WO2023092450A1 - 电池单体及其制造方法和装置、电池、用电装置 - Google Patents

电池单体及其制造方法和装置、电池、用电装置 Download PDF

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Publication number
WO2023092450A1
WO2023092450A1 PCT/CN2021/133477 CN2021133477W WO2023092450A1 WO 2023092450 A1 WO2023092450 A1 WO 2023092450A1 CN 2021133477 W CN2021133477 W CN 2021133477W WO 2023092450 A1 WO2023092450 A1 WO 2023092450A1
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WIPO (PCT)
Prior art keywords
tab
pole piece
winding
battery cell
conductive region
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PCT/CN2021/133477
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English (en)
French (fr)
Inventor
许虎
黄思应
赵丰刚
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 CN202180089074.5A priority Critical patent/CN116686159A/zh
Priority to PCT/CN2021/133477 priority patent/WO2023092450A1/zh
Priority to EP21965184.1A priority patent/EP4333193A1/en
Publication of WO2023092450A1 publication Critical patent/WO2023092450A1/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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of batteries, in particular to a battery cell, a manufacturing method and equipment thereof, a battery, and an electrical device.
  • batteries such as lithium-ion have the advantages of high energy density, high power density, many cycle times, and long storage time, they have been widely used in electric vehicles.
  • the purpose of this application is to improve the performance of the battery.
  • a battery cell including:
  • a housing having an opening
  • An end cap assembly used to close the opening, the end cap assembly includes an end cap body and an electrode terminal arranged on the end cap body;
  • the electrode assembly is arranged in the casing and includes: a first pole piece and a second pole piece with opposite polarities, the first pole piece includes a first main body part and a first pole ear protruding from the first main body part, and the second pole piece
  • the sheet includes a second body portion and a second lug protruding from the second body portion, the first pole piece and the second pole piece are configured to be wound around a winding axis such that the first body portion and the second body portion superimposed to form a winding body; one end of the winding body includes a first conductive area and a second conductive area, the first tab is drawn out from the first conductive area, the second tab is drawn out from the second conductive area, and the adjacent second tab is drawn out from the second conductive area.
  • a conductive region and a second conductive region are arranged at intervals along the radial direction of the winding body;
  • first tab is electrically connected to the electrode terminal
  • second tab is electrically connected to the end cap body
  • the first tab and the second tab are led out from the same end of the winding body, only one end of the electrode assembly needs to be reserved for electrical connection space, and it is also omitted to set up electrode terminals at both ends of the battery cell. , can effectively increase the overall energy density of the battery cell, and can reduce the volume of the battery cell when the capacity of the battery cell is constant, making it easier for the battery to be laid out in the electrical device.
  • this battery cell is provided with only one electrode terminal, the first tab is electrically connected to the electrode terminal, and the second tab is directly electrically connected to the end cap body, which can simplify the structure and assembly process of the battery cell.
  • one electrode terminal By omitting one electrode terminal, a large space can be left on the end cap body, and it is easy to arrange liquid injection parts and pressure relief parts on the end cap body, and it is also convenient for arranging temperature collection parts, confluence parts between battery cells and various It is also beneficial to increase the cross-sectional area of the electrode terminal to increase the overcurrent capacity of the battery cell. When the area of the end cap body is small, this design has greater advantages.
  • first tab and the second tab are arranged at intervals in the radial direction, which is beneficial to increase the extension size of the first tab and the second tab along the circumferential direction of the winding body, and improve the connection strength between the tab and the winding body.
  • make the root of the tab have a better self-supporting effect, reduce the wrinkling phenomenon of the tab during the process of applying a circumferential force to the tab, stabilize the shape of the flattened area, and optimize the first tab and the electrode terminal.
  • the electrical connection effect between the second tab and the end cap body ensures that the electrode assembly reliably transmits electric energy to the outside and improves the overcurrent capability.
  • the first conductive region is located radially inward of the second conductive region.
  • This embodiment can make the first tab lead out from the middle area of the winding body, so that the electrode terminal is located near the middle area of the end cap body, leaving the surrounding area for the layout of the liquid injection part and the pressure relief part, and also for the arrangement of the temperature. It is also beneficial to increase the cross-sectional area of the electrode terminals to increase the overcurrent capacity of the battery cells by leaving sufficient space for the collection components, the confluence parts between the battery cells, and various wires.
  • the first conductive region is located radially outside the second conductive region.
  • the surface of the electrode terminal away from the electrode assembly is provided with a first groove, the first groove is concave toward the direction close to the electrode assembly, and a second groove is formed between the bottom surface of the first groove and the surface of the electrode terminal close to the electrode assembly.
  • a welding part, the first tab is welded to the first welding part.
  • the thickness of the electrode terminal in the welding area is reduced, and after the end cover assembly is installed in the housing, welding can be performed directly from the outside of the electrode terminal, which simplifies the assembly process, and The firmness of welding can be improved to reliably realize the electrical connection between the electrode terminal and the first tab.
  • the surface of the end cap body away from the electrode assembly is provided with a second groove, the second groove is concave toward the direction close to the electrode assembly, and the bottom surface of the second groove is between the surface of the end cap body close to the electrode assembly A second welding portion is formed between them, and the second tab is welded to the second welding portion.
  • the thickness of the end cap body in the welding area is reduced by providing a second groove on the end cap body, so that after the end cap assembly is installed in the housing, welding can be performed directly from the outside of the end cap body, which simplifies assembly process, and can improve the firmness of welding, so as to reliably realize the electrical connection between the end cap body and the second tab.
  • a plurality of second grooves are arranged at intervals along the circumferential direction on the end cover body, which can not only improve the reliability of the electrical connection between the second tab and the end cover body, for example, when the electrical connection is realized by welding, multiple grooves are set.
  • the first welding position can ensure the welding strength and prevent the welding position from loosening when the battery is subjected to vibration and impact during use; moreover, other components such as liquid injection parts and pressure relief parts can be arranged between two adjacent second grooves , make full use of the space on the end cover body.
  • the battery cell further includes an adapter, through which the first tab is electrically connected to the electrode terminal, and/or the second tab is electrically connected to the end cap body through the adapter.
  • the requirements for the positional relationship between the first tab and the electrode terminal, as well as the positional relationship between the second tab and the end cap body can be reduced by providing the adapter, thereby reducing the difficulty of the electrical connection process;
  • Each lug is relatively fluffy, and it is easier to improve the connection reliability through the adapter to increase the overcurrent capacity of the inner and outer ring lugs.
  • the welding track of the adapter and the lug can be control, which can improve the firmness of welding; in addition, it can also prevent damage to the tab or the winding body during electrical connection, for example, when welding is used, it can prevent the welding energy from burning the tab, deforming the winding body or The coating layer on the first main body part and the second main body part falls off.
  • the first tab is wound at least one full turn, and/or the second tab is wound at least one full turn.
  • the tab is continuously extended and wound at least one turn, and has a better connection strength with the winding body in the circumferential direction, so that the root of the tab has a better self-supporting effect, and when the circumferential force is applied to the tab During the flattening process, prevent the tabs from wrinkling, stabilize the shape of the flattened area, optimize the welding effect between the first tab and the electrode terminal, and the second tab and the end cap body, and ensure the reliable outward transmission of the electrode assembly power and improve the over-current capability.
  • the particles generated during tab welding are not easy to fall between the first pole piece and the second pole piece in the liquid guide area along the circumference, which can improve the reliability of the electrode assembly and prevent short circuit or pole piece scratches. problem of injury.
  • first tab and the second tab can be satisfied.
  • the flow capacity of the dipole lug does not need to set discrete lugs on the entire winding length of the main body, which can simplify the die-cutting pole piece process.
  • first pole piece and the second pole piece are wound to form the winding body, There is also no need for tab alignment, which simplifies the process and improves the production efficiency of the electrode assembly.
  • the first tab is wound multiple times in the first conductive region, and/or the second tab is wound multiple times in the second conductive region.
  • the tabs are wound multiple times in the conductive area, and the bending parts of two adjacent tab layers in the tabs are overlapped after kneading, so as to further strengthen the supporting effect of the tabs and prevent the tabs from rubbing. Wrinkle flat to stabilize the shape of the bent part and optimize the welding effect between the first tab and the electrode terminal as well as between the second tab and the end cap body. Moreover, the welding area between the lug and the electrode terminal or the end cap body after being flattened can also be increased, so that the welding between the first lug and the electrode terminal and the second lug and the end cap body are firmer, ensuring that the electrode assembly is reliable.
  • the ground transmits electric energy to the outside and improves the over-current capability.
  • the first pole piece is provided with a plurality of first tabs at intervals along the winding direction, the plurality of first tabs form at least one first tab group, at least one first conductive region is provided, and the first pole The ear group is arranged corresponding to the first conductive region, the first ear group extends along a part of the winding body, and includes a plurality of first ear ears stacked in a radial direction; and/or
  • the second pole piece is provided with a plurality of second tabs at intervals along the winding direction, and the plurality of second tabs form at least one second tab group, at least one second conductive region is provided, and the second tab group and the second conductive The regions are arranged correspondingly, and the second tab group extends along a part of the winding body in the circumferential direction, and includes a plurality of second tabs stacked in the radial direction.
  • the tab lead-out method of this embodiment can reduce the weight of the electrode assembly on the basis of ensuring the current transmission capability, thereby reducing the weight of the battery cell.
  • the end of the wound body further includes at least one liquid conducting area, wherein one of the liquid conducting areas is located between the adjacent first conductive area and the second conductive area along the radial direction of the wound main body, for Electrolyte is guided to flow into the inside of the wound body.
  • the first tab and the second tab can be separated in space to play an insulating role, and the electrolysis can also be achieved.
  • the liquid infiltrates from the liquid guide area to the inside of the winding body to ensure the wetting performance of the electrode assembly and improve the liquid absorption effect, so that the electrolyte and the active materials on the first pole piece and the second pole piece The reaction takes place sufficiently to optimize the performance of the battery cell.
  • the end of the winding body has a plurality of first conductive areas spaced along the radial direction, and a liquid conducting area is provided between adjacent first conductive areas; and/or Or the end of the winding body has a plurality of second conductive areas arranged at intervals along the radial direction, and a liquid conducting area is provided between adjacent second conductive areas.
  • the liquid-conducting area between the adjacent first conductive area and the second conductive area, the liquid-conducting area between the adjacent first conductive areas, and the liquid-conducting area between the adjacent second conductive areas enter the inside of the winding body, so as to During the charging and discharging process of the battery, the distribution of the electrolyte in the radial direction inside the winding body is more uniform, so that the electrolyte can fully react with the active materials on the first pole piece and the second pole piece, thereby optimizing the battery cell body performance.
  • the electrode assembly further includes a diaphragm, the diaphragm is used to isolate the first pole piece and the second pole piece, and the diaphragm, the first body part and the second body part are wound to form a winding body; In the direction of extension, the part of the diaphragm located in the liquid guiding area exceeds the sides of the first main body part and the second main body part.
  • the diaphragm is widened in the liquid-conducting area, so that the sides of the diaphragm can protrude outward between the first pole piece and the second pole piece in the liquid-conducting area, and be soaked in the electrolyte, thereby making the diaphragm more It is easy to absorb the electrolyte under capillary action, which improves the wetting performance of the electrode assembly, thereby improving the performance of the battery cell.
  • the battery cell further includes a first insulator, and at least part of the first insulator is disposed between adjacent first and second conductive regions along the radial direction of the winding body.
  • This embodiment can separate the first tab and the second tab through the first insulating member, so as to prevent the contact short circuit between the first tab and the second tab due to vibration or impact, and improve the reliability of the battery cell. sex.
  • a battery including: the battery cell of the above embodiment and a box body, where the box body is used to accommodate the battery cell.
  • an electric device including the battery of the above embodiment, and the battery is used to provide electric energy for the electric device.
  • a method for manufacturing a battery cell including:
  • Step of providing components providing a casing, an end cap assembly, and a first pole piece and a second pole piece with opposite polarities; wherein, the casing has an opening, and the end cap assembly includes an end cap body and an electrode terminal provided on the end cap body , the first pole piece includes a first body portion and a first tab protruding from the first body portion, and the second pole piece includes a second body portion and a second tab protruding from the second body portion;
  • Pole piece winding step winding the first pole piece and the second pole piece around the winding axis, so that the first main body part and the second main body part are superimposed to form a winding body, and one end of the winding body includes a first The conductive area and the second conductive area; the first tab is drawn out from the first conductive area, the second tab is drawn out from the second conductive area, and the adjacent first conductive area and second conductive area are spaced along the radial direction of the winding body set up;
  • the end cover installation step close the opening of the end cover assembly, electrically connect the first tab to the electrode terminal, and electrically connect the second tab to the end cover body.
  • a battery cell manufacturing device including:
  • a component providing device configured to provide a casing, an end cap assembly, and a first pole piece and a second pole piece with opposite polarities; wherein the casing has an opening, the end cap assembly includes an end cap body and is disposed on the end cap body
  • the first pole piece includes a first main body and a first tab protruding from the first main body
  • the second pole piece includes a second main body and a second tab protruding from the second main body;
  • a pole piece winding device configured to wind the first pole piece and the second pole piece around the winding axis so that the first body part and the second body part are superimposed and form a winding body, one end of the winding body It includes a first conductive area and a second conductive area; the first tab is drawn out from the first conductive area, the second tab is drawn out from the second conductive area, and the adjacent first conductive area and second conductive area are along the winding body radial spacing settings; and
  • the end cap installation device is configured to close the opening of the end cap assembly, electrically connect the first tab to the electrode terminal, and electrically connect the second tab to the end cap body.
  • FIG. 1 is a structural schematic diagram of some embodiments of the present application in which batteries are installed in vehicles.
  • Figure 2 is an exploded view of some embodiments of the battery of the present application.
  • FIG. 3 is a schematic structural diagram of some embodiments of battery cells of the present application.
  • FIG. 4 is an exploded view of some embodiments of battery cells of the present application.
  • Fig. 5 is a schematic diagram of the end structure of some embodiments of the electrode assembly.
  • FIG. 6 is an expanded view of the electrode assembly shown in FIG. 5 .
  • FIG. 7 is a top view of some embodiments of battery cells of the present application.
  • Fig. 8 is a cross-sectional view A-A of the first embodiment of the battery cell shown in Fig. 7 .
  • FIG. 9 is an A-A sectional view of the second embodiment of the battery cell shown in FIG. 7 .
  • Fig. 10 is a cross-sectional view A-A of the third embodiment of the battery cell shown in Fig. 7 .
  • Fig. 11 is an A-A sectional view of the fourth embodiment of the battery cell shown in Fig. 7 .
  • Fig. 12 is an A-A sectional view of the fifth embodiment of the battery cell shown in Fig. 7 .
  • Fig. 13 is a schematic diagram of end structures of other embodiments of electrode assemblies.
  • FIG. 14 is a schematic flowchart of some embodiments of the battery cell manufacturing method of the present application.
  • Fig. 15 is a schematic diagram of the module composition of some embodiments of the battery cell manufacturing device of the present application.
  • Electrode assembly 1. The first pole piece; 11. The first main body; 12. The first tab; 12', the first tab set; 2. The second pole piece; 21. The second main body; 22 , the second tab; 22' the second tab group; 3, the diaphragm; 111, the liquid conducting area; 112, the first conducting area; 113, the second conducting area;
  • 100 battery cell; 101, shell; 1011, opening; 1012, recessed part; 1013, bending part; 102, end cover assembly; 1021, end cover body; 1021', second groove; 1021A, main body plate 1021B, protruding part; 1021C, through hole; 1022, electrode terminal; 1022', first groove; 1022A, first terminal part; 1022B, second terminal part; 1022C, second insulating part; ; 1024, pressure relief component; 103, insulating film; 104, adapter; 1041, first connecting part; 1042, second connecting part; 105; first insulating ring; 106, second insulating ring; 107, first Insulator; 108, central tube; 109, seal;
  • 200 battery; 201, box body; 201A, accommodating part; 201B, first cover body; 201C, second cover body;
  • S winding main body
  • K winding axis
  • W1 first welding part
  • W2 second welding part.
  • connection should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary.
  • connection should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary.
  • an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least some of the embodiments of the present application.
  • the occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • 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 this embodiment of the present application.
  • the battery cell can be in the shape 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.
  • a current battery cell generally includes a case and an electrode assembly accommodated in the case, and the case is filled with electrolyte.
  • the electrode assembly is mainly formed by stacking or winding a first pole piece and a second pole piece with opposite polarities, and a diaphragm is usually arranged between the first pole piece and the second pole piece.
  • the part of the first pole piece and the second pole piece coated with the active material constitutes the main body of the electrode assembly, and the part of the first pole piece and the second pole piece not coated with the active material constitutes the first tab and the second tab respectively.
  • the first pole piece can be a positive pole piece, including a positive current collector and a positive active material layer arranged on both sides of the positive current collector.
  • the material of the positive current collector can be aluminum, for example, and the positive active material can be, for example, Lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc.; the second pole piece can be a negative pole piece, including a negative electrode current collector and a negative electrode active material layer arranged on both sides of the negative electrode current collector, and the material of the negative electrode current collector
  • it may be copper
  • the negative electrode active material may be, for example, graphite or silicon.
  • the first tab and the second tab can be located at one end of the main body together or at two ends of the main body respectively. During the charge and discharge process of the battery cell, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the terminals to form a current loop.
  • the current battery cells are usually provided with a first electrode terminal and a second electrode terminal with opposite polarities, which are used to connect to the power circuit for power supply.
  • the first tab is electrically connected to the first electrode terminal
  • the second tab is electrically connected to the second
  • the two electrode terminals are electrically connected.
  • the second tab and the second electrode terminal are respectively arranged at both ends of the battery cell, correspondingly, the first tab and the second tab Lead out from both ends of the electrode assembly respectively.
  • the inventors thought of setting the first electrode terminal and the second electrode terminal on the same end of the battery cell, and correspondingly, the first tab and the second tab are separated from the same end of the electrode assembly. end lead out.
  • this setting method faces difficulties in the following two aspects.
  • the first electrode terminal and the second electrode terminal are located at the same end of the battery cell and need to be reliably insulated, and the first tab and the second tab drawn from the same end of the electrode assembly are also not Insulation issues need to be considered to improve the reliability of battery cells.
  • the inventors of the present application started from the idea of increasing the energy density of the battery cells and improving the space layout on the end caps, and improved the way the battery cells output electric energy.
  • the end cap assembly includes an end cap body and an electrode terminal, the electrode terminal is insulated and connected to the end cap body; the end of the winding body of the electrode assembly includes a first conductive area and a second conductive area, and the first tab is drawn out of , the second tab is drawn from the second conductive area, and the adjacent first conductive area and second conductive area are arranged at intervals along the radial direction of the winding body; wherein, the first tab is electrically connected to the terminal, and the second tab is connected to the terminal.
  • the end cap body is electrically connected.
  • the battery cells of the embodiments of the present application are applicable to batteries and electric devices using batteries.
  • Electric devices can be mobile phones, portable devices, notebook computers, battery cars, electric cars, ships, spacecraft, electric toys and electric tools, etc.
  • spacecraft include airplanes, rockets, space shuttles and spaceships, etc.
  • electric toys Including fixed 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, and electric planers.
  • the electrical device can be a vehicle 300, such as a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; or the electrical device can also be a drone or a ship, etc. .
  • the vehicle 300 may include an axle 301, a wheel 302 connected to the axle 301, a motor 303, a controller 304 and a battery 200, the motor 303 is used to drive the axle 301 to rotate, and the controller 304 is used to control the operation of the motor 303,
  • the battery 200 can be arranged at the bottom, head or tail of the vehicle 300 to provide electric energy for the operation of the motor 303 and other components in the vehicle.
  • the battery 200 includes a case 201 and a battery cell 100 .
  • the battery 200 there may be one or more battery cells 100 .
  • the multiple battery cells 100 can be connected in series, parallel or mixed. 100 are connected in series or in parallel or mixed to form a battery module, and then a plurality of battery modules are connected in series or in parallel or mixed to form a whole and accommodated in the box 201 . It may also be that all the battery cells 100 are directly connected in series, parallel or mixed together, and then the whole composed of all the battery cells 100 is housed in the case 201 .
  • the box body 201 is hollow inside and is used to accommodate one or more battery cells 100 . According to the shape, quantity, combination and other requirements of the battery cells 100 contained therein, the box body 201 may also have different shapes and sizes.
  • the box body 201 may include: an accommodating portion 201A, a first cover 201B and a second cover 201C, the opposite ends of the accommodating portion 201A have openings, and the first cover 201B and the second cover 201C are respectively used for closing Both ends of the accommodating portion 201A are open.
  • the accommodating portion 201A has a rectangular cylindrical structure.
  • the battery cell 100 may be, for example, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, or a magnesium-ion battery.
  • the battery cell 100 includes: a casing 101 , an end cap assembly 102 and an electrode assembly 10 .
  • the casing 101 has an opening 1011 , and the end cap assembly 102 is used to close the opening 1011 .
  • the end cap assembly 102 includes an end cap body 1021 and an electrode terminal 1022 insulatedly connected to the end cap body 1021 .
  • the electrode assembly 10 is arranged in the casing 101, as shown in Figure 5 and Figure 6, the electrode assembly 10 includes: a first pole piece 1 and a second pole piece 2 with opposite polarities, the first pole piece 1 includes a first main body 11 and the first tab 12 protruding from the first main body 11 , the second pole piece 2 includes a second main body 21 and a second tab 22 protruding from the second main body 21 .
  • the first pole piece 1 and the second pole piece 2 are configured to be wound around the winding axis K so that the first body part 11 and the second body part 21 are superimposed and form a winding body S; one end of the winding body S Including the first conductive area 112 and the second conductive area 113, the first tab 12 is drawn out in the first conductive area 112, the second tab 22 is drawn out in the second conductive area 113, the adjacent first conductive area 112 and the second
  • the conductive regions 113 are arranged at intervals along the radial direction of the winding body S. As shown in FIG. Wherein, the first tab 12 is electrically connected to the electrode terminal 1022 , and the second tab 22 is electrically connected to the end cap body 1021 .
  • the casing 101 is a hollow structure for accommodating the electrode assembly 10 , and the casing 101 has an opening 1011 , and the end cap body 1021 is used to cover the opening 1011 .
  • the end cap body 1021 is in the shape of a rectangular plate; for a cylindrical battery cell 100 , the end cap body 1021 is in a disc shape.
  • the insulating connection of the electrode terminal 1022 to the end cap body 1021 can be implemented in two forms, for example, the part where the electrode terminal 1022 is connected to the end cap body 1021 is coated with an insulating layer, or the electrode terminal 1022 includes a conductive part and a second insulating member 1022C, the second The second insulator 1022C is provided between the conductive part and the end cap body 1021 to play an insulating role.
  • the "electrical connection” here includes the cases of direct connection and indirect connection.
  • the electrode assembly 10 is formed by winding a first pole piece 1 and a second pole piece 2 with opposite polarities.
  • the shape of the first pole piece 1 and the second pole piece 2 is basically the same, and may be a strip-shaped structure.
  • the winding body S can be a cylinder, a flat body, a cuboid or other shapes. Different active materials can be coated on the first body part 11 and the second body part 21, one first tab 12 can be provided, or a plurality can be provided at intervals along the winding direction, and one second tab 22 can be provided, or one can be provided along the winding direction.
  • a plurality of winding directions are set.
  • the first pole piece 1 is a positive pole piece
  • the second pole piece 2 is a negative pole piece
  • the first pole piece 1 is a negative pole piece
  • the second pole piece 2 is a positive pole piece.
  • first conductive regions 112 and second conductive regions 113 are arranged at intervals along the radial direction of the winding body S, so that the first tab 12 and the second tab 22 are spaced Separated to avoid short circuit, and the radially spaced area can be used as a liquid guide area because there is no tab, the electrolyte can infiltrate from the liquid guide area to the inside of the winding body S, so that the electrolyte can be discharged during the charging and discharging process of the battery Fully react with the active material on the first pole piece 1 and the second pole piece 2 .
  • an insulating film 103 can be provided between the winding body S and the casing 101;
  • the lead-out lengths are consistent;
  • a second insulating ring 106 can be provided between the end cap assembly 102 and the electrode assembly 10, and the second insulating ring 106 can be made of plastic.
  • first tab 12 and the second tab 22 are drawn out from the same end of the winding body S, and only one end of the electrode assembly 10 needs to be reserved for electrical connection space, which also saves the need for the two ends of the battery cell 100.
  • Electrode terminals 1022 are provided at the terminals, which can effectively increase the overall energy density of the battery cell 100. When the capacity of the battery cell 100 is constant, the volume of the battery cell 100 can be reduced, so that the battery 200 can be used more in the electrical device. Easy layout.
  • this battery cell 100 is provided with only one electrode terminal 1022, the first tab 12 is electrically connected to the electrode terminal 1022, and the second tab 22 is directly electrically connected to the end cap body 1021, which can simplify the structure and structure of the battery cell 100. assembly process. By omitting one electrode terminal, a large space can be reserved on the end cover body 1021, and it is easy to arrange the liquid injection part and the pressure relief part on the end cover body 1021, and it is also convenient for arranging the temperature collection part and the confluence between the battery cells 100. It is also beneficial to increase the cross-sectional area of the electrode terminal 1022 so as to increase the flow-through capacity of the battery cell 100 . When the area of the end cap body 1021 is small, this design has greater advantages.
  • first pole lug 12 and the second pole lug 22 are arranged at intervals along the radial direction, which is beneficial to increase the extension size of the first pole lug 12 and the second pole lug 22 along the circumferential direction of the winding body S, and improve the connection between the pole lug and the winding.
  • the connection strength of the main body S enables the root of the tab to have a better self-supporting effect.
  • the electrical connection effect between the tab 12 and the electrode terminal 1022 , and between the second tab 22 and the end cap body 1021 ensures that the electrode assembly 10 can reliably transmit electric energy to the outside and improve the overcurrent capability.
  • the radially spaced area can not only space the first tab 12 and the second tab 22 for insulation, but also allow the electrolyte to infiltrate the inside of the winding body S from the radially spaced area, ensuring that the electrode assembly
  • the wettability of 13 improves the liquid absorption effect, so that the electrolyte solution and the active material fully react during the charging and discharging process of the battery, thereby optimizing the performance of the battery cell 100 .
  • the first conductive region 112 is located radially inside the second conductive region 113 .
  • the first tab 12 can be drawn out from the middle area of the winding body S, so that the electrode terminal 1022 is located near the middle area of the end cap body 1021, and the surrounding area is reserved for the layout of the liquid injection part and the pressure relief part. It also leaves ample space for arranging the temperature collection components, the busbars between the battery cells 100 and various wires, and is also conducive to increasing the cross-sectional area of the electrode terminal 1022 to increase the overcurrent capacity of the battery cells 100 .
  • the first conductive region 112 is located radially outside of the second conductive region 113 .
  • the end of the wound body S further includes at least one liquid conducting area 111, wherein one liquid conducting area 111 is located adjacent to the first conductive area 112 and the second conductive area along the radial direction of the wound body S 113, used to guide the electrolyte to flow into the inside of the winding body S.
  • the liquid guide area 111 is not provided with tabs, and the gap between the first pole piece 1 or the second pole piece 2 and the diaphragm 3 communicates with the outside of the electrode assembly 10, making it easier for the electrolyte to enter the first pole piece 1 or the second pole
  • the gap between the sheet 2 and the diaphragm 3 flows into the inside of the winding body S, and the diaphragm 3 can also fully play the role of absorbing liquid, so that the electrolyte and the first pole piece 1 and the second pole piece 2 can be separated during the charging and discharging process of the battery.
  • the active substances on it are fully reacted.
  • the first tab 12 and the second tab 22 can be separated in space to play an insulating role. , and can make the electrolyte infiltrate from the liquid guide area 111 to the inside of the winding body S, ensure the wetting performance of the electrode assembly 10, improve the liquid absorption effect, and make the electrolyte and the first pole piece in the process of charging and discharging the battery 1 and the active material on the second pole piece 2 fully react, thereby optimizing the performance of the battery cell 100 .
  • the electrolyte can Simultaneously through the liquid conduction area 111 between the adjacent first conductive area 112 and the second conductive area 113, the liquid conduction area 111 between the adjacent first conductive area 112 and the liquid conduction area between the adjacent second conductive area 113
  • the area 111 enters the inside of the winding body S, so that the electrolyte can be distributed more evenly in the radial direction inside the winding body S during the charging and discharging process of the battery, so that the electrolyte can be connected with the first pole piece 1 and the second pole piece.
  • the active materials on the sheet 2 fully react, thereby optimizing the performance of the battery cell 100 .
  • the electrode assembly 10 further includes a diaphragm 3 for isolating the first pole piece 1 and the second pole piece 2 , the diaphragm 3 , the first body part 11 and the second body part 21 is wound to form a winding body S; in the extension direction of the winding axis K, the part of the diaphragm 3 located in the liquid guide area 111 exceeds the sides of the first body part 11 and the second body part 21 .
  • the diaphragm 3 can be a strip-shaped structure in the unfolded state, and the diaphragm 3 can be made of PP (polypropylene) material or PE (polyethylene) material, and has micropores of micron or nanoscale inside, and can be used for It is used to allow metal ions to pass through during the charging and discharging process of the battery.
  • PP polypropylene
  • PE polyethylene
  • the part of one side of the diaphragm 3 located in the liquid guide area 111 exceeds the side of the first main body part 11 and the side of the second main body part 21; or both sides of the diaphragm 3
  • the part on the side of the liquid guide area 111 is beyond the side of the first body part 11 and the side of the second body part 21 .
  • the diaphragm 3 is widened in the liquid conduction area 111, so that the sides of the diaphragm 3 can protrude outward between the first pole piece 1 and the second pole piece 2 in the liquid conduction area 111, and soaked in the electrolyte In this way, the separator 3 is more likely to absorb the electrolyte under capillary action, improving the wettability of the electrode assembly 10 , thereby improving the performance of the battery cell 100 .
  • the surface of the electrode terminal 1022 away from the electrode assembly 10 is provided with a first groove 1022 ′, the first groove 1022 ′ is recessed toward the direction close to the electrode assembly 10 , and the first groove A first welding portion W1 is formed between the bottom surface of 1022 ′ and the surface of the electrode terminal 1022 close to the electrode assembly 10 , and the first tab 12 is welded to the first welding portion W1 .
  • the shape and size of the first groove 1022' can be set according to the welding area.
  • the first tab 12 and the electrode terminal 1022 can be welded by laser.
  • the thickness of the first welding portion W1 should ensure that welding energy can penetrate, so as to achieve reliable fixing.
  • the thickness of the electrode terminal 1022 in the welding area is reduced, and after the end cover assembly 102 is installed in the housing 101, welding can be performed directly from the outside of the electrode terminal 1022 , simplifies the assembly process, and can improve the firmness of welding, so as to reliably realize the electrical connection between the electrode terminal 1022 and the first tab 12 .
  • the side of the end cap body 1021 away from the electrode assembly 10 is provided with a second groove 1021 ′, and the second groove 1021 ′ is located radially outside the electrode terminal 1022 , the second tab 22 is connected to the position corresponding to the second groove 1021 ′ on the end cover body 1021 .
  • a second welding portion W2 is formed between the bottom surface of the second groove 1021' and the surface of the end cap body 1021 close to the electrode assembly 10, and the second tab 22 is welded to the second welding portion W2.
  • the shape and size of the second groove 1021' may be set according to the welding area.
  • the second tab 22 and the end cap body 1021 can be welded by laser.
  • the thickness of the second welding portion W2 should ensure that the welding energy can penetrate, so as to realize reliable fixing.
  • the end cap body 1021 includes a main body plate 1021A and a protrusion 1021B, the protrusion 1021B is connected to the side of the main body plate 1021A close to the electrode assembly 10, and the second groove 1021' extends into the protrusion 1021B.
  • the protruding part 1021B partially thickens the main plate 1021A on the side close to the electrode assembly 10, so that the second welding part W2 is closer to the second tab 22 in the direction of the winding axis K, so that the second tab 22 and the second tab 22 are easily connected.
  • the end cap body 1021 is directly single-connected without an adapter, which simplifies the structure and reduces the lead-out length of the second tab 22 .
  • the main body plate 1021A is partially thickened, by extending the second groove 1021' into the protruding portion 1021B, the second welding portion W2 can also be kept at an appropriate welding thickness, thereby improving the reliability of electrical connection.
  • the second groove 1021' on the end cover body 1021 by providing the second groove 1021' on the end cover body 1021, the thickness of the end cover body 1021 in the welding area is reduced, and after the end cover assembly 102 is installed in the housing 101, the end cover body 1021 Welding on the outside simplifies the assembly process, and can improve the firmness of the welding, so as to reliably realize the electrical connection between the end cover body 1021 and the second tab 22 .
  • the second groove 1021' is located radially outside the electrode terminal 1022, and there is sufficient space for setting the second groove 1021',
  • the second conductive region 113 extends longer in the circumferential direction, it is beneficial to increase the reliability of the electrical connection between the second tab 22 and the end cap body 1021 by increasing the number or circumferential dimension of the second groove 1021 ′.
  • each second groove 1021 ′ there are multiple second grooves 1021 ′, and the multiple second grooves 1021 ′ are arranged at intervals along the circumference of the winding body S, and each second groove 1021 ' extends circumferentially.
  • the end cover assembly 102 may also include a liquid injection part and a pressure relief part 1024 provided on the end cover body 1021, the liquid injection part is provided between the respective first ends of the two second grooves 1021', and the pressure relief part 1024 is provided Between the respective second ends of the two second grooves 1021'.
  • the liquid injection part may include a through hole 1021C and a cover 1023 provided on the end cap body 1021, the through hole 1021C is used to inject electrolyte, and the cover 1023 seals the through hole 1021C after the electrolyte is injected.
  • the pressure relief component 1024 is used for pressure relief when the internal pressure of the housing 101 exceeds a preset threshold.
  • a plurality of second grooves 1021' are arranged at intervals along the circumferential direction on the end cover body 1021, which can not only improve the reliability of the electrical connection between the second tab 22 and the end cover body 1021, for example, when welding is used to achieve electrical
  • setting multiple welding positions can ensure the welding strength and prevent the welding positions from loosening when the battery 200 is subjected to vibration and impact during use; moreover, liquid injection can also be set between two adjacent second grooves 1021' components and other components such as the pressure relief component 1024, make full use of the space on the end cap body 1021.
  • the battery cell 100 further includes an adapter 104, the first tab 12 is electrically connected to the electrode terminal 1022 through the adapter 104, and/or the second tab 22 is electrically connected to the electrode terminal 1022 through the adapter.
  • the connector 104 is electrically connected to the end cover body 1021 .
  • the electrical connection can be achieved by welding or riveting.
  • the first tab 12 and/or the second tab 22 can be welded to the adapter 104 first, and after the end cap assembly 102 is installed, the electrode terminal 1022 and The adapter 104 is electrically connected, and electrically connects the end cover body 1021 with the adapter 104 .
  • the adapter 104 includes: a first connecting portion 1041 and a second connecting portion 1042 connected to each other, and the size of the first connecting portion 1041 in the radial direction is larger than that of the second connecting portion 1042 .
  • the first connection part 1041 is electrically connected to the first tab 12
  • the second connection part 1042 is electrically connected to the electrode terminal 1022; and/or for The adapter 104 connected between the second tab 22 and the end cap body 1021 , the first connecting portion 1041 is electrically connected to the second tab 22
  • the second connecting portion 1042 is connected to the end cap body 1021 .
  • the first connecting portion 1041 can adopt a disk-like structure, which can increase the connection area with the first tab 12 or the second tab 22 to improve connection reliability, and is especially suitable for winding the first tab 12.
  • the structure of at least one circle enables the first tab 12 to be connected to the first connecting portion 1041 in the entire circumferential direction.
  • the second connecting portion 1042 may be in a cylindrical structure, one end of the cylindrical structure may be connected to the first connecting portion 1041 , for example at the center of the first connecting portion 1044 , and the other end of the cylindrical structure may be connected to the electrode terminal 1022 . Considering that the size of the electrode terminal 1022 is small, the electrical connection between the first tab 12 and the electrode terminal 1022 through the adapter 104 can improve the reliability of power transmission.
  • the first connecting portion 1041 can cover more tab layers in the first tab 12 or the second tab 22 in the radial direction , increase the connection length between the first connecting part 1041 and the first tab 12 or the second tab 22 in the radial direction, and improve the reliability of the electrical connection.
  • the welding track can pass through more poles.
  • the ear layer makes the connection between the first connecting portion 1041 and the tab more firm.
  • the second connecting portion 1042 can be adapted to the connection area of the electrode terminal 1022 or the end cap body 1021, thereby adapting to the smaller cross-sectional area of the electrode terminal 1022 and reducing the size of the end cap body 1021
  • the electrical connection area on the board to leave room for laying out other components.
  • first tab 12 may also be directly electrically connected to the electrode terminal 1022
  • second tab 22 may also be directly electrically connected to the end cap body 1021 .
  • Whether the first tab 12 and the second tab 22 need to be provided with an adapter 104 can be determined according to connection requirements.
  • the adapter 104 by providing the adapter 104, the requirements for the positional relationship between the first tab 12 and the electrode terminal 1022, and the second tab 22 and the end cap body 1021 can be reduced, thereby reducing the technical difficulty of electrical connection ; Moreover, because the multiple lugs are relatively fluffy, it is easier to improve the connection reliability through the adapter 104 to increase the overcurrent capacity of the inner and outer ring lugs.
  • the adapter 104 when the electrical connection is performed by welding, the adapter 104
  • the welding trajectory with the tab can be controlled, which can improve the firmness of the welding; in addition, it can also prevent damage to the tab or the winding body S during electrical connection, for example, when welding is used, it can prevent the welding energy from burning the tab,
  • the winding main body S is deformed or the coating layer on the first main body part 11 and the second main body part 21 is peeled off.
  • the first tab 12 is wound at least one full turn, and/or the second tab 22 is wound at least one full turn.
  • the tab is continuously extended and wound for at least one turn, and has better connection strength with the winding main body S in the circumferential direction, so that the root of the tab has a better self-supporting effect, and when the circumferential action is applied to the tab
  • the process of rubbing and flattening prevent the tabs from wrinkling, make the shape of the flattened area stable, optimize the welding effect between the first tab 12 and the electrode terminal 1022 and the second tab 22 and the end cover body 1021, and ensure the electrode assembly 10 Reliably transmit electric energy to the outside, and improve the over-current capability.
  • the particles generated during tab welding are not easy to fall between the first pole piece 1 and the second pole piece 2 of the liquid guide area 111 along the circumference, which can improve the reliability of the electrode assembly 10 and prevent short circuits. Or the problem of pole piece scratches.
  • the first requirement can be satisfied.
  • the flow capacity of the tab 12 and the second tab 22 does not require discrete tabs on the entire winding length of the main body, which can simplify the process of die-cutting the pole piece.
  • the first tab 12 is wound multiple times in the first conductive region 112
  • the second tab 22 is wound multiple times in the second conductive region 113 .
  • the first tab 12 or the second tab 22 can be wound at least twice.
  • the number of winding turns should be at least 5. The number of turns can be designed according to the current flow capacity and polarization of the electrode assembly 10 .
  • the tabs are wound multiple times in the conductive area, and the bending parts of two adjacent tab layers in the tabs are overlapped after kneading, so as to further strengthen the supporting effect of the tabs and prevent the tabs from rubbing. Wrinkle flat to stabilize the shape of the bent portion and optimize the welding effect between the first tab 12 and the electrode terminal 1022 and between the second tab 22 and the end cap body 1021 . Moreover, the welding area between the electrode terminal 1022 or the end cover body 1021 after the tab is flattened can be increased, so that the welding between the first tab 12 and the electrode terminal 1022 and the second tab 22 and the end cover body 1021 is more efficient. Firmness ensures that the electrode assembly 10 can reliably transmit electric energy to the outside, and improves the overcurrent capability.
  • the battery cell 100 further includes a first insulating member 107 , at least part of the first insulating member 107 is disposed on the adjacent first conductive region 112 along the radial direction of the winding body S. and the second conductive region 113.
  • the cross section of the first insulator 107 can be in an L-shaped structure, the transverse part of the L-shaped structure is connected to the end cap body 1021 , and the vertical part extends to the area between the first tab 12 and the second tab 22 .
  • first tab 12 and the second tab 22 can be separated by the first insulating member 107, so as to prevent the first tab 12 and the second tab 22 from contact short circuit due to vibration or impact, and improve battery performance.
  • the working reliability of monomer 100 is the working reliability of monomer 100.
  • the first pole piece 1 is provided with a plurality of first tabs 12 at intervals along the winding direction, and the plurality of first tabs 12 form at least one first tab group 12 ′.
  • the first tab group 12' extends circumferentially along a portion of the winding body S, and includes layers stacked in the radial direction. A plurality of first tabs 12.
  • the second pole piece 2 is provided with a plurality of second tabs 22 at intervals along the winding direction, the plurality of second tabs 22 form at least one second tab group 22 ′, and at least one second conductive region 113 is provided,
  • the second tab set 22 ′ is disposed corresponding to the second conductive region 113 , the second tab set 22 ′ extends along a portion of the winding body S, and includes a plurality of second tabs 22 stacked in a radial direction.
  • first conductive regions 112 there are two first conductive regions 112, and the two first conductive regions 112 respectively lead to a first tab group 12', and the two first conductive regions 112 are arranged symmetrically with respect to the winding axis K;
  • Two regions 113 are provided, and two second conductive regions 113 respectively lead to a second tab set 22 ′, and the two second tab sets 22 ′ are arranged symmetrically with respect to the winding axis K.
  • the second conductive region 113 may be located radially outside of the first conductive region 112 .
  • the multiple first tabs 12 in the first tab set 12' have the same width along the winding direction; and/or the multiple second tabs 22 in the second tab set 13' have the same width along the winding direction.
  • the tab set is similar to a rectangular structure, except that the two radially opposite sides of the rectangular structure are arc-shaped.
  • the same side ends of multiple tabs in the tab group are aligned to increase the effective contact area when the tab group is electrically connected to the electrode terminal 1022 or the end cover body 1021 and improve the overcurrent capability.
  • This structure makes the width of multiple tabs in the tab group equal, which can reduce the difficulty of die-cutting the tabs, easily ensure the size of the tabs, and ensure the alignment of multiple tabs during winding, thereby reducing the cost of preparing electrodes. Process difficulty of component 10.
  • first tab set 12' and the second tab set 22' may also be fan-shaped.
  • the tab lead-out method of this embodiment can reduce the weight of the electrode assembly 10 on the basis of ensuring the current transmission capability, thereby reducing the weight of the battery cell 100 .
  • the battery cell 100 includes a casing 101 , an end cap assembly 102 and an electrode assembly 10 .
  • the housing 101 has an opening 1011 , and the end cap assembly 102 is used to close the opening 1011 .
  • the end cap assembly 102 includes an end cap body 1021 and an electrode terminal 1022 insulatedly connected to the end cap body 1021 .
  • the end cap body 1021 is used to cover the opening 1011 .
  • the battery cell 100 may have a cylindrical shape.
  • the electrode assembly 10 is arranged in the casing 101. As shown in FIG. An annular liquid conducting area 111 , a first conducting area 112 and a second conducting area 113 are arranged concentrically at one end of the ring, and the liquid conducting area 111 is located between the first conducting area 112 and the second conducting area 113 in the radial direction.
  • the first tab 12 is drawn out from the first conductive region 112 and wound at least one turn
  • the second tab 22 is drawn out from the second conductive region 113 and wound at least one turn, for example, wound five times.
  • the first pole piece 1 includes a first body part 11 and a first lug 12 protruding from the first body part 11
  • the second pole piece 2 includes a second body part 21 and a first lug 12 protruding from the second body part 11 .
  • the second tab 22 of the body part 21, the first pole piece 1, the second pole piece 2 and the diaphragm 3 are configured to be wound around the winding axis K such that the first body part 11, the second body part 21 and the diaphragm 3 superimposed to form a winding body S.
  • the first tab 12 and the second tab 22 are located at the same end of the winding body S along the winding axis, and the first tab 12 and the second tab 22 are respectively located at the inner end and the outer end along the winding direction. At least one side of the diaphragm 3 located in the liquid guiding area 111 can exceed the first body part 11 and the second body part 21 .
  • the first tab 12 is electrically connected to the electrode terminal 1022 , and the centerline of the electrode terminal 1022 coincides with the winding axis K, and the second tab 22 is electrically connected to the end cap body 1021 .
  • the electrode terminal 1022 can be designed as a composite electrode terminal, which includes a first terminal part 1022A, a second terminal part 1022B and a second insulator 1022C, the first terminal part 1022A and the second terminal part 1022B are connected along the direction of the winding axis K,
  • the second terminal portion 1022B is located between the first terminal portion 1022A and the electrode assembly 10 , and the second insulating member 1022C is sheathed outside the first terminal portion 1022A and the second terminal portion 1022B.
  • the electrode terminal 1022 is a negative terminal
  • the first terminal part 1022A is made of aluminum material, and is used to connect with the external circuit of the battery cell 100
  • the second terminal part 1022B is made of copper material, and can be designed as a disc structure
  • the second terminal portion 1022B is directly electrically connected to the first tab 12 , for example, by means of welding or the like.
  • the first terminal part 1022A is provided with a through hole extending along the winding axis K to form a first groove 1022' on the surface of the electrode terminal 1022 away from the electrode assembly 10, and the part of the second terminal part 1022B corresponding to the through hole is used as
  • the first welding portion W1 is welded to the first tab 12 .
  • the surface of the end cover body 1021 away from the electrode assembly 10 is provided with a second groove 1021 ′, the second groove 1021 ′ is recessed toward the direction close to the electrode assembly 10 , and the bottom surface of the second groove 1021 ′ is close to the electrode assembly 1021 .
  • a second welding portion W2 is formed between surfaces of the component 10 , and the second tab 22 is welded to the second welding portion W2 .
  • the end cap body 1021 includes a main body plate 1021A and a protrusion 1021B, the protrusion 1021B is connected to the side of the main body plate 1021A close to the electrode assembly 10, and the second groove 1021' extends into the protrusion 1021B.
  • the protruding part 1021B protrudes to abut against the second tab set 13, and directly welds the second welding part W2 to the second tab 22 through the second groove 1021', without the need for an adapter 104.
  • the extension length of the first tab 12 is greater than that of the second tab 22 .
  • the housing 101 has a recessed portion 1012, which is recessed inwardly relative to the outer wall of the housing 11 in the circumferential direction.
  • the housing 101 forms a bent portion 1013 at one end of the recessed portion 1012 close to the opening 1011.
  • the bent portion 1013 has The accommodating cavity, the radially outer end of the end cover body 1021 is inserted into the accommodating cavity, and the battery cell 100 further includes a seal 109 disposed between the bent portion 1013 and the end cover body 1021 .
  • the recessed portion 1012 may extend along the entire circumferential direction of the housing 101 , or a plurality of recessed portions 1012 may be arranged at intervals in the circumferential direction of the housing 101 .
  • the seal 109 can be a sealing ring, and the cross section of the sealing ring can be a C-shaped structure.
  • the sealing ring is sleeved on the outer end of the end cover body 1021 to insulate the end cover body 1021 from the housing 101 .
  • one end of the C-shaped structure close to the electrode assembly 10 may be provided with an extension, and the extension extends toward the electrode assembly 10 to insulate the concave portion 1012 from the internal structure of the battery cell 10 .
  • materials such as rubber can be used for the sealing member 109 .
  • the sealing member 109 is sleeved on the outer end of the end cover assembly 102 along the radial direction first, and the end cover assembly 102 is put into the housing 101 from the opening 1011, and the end cover assembly 102 abuts against Leaning against the recessed portion 1012 , the housing 101 is bent at the end of the recessed portion 1012 close to the opening 1011 to form a bent portion 1013 , and the bent portion 1013 is wrapped around the seal 109 .
  • the fixing between the end cover assembly 102 and the housing 101 is realized by adopting the upsetting method, and the seal 109 is provided to realize the insulation between the end cover body 1021 and the housing 101, so that the end cover body 1021 is used as an electrode In the case of terminals, the case 101 can be de-energized, which improves the safety of the battery cell 100 in operation.
  • FIG. 9 is a schematic diagram of a second embodiment of a battery cell 100 of the present application.
  • the tab 12 is electrically connected to the electrode terminal 1022 through the adapter 104 .
  • the adapter 104 includes: a first connecting portion 1041 and a second connecting portion 1042 connected to each other, and the size of the first connecting portion 1041 in the radial direction is larger than that of the second connecting portion 1042 .
  • the first connection part 1041 is electrically connected to the first tab 12
  • the second connection part 1042 is electrically connected to the electrode terminal 1022.
  • FIG. 10 is a schematic diagram of a third embodiment of a battery cell 100 of the present application.
  • the battery cell 100 further includes a first insulating member 107, and At least partly arranged between the adjacent first conductive region 112 and the second conductive region 113 along the radial direction of the rolled body S, and there is a predetermined distance H between the first insulating member 107 and the end surface of the rolled body S.
  • the cross section of the first insulator 107 can be in an L-shaped structure, the transverse part of the L-shaped structure is connected to the end cap body 1021, the vertical part extends to the area between the first tab 12 and the second tab 22, and There is a preset distance H from the end face of the winding body S.
  • FIG. 11 is a schematic diagram of a fourth embodiment of a battery cell 100 of the present application.
  • the difference from the first embodiment shown in FIG. 8 is that the second terminal part 1022B is designed so that a partial area of the plate-like structure faces the electrode assembly 10 protrudes to be able to be connected with the first tab 12 , so as to save the provision of the adapter piece 104 .
  • Fig. 12 is a schematic diagram of a fifth embodiment of a battery cell 100 of the present application, which is different from the second embodiment shown in Fig. 9 in that a central tube 108 is provided in the hollow area of the winding body S located at the center of the winding, One end of the central tube 108 is flush with the first tab 12 , so that the central tube 108 can provide support when the adapter 104 is placed and welded with the first tab 12 .
  • the present application also provides a method for manufacturing a battery cell 100.
  • the method includes:
  • S110, component providing step provide the housing 101, the end cap assembly 102, and the first pole piece 1 and the second pole piece 2 with opposite polarities; wherein, the housing 101 has an opening 1011, and the end cap assembly 102 includes an end cap body 1021 And the electrode terminal 1022 provided on the end cap body 1021, the first pole piece 1 includes a first body part 11 and the first tab 12 protruding from the first body part 11, and the second pole piece 2 includes a second body part 21 and the second tab 22 protruding from the second body part 21;
  • pole piece winding step winding the first pole piece 1 and the second pole piece 2 around the winding axis K, so that the first main body part 11 and the second main body part 21 are superimposed to form a winding main body S,
  • One end of the winding body S includes a first conductive area 112 and a second conductive area 113; the first tab 12 is drawn out from the first conductive area 112, the second tab 22 is drawn out from the second conductive area 113, and the adjacent first The conductive region 112 and the second conductive region 113 are arranged at intervals along the radial direction of the winding body S;
  • end cap installation step close the end cap assembly 102 to the opening 1011 , electrically connect the first tab 12 to the electrode terminal 1022 , and electrically connect the second tab 22 to the end cap body 1021 .
  • S110-S130 are executed sequentially.
  • first tab 12 and the second tab 22 are drawn out from the same end of the winding body S, and only one end of the electrode assembly 10 needs to be reserved for electrical connection space, which also saves the need for the two ends of the battery cell 100.
  • Electrode terminals 1022 are provided at the terminals, which can effectively increase the overall energy density of the battery cell 100. When the capacity of the battery cell 100 is constant, the volume of the battery cell 100 can be reduced, so that the battery 200 can be used more in the electrical device. Easy layout.
  • the battery cell 100 is provided with only one electrode terminal 1022 , which can simplify the structure and assembly process of the battery cell 100 .
  • one electrode terminal By omitting one electrode terminal, a large space can be reserved on the end cap body 1021, and it is easy to arrange the liquid injection part and the pressure relief part 1024 on the end cap body 1021, and it is also convenient for arranging the temperature collection part and the space between the battery cells 100. It is also beneficial to increase the cross-sectional area of the electrode terminal 1022 to increase the flow capacity of the battery cell 100 by leaving sufficient space for the busbar and various wires.
  • first pole lug 12 and the second pole lug 22 are arranged at intervals along the radial direction, which is beneficial to increase the extension size of the first pole lug 12 and the second pole lug 22 along the circumferential direction of the winding body S, and improve the connection between the pole lug and the winding.
  • the connection strength of the main body S enables the root of the tab to have a better self-supporting effect.
  • the electrical connection effect between the tab 12 and the electrode terminal 1022 , and between the second tab 22 and the end cap body 1021 ensures that the electrode assembly 10 can reliably transmit electric energy to the outside and improve the overcurrent capability.
  • the present application also provides a manufacturing device 400 of the battery cell 100. In some embodiments, as shown in FIG. device 430 .
  • the component providing device 410 is configured to provide the casing 101, the end cap assembly 102, and the first pole piece 1 and the second pole piece 2 with opposite polarities; wherein the casing 101 has an opening 1011, and the end cap assembly 102 includes an end cap body 1021 and the electrode terminal 1022 provided on the end cap body 1021, the first pole piece 1 includes a first body part 11 and the first tab 12 protruding from the first body part 11, and the second pole piece 2 includes a second body part 21 and the second tab 22 protruding from the second body part 21 .
  • the pole piece winding device 420 is configured to wind the first pole piece 1 and the second pole piece 2 around the winding axis K so that the first body part 11 and the second body part 21 are superimposed and form a winding body S , one end of the winding body S includes a first conductive region 112 and a second conductive region 113; the first tab 12 is drawn out from the first conductive region 112, the second tab 22 is drawn out from the second conductive region 113, and the adjacent second A conductive region 112 and a second conductive region 113 are arranged at intervals along the radial direction of the winding body S. As shown in FIG.
  • the end cap installation device 430 is configured to close the opening 1011 of the end cap assembly 102 , electrically connect the first tab 12 to the electrode terminal 1022 , and electrically connect the second tab 22 to the end cap body 1021 .

Abstract

一种电池单体(100)及其制造方法和设备、电池(200)、用电装置，其中，电池单体(100)包括：壳体(101)；端盖组件(102)，包括端盖本体(1021)和绝缘连接于端盖本体(1021)的电极端子(1022)；和电极组件(10)，设在壳体(101)内且包括：极性相反的第一极片(1)和第二极片(2)，第一极片(1)包括第一主体部(11)和凸出于第一主体部(11)的第一极耳(12)，第二极片(2)包括第二主体部(21)和凸出于第二主体部(21)的第二极耳(22)，第一极片(1)和第二极片(2)被配置为绕卷绕轴线(K)卷绕，以使第一主体部(11)和第二主体部(21)相叠加并形成卷绕主体(S)；卷绕主体(S)的一端包括第一导电区(112)和第二导电区(113)，第一极耳(12)在第一导电区(112)引出，第二极耳(22)在第二导电区(113)引出，相邻的第一导电区(112)和第二导电区(113)沿卷绕主体(S)的径向间隔设置；其中，第一极耳(12)与端子(1022)电连接，第二极耳(22)与端盖本体(1021)电连接。

Description

电池单体及其制造方法和装置、电池、用电装置 技术领域
本申请涉及电池技术领域，特别是涉及一种电池单体及其制造方法和设备、电池、用电装置。
背景技术
随着由于锂离子等电池具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，在电动汽车上面已普遍应用。
但是，提高电动汽车的电池的工作性能，一直是业内的一个难题。
发明内容
本申请的目的在于提高电池的性能。
根据本申请的第一方面，提供了一种电池单体，包括：
壳体，具有开口；
端盖组件，用于封闭开口，端盖组件包括端盖本体和设在端盖本体上的电极端子；和
电极组件，设在壳体内且包括：极性相反的第一极片和第二极片，第一极片包括第一主体部和凸出于第一主体部的第一极耳，第二极片包括第二主体部和凸出于第二主体部的第二极耳，第一极片和第二极片被配置为绕卷绕轴线卷绕，以使第一主体部和第二主体部相叠加并形成卷绕主体；卷绕主体的一端包括第一导电区和第二导电区，第一极耳在第一导电区引出，第二极耳在第二导电区引出，相邻的第一导电区和第二导电区沿卷绕主体的径向间隔设置；
其中，第一极耳与电极端子电连接，第二极耳与端盖本体电连接。
该实施例将第一极耳和第二极耳从卷绕主体的同一端引出，只需要在电极组件的一端预留电连接空间，也省去了在电池单体的两端分别设置电极端子，可有效提高电池单体的整体能量密度，在电池单体的容量一定的情况下，能够减小电池单体的体积，使电池在用电装置中更容易布局。
而且，此种电池单体只设置一个电极端子，第一极耳与电极端子电连接，第二极耳直接与端盖本体电连接，可简化电池单体的结构和装配工艺。通过省去一个电极端子， 可在端盖本体上留出较大空间，易于在端盖本体上布局注液部件和泄压部件，也为布置温度采集部件、电池单体间的汇流件和各类导线留出充裕的空间，也有利于增大电极端子的横截面积，以增加电池单体的过流能力。对于端盖本体的面积较小时，此种设计具有更大的优势。
另外，第一极耳和第二极耳沿径向间隔设置，有利于增加第一极耳和第二极耳沿卷绕主体周向的延伸尺寸，提高极耳与卷绕主体的连接强度，使极耳根部具有较好的自支撑作用，在对极耳施加周向作用力揉平的过程中，减少极耳打皱现象，使揉平区域形状稳定，优化第一极耳与电极端子、第二极耳与端盖本体之间的电连接效果，保证电极组件可靠地向外传输电能，并提高过流能力。
在一些实施例中，第一导电区位于第二导电区的径向内侧。
该实施例能够使第一极耳从卷绕主体的中间区域引出，从而使电极端子位于端盖本体靠近中间区域的位置，留出周围的区域布局注液部件和泄压部件，也为布置温度采集部件、电池单体间的汇流件和各类导线留出充裕的空间，也有利于增大电极端子的横截面积，以增加电池单体的过流能力。可选地，第一导电区位于第二导电区的径向外侧。
在一些实施例中，电极端子远离电极组件的面设有第一凹槽，第一凹槽朝向靠近电极组件的方向凹入，第一凹槽底面与电极端子靠近电极组件的表面之间形成第一焊接部，第一极耳与第一焊接部焊接。
该实施例通过在电极端子上设置第一凹槽，减薄了电极端子在焊接区域的厚度，能够在端盖组件安装于壳体之后，直接从电极端子外侧进行焊接，简化了装配工艺，而且能够提高焊接的牢固性，以可靠地实现电极端子与第一极耳的电连接。
在一些实施例中，端盖本体远离电极组件的面上设有第二凹槽，第二凹槽朝向靠近电极组件的方向凹入，第二凹槽底面与端盖本体靠近电极组件的表面之间形成第二焊接部，第二极耳与第二焊接部焊接。
该实施例通过在端盖本体上设置第二凹槽，减薄了端盖本体在焊接区域的厚度，能够在端盖组件安装于壳体之后，直接从端盖本体外侧进行焊接，简化了装配工艺，而且能够提高焊接的牢固性，以可靠地实现端盖本体与第二极耳的电连接。
在一些实施例中，第二凹槽设有多个，且多个第二凹槽沿卷绕主体的周向间隔设置。
该实施例在端盖本体上沿周向间隔设置多个第二凹槽，不仅能够提高第二极耳与端盖本体之间电连接可靠度，例如，在采用焊接实现电连接时，设置多个焊接位置可保证焊接强度，防止电池在使用过程中受到振动和冲击时焊接位置发生松脱；而且还能在 相邻两个第二凹槽之间设置注液部件和泄压部件等其它部件，充分利用端盖本体上的空间。
在一些实施例中，电池单体还包括转接件，第一极耳通过转接件与电极端子电连接，和/或第二极耳通过转接件与端盖本体电连接。
该实施例通过设置转接件，可降低对第一极耳与电极端子、以及第二极耳与端盖本体之间的位置关系的要求，从而降低了电连接的工艺难度；而且，由于多个极耳较为蓬松，通过转接件更容易提高连接可靠性，以增加内外圈极耳的过流能力，例如，在采用焊接的方式进行电连接时，转接件与极耳的焊接轨迹可控制，可提高焊接的牢固性；另外，还可防止在电连接时对极耳或卷绕主体造成损伤，例如在采用焊接时，可防止焊接能量灼伤极耳、使卷绕主体发生变形或第一主体部、第二主体部上的涂覆层发生脱落等。
在一些实施例中，第一极耳至少卷绕一个整圈，和/或第二极耳至少卷绕一个整圈。
该实施例使极耳连续延伸并卷绕至少一圈，在周向上与卷绕主体具备较好的连接强度，使极耳根部具有较好的自支撑作用，在对极耳施加周向作用力揉平的过程中，防止出现极耳打皱现象，使揉平区域形状稳定，优化第一极耳与电极端子以及第二极耳与端盖本体的焊接效果，保证电极组件可靠地向外传输电能，并提高过流能力。此外，极耳焊接时产生的粒子也不容易沿周向掉落到导液区的第一极片和第二极片之间，可提高电极组件工作的可靠性，防止出现短路或极片划伤的问题。
此外，通过在第一主体部的部分卷绕长度上设置连续的第一极耳，并在第二主体部的部分卷绕长度上设置连续的第二极耳，能够满足第一极耳和第二极耳的过流能力，无需在主体部的整个卷绕长度上设置离散极耳，可简化模切极片工序，同时在第一极片和第二极片卷绕形成卷绕主体时，也无需进行极耳对位，可简化工艺，提升电极组件的生产效率。
在一些实施例中，第一极耳在第一导电区卷绕多圈，和/或第二极耳在第二导电区卷绕多圈。
该实施例通过使极耳在导电区卷绕多圈，揉平后极耳中相邻两个极耳层的弯折部相互搭接，进一步强化极耳受到的支撑作用，可防止极耳揉平打皱，使弯折部形状稳定，优化第一极耳与电极端子以及第二极耳与端盖本体之间的焊接效果。而且，还可增大极耳揉平后与电极端子或端盖本体之间的焊接面积，使第一极耳与电极端子以及第二极耳与端盖本体的焊接更牢固，保证电极组件可靠地向外传输电能，并提高过流能力。
在一些实施例中，第一极片沿卷绕方向间隔设置多个第一极耳，多个第一极耳形 成至少一个第一极耳组，第一导电区设有至少一个，第一极耳组与第一导电区对应设置，第一极耳组沿卷绕主体的部分周向延伸，且包括沿径向层叠设置的多个第一极耳；和/或
第二极片沿卷绕方向间隔设置多个第二极耳，多个第二极耳形成至少一个第二极耳组，第二导电区设有至少一个，第二极耳组与第二导电区对应设置，第二极耳组沿卷绕主体的部分周向延伸，且包括沿径向层叠设置的多个第二极耳。
该实施例的极耳引出方式在保证电流传输能力的基础上，可减小电极组件的重量，从而减小电池单体的重量。
在一些实施例中，卷绕主体的端部还包括至少一个导液区，其中一个导液区沿卷绕主体的径向位于相邻的第一导电区和第二导电区之间，用于引导电解液流入卷绕主体的内部。
该实施例通过在相邻的第一导电区和第二导电区之间设置导液区，既能够将第一极耳和第二极耳在空间上隔开起到绝缘作用，又能使电解液从导液区浸润到卷绕主体的内部，保证电极组件的浸润性能，提高吸液效果，以在电池充放电的过程中，使电解液与第一极片和第二极片上的活性物质充分发生反应，从而优化电池单体的性能。
在一些实施例中，导液区设有多个，卷绕主体的端部具有多个沿径向间隔设置的第一导电区，相邻第一导电区之间设有导液区；和/或卷绕主体的端部具有多个沿径向间隔设置的第二导电区，相邻第二导电区之间设有导液区。
该实施例通过沿径向间隔设置多个第一导电区和/或第二导电区，能够在保证极耳过流能力的基础上，更有利于提高电解液的浸润性能，电解液可以同时通过相邻第一导电区和第二导电区之间的导液区、相邻第一导电区之间的导液区以及相邻第二导电区之间的导液区进入卷绕主体内部，以在电池充放电的过程中，使电解液在卷绕主体内部沿径向的分布更加均匀，由此电解液可与第一极片和第二极片上的活性物质充分发生反应，从而优化电池单体的性能。
在一些实施例中，电极组件还包括隔膜，隔膜用于隔离第一极片和第二极片，隔膜、第一主体部和第二主体部卷绕后形成卷绕主体；在卷绕轴线的延伸方向上，隔膜位于导液区的部分超出第一主体部和第二主体部的侧边。
该实施例将隔膜在导液区加宽，能够使隔膜的侧边在导液区在第一极片和第二极片之间向外伸出，并浸泡在电解液中，从而使隔膜更容易在毛细作用下吸取电解液，提高电极组件的浸润性能，进而提升电池单体的性能。
在一些实施例中，电池单体还包括第一绝缘件，第一绝缘件的至少部分沿卷绕主体的径向设在相邻的第一导电区和第二导电区之间。
该实施例能够通过第一绝缘件将第一极耳和第二极耳隔开，以防止第一极耳和第二极耳由于受到振动或冲击时发生接触短路，提高电池单体的工作可靠性。
根据本申请的第二方面，提供了一种电池，包括：上述实施例的电池单体和箱体，箱体用于容纳电池单体。
根据本申请的第三方面，提供了一种用电装置，包括上述实施例的电池，电池用于为用电装置提供电能。
根据本申请的第四方面，提供了一种电池单体的制造方法，包括：
部件提供步骤：提供壳体、端盖组件以及极性相反的第一极片和第二极片；其中，壳体具有开口，端盖组件包括端盖本体和设在端盖本体上的电极端子，第一极片包括第一主体部和凸出于第一主体部的第一极耳，第二极片包括第二主体部和凸出于第二主体部的第二极耳；
极片卷绕步骤：将第一极片和第二极片绕卷绕轴线卷绕，以使第一主体部和第二主体部相叠加并形成卷绕主体，卷绕主体的一端包括第一导电区和第二导电区；第一极耳在第一导电区引出，第二极耳在第二导电区引出，相邻的第一导电区和第二导电区沿卷绕主体的径向间隔设置；
端盖安装步骤：将端盖组件封闭开口，并将第一极耳与电极端子电连接，第二极耳与端盖本体电连接。
根据本申请的第五方面，提供了一种电池单体的制造装置，包括：
部件提供设备，被配置为提供壳体、端盖组件以及极性相反的第一极片和第二极片；其中，壳体具有开口，端盖组件包括端盖本体和设在端盖本体上的电极端子，第一极片包括第一主体部和凸出于第一主体部的第一极耳，第二极片包括第二主体部和凸出于第二主体部的第二极耳；
极片卷绕设备，被配置为将第一极片和第二极片绕卷绕轴线卷绕，以使第一主体部和第二主体部相叠加并形成卷绕主体，卷绕主体的一端包括第一导电区和第二导电区；第一极耳在第一导电区引出，第二极耳在第二导电区引出，相邻的第一导电区和第二导电区沿卷绕主体的径向间隔设置；和
端盖安装设备，被配置为将端盖组件封闭开口，并将第一极耳与电极端子电连接，第二极耳与端盖本体电连接。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使 用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，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，还可以根据附图获得其他的附图。
图1为本申请将电池安装于车辆的一些实施例的结构示意图。
图2为本申请电池的一些实施例的分解图。
图3为本申请电池单体的一些实施例的结构示意图。
图4为本申请电池单体的一些实施例的分解图。
图5为电极组件的一些实施例的端部结构示意图。
图6为图5所示电极组件的展开图。
图7为本申请电池单体的一些实施例的俯视图。
图8为图7所示电池单体的第一实施例的A-A剖视图。
图9为图7所示电池单体的第二实施例的A-A剖视图。
图10为图7所示电池单体的第三实施例的A-A剖视图。
图11为图7所示电池单体的第四实施例的A-A剖视图。
图12为图7所示电池单体的第五实施例的A-A剖视图。
图13为电极组件的另一些实施例的端部结构示意图。
图14为本申请电池单体制造方法的一些实施例的流程示意图。
图15为本申请电池单体制造装置的一些实施例的模块组成示意图。
在附图中，附图并未按照实际的比例绘制。
标记说明：
10、电极组件；1、第一极片；11、第一主体部；12、第一极耳；12’、第一极耳组；2、第二极片；21、第二主体部；22、第二极耳；22’第二极耳组；3、隔膜；111、导液区；112、第一导电区；113、第二导电区；
100、电池单体；101、壳体；1011、开口；1012、凹入部；1013、弯折部；102、端盖组件；1021、端盖本体；1021’、第二凹槽；1021A、主体板；1021B、凸出部；1021C、通孔；1022、电极端子；1022’、第一凹槽；1022A、第一端子部；1022B、第二端子部；1022C、第二绝缘件；1023、盖体；1024、泄压部件；103、绝缘膜；104、转接件；1041、第一连接部；1042、第二连接部；105；第一绝缘环；106、第二绝缘环；107、第一绝缘件；108、中心管；109、密封件；
200、电池；201、箱体；201A、容纳部；201B、第一盖体；201C、第二盖体；
300、车辆；301、车桥；302、车轮；303、马达；304、控制器；
400、制造装置；410、部件提供设备；420、极片卷绕设备；430、端盖安装设备；
S、卷绕主体；K、卷绕轴线；W1、第一焊接部；W2、第二焊接部。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，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的限制。
此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”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。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一些实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
本申请采用了“上”、“下”、“顶”、“底”、“前”、“后”、“内”和“外”等指示的方位或位置关系的描述，这仅是为了便于描述本申请，而不是指示或暗示所指的装置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保护范围的限制。
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。
目前的电池单体通常包括壳体和容纳于壳体内的电极组件，并在壳体内填充电解质。电极组件主要由极性相反的第一极片和第二极片层叠或卷绕形成，并且通常在第一极片与第二极片之间设有隔膜。第一极片和第二极片涂覆有活性物质的部分构成电极组件的主体部，第一极片和第二极片未涂覆活性物质的部分各自构成第一极耳和第二极耳。在锂离子电池中，第一极片可以为正极极片，包括正极集流体和设于正极集流体两侧的正极活性物质层，正极集流体的材料例如可以为铝，正极活性物质例如可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等；第二极片可以为负极极片，包括负极集流体和设于负极集流体两侧的负极活性物质层，负极集流体的材料例如可以为铜，负极活性物质例如可以为石墨或硅等。第一极耳和第二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。在电池单体的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接端子以形成电流回路。
目前的电池单体通常设有极性相反的第一电极端子和第二电极端子，用于接入用电回路进行供电，第一极耳与第一电极端子电连接，第二极耳与第二电极端子电连接。例如，对于圆柱形电池单体，由于电池单体端部面积较小，第二极耳与第二电极端子分别设在电池单体的两端，相应地，第一极耳和第二极耳分别从电极组件的两端引出。发明人在实践中发现，每一端的极耳和电极端子都会占用一定空间用于电连接，需要在电池单体的高度方向消耗更多的空间，造成电池单体整体体积增大，且会影响电池单体的整体能量密度。
为了提升电池单体的能量密度，发明人想到将第一电极端子和第二电极端子设在电池单体的同一端上，相应地，将第一极耳和第二极耳从电极组件的同一端引出。但是，此种设置方式面临如下两方面的难题。
1、空间布局问题：在端盖同时设置两个电极端子会较为拥挤，还需考虑两个电极端子的绝缘问题，除此之外，端盖上还要设置注液孔、泄压部件，布置温度采集部件、电池单体间的汇流件和各类导线等，在端盖面积较小时难以进行空间布局。
2、绝缘问题：第一电极端子和第二电极端子设在电池单体的同一端需要可靠地进行绝缘，而且从电极组件的同一端引出的第一极耳和第二极耳在引出时也需考虑绝缘问题，以提高电池单体工作的可靠性。
基于上述问题的发现，本申请的发明人从提高电池单体能量密度，且改善端盖上空间布局的思路出发，对电池单体输出电能的方式进行了改进。
端盖组件包括端盖本体和电极端子，电极端子绝缘连接于端盖本体；电极组件的卷绕主体的端部包括第一导电区和第二导电区，第一极耳在第一导电区引出，第二极耳在第二导电区引出，相邻的第一导电区和第二导电区沿卷绕主体的径向间隔设置；其中，第一极耳与端子电连接，第二极耳与端盖本体电连接。此种电池单体可提升整体能量密度，并通过省去一个电极端子，简化了电池单体的结构和装配工艺，并在端盖本体上留出较大空间，为在端盖上布置各部件的布置留出充裕的空间。
本申请实施例的电池单体适用于电池以及使用电池的用电装置。
用电装置可以是手机、便携式设备、笔记本电脑、电瓶车、电动汽车、轮船、航天器、电动玩具和电动工具等等，例如，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。
如图1所示，用电装置可以是车辆300，例如新能源汽车，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；或者用电装置也可以是无人机或轮船等。具体地，车辆300可包括车桥301、连接于车桥301的车轮302、马达303、控制器304和电池200，马达303用于驱动车桥301转动，控制器304用于控制马达303工作，电池200可以设置在车辆300的底部、头部或尾部，用于为马达303以及车辆中其它部件的工作提供电能。
如图2所示，电池200包括箱体201和电池单体100。在电池200中，电池单体100可以是一个，也可以是多个。若电池单体100为多个，多个电池单体100之间可串联或并联或混联，混联是指多个电池单体100中既有串联又有并联，可以是多个电池单体100先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体201内。也可以是所有电池单体100之间直接串联或并联或混联在一起，再将所有电池单体100构成的整体容纳于箱体201内。
箱体201内部中空，用于容纳一个或多个电池单体100，根据所容纳电池单体100的形状、数量、组合方式以及其他要求，箱体201也可以具有不同形状的尺寸。例如，箱体201可包括：容纳部201A、第一盖体201B和第二盖体201C，容纳部201A相对的两端均具有开口，第一盖体201B和第二盖体201C分别用于封闭容纳部201A的两端开口，图2中根据多个电池单体100的排列方式，容纳部201A呈矩形筒状结构。
电池单体100例如可以为锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离 子电池或镁离子电池等。
在一些实施例中，如图3和图4所示，电池单体100包括：壳体101、端盖组件102和电极组件10。
壳体101具有开口1011，端盖组件102用于封闭开口1011，端盖组件102包括端盖本体1021和绝缘连接于端盖本体1021的电极端子1022。
电极组件10设在壳体101内，如图5和图6所示，电极组件10包括：极性相反的第一极片1和第二极片2，第一极片1包括第一主体部11和凸出于第一主体部11的第一极耳12，第二极片2包括第二主体部21和凸出于第二主体部21的第二极耳22。第一极片1和第二极片2被配置为绕卷绕轴线K卷绕，以使第一主体部11和第二主体部21相叠加并形成卷绕主体S；卷绕主体S的一端包括第一导电区112和第二导电区113，第一极耳12在第一导电区112引出，第二极耳22在第二导电区113引出，相邻的第一导电区112和第二导电区113沿卷绕主体S的径向间隔设置。其中，第一极耳12与电极端子1022电连接，第二极耳22与端盖本体1021电连接。
其中，壳体101为中空结构，用于容纳电极组件10，且壳体101具有开口1011，端盖本体1021用于盖合开口1011。对于长方体的电池单体100，端盖本体1021呈矩形板状结构；对于圆柱形的电池单体100，端盖本体1021呈圆盘状结构。
电极端子1022绝缘连接于端盖本体1021可采用两种实现形式，例如，电极端子1022与端盖本体1021连接的部位涂覆绝缘层，或者电极端子1022包括导电部分和第二绝缘件1022C，第二绝缘件1022C设在导电部分与端盖本体1021之间起到绝缘作用。由于第一极耳12与电极端子1022电连接，第二极耳22与端盖本体1021电连接，端盖本体1021充当电极端子的作用，将电极端子1022与端盖本体1021绝缘连接，能够实现正负电极端子的绝缘，提高电池单体100工作的可靠性。此处的“电连接”包括直接连接和间接连接的情况。
电极组件10由极性相反的第一极片1和第二极片2卷绕形成，第一极片1和第二极片2的形状基本相同，可以是长条形带状结构，形成的卷绕主体S可以为圆柱体、扁平体、长方体或其它形状。第一主体部11和第二主体部21上可涂覆不同的活性物质，第一极耳12可设置一个，或者沿卷绕方向间隔设置多个，第二极耳22可设置一个，或者沿卷绕方向设置多个。例如，第一极片1为正极片，第二极片2为负极片；或者第一极片1为负极片，第二极片2为正极片。
在卷绕主体S的端部，相邻的第一导电区112和第二导电区113沿卷绕主体S的径向间隔设置，可使第一极耳12和第二极耳22在空间上隔开以避免短路，而且径向间隔 区域由于未设置极耳，可作为导液区，电解液能够从导液区浸润到卷绕主体S内部，以在电池充放电的过程中，使电解液与第一极片1和第二极片2上的活性物质充分发生反应。
为了实现电极组件10的绝缘，卷绕主体S与壳体101之间可设置绝缘膜103；第二极耳22的外侧可套设第一绝缘环105，其高度可与第二极耳22的引出长度一致；端盖组件102与电极组件10之间可设置第二绝缘环106，第二绝缘环106可采用塑胶制成。
该实施例将第一极耳12和第二极耳22从卷绕主体S的同一端引出，只需要在电极组件10的一端预留电连接空间，也省去了在电池单体100的两端分别设置电极端子1022，可有效提高电池单体100的整体能量密度，在电池单体100的容量一定的情况下，能够减小电池单体100的体积，使电池200在用电装置中更容易布局。
而且，此种电池单体100只设置一个电极端子1022，第一极耳12与电极端子1022电连接，第二极耳22直接与端盖本体1021电连接，可简化电池单体100的结构和装配工艺。通过省去一个电极端子，可在端盖本体1021上留出较大空间，易于在端盖本体1021上布局注液部件和泄压部件，也为布置温度采集部件、电池单体100间的汇流件和各类导线留出充裕的空间，也有利于增大电极端子1022的横截面积，以增加电池单体100的过流能力。对于端盖本体1021的面积较小时，此种设计具有更大的优势。
另外，第一极耳12和第二极耳22沿径向间隔设置，有利于增加第一极耳12和第二极耳22沿卷绕主体S周向的延伸尺寸，提高极耳与卷绕主体S的连接强度，使极耳根部具有较好的自支撑作用，在对极耳施加周向作用力揉平的过程中，减少极耳打皱现象，使揉平区域形状稳定，优化第一极耳12与电极端子1022、第二极耳22与端盖本体1021之间的电连接效果，保证电极组件10可靠地向外传输电能，并提高过流能力。且径向间隔区域既能将第一极耳12和第二极耳22在空间上隔开起到绝缘作用，又能使电解液从径向间隔区域浸润到卷绕主体S内部，保证电极组件13的浸润性能，提高吸液效果，以在电池充放电的过程中，使电解液与活性物质充分发生反应，从而优化电池单体100的性能。
在一些实施例中，如图6所示，第一导电区112位于第二导电区113的径向内侧。
该实施例能够使第一极耳12从卷绕主体S的中间区域引出，从而使电极端子1022位于端盖本体1021靠近中间区域的位置，留出周围的区域布局注液部件和泄压部件，也为布置温度采集部件、电池单体100间的汇流件和各类导线留出充裕的空间，也有利于增大电极端子1022的横截面积，以增加电池单体100的过流能力。可选地，第一导电区112位于第二导电区113的径向外侧。
在一些实施例中，卷绕主体S的端部还包括至少一个导液区111，其中一个导液区111沿卷绕主体S的径向位于相邻的第一导电区112和第二导电区113之间，用于引导 电解液流入卷绕主体S的内部。
导液区111未设置极耳，且第一极片1或第二极片2与隔膜3之间的间隙与电极组件10外部连通，使电解液更容易进入第一极片1或第二极片2与隔膜3之间的间隙流入卷绕主体S内部，隔膜3也能充分发挥吸液作用，以在电池充放电的过程中，使电解液与第一极片1和第二极片2上的活性物质充分发生反应。
该实施例通过在相邻的第一导电区112和第二导电区113之间设置导液区111，既能够将第一极耳12和第二极耳22在空间上隔开起到绝缘作用，又能使电解液从导液区111浸润到卷绕主体S的内部，保证电极组件10的浸润性能，提高吸液效果，以在电池充放电的过程中，使电解液与第一极片1和第二极片2上的活性物质充分发生反应，从而优化电池单体100的性能。
在一些实施例中，导液区111设有多个，卷绕主体S的端部具有多个沿径向间隔设置的第一导电区112，相邻第一导电区112之间设有导液区111；和/或卷绕主体S的端部具有多个沿径向间隔设置的第二导电区113，相邻第二导电区113之间设有导液区111。
该实施例通过沿径向间隔设置多个第一导电区112和/或第二导电区113，能够在保证极耳过流能力的基础上，更有利于提高电解液的浸润性能，电解液可以同时通过相邻第一导电区112和第二导电区113之间的导液区111、相邻第一导电区112之间的导液区111以及相邻第二导电区113之间的导液区111进入卷绕主体S内部，以在电池充放电的过程中，使电解液在卷绕主体S内部沿径向的分布更加均匀，由此电解液可与第一极片1和第二极片2上的活性物质充分发生反应，从而优化电池单体100的性能。
在一些实施例中，如图6所示，电极组件10还包括隔膜3，隔膜3用于隔离第一极片1和第二极片2，隔膜3、第一主体部11和第二主体部21卷绕后形成卷绕主体S；在卷绕轴线K的延伸方向上，隔膜3位于导液区111的部分超出第一主体部11和第二主体部21的侧边。
其中，隔膜3在展开的状态下可以为长条带状结构，隔膜3可采用PP(聚丙烯)材料或PE(聚乙烯)材料制成，其内部具有微米级或纳米级的微孔，用于在电池的充放电过程中供金属离子通过。
可选地，在卷绕轴线K的延伸方向上，隔膜3的一侧位于导液区111的部分超出第一主体部11的侧边和第二主体部21的侧边；或者隔膜3的两侧位于导液区111的部分均超出第一主体部11的侧边和第二主体部21的侧边。
该实施例将隔膜3在导液区111加宽，能够使隔膜3的侧边在导液区111在第一极片1和第二极片2之间向外伸出，并浸泡在电解液中，从而使隔膜3更容易在毛细作用下 吸取电解液，提高电极组件10的浸润性能，进而提升电池单体100的性能。
在一些实施例中，如图8所示，电极端子1022远离电极组件10的面设有第一凹槽1022’，第一凹槽1022’朝向靠近电极组件10的方向凹入，第一凹槽1022’底面与电极端子1022靠近电极组件10的表面之间形成第一焊接部W1，第一极耳12与第一焊接部W1焊接。
其中，第一凹槽1022’的形状和尺寸可根据焊接区域设置。例如，第一极耳12与电极端子1022可采用激光焊接。第一焊接部W1的厚度要保证焊接能量可穿透，以实现可靠固定。
该实施例通过在电极端子1022上设置第一凹槽1022’，减薄了电极端子1022在焊接区域的厚度，能够在端盖组件102安装于壳体101之后，直接从电极端子1022外侧进行焊接，简化了装配工艺，而且能够提高焊接的牢固性，以可靠地实现电极端子1022与第一极耳12的电连接。
在一些实施例中，如图7和图8所示，端盖本体1021远离电极组件10的侧面上设有第二凹槽1021’，第二凹槽1021’沿径向位于电极端子1022的外侧，第二极耳22与端盖本体1021上与第二凹槽1021’对应的位置连接。
其中，第二凹槽1021’底面与端盖本体1021靠近电极组件10的表面之间形成第二焊接部W2，第二极耳22与第二焊接部W2焊接。第二凹槽1021’的形状和尺寸可根据焊接区域设置。例如，第二极耳22与端盖本体1021可采用激光焊接。第二焊接部W2的厚度要保证焊接能量可穿透，以实现可靠固定。
可选地，端盖本体1021包括主体板1021A和凸出部1021B，凸出部1021B连接在主体板1021A靠近电极组件10一侧，第二凹槽1021’延伸至凸出部1021B内。凸出部1021B将主体板1021A在靠近电极组件10的一侧局部加厚，使第二焊接部W2在卷绕轴线K所在方向上更靠近第二极耳22，便于将第二极耳22与端盖本体1021直接单连接而省去转接件，简化了结构，还能减小第二极耳22的引出长度。而且，在主体板1021A局部加厚的情况下，通过使第二凹槽1021’延伸至凸出部1021B内，也能使第二焊接部W2保持在合适的焊接厚度，提高电连接可靠性。
该实施例通过在端盖本体1021上设置第二凹槽1021’，减薄了端盖本体1021在焊接区域的厚度，能够在端盖组件102安装于壳体101之后，直接从端盖本体1021外侧进行焊接，简化了装配工艺，而且能够提高焊接的牢固性，以可靠地实现端盖本体1021与第二极耳22的电连接。
而且，对于第一导电区112位于第二导电区113的径向内侧的结构，第二凹槽 1021’沿径向位于电极端子1022的外侧区域，有充裕的空间设置第二凹槽1021’，在第二导电区113沿周向延伸长度较长时，有利于通过增加第二凹槽1021’的数量或周向尺寸提高第二极耳22与端盖本体1021电连接可靠度。
在一些实施例中，如图7所示，第二凹槽1021’设有多个，且多个第二凹槽1021’沿卷绕主体S的周向间隔设置，每个第二凹槽1021’沿周向延伸。
例如，第二凹槽1021’设有两个，两个第二凹槽1021’可相对于卷绕轴线K对称设置。端盖组件102还可包括设在端盖本体1021上的注液部件和泄压部件1024，注液部件设在两个第二凹槽1021’各自的第一端之间，泄压部件1024设在两个第二凹槽1021’各自的第二端之间。具体地，注液部件可包括设在端盖本体1021上的通孔1021C和盖体1023，通孔1021C用于注入电解液，注入电解液后盖体1023将通孔1021C封闭，当移除盖体1023后可进行注液。泄压部件1024用于在壳体101的内部压力超过预设阈值时进行泄压。
该实施例在端盖本体1021上沿周向间隔设置多个第二凹槽1021’，不仅能够提高第二极耳22与端盖本体1021之间电连接可靠度，例如，在采用焊接实现电连接时，设置多个焊接位置可保证焊接强度，防止电池200在使用过程中受到振动和冲击时焊接位置发生松脱；而且还能在相邻两个第二凹槽1021’之间设置注液部件和泄压部件1024等其它部件，充分利用端盖本体1021上的空间。
在一些实施例中，如图9所示，电池单体100还包括转接件104，第一极耳12通过转接件104与电极端子1022电连接，和/或第二极耳22通过转接件104与端盖本体1021电连接。例如，可采用焊接或铆接的方式实现电连接。
例如，在采用焊接方式时，可先将第一极耳12和/或第二极耳22与转接件104焊接，在安装端盖组件102后，从端盖组件102外部将电极端子1022与转接件104电连接，并将端盖本体1021与转接件104电连接。
例如，转接件104包括：相互连接的第一连接部1041和第二连接部1042，第一连接部1041沿径向的尺寸大于第二连接部1042的尺寸。对于连接于第一极耳12与电极端子1022之间的转接件104，第一连接部1041与第一极耳12电连接，第二连接部1042与电极端子1022电连接；和/或对于连接于第二极耳22与端盖本体1021之间的转接件104，第一连接部1041与第二极耳22电连接，第二连接部1042与端盖本体1021连接。
例如，第一连接部1041可采用圆盘片状结构，可增大与第一极耳12或第二极耳22的连接面积，以提高连接可靠性，特别适用于第一极耳12卷绕至少一周的结构，可使第一极耳12在整个周向都与第一连接部1041连接。第二连接部1042可呈圆柱形结构， 圆柱形结构的一端可连接于第一连接部1041，例如处于第一连接部1044的中心位置，另一端与电极端子1022连接。考虑到电极端子1022尺寸较小，第一极耳12通过转接件104与电极端子1022电连接能够提高电能传输的可靠性。
通过使第一连接部1041沿径向的尺寸大于第二连接部1042的尺寸，能够使第一连接部1041在径向上覆盖第一极耳12或第二极耳22中更多的极耳层，增加第一连接部1041在径向上与第一极耳12或第二极耳22的连接长度，提高电连接可靠性，例如在采用焊接进行电连接时，可使焊接轨迹经过更多的极耳层，使第一连接部1041与极耳的连接更加牢固。而且，通过减小第二连接部1042的径向尺寸，可与电极端子1022或端盖本体1021的连接区域适配，从而适应电极端子1022较小的横截面积，并减小端盖本体1021上的电连接区域，以便为布局其它部件留出空间。
可选地，第一极耳12也可与电极端子1022直接电连接，第二极耳22也可与端盖本体1021直接电连接。第一极耳12和第二极耳22可根据连接需求确定是否需要设置转接件104。
该实施例通过设置转接件104，可降低对第一极耳12与电极端子1022、以及第二极耳22与端盖本体1021之间的位置关系的要求，从而降低了电连接的工艺难度；而且，由于多个极耳较为蓬松，通过转接件104更容易提高连接可靠性，以增加内外圈极耳的过流能力，例如，在采用焊接的方式进行电连接时，转接件104与极耳的焊接轨迹可控制，可提高焊接的牢固性；另外，还可防止在电连接时对极耳或卷绕主体S造成损伤，例如在采用焊接时，可防止焊接能量灼伤极耳、使卷绕主体S发生变形或第一主体部11、第二主体部21上的涂覆层发生脱落等。
在一些实施例中，第一极耳12至少卷绕一个整圈，和/或第二极耳22至少卷绕一个整圈。
该实施例使极耳连续延伸并卷绕至少一圈，在周向上与卷绕主体S具备较好的连接强度，使极耳根部具有较好的自支撑作用，在对极耳施加周向作用力揉平的过程中，防止出现极耳打皱现象，使揉平区域形状稳定，优化第一极耳12与电极端子1022以及第二极耳22与端盖本体1021的焊接效果，保证电极组件10可靠地向外传输电能，并提高过流能力。此外，极耳焊接时产生的粒子也不容易沿周向掉落到导液区111的第一极片1和第二极片2之间，可提高电极组件10工作的可靠性，防止出现短路或极片划伤的问题。
此外，通过在第一主体部11的部分卷绕长度上设置连续的第一极耳12，并在第二主体部21的部分卷绕长度上设置连续的第二极耳22，能够满足第一极耳12和第二极耳22的过流能力，无需在主体部的整个卷绕长度上设置离散极耳，可简化模切极片工序， 同时在第一极片1和第二极片卷绕形成卷绕主体S时，也无需进行极耳对位，可简化工艺，提升电极组件10的生产效率。
在一些实施例中，第一极耳12在第一导电区112卷绕多圈，和/或第二极耳22在第二导电区113卷绕多圈。第一极耳12或第二极耳22可卷绕至少两圈，例如为了使第一极耳12或第二极耳22达到较优的自支撑效果，卷绕圈数至少5圈，卷绕圈数可根据电极组件10的过流能力和极化进行设计。
该实施例通过使极耳在导电区卷绕多圈，揉平后极耳中相邻两个极耳层的弯折部相互搭接，进一步强化极耳受到的支撑作用，可防止极耳揉平打皱，使弯折部形状稳定，优化第一极耳12与电极端子1022以及第二极耳22与端盖本体1021之间的焊接效果。而且，还可增大极耳揉平后与电极端子1022或端盖本体1021之间的焊接面积，使第一极耳12与电极端子1022以及第二极耳22与端盖本体1021的焊接更牢固，保证电极组件10可靠地向外传输电能，并提高过流能力。
在一些实施例中，如图10所示，电池单体100还包括第一绝缘件107，第一绝缘件107的至少部分沿卷绕主体S的径向设在相邻的第一导电区112和第二导电区113之间。
例如，第一绝缘件107的截面可成L形结构，L形结构的横部与端盖本体1021连接，竖部延伸至第一极耳12与第二极耳22之间的区域内。
该实施例能够通过第一绝缘件107将第一极耳12和第二极耳22隔开，以防止第一极耳12和第二极耳22由于受到振动或冲击时发生接触短路，提高电池单体100的工作可靠性。
在一些实施例中，如图13所示，第一极片1沿卷绕方向间隔设置多个第一极耳12，多个第一极耳12形成至少一个第一极耳组12’，第一导电区112设有至少一个，第一极耳组12’与第一导电区112对应设置，第一极耳组12’沿卷绕主体S的部分周向延伸，且包括沿径向层叠设置的多个第一极耳12。和/或第二极片2沿卷绕方向间隔设置多个第二极耳22，多个第二极耳22形成至少一个第二极耳组22’，第二导电区113设有至少一个，第二极耳组22’与第二导电区113对应设置，第二极耳组22’沿卷绕主体S的部分周向延伸，且包括沿径向层叠设置的多个第二极耳22。
例如，第一导电区112设有两个，两个第一导电区112分别引出一个第一极耳组12’，且两个第一导电区112相对于卷绕轴线K对称设置；第二导电区113设有两个，两个第二导电区113分别引出一个第二极耳组22’，且两个第二极耳组22’相对于卷绕轴线K对称设置。第二导电区113可位于第一导电区112的径向外侧。
第一极耳组12’中多个第一极耳12沿卷绕方向的宽度相等；和/或第二极耳组13’ 中多个第二极耳22沿卷绕方向的宽度相等。极耳组呈类似矩形的结构，只是该矩形结构沿径向相对的两个侧边为圆弧形。极耳组中多个极耳相同的侧端对齐，以提高极耳组与电极端子1022或端盖本体1021电连接时的有效接触面积，提高过流能力。此种结构使极耳组中多个极耳的宽度相等，能够降低模切极耳的难度，易于保证极耳的尺寸，在卷绕时易于保证多个极耳的对齐程度，从而降低制备电极组件10的工艺难度。
可选地，第一极耳组12’和第二极耳组22’也可为扇形结构。
该实施例的极耳引出方式在保证电流传输能力的基础上，可减小电极组件10的重量，从而减小电池单体100的重量。
图3至图8为本申请电池单体100的第一实施例的结构示意图。如图3和图4，电池单体100包括壳体101、端盖组件102和电极组件10。壳体101具有开口1011，端盖组件102用于封闭开口1011，端盖组件102包括端盖本体1021和绝缘连接于端盖本体1021的电极端子1022，端盖本体1021用于盖合开口1011。例如，电池单体100可呈圆柱形。
电极组件10设在壳体101内，如图5所示，电极组件10呈卷绕结构且包括卷绕主体S、极性相反的第一极耳12和第二极耳22，卷绕主体S的一端同心设有环状的导液区111、第一导电区112和第二导电区113，导液区111在径向上位于第一导电区112和第二导电区113之间。第一极耳12从第一导电区112引出且卷绕至少一圈，第二极耳22从第二导电区113引出且卷绕至少一圈，例如卷绕5圈。
如图6所示，第一极片1包括第一主体部11和凸出于第一主体部11的第一极耳12，第二极片2包括第二主体部21和凸出于第二主体部21的第二极耳22，第一极片1、第二极片2和隔膜3被配置为绕卷绕轴线K卷绕，以使第一主体部11、第二主体部21和隔膜3叠加形成卷绕主体S。第一极耳12和第二极耳22沿卷绕轴线位于卷绕主体S的同一端，且第一极耳12和第二极耳22沿卷绕方向分别位于内端和外端。隔膜3位于导液区111部分的至少一个侧边可超出第一主体部11和第二主体部21。
如图7和图8所示，第一极耳12与电极端子1022电连接，且电极端子1022的中心线与卷绕轴线K重合，第二极耳22与端盖本体1021电连接。
电极端子1022可以设计为复合电极端子，其包括第一端子部1022A、第二端子部1022B和第二绝缘件1022C，第一端子部1022A和第二端子部1022B沿卷绕轴线K所在方向连接，第二端子部1022B位于第一端子部1022A和电极组件10之间，第二绝缘件1022C套设在第一端子部1022A和第二端子部1022B外。
例如，电极端子1022为负极端子，第一端子部1022A采用铝材料制成，且用于与电池单体100的外部电路连接；第二端子部1022B采用铜材料制成，可设计为盘状结构， 第二端子部1022B与第一极耳12直接电连接，例如可采用焊接等方式。第一端子部1022A上设置沿卷绕轴线K延伸的通孔，以在电极端子1022远离电极组件10的面形成第一凹槽1022’，并将第二端子部1022B与通孔对应的部分作为第一焊接部W1与第一极耳12焊接。
端盖本体1021远离电极组件10的面上设有第二凹槽1021’，第二凹槽1021’朝向靠近电极组件10的方向凹入，第二凹槽1021’底面与端盖本体1021靠近电极组件10的表面之间形成第二焊接部W2，第二极耳22与第二焊接部W2焊接。端盖本体1021包括主体板1021A和凸出部1021B，凸出部1021B连接在主体板1021A靠近电极组件10一侧，第二凹槽1021’延伸至凸出部1021B内。凸出部1021B凸出至与第二极耳组13抵接，通过第二凹槽1021’直接将第二焊接部W2与第二极耳22焊接，无需设置转接件104。
由于电极端子1022与卷绕主体S端面的距离大于凸出部1021B与卷绕主体S端面的距离，因此第一极耳12的延伸长度大于第二极耳22的延伸长度。
壳体101具有凹入部1012，凹入部1012在周向上相对于壳体11的外壁整体向内凹入，壳体101在凹入部1012靠近开口1011的一端形成弯折部1013，弯折部1013具有容纳腔，端盖本体1021沿径向的外端嵌入容纳腔，电池单体100还包括密封件109，密封件109设在弯折部1013与端盖本体1021之间。
其中，凹入部1012可沿壳体101的整个周向延伸，或者在壳体101的周向上间隔设置多个凹入部1012。密封件109可采用密封圈，且密封圈的横截面可呈C形结构，密封圈套设在端盖本体1021的外端，以使得端盖本体1021与壳体101绝缘。可选地，C形结构靠近电极组件10的一端可设置延伸部，延伸部沿着朝向电极组件10的方向延伸，以将凹入部1012与电池单体10的内部结构绝缘。例如，密封件109可采用橡胶等材料。
其中，在固定端盖组件102时，先将密封件109套设在端盖组件102沿径向的外端，并将端盖组件102从开口1011放入壳体101内，端盖组件102抵靠在凹入部1012上，再将壳体101在凹入部1012靠近开口1011的一端进行弯折，以形成弯折部1013，弯折部1013包裹在密封件109之外。通过采用镦封的方式实现端盖组件102与壳体101之间的固定，并设置密封件109，能实现端盖本体1021与壳体101之间的绝缘，这样在将端盖本体1021作为电极端子的情况下，可使壳体101不带电，提高了电池单体100工作的安全性。
图9为本申请电池单体100的第二实施例的示意图，与图8所示第一实施例的不同之处在于，第一极耳12和第二极耳22的引出长度相同，第一极耳12与电极端子1022通过转接件104电连接。转接件104包括：相互连接的第一连接部1041和第二连接部1042，第一连接部1041沿径向的尺寸大于第二连接部1042的尺寸。对于连接于第一极耳12与电极端子1022之间的转接件104，第一连接部1041与第一极耳12电连接，第二连接部 1042与电极端子1022电连接.
图10为本申请电池单体100的第三实施例的示意图，与图9所示第二实施例的不同之处在于，电池单体100还包括第一绝缘件107，第一绝缘件107的至少部分沿卷绕主体S的径向设在相邻的第一导电区112和第二导电区113之间，且第一绝缘件107与卷绕主体S的端面之间具有预设距离H。例如，第一绝缘件107的截面可成L形结构，L形结构的横部与端盖本体1021连接，竖部延伸至第一极耳12与第二极耳22之间的区域内，且与卷绕主体S的端面之间具有预设距离H。
图11为本申请电池单体100的第四实施例的示意图，与图8所示第一实施例的不同之处在于，将第二端子部1022B设计为使板状结构的局部区域朝向电极组件10凸出至能够与第一极耳12连接，以省去设置转接件104。
图12为本申请电池单体100的第五实施例的示意图，与图9所示第二实施例的不同之处在于，卷绕主体S位于卷绕中心的中空区域内设有中心管108，中心管108的一端与第一极耳12平齐，以便在放置转接件104与第一极耳12焊接时，可通过中心管108提供支撑力。
其次，本申请还提供了一种电池单体100的制造方法，在一些实施例中，如图14所示，制造方法包括：
S110、部件提供步骤：提供壳体101、端盖组件102以及极性相反的第一极片1和第二极片2；其中，壳体101具有开口1011，端盖组件102包括端盖本体1021和设在端盖本体1021上的电极端子1022，第一极片1包括第一主体部11和凸出于第一主体部11的第一极耳12，第二极片2包括第二主体部21和凸出于第二主体部21的第二极耳22；
S120、极片卷绕步骤：将第一极片1和第二极片2绕卷绕轴线K卷绕，以使第一主体部11和第二主体部21相叠加并形成卷绕主体S，卷绕主体S的一端包括第一导电区112和第二导电区113；第一极耳12在第一导电区112引出，第二极耳22在第二导电区113引出，相邻的第一导电区112和第二导电区113沿卷绕主体S的径向间隔设置；
S130、端盖安装步骤：将端盖组件102封闭开口1011，并将第一极耳12与电极端子1022电连接，第二极耳22与端盖本体1021电连接。
其中，S110-S130顺序执行。
该实施例将第一极耳12和第二极耳22从卷绕主体S的同一端引出，只需要在电极组件10的一端预留电连接空间，也省去了在电池单体100的两端分别设置电极端子1022，可有效提高电池单体100的整体能量密度，在电池单体100的容量一定的情况下，能够减小电池单体100的体积，使电池200在用电装置中更容易布局。
而且，此种电池单体100只设置一个电极端子1022，可简化电池单体100的结构和装配工艺。通过省去一个电极端子，可在端盖本体1021上留出较大空间，易于在端盖本体1021上布局注液部件和泄压部件1024，也为布置温度采集部件、电池单体100间的汇流件和各类导线留出充裕的空间，也有利于增大电极端子1022的横截面积，以增加电池单体100的过流能力。
另外，第一极耳12和第二极耳22沿径向间隔设置，有利于增加第一极耳12和第二极耳22沿卷绕主体S周向的延伸尺寸，提高极耳与卷绕主体S的连接强度，使极耳根部具有较好的自支撑作用，在对极耳施加周向作用力揉平的过程中，减少极耳打皱现象，使揉平区域形状稳定，优化第一极耳12与电极端子1022、第二极耳22与端盖本体1021之间的电连接效果，保证电极组件10可靠地向外传输电能，并提高过流能力。
最后，本申请还提供了一种电池单体100的制造装置400，在一些实施例中，如图15所示，制造装置400包括：部件提供设备410、极片卷绕设备420和端盖安装设备430。
部件提供设备410被配置为提供壳体101、端盖组件102以及极性相反的第一极片1和第二极片2；其中，壳体101具有开口1011，端盖组件102包括端盖本体1021和设在端盖本体1021上的电极端子1022，第一极片1包括第一主体部11和凸出于第一主体部11的第一极耳12，第二极片2包括第二主体部21和凸出于第二主体部21的第二极耳22。
极片卷绕设备420被配置为将第一极片1和第二极片2绕卷绕轴线K卷绕，以使第一主体部11和第二主体部21相叠加并形成卷绕主体S，卷绕主体S的一端包括第一导电区112和第二导电区113；第一极耳12在第一导电区112引出，第二极耳22在第二导电区113引出，相邻的第一导电区112和第二导电区113沿卷绕主体S的径向间隔设置。
端盖安装设备430被配置为将端盖组件102封闭开口1011，并将第一极耳12与电极端子1022电连接，第二极耳22与端盖本体1021电连接。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。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 (17)

  1. 一种电池单体(100)，包括：
    壳体(101)，具有开口(1011)；
    端盖组件(102)，用于封闭所述开口(1011)，所述端盖组件(102)包括端盖本体(1021)和设在所述端盖本体(1021)上的电极端子(1022)；和
    电极组件(10)，设在所述壳体(101)内且包括：极性相反的第一极片(1)和第二极片(2)，所述第一极片(1)包括第一主体部(11)和凸出于所述第一主体部(11)的第一极耳(12)，所述第二极片(2)包括第二主体部(21)和凸出于所述第二主体部(21)的第二极耳(22)，所述第一极片(1)和所述第二极片(2)被配置为绕卷绕轴线(K)卷绕，以使所述第一主体部(11)和所述第二主体部(21)相叠加并形成卷绕主体(S)；所述卷绕主体(S)的一端包括第一导电区(112)和第二导电区(113)，所述第一极耳(12)在所述第一导电区(112)引出，所述第二极耳(22)在所述第二导电区(113)引出，相邻的所述第一导电区(112)和所述第二导电区(113)沿所述卷绕主体(S)的径向间隔设置；
    其中，所述第一极耳(12)与所述电极端子(1022)电连接，所述第二极耳(22)与所述端盖本体(1021)电连接。
  2. 根据权利要求1所述的电池单体(100)，其中，所述第一导电区(112)位于所述第二导电区(113)的径向内侧。
  3. 根据权利要求1或2所述的电池单体(100)，其中，所述电极端子(1022)远离所述电极组件(10)的面设有第一凹槽(1022’)，所述第一凹槽(1022’)朝向靠近所述电极组件(10)的方向凹入，所述第一凹槽(1022’)底面与所述电极端子(1022)靠近所述电极组件(10)的表面之间形成第一焊接部(W1)，所述第一极耳(12)与所述第一焊接部(W1)焊接。
  4. 根据权利要求1～3任一项所述的电池单体(100)，其中，所述端盖本体(1021)远离所述电极组件(10)的面上设有第二凹槽(1021’)，所述第二凹槽(1021’)朝向靠近所述电极组件(10)的方向凹入，所述第二凹槽(1021’)底面与所述端盖本体(1021)靠近所述电极组件(10)的表面之间形成第二焊接部(W2)，所述第二极耳(22)与所述第二焊接部(W2)焊接。
  5. 根据权利要求4所述的电池单体(100)，其中，所述第二凹槽(1021’)设有多个，且多个所述第二凹槽(1021’)沿所述卷绕主体(S)的周向间隔设置。
  6. 根据权利要求1～5任一项所述的电池单体(100)，还包括转接件(104)，所述第一极耳(12)通过所述转接件(104)与所述电极端子(1022)电连接，和/或所述第二极耳(22)通过所述转接件(104)与所述端盖本体(1021)电连接。
  7. 根据权利要求1～6任一项所述的电池单体(100)，其中，所述第一极耳(12)至少卷绕一个整圈，和/或所述第二极耳(22)至少卷绕一个整圈。
  8. 根据权利要求1～7任一项所述的电池单体(100)，其中，所述第一极耳(12)在所述第一导电区(112)卷绕多圈，和/或所述第二极耳(22)在所述第二导电区(113)卷绕多圈。
  9. 根据权利要求1～6任一项所述的电池单体(100)，其中，
    所述第一极片(1)沿卷绕方向间隔设置多个所述第一极耳(12)，多个所述第一极耳(12)形成至少一个第一极耳组(12’)，所述第一导电区(112)设有至少一个，所述第一极耳组(12’)与所述第一导电区(112)对应设置，所述第一极耳组(12’)沿所述卷绕主体(S)的部分周向延伸，且包括沿径向层叠设置的多个所述第一极耳(12)；和/或
    所述第二极片(2)沿卷绕方向间隔设置多个所述第二极耳(22)，多个所述第二极耳(22)形成至少一个第二极耳组(22’)，所述第二导电区(113)设有至少一个，所述第二极耳组(22’)与所述第二导电区(113)对应设置，所述第二极耳组(22’)沿所述卷绕主体(S)的部分周向延伸，且包括沿径向层叠设置的多个所述第二极耳(22)。
  10. 根据权利要求1～9任一项所述的电池单体(100)，其中，所述卷绕主体(S)的端部还包括至少一个导液区(111)，其中一个所述导液区(111)沿所述卷绕主体(S)的径向位于相邻的所述第一导电区(112)和第二导电区(113)之间，用于引导电解液流入所述卷绕主体(S)的内部。
  11. 根据权利要求10所述的电池单体(100)，其中，所述导液区(111)设有多个，
    所述卷绕主体(S)的端部具有多个沿径向间隔设置的所述第一导电区(112)，相邻所述第一导电区(112)之间设有所述导液区(111)；和/或
    所述卷绕主体(S)的端部具有多个沿径向间隔设置的所述第二导电区(113)，相邻所述第二导电区(113)之间设有所述导液区(111)。
  12. 根据权利要求10或11所述的电池单体(100)，其中，所述电极组件(10)还包括隔膜(3)，所述隔膜(3)用于隔离所述第一极片(1)和第二极片(2)，所述隔膜(3)、所述第一主体部(11)和所述第二主体部(21)卷绕后形成所述卷绕主体(S)；
    在所述卷绕轴线(K)的延伸方向上，所述隔膜(3)位于导液区(111)的部分超出 所述第一主体部(11)和所述第二主体部(21)的侧边。
  13. 根据权利要求1～12任一项所述的电池单体(100)，还包括第一绝缘件(107)，所述第一绝缘件(107)的至少部分沿所述卷绕主体(S)的径向设在相邻的所述第一导电区(112)和第二导电区(113)之间。
  14. 一种电池(200)，包括：
    根据权利要求1～13任一项所述的电池单体(100)；以及
    箱体(201)，用于容纳所述电池单体(100)。
  15. 一种用电装置，包括权利要求14所述的电池(200)，所述电池(200)用于为所述用电装置提供电能。
  16. 一种电池单体(100)的制造方法，包括：
    部件提供步骤：提供壳体(101)、端盖组件(102)以及极性相反的第一极片(1)和第二极片(2)；其中，所述壳体(101)具有开口(1011)，所述端盖组件(102)包括端盖本体(1021)和设在所述端盖本体(1021)上的电极端子(1022)，所述第一极片(1)包括第一主体部(11)和凸出于所述第一主体部(11)的第一极耳(12)，所述第二极片(2)包括第二主体部(21)和凸出于所述第二主体部(21)的第二极耳(22)；
    极片卷绕步骤：将所述第一极片(1)和所述第二极片(2)绕卷绕轴线(K)卷绕，以使所述第一主体部(11)和所述第二主体部(21)相叠加并形成卷绕主体(S)，所述卷绕主体(S)的一端包括第一导电区(112)和第二导电区(113)；所述第一极耳(12)在所述第一导电区(112)引出，所述第二极耳(22)在所述第二导电区(113)引出，相邻的所述第一导电区(112)和所述第二导电区(113)沿所述卷绕主体(S)的径向间隔设置；
    端盖安装步骤：将所述端盖组件(102)封闭所述开口(1011)，并将所述第一极耳(12)与所述电极端子(1022)电连接，所述第二极耳(22)与所述端盖本体(1021)电连接。
  17. 一种电池单体(100)的制造装置(400)，包括：
    部件提供设备(410)，被配置为提供壳体(101)、端盖组件(102)以及极性相反的第一极片(1)和第二极片(2)；其中，所述壳体(101)具有开口(1011)，所述端盖组件(102)包括端盖本体(1021)和设在所述端盖本体(1021)上的电极端子(1022)，所述第一极片(1)包括第一主体部(11)和凸出于所述第一主体部(11)的第一极耳(12)，所述第二极片(2)包括第二主体部(21)和凸出于所述第二主体部(21)的第二极耳(22)；
    极片卷绕设备(420)，被配置为将所述第一极片(1)和所述第二极片(2)绕卷绕轴线(K)卷绕，以使所述第一主体部(11)和所述第二主体部(21)相叠加并形成卷绕主体(S)，所述卷绕主体(S)的一端包括第一导电区(112)和第二导电区(113)；所述第一极耳(12)在所述第一导电区(112)引出，所述第二极耳(22)在所述第二导电区(113)引出，相邻的所述第一导电区(112)和所述第二导电区(113)沿所述卷绕主体(S)的径向间隔设置；和
    端盖安装设备(430)，被配置为将所述端盖组件(102)封闭所述开口(1011)，并将所述第一极耳(12)与所述电极端子(1022)电连接，所述第二极耳(22)与所述端盖本体(1021)电连接。
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116666776A (zh) * 2023-08-01 2023-08-29 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
CN116914278A (zh) * 2023-09-14 2023-10-20 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
CN116936952A (zh) * 2023-09-14 2023-10-24 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
CN116936953A (zh) * 2023-09-14 2023-10-24 宁德时代新能源科技股份有限公司 电极组件、电池单体、电池及用电装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102856514A (zh) * 2011-06-28 2013-01-02 比亚迪股份有限公司 一种盖板组件和含有该盖板组件的锂离子电池
CN112310574A (zh) * 2020-09-30 2021-02-02 宁德时代新能源科技股份有限公司 圆柱型电池单体、电池、用电装置、制造方法及制造系统
CN113258224A (zh) * 2021-06-07 2021-08-13 江苏时代新能源科技有限公司 电池单体、电池、用电设备、电池单体的制造方法及设备
CN214254642U (zh) * 2020-12-31 2021-09-21 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池、用电设备和电池单体的制造设备
US20210328313A1 (en) * 2020-04-17 2021-10-21 Contemporary Amperex Technology Co., Limited End cover assembly, battery cell, battery module and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102856514A (zh) * 2011-06-28 2013-01-02 比亚迪股份有限公司 一种盖板组件和含有该盖板组件的锂离子电池
US20210328313A1 (en) * 2020-04-17 2021-10-21 Contemporary Amperex Technology Co., Limited End cover assembly, battery cell, battery module and device
CN112310574A (zh) * 2020-09-30 2021-02-02 宁德时代新能源科技股份有限公司 圆柱型电池单体、电池、用电装置、制造方法及制造系统
CN214254642U (zh) * 2020-12-31 2021-09-21 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池、用电设备和电池单体的制造设备
CN113258224A (zh) * 2021-06-07 2021-08-13 江苏时代新能源科技有限公司 电池单体、电池、用电设备、电池单体的制造方法及设备

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116666776A (zh) * 2023-08-01 2023-08-29 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
CN116666776B (zh) * 2023-08-01 2023-11-21 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
CN116914278A (zh) * 2023-09-14 2023-10-20 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
CN116936952A (zh) * 2023-09-14 2023-10-24 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
CN116936953A (zh) * 2023-09-14 2023-10-24 宁德时代新能源科技股份有限公司 电极组件、电池单体、电池及用电装置
CN116914278B (zh) * 2023-09-14 2024-02-23 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
CN116936953B (zh) * 2023-09-14 2024-02-23 宁德时代新能源科技股份有限公司 电极组件、电池单体、电池及用电装置

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