一连接部2411相对第二连接部2412的折弯难度，利于端盖组件23的装配，降低装配难度。
请参阅图6以及图7所示，在一些可选地实施例中，第一转接件241具有多层层叠设置并彼此电连接的转接层241a。
可选地，第一转接件241可以包括两层、三层甚至更多层转接层241a，多层转接层241a依次层叠后折弯设置，以此形成第一连接部2411以及第二连接部2412。也就是说，每层转接层241a的一部分用于形成第一连接部2411，且一部分用于形成第二连接部2412。
可选地，转接层241a可以采用金属箔，例如可以采用铜箔、铝箔等。
本申请实施例提供的电池单体20，通过使得第一转接件241具有多层层叠设置并彼此电连接的转接层241a。当第一连接部2411相对第二连接部2412折弯设置时，该种设置方式能够降低折弯难度，利于端盖组件23至壳体21的装配。
继续参阅图3至图7所示，在一些可选地实施例中，壳体21包括第一壁212，第一壁212与端盖组件23连接，电极组件22的第一端面222朝向第一壁212，第一端面222设置有极耳221。
可选地，壳体21可以呈方壳状，壳体21包括相对的第一壁212、第二壁213、第三壁214以及第四壁215，第一壁212以及第二壁213间隔且相对设置，第三壁214与第四壁215间隔且相对设置，第三壁214连接于第一壁212以及第二壁213，第四壁215连接于第一壁212以及第二壁213。第一壁212、第二壁213、第三壁214以及第四壁215共同围合形成有开口211.
可选地，第一端面222设置的极耳221可以是一个，当然也可以是两个，当 为两个时，两个极耳221极性相反且在第一端面222上间隔设置。
本申请实施例提供的电池单体，通过上述设置，利于极耳221的引出，同时能够便于极耳221通过转接组件24与电极端子连接。
在一些可选地实施例中，第一端面222和第一壁212沿第一方向Y排列，第一连接部2411连接于第二连接部2412沿第一方向Y的一侧。
可选地，第一方向Y可选为壳体21的高度方向。
可选地，第一连接部2411可以连接于第二连接部2412沿第一方向Y上靠近极耳221的一侧。或者说第一连接部2411可以连接于第二连接部2412沿第一方向Y上靠近第一壁212的一侧。
可选地，第一连接部2411可以沿着第一方向Y相对第二连接部2412折弯设置。
本申请实施例提供的电池单体，通过上述设置，使得当第一连接部2411与电极端子232连接后，端盖组件23整体可以在第一方向上翻转，使得第一连接部2411能够相对第二连接部2412折弯并使得端盖组件23可靠的扣接在开口211处，以与壳体21连接。
可以理解的是，将第一连接部2411连接于第二连接部2412沿第一方向Y的一侧只是一种可选地示例，但不限于上述方式。
请参阅图8所示，在一些可选地实施例中，第一端面222和第一壁212沿第一方向Y排列，壳体21在第二方向X具有开口211，第一连接部2411连接于第二连接部2412在第三方向Z的一侧，第三方向Z、第二方向X与第一方向Y两两垂直。
可选地，壳体21在第二方向X具有的开口211可以为一个，当然也可以为两个，可选为两个。
可选地，第二连接部2412在第三方向Z上具有相对的两侧，第一连接部2411连接于第二连接部2412在第三方向Z的任意一侧。
可选地，第一连接部2411可以在第三方向Z相对于第二连接部2412折弯设置。
可选地，第二方向Y可选为壳体21的长度方向，第三方向Z可选为壳体21的宽度方向。
本申请实施例提供的电池单体20，通过上述设置，使得当第一连接部2411与电极端子232连接后，端盖组件23整体可以在第三方向Z上翻转，使得第一连接部2411能够相对第二连接部2412折弯并使得端盖组件23可靠的扣接在开口211处，以 与壳体21连接。
本申请实施例提供的电池单体20，第一连接部2411以及第二连接部2412为一体式结构。
可选地，第一连接部2411以及第二连接部2412为一体式结构可以理解为二者为一个整体，可同步成型。
可选地，第一连接部2411以及第二连接部2412可以采用注塑的方式成型，当然第一连接部2411以及第二连接部2412可以通过一体式板状结构折弯形成。
可选地，当第一转接件241具有多层层叠设置并彼此电连接的转接层241a时，每层转接层241a的一部分用于形成第一连接部2411，且一部分用于形成第二连接部2412。多层转接层241a先依次层叠后再折弯设置，以此形成一体式的第一连接部2411以及第二连接部2412。
本申请实施例提供的电池单体20，通过使得第一连接部2411以及第二连接部2412为一体式结构，通过保证第一连接部2411以及第二连接部2412连接的可靠性，进而使得保证电极组件22与电极端子232电连接的稳定性。并且，通过使得第一连接部2411以及第二连接部2412为一体式结构，利于第一转接件241的成型。
请参阅图9所示，在一些可选地实施例中，第二转接件242包括第三连接部2421以及第四连接部2422，第三连接部2421与极耳221连接，第四连接部2422与第一转接件241连接。
可选地，第三连接部2421以及第四连接部2422分别可以呈片状结构体，第三连接部2421以及第四连接部2422可以相交设置，可选可以相互垂直设置。
可选地，第四连接部2422可以设置于第三连接部2421的一端，第二转接件242整体呈“L”状。
可选地，极耳221可以在第一方向Y与第三连接部2421层叠并与第三连接部2421连接。可选可以采用激光焊接等方式相互连接。
可选地，第四连接部2422可以与第二连接部2412层叠并相互连接，可选可以采用激光焊接等方式相互连接。
本申请实施例提供的电池单体20，通过使得第二转接件242包括第三连接部2421以及第四连接部2422，并限定第三连接部2421与极耳221连接，第四连接部2422与第一转接件241连接，能够保证第二转接件242与极耳221以及第一转接件241之间的电连接需求。
在一些可选地实施例中，第三连接部2421以及第四连接部2422为一体式结 构。
可选地，第三连接部2421以及第四连接部2422可以采用注塑的方式成型，当然第三连接部2421以及第四连接部2422可以通过一体式板状结构折弯形成。
本申请实施例提供的电池单体20，通过使得第三连接部2421以及第四连接部2422为一体式结构，能够保证第三连接部2421以及第四连接部2422连接的可靠性，进而使得保证电极组件22与电极端子232连接的稳定性。并且，通过使得第三连接部2421以及第四连接部2422为一体式结构，利于第二转接件242的成型。
在一些可选地实施例中，第一转接件241与第二转接件242为分体结构，第一转接件241以及第二转接件242至少部分层叠设置。
可选地，第一转接件241与第二转接件242可以各自分体成型后通过激光焊接等方式相互连接。
可选地，可以使得第一转接件241的第二连接部2412以及与第二转接件242的第四连接部2422层叠设置并相互连接。可选可以通过激光焊接的方式相互连接。
可选地，第一转接件241整体可以设置于第三连接部2421背离第四连接部2422的表面。
本申请实施例提供的电池单体20，通过使得第一转接件241与第二转接件242为分体结构，第一转接件241以及第二转接件242至少部分层叠设置，既能够保证第一转接件241以及第二转接件242之间的电连接需求。同时，该种设置形式能够简化第一转接件241以及第二转接件242的成型方式，尤其当第一转接件241与第二转接件242采用不同材料时的成型。并且，通过使得第一转接件241以及第二转接件242至少部分层叠设置，能够增加第一转接件241与第二转接件242之间的连接面积，保证二者分体设置时的连接强度。
可以理解的是，第一转接件241与第二转接件242为分体式结构只是一种可选地实施方式，但不限于上述方式。
在有些实施例中，还可以使得第一转接件241以及第二转接件242为一体式结构。
可选地，当第一转接件241与第二转接件242为一体式结构时，可以使得第一转接件241以及第二转接件242中的一者为L形且另一者呈平板状。
本申请实施例提供的电池单体20，当第一转接件241与第二转接件242采用一体式结构时，能够省去二者激光焊接等连接工序，且能够保证第一转接件241以 及第二转接件242之间的连接强度。
继续参阅图8以及图9所示，在一些可选地实施例中，第二转接件242上设置有让位空间2423，极耳221至少部分位于让位空间2423并与第二转接件242连接。
可选地，让位空间2423可以通过在第二转接件242上去除部分材料后形成的缺口形式。
可选地，让位空间2423用于避让极耳221，使得极耳221可以穿过让位空间2423后折叠并覆盖在第二转接件242朝向壳体21的表面上，保证与第二转接件242之间的电连接需求。
可选地，让位空间2423可以是呈闭环的通槽形式，当然，让位空间2423也可以是在具有开口211的非闭环的通槽形式。
本申请实施例提供的电池单体20，通过在第二转接件242上设置让位空间2423，能够对极耳221进行避让，使得极耳221可通过让位空间2423后回折与第二转接件242连接。该方案能够对极耳221进行整形，防止极耳221插入电极组件22内。
在一些实施例中，第二转接件242沿电极组件22的厚度方向的至少一侧设置有让位空间2423。
可选地，可以使得第二转接件242在电极组件22的厚度方向的一侧设置让位空间2423，也可以使得壳体21在电极组件22的厚度方向的两侧均设置让位空间2423，具体可以根据极耳的引出方式设置，让位空间2423可以由第二转接件242在电极组件22的厚度方向的端面起始沿厚度方向凹陷形成。
可选地，当第二转接件242包括第三连接部2421以及第四连接部2422时，让位空间2423可以成型于第三连接部2421。
可选地，电极组件22的厚度方向可选为图示中的第三方向Z。
本申请实施例提供的电池单体20，通过使得第二转接件242沿第三方向Z的至少一侧设置有让位空间2423，使得极耳221位于电极组件22在第一方向Y的一端时利于极耳221与第二转接件242的配合，保证极耳221与第二转接件242之间的连接的可靠性。
请参阅图10所示，在一些可选地实施例中，极耳221与第二转接件242之间设置有绝缘膜层25，绝缘膜层25用于防护极耳221。
可选地，在第三方向Z上，第二转接件242围合形成让位空间2423的壁面朝向极耳221的一侧覆盖有绝缘膜层25，以绝缘膜层25用于防护极耳221。
本申请实施例提供的电池单体20，通过设置绝缘膜层25，能够对极耳221 进行防护，避免极耳221被第二转接件242形成让位空间2423的壁面磨损。
请参阅图11至图13所示，在一些可选地实施例中，电池单体20还包括绝缘件233，绝缘件233设置于端盖组件23朝向电极组件22的一侧，绝缘件233朝向表面包括第一区2331，第一区2331与转接组件24相对设置并与电极端子232朝向转接组件24的表面至少部分平齐设置。
可选地，绝缘件233用于使得端盖231与电极端子232绝缘设置。
可选地，第一区2331可以在壳体21的第二方向X与转接组件24相对设置，第一区2331在第二方向X上的正投影可以覆盖部分或者全部转接组件24。
本申请实施例提供的电池单体20，通过使得绝缘件233朝向表面包括第一区2331，第一区2331与转接组件24相对设置并与电极端子232朝向转接组件24的表面至少部分平齐设置，当电极端子232与转接组件24的第一转接件241连接后，通过折弯第一转接件241，使得第一连接部2411相对于第二连接部2412折弯的过程中，绝缘件233不会与转接组件24发生干涉，保证端盖组件23整体可以封闭壳体21的开口211设置并与壳体21连接。
在一些可选地实施例中，壳体21在第二方向X的两端分别形成有开口211，每个开口211封闭设置有端盖组件23，至少一个端盖组件23的电极端子232通过转接组件24与极耳221连接。
可选地，当壳体21在第二方向X的两端分别形成开口211后，可以使得两个开口211处的端盖组件23中一者通过上述各实施例提及的转接组件24与极耳221连接，当然，也可以使得两个开口211处的端盖组件23均通过上述各实施例提及的转接组件24与极耳221连接。
本申请实施例提供的电池单体20，当壳体21在第二方向X的两端分别形成有开口211并使得至少一个端盖组件23的电极端子232通过转接组件24与极耳221连接，使得电池单体20在成组时，利于电池单体20的装配。
第二方面，本申请提供了一种电池，包括箱体以及上述的电池单体20，电池单体20容纳于箱体内。
第三方面，本申请提供了一种用电装置，包括上述的电池单体20，电池单体20用于提供电能。
请参阅图14至图20所示，第四方面，本申请提供了一种电池单体20的组装方法，该组装方法可以用于成型上述各实施例提供的电池单体20，组装方法包括：
S100、提供壳体21、电极组件22、端盖组件23以及转接组件24，壳体21 具有开口211，电极组件22包括极耳221，端盖组件23包括电极端子232，转接组件24包括相连接的第一转接件241以及第二转接件242，第一转接件241包括第一连接部2411以及第二连接部2412，第二连接部2412用于与第二转接件242连接，第一连接部2411能够相对第二连接部2412折弯设置。
S200、将第二转接件242与极耳221连接。
S300、将电极组件22放入壳体21内；
S400、将第一转接件241的第一连接部2411与电极端子232连接；
S500、将第一连接部2411相对第二转接件242折弯设置，以使得转接组件24整体位于壳体21内，且端盖组件23封闭开口211并与壳体21连接。
可选地，在步骤S100中，提供的壳体21、电极组件22、端盖组件23以及转接组件24彼此分离设置，转接组件24的第一转接件241以及第二转接件242相互连接，同时，第一连接部2411以及第二连接部2412可以在同一平在面呈展平状态，当然，第一连接部2411以及第二连接部2412也可以相交设置。
可选地，在步骤S100中，提供的壳体21可以具有一个开口211，当然，也可以具有两个开口211，当具有两个开口211时，两个开口211在第二方向X相对设置。
可选地，在步骤S200中，第二转接件242与极耳221之间可以采用激光焊接等方式相互连接。可选地，当第二转接件242包括让位空间2423时，极耳221可以在第一方向Y穿过让位空间2423后回折并层叠在第二转接件242上并与第二转接件242焊接连接。
可选地，在步骤S300中，将电极组件22放入壳体21内，可以使得电极组件22及其所连接的转接组件24由壳体21的一侧开口211伸入壳体21的内部。
可选地，在步骤S400中，将第一转接件241的第一连接部2411与电极端子232连接，可以使得第一连接部2411与电极端子232采用激光焊接等方式相互连接。
可选地，在步骤S500中，当第一连接部2411连接于第二连接部2412在第一方向Y的一侧时，可以使得第一连接部2411在第一方向Y上翻转并相对于第二连接部2412折弯。而当第一连接部2411连接于第二连接部2412在第三方向Z的一侧时，可以使得第一连接部2411在第三方向Z上翻转并相对于第二连接部2412折弯。
本申请实施例提供的电池单体20的组装方法，通过提供转接组件24，限定转接组件24包括相连接的第一转接件241以及第二转接件242，第一转接件241包括第一连接部2411以及第二连接部2412，第二连接部2412用于与第二转接件242连 接，第一连接部2411能够相对第二连接部2412折弯设置，并且，先将转接组件24的第二转接件242与极耳221连接后再将整体放置于壳体21内，然后将第一转接件241的第一连接部2411与电极端子232连接，由于第一连接部2411能够相对第二连接部2412折弯设置，在执行S500时，能够将第一连接部2411至少部分相对第二转接件242折弯，以使得转接组件24整体位于壳体21内，且端盖组件23封闭开口211并与壳体21连接，能够降低端盖组件23的安装难度。
在一些可选地实施例中，本申请实施例提供的电池单体20的组装方法，壳体21在第二方向X的两端分别形成有开口211，端盖组件23的数量为两个，在步骤S300之前，方法还包括：将电极组件22的另一个极耳221与两个端盖组件23中的一者连接。
可选地，将电极组件22的另一个极耳221与两个端盖组件23中的一者连接的步骤中，该极耳221与端盖组件23之间可以通过转接结构进行连接，该转接结构可以为上述各实施例提供的转接组件24的结构形式，当然也可以采用普通的呈转接片的形式，只要能够保证极耳221与端盖组件23之间的电连接要求均可。
本申请实施例提供的电池单体20的组装方法，在步骤S300，先将另一个极耳221与两个端盖组件23中的一者连接，在壳体21外进行连接，操作简单，且能够保证连接质量，并且连接后也不会对电极组件22装入壳体21内进行干涉。
在一些可选地实施例中，本申请实施例提供的电池单体20的组装方法，在步骤S300之后且步骤S400之前，组装方法还包括：将另一个与极耳221连接的端盖组件23封闭另一个开口211设置并与所述壳体21连接。
本申请实施例提供的电池单体20的组装方法，通过上述设置，可以先将其中一个端盖组件23与壳体21的位置固定，然后进行另一端盖组件23的安装，提高安装效率，同时能够避免两个端盖组件23均处于未固定状态下影响端盖组件23与转接组件24的连接。
在一些可选地实施例中，在步骤S300之前并在步骤S200之后，所述方法还包括在电极组件22上包覆保护膜层26，以使得电极组件24在装入壳体21后与壳体21之间绝缘设置。
本申请实施例提供的电池单体的组装方法，通过设置保护膜层26，能够使得电极组件24在装入壳体21后与壳体21之间绝缘设置，提高所成型电池单体20的安全性能。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限 制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (21)

  1. 一种电池单体，包括：
    壳体，具有开口；
    电极组件，设于所述壳体内，所述电极组件包括极耳；
    端盖组件，用于封闭所述开口，所述端盖组件包括电极端子；
    转接组件，包括相连接的第一转接件以及第二转接件，所述第二转接件用于与所述极耳连接；
    其中，所述第一转接件包括第一连接部以及第二连接部，所述第一连接部用于与所述电极端子连接，所述第二连接部用于与所述第二转接件连接，所述第一连接部能够相对所述第二连接部折弯设置。
  2. 根据权利要求1所述的电池单体，其中，所述第一转接件的强度小于所述第二转接件的强度。
  3. 根据权利要求1或2所述的电池单体，其中，所述第一转接件具有多层层叠设置并彼此电连接的转接层。
  4. 根据权利要求1至3任意一项所述的电池单体，其中，所述壳体包括第一壁，所述第一壁与所述端盖组件连接，所述电极组件的第一端面朝向所述第一壁，所述第一端面设置有所述极耳。
  5. 根据权利要求4所述的电池单体，其中，所述第一端面和所述第一壁沿第一方向排列，所述第一连接部连接于所述第二连接部沿所述第一方向的一侧。
  6. 根据权利要求4所述的电池单体，其中，所述第一端面和所述第一壁沿第一方向排列，所述壳体在所述第二方向具有所述开口，所述第一连接部连接于所述第二连接部在所述第三方向的一侧，所述第三方向、所述第二方向与所述第一方向两两垂直。
  7. 根据权利要求1至6任意一项所述的电池单体，其中，所述第一连接部以及所述第二连接部为一体式结构。
  8. 根据权利要求1至7任意一项所述的电池单体，其中，所述第二转接件包括第三连接部以及第四连接部，所述第三连接部与所述极耳连接，所述第四连接部与所述第一转接件连接。
  9. 根据权利要求8所述的电池单体，其中，所述第三连接部以及所述第四连接部为一体式结构。
  10. 根据权利要求1至9任意一项所述的电池单体，其中，第一转接件与第二转接 件为分体结构，所述第一转接件以及所述第二转接件至少部分层叠设置。
  11. 根据权利要求1至9任意一项所述的电池单体，其中，所述第一转接件以及所述第二转接件为一体式结构。
  12. 根据权利要求1至11任意一项所述的电池单体，其中，所述第二转接件上设置有让位空间，所述极耳至少部分位于所述让位空间并与所述第二转接件连接。
  13. 根据权利要求12所述的电池单体，其中，所述第二转接件沿所述电极组件的厚度方向的至少一侧设置有所述让位空间。
  14. 根据权利要求11所述的电池单体，其中，所述极耳与所述第二转接件之间设置有绝缘膜层，所述绝缘膜层用于防护所述极耳。
  15. 根据权利要求1至14任意一项所述的电池单体，其中，所述电池单体还包括绝缘件，所述绝缘件设置于所述端盖组件朝向所述电极组件的一侧，所述绝缘件朝向所述转接组件的表面包括第一区，所述第一区与所述转接组件相对设置并与所述电极端子朝向所述转接组件的表面至少部分平齐设置。
  16. 根据权利要求1至15任意一项所述的电池单体，其中，所述壳体在第二方向的两端分别形成有开口，每个所述开口封闭设置有所述端盖组件，至少一个所述端盖组件的所述电极端子通过所述转接组件与所述极耳连接。
  17. 一种电池，包括箱体以及多个如权利要求1至16任意一项所述的电池单体，所述电池单体容纳于所述箱体内。
  18. 一种用电装置，包括：如权利要求1至16任意一项所述的电池单体，所述电池单体用于提供电能。
  19. 一种电池单体的组装方法，包括：
    提供壳体、电极组件、端盖组件以及转接组件，所述壳体具有开口，所述电极组件包括极耳，所述端盖组件包括电极端子，所述转接组件包括相连接的第一转接件以及第二转接件，所述第一转接件包括第一连接部以及第二连接部，所述第二连接部用于与所述第二转接件连接，所述第一连接部能够相对所述第二连接部折弯设置；
    将所述第二转接件与所述极耳连接；
    将所述电极组件放入所述壳体内；
    将所述第一转接件的所述第一连接部与所述电极端子连接；
    将所述第一连接部相对所述第二转接件折弯设置，以使得所述转接组件整体位于所述壳体内，且所述端盖组件封闭所述开口并与所述壳体连接。
  20. 根据权利要求19所述的组装方法，其中，所述壳体在第二方向的两端分别形成 有所述开口，所述端盖组件的数量为两个，在所述将所述电极组件放入所述壳体内的步骤之前，所述组装方法还包括：
    将所述电极组件的另一个所述极耳与两个所述端盖组件中的一者连接。
  21. 根据权利要求20所述的组装方法，其中，所述将所述电极组件放入所述壳体内的步骤之后且在所述将所述第一转接件的所述第一连接部与所述电极端子连接的步骤之前，所述组装方法还包括：
    将与另一个所述极耳连接的所述端盖组件封闭另一个所述开口设置并与所述壳体连接。
PCT/CN2022/104144 2022-07-06 2022-07-06 电池单体及其组装方法、电池、用电装置 WO2024007194A1 (zh)

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