WO2023134487A1 - 电池单体及其制造方法和制造系统、电池以及用电装置 - Google Patents

电池单体及其制造方法和制造系统、电池以及用电装置 Download PDF

Info

Publication number
WO2023134487A1
WO2023134487A1 PCT/CN2022/144342 CN2022144342W WO2023134487A1 WO 2023134487 A1 WO2023134487 A1 WO 2023134487A1 CN 2022144342 W CN2022144342 W CN 2022144342W WO 2023134487 A1 WO2023134487 A1 WO 2023134487A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
electrode assembly
assembly
pressurizing
battery
Prior art date
Application number
PCT/CN2022/144342
Other languages
English (en)
French (fr)
Inventor
羿庄城
黄彩虾
唐鸣浩
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.)
Filing date
Publication date
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 CN202290000293.1U priority Critical patent/CN221352843U/zh
Publication of WO2023134487A1 publication Critical patent/WO2023134487A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, in particular to a battery cell, a manufacturing method and system thereof, a battery, and an electrical device.
  • Battery cells are widely used in electronic equipment, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.
  • the present application provides a battery cell, its manufacturing method and manufacturing system, a battery and an electrical device, aiming at improving the performance and safety of the battery cell.
  • a first aspect of the present application provides a battery cell, which includes a casing, an electrode assembly and a pressurizing assembly.
  • the electrode assembly is housed in the case.
  • a pressurizing assembly is housed in the case and disposed around the periphery of the electrode assembly, the pressurizing assembly being configured to deform when the internal temperature of the battery cell reaches a threshold to constrain the electrode assembly.
  • the pressurized assembly deforms and constrains the electrode assembly to discharge the gas in the electrode assembly, reducing the gas accumulated in the electrode assembly; during the charging and discharging process, lithium
  • the ions can migrate smoothly to the negative electrode sheet, which can avoid the occurrence of lithium precipitation and other phenomena to a certain extent, so as to ensure the cycle performance and charge-discharge capacity of the battery cell.
  • the gas can be discharged in time, and the pressure in the battery cell can be released in time, which can prevent the battery cell from expanding to a certain extent, reduce the occupied volume of the battery cell and improve the safety performance of the battery cell.
  • the outer surface of the electrode assembly includes two first faces disposed opposite to each other along a first direction and two second faces disposed opposite to each other along a second direction, the second face connects the two first faces, and the first The area of the surface is larger than the area of the second surface, and the first direction is perpendicular to the second direction; at least the part of the pressurized assembly opposite to the second surface can shrink when the internal temperature of the battery cell reaches a threshold value. In the embodiment of the present application, at least part of the compression of the pressurized assembly can cause the electrode assembly to shrink inward, so as to discharge the gas in the electrode assembly.
  • the pressurization assembly includes a deformation portion and two pressurization portions.
  • the deformation part is provided at least on the outer periphery of the second surface, and the deformation part is configured to contract when the internal temperature of the battery cell reaches a threshold value.
  • the two pressing parts are arranged opposite to each other along the first direction, and the two pressing parts are respectively arranged on the outer peripheries of the two first surfaces.
  • the deformation part connects the two pressing parts. Driven by the deformation part, the two first surfaces are restrained inwardly.
  • a pressurizing part is provided on the first surface, and when the deformation part shrinks, it drives the pressurizing part to move toward the first surface of the electrode assembly, and the two first surfaces are respectively restrained by the pressurizing part, thereby Make the electrode assembly shrink inward and discharge the gas inside; and can ensure the effective use of battery cells.
  • the deformation part connects the ends of the two pressing parts.
  • the deformation part when the deformation part shrinks, the deformation part can drive both ends of the pressing part to move towards the electrode assembly,
  • the deformation portion is disposed around the periphery of the electrode assembly, and the pressing portion is disposed between the deformation portion and the first surface.
  • the deformed portion shrinks inwardly, the deformed portion exerts a pressing force on the pressing portion, and the pressing portion moves toward the first surface of the electrode assembly.
  • the edge of the pressing portion protrudes beyond the first surface.
  • the deformation part drives the pressure part to move toward the first surface, it can ensure that the pressure part covers the first surface of the electrode assembly, and the first surface is constrained and squeezed by the entire surface, which is beneficial to improve the exhaust effect.
  • the pressing portion protrudes toward a direction away from the electrode assembly.
  • the pressurizing part is an arc-shaped structure. When the deformed part shrinks and deforms, it applies tensile stress to the end of the arc-shaped structure, and the arc-shaped structure moves toward the first surface of the electrode assembly and applies extrusion force to the electrode assembly.
  • the deformation part is made of shape memory material, shape memory material includes shape memory alloy, shape memory polymer or shape memory ceramic; and/or the pressing part is made of non-shape memory material, non-shape memory material At least one of polyimide, polyphenylene ether resin, polyether ether ketone, polypropylene and polyethylene is included.
  • the shape memory material has a shape memory effect.
  • the deformation part can be deformed and restored to its original shape, and the deformation part can be deformed and tightened to drive the pressurized part toward the electrode. Components move.
  • the pressurizing portion is made of a non-shape memory material including at least one of polyimide, polyphenylene ether resin, polyether ether ketone, polypropylene, and polyethylene.
  • the pressurizing part when the temperature inside the battery cell reaches a threshold value, the pressurizing part will not deform substantially, which is beneficial for the pressurizing part to exert a restraining force on the electrode assembly.
  • the electrode assembly is a cylindrical structure
  • the pressurizing assembly is configured to contract along the circumference of the cylindrical structure when the internal temperature of the battery cell reaches a threshold value.
  • the pressurizing assembly shrinks along the circumferential direction, and the contraction degree of each part of the pressurizing assembly is basically the same, and the electrode assembly can be constrained radially to discharge the gas in the electrode assembly.
  • the pressurization component is made of a shape memory material.
  • the shape memory material has a shape memory effect, and when the temperature changes, the pressurized component can deform and return to its original shape, and apply a radial extrusion force to the electrode component, which is beneficial to the internal exhaust of the electrode component.
  • the pressurization component includes a through hole, and the through hole penetrates the pressurization component along a thickness direction of the pressurization component.
  • the through holes provided in the pressurized component can improve the wetting performance of the electrolyte on the electrode component, and can increase the energy density of the battery cell.
  • a plurality of through holes are provided, and the plurality of through holes are arranged in an array.
  • the array arrangement can further improve the uniformity of electrolyte infiltration to the electrode assembly.
  • the second aspect of the present application provides a battery, including the battery cell provided in any embodiment of the first aspect of the present application.
  • the third aspect of the present application provides an electric device, including the battery according to the embodiment of the second aspect of the present application, and the battery is used to provide electric energy.
  • the fourth aspect of the present application provides a method for manufacturing a battery cell, including: providing an electrode assembly and a pressurization assembly, the pressurization assembly is arranged around the periphery of the electrode assembly, and the pressurization assembly is configured to reach the temperature of the internal temperature of the battery cell. deforming at a threshold value to constrain the electrode assembly; providing a casing to accommodate the electrode assembly and the pressurizing assembly in the casing.
  • the fifth aspect of the present application provides a battery cell manufacturing system, including: a first providing device for providing an electrode assembly and a pressurization assembly, the pressurization assembly is arranged around the periphery of the electrode assembly, and the pressurization assembly is configured to When the internal temperature of the battery cell reaches a threshold value, it is deformed to constrain the electrode assembly; the second providing device is used to provide a casing, and accommodate the electrode assembly and the pressurized assembly in the casing.
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Fig. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • Fig. 3 is a schematic diagram of a partial structure of a battery module provided by some embodiments of the present application.
  • Fig. 4 is an exploded schematic diagram of a battery cell provided by some embodiments of the present application.
  • Fig. 5 is an exploded schematic diagram of an electrode assembly and a pressurizing assembly of a battery cell provided by some embodiments of the present application;
  • Fig. 6 is an exploded schematic diagram of an electrode assembly and a pressurizing assembly of a battery cell provided by another embodiment of the present application;
  • Fig. 7 is a schematic structural view of a pressurized assembly of a battery cell provided by some embodiments of the present application.
  • Fig. 8 is a schematic structural diagram of a battery cell provided by another embodiment of the present application.
  • Fig. 9 is an exploded schematic view of the electrode assembly and the pressurizing assembly of the battery cell shown in Fig. 8;
  • Fig. 10 is a schematic flowchart of a method for manufacturing an electrode assembly provided by some embodiments of the present application.
  • Fig. 11 is a schematic block diagram of an electrode assembly manufacturing system provided by some embodiments of the present application.
  • Electrode assembly 710, outer surface; 710a, first surface; 710b, second surface;
  • Manufacturing system 100. First providing device; 200. Second providing device.
  • connection In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installation”, “connection”, “connection” and “attachment” should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are for illustrative purposes only, and should not constitute any limitation to the application .
  • “Plurality” in this application refers to two or more (including two).
  • the battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, and other lithium-ion battery cells, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive pole piece, a negative pole piece and a separator.
  • the battery cells mainly rely on the movement of lithium ions between the positive and negative pole pieces to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode current collector and a positive electrode lug protruding from the positive electrode current collector. part is coated with a positive electrode active material layer, and at least part of the positive electrode tab is not coated with a positive electrode active material layer.
  • the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes the positive electrode active material, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collector and a negative electrode tab protruding from the negative electrode current collector, and the negative electrode current collector part is coated with a negative electrode active material layer, and at least part of the negative electrode tab is not coated with a negative electrode active material layer.
  • the material of the negative electrode current collector may be copper, the negative electrode active material layer includes the negative electrode active material, and the negative electrode active material may be carbon or silicon.
  • the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
  • the material of the spacer can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • the battery cell may also include a casing assembly, and the casing assembly has an accommodating chamber inside, and the accommodating chamber is a closed space provided by the casing assembly for the electrode assembly and the electrolyte.
  • the casing assembly includes a casing and an end cap assembly.
  • the casing is a hollow structure with one side open.
  • the end cap assembly covers the opening of the casing and forms a sealed connection to form an accommodating cavity for accommodating the electrode assembly and the electrolyte.
  • the solvent in the electrolyte solution decomposes, and the decomposed solvent molecules react with electrons and lithium ions to form a passivation film on the surface of the negative electrode active material layer, that is, a solid electrolyte interphase film (Solid Electrolyte Interphase, SEI film) , and a certain amount of gas will be produced.
  • a solid electrolyte interphase film Solid Electrolyte Interphase, SEI film
  • the gas will cause the internal pressure of the battery cell to increase, causing the battery cell to expand and increase the occupied volume of the battery cell; and the gas will block the lithium ion transmission path, and the lithium ion cannot migrate smoothly to the negative electrode sheet, resulting in analyses. Lithium and dark spots. And due to the phenomenon of lithium analysis, the lithium ions migrated to the negative electrode sheet are reduced, so the charging capacity of the battery cell is reduced; the lithium ions that are extracted from the negative electrode sheet and returned to the positive electrode sheet are reduced, and the discharge capacity of the battery cell is reduced; and the battery The cycle performance of the monomer will also be deteriorated.
  • the battery cell includes a case, an electrode assembly, and a pressurizing assembly.
  • the electrode assembly is housed in the case.
  • a pressurizing assembly is housed in the case and disposed around the periphery of the electrode assembly, the pressurizing assembly being configured to deform when the internal temperature of the battery cell reaches a threshold to constrain the electrode assembly.
  • the pressurized assembly can deform and restrain the electrode assembly, so that the gas in the electrode assembly can be discharged, lithium ions can migrate smoothly, and the cycle performance and charge-discharge capacity of the battery cell can be guaranteed.
  • Electric devices can be vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric toys and electric tools, and so on.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles;
  • spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.;
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.;
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
  • the embodiments of the present application do not impose special limitations on the above-mentioned electrical devices.
  • the electric device is taken as an example for description.
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • a battery 2 is arranged inside the vehicle 1 , and the battery 2 can be arranged at the bottom, head or tail of the vehicle 1 .
  • the battery 2 can be used for power supply of the vehicle 1 , for example, the battery 2 can be used as an operating power source of the vehicle 1 .
  • the vehicle 1 may also include a controller 3 and a motor 4 , the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.
  • the battery 2 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 to provide driving power for the vehicle 1 instead of or partially replacing fuel oil or natural gas.
  • Fig. 2 is an exploded schematic diagram of a battery provided by some embodiments of the present application.
  • the battery 2 includes a box body 5 and a battery cell (not shown in FIG. 2 ), and the battery cell is accommodated in the box body 5 .
  • the box body 5 is used to accommodate the battery cells, and the box body 5 may have various structures.
  • the box body 5 may include a first box body part 51 and a second box body part 52, the first box body part 51 and the second box body part 52 cover each other, the first box body part 51 and the second box body part 51
  • the two box parts 52 jointly define an accommodating space 53 for accommodating the battery cells.
  • the second box part 52 can be a hollow structure with one end open, the first box part 51 is a plate-shaped structure, and the first box part 51 covers the opening side of the second box part 52 to form an accommodating space 53
  • the box body 5; the first box body portion 51 and the second box body portion 52 also can be a hollow structure with one side opening, and the opening side of the first box body portion 51 is covered on the opening side of the second box body portion 52 , to form a box body 5 with an accommodation space 53 .
  • the first box body part 51 and the second box body part 52 can be in various shapes, such as a cylinder, a cuboid, and the like.
  • a sealing member may also be provided between the first box body portion 51 and the second box body portion 52, such as sealant, sealing ring, etc. .
  • the first box part 51 can also be referred to as an upper box cover, and the second box part 52 can also be called a lower box.
  • the battery 2 there may be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel or in parallel.
  • the hybrid connection means that there are both series and parallel connections among the multiple battery cells.
  • a plurality of battery cells can be directly connected in series or in parallel or mixed together, and then the whole composed of a plurality of battery cells is accommodated in the box 5; of course, it is also possible to first connect a plurality of battery cells in series or parallel or
  • the battery modules 6 are formed by parallel connection, and multiple battery modules 6 are connected in series or in parallel or in series to form a whole, and are housed in the box body 5 .
  • Fig. 3 is a schematic diagram of a partial structure of a battery module provided by some embodiments of the present application. As shown in FIG. 3 , in some embodiments, there are multiple battery cells, and the multiple battery cells are connected in series, in parallel, or in parallel to form a battery module 6 . A plurality of battery modules 6 are connected in series, in parallel or in parallel to form a whole, and accommodated in the box.
  • a plurality of battery cells in the battery module 6 can be electrically connected through a confluence component, so as to realize parallel connection, series connection or mixed connection of the plurality of battery cells in the battery module 6 .
  • Fig. 4 is an exploded schematic diagram of a battery cell provided by some embodiments of the present application
  • Fig. 5 is an exploded schematic diagram of an electrode assembly and a pressurized assembly of a battery cell provided by some embodiments of the present application.
  • the battery cell 7 provided by the embodiment of the present application includes a casing 72 , an electrode assembly 71 and a pressurizing assembly 73 .
  • the electrode assembly 71 is accommodated in a case 72 .
  • the pressurizing assembly 73 is accommodated in the casing 72 and is disposed around the outer circumference of the electrode assembly 71 , and is configured to deform when the internal temperature of the battery cell 7 reaches a threshold value so as to constrain the electrode assembly 71 .
  • the housing 72 can be in various shapes, such as cylinder, cuboid and so on.
  • the shape of the casing 72 may be determined according to the specific shape of the electrode assembly 71 . For example, if the electrode assembly 71 has a cylindrical structure, a cylindrical shell can be selected; if the electrode assembly 71 has a rectangular parallelepiped structure, a rectangular parallelepiped shell can be selected.
  • the battery cell 7 there may be one electrode assembly 71 accommodated in the casing 72 or a plurality thereof. Exemplarily, in FIG. 4 , there is one electrode assembly 71 .
  • the electrode assembly 71 includes a positive pole piece, a negative pole piece and a separator.
  • the electrode assembly 71 may be a wound electrode assembly, a laminated electrode assembly or other forms of electrode assemblies.
  • the electrode assembly 71 is a wound electrode assembly.
  • the positive pole piece, the negative pole piece and the separator are all strip-shaped structures.
  • the positive pole piece, the separator, and the negative pole piece can be stacked sequentially and wound more than two times to form the electrode assembly 71 .
  • the electrode assembly 71 is a laminated electrode assembly.
  • the electrode assembly 71 includes a plurality of positive electrode sheets and a plurality of negative electrode sheets, the positive electrode sheets and the negative electrode sheets are alternately stacked, and the stacking direction is parallel to the thickness direction of the positive electrode sheet and the thickness direction of the negative electrode sheet.
  • the electrode assembly 71 includes a main body 711 and a tab 712 connected to the main body 711 .
  • the tab portion 712 extends from an end of the main body portion 711 close to the end cap assembly 74 of the battery cell 7 .
  • the end cover assembly 74 is used to cover the opening of the casing 72 and form a sealed connection, so as to form a receiving chamber for accommodating the electrode assembly 71 .
  • the two tabs 712 are respectively defined as a positive tab and a negative tab.
  • the positive pole tab and the negative pole tab may extend from the same end of the main body 711 , or may extend from opposite ends of the main body 711 respectively.
  • the main body part 711 is the core part of the electrode assembly 71 to realize the charging and discharging function, and the tab part 712 is used to lead out the current generated by the main body part 711 .
  • the main body part 711 includes a positive current collector of a positive current collector, a positive active material layer, a negative current collector of a negative current collector, a negative active material layer, and a separator.
  • the positive pole tab part includes a plurality of positive pole tabs
  • the negative pole tab part includes a plurality of negative pole tabs.
  • the tab portion 712 is used to electrically connect to the electrode terminal.
  • the tab portion 712 may be directly connected to the electrode terminal by means of welding or the like, or may be indirectly connected to the electrode terminal through other components.
  • the battery cell 7 further includes a current collecting member for electrically connecting the electrode terminal and the tab portion 712 .
  • There are two current collecting members the two current collecting members are respectively defined as a positive current collecting member and a negative current collecting member, the positive current collecting member is used to electrically connect the positive electrode terminal and the positive electrode ear, and the negative current collecting member is used for electrical connection Negative pole terminal and negative pole lug.
  • the pressurizing component 73 can deform when the internal temperature of the battery cell 7 reaches a threshold value, exerting pressure on the electrode component 71, the electrode component 71 is subjected to a restraining force, and the gap between the positive pole piece, the separator and the negative pole piece is reduced, and lithium
  • the reduced ion transmission distance can increase the migration rate of lithium ions; and the gas inside the electrode assembly 71 can be squeezed out.
  • the gas in the embodiment of the present application, during the formation of the battery cell 7 into gas, the gas accumulates in the electrode assembly 71, and the pressurizing assembly 73 deforms and constrains the electrode assembly 71 so that the gas in the electrode assembly 71 can be discharged to reduce the accumulation of gas in the electrode assembly.
  • the gas in the module; during the charge and discharge process, lithium ions can migrate smoothly to the negative electrode sheet, which can avoid the occurrence of lithium precipitation and other phenomena to a certain extent, so as to ensure the cycle performance and charge and discharge capacity of the battery cell 7.
  • the gas can be discharged in time, and the pressure in the battery cell 7 can be released in time, which can prevent the battery cell 7 from expanding to a certain extent, reduce the occupied volume of the battery cell 7 and improve the safety performance of the battery cell 7 .
  • the electrode assembly 71 can be in various shapes. Taking the electrode assembly 71 as a cuboid structure as an example, the outer surface 710 of the electrode assembly 71 includes two first surfaces 710a oppositely arranged along the first direction X and two first surfaces 710a oppositely arranged along the second direction Y. Two second sides 710b. The second surface 710b connects the two first surfaces 710a, and the area of the first surface 710a is larger than that of the second surface 710b.
  • the first direction X is perpendicular to the second direction Y.
  • the outer surface 710 of the electrode assembly 71 is a circumferential surface.
  • the pressurizing component 73 can be made of insulating material or non-insulating material.
  • a Mylar structure Mylar may also be provided between the pressurizing assembly 73 and the electrode assembly 71 to separate the pressurizing assembly 73 and the electrode assembly 71, and reduce the risk of the pressurizing assembly 73 damaging the electrode assembly 71, The risk of short circuit between the pressurizing component 73 and the electrode component 71 is reduced to a certain extent.
  • At least the part of the pressurizing assembly 73 opposite to the second surface 710b can be pressed when the internal temperature of the battery cell 7 reaches a threshold shrink.
  • the at least partial contraction of the pressurizing component 73 can cause the electrode component 71 to contract inward, so as to discharge the gas in the electrode component 71 .
  • the pressurizing component 73 includes a deformation part 731 and two pressurizing parts 732 .
  • the deformation part 731 is provided at least on the outer periphery of the second surface 710b, and the deformation part 731 is configured to contract when the internal temperature of the battery cell 7 reaches a threshold value.
  • the two pressing portions 732 are disposed opposite to each other along the first direction X, and the two pressing portions 732 are respectively disposed on the outer peripheries of the two first surfaces 710a.
  • the deformation part 731 connects the two pressing parts 732 , and the pressing part 732 is configured to constrain the two first surfaces 710 a inwardly driven by the deformation part 731 when the deformation part 731 contracts.
  • the pressing part 732 is provided on the first surface 710a.
  • the pressing part 732 is driven to move toward the first surface 710a of the electrode assembly 71, and the two first surfaces 710a are respectively pressed.
  • the binding force of the pressure portion 732 makes the electrode assembly 71 shrink inward and discharge the gas inside; and can ensure the effective use of the battery cell 7 .
  • the deformation part 731 connects the ends 7321 of the two pressing parts 732 .
  • the deformation part 731 may be provided in two.
  • the two deformation portions 731 are respectively disposed on the outer periphery of the second surface 710b, that is, opposite to the second surface 710b.
  • the deforming part 731 can drive both ends of the pressing part 732 to move toward the electrode assembly 71 , thereby constraining the first surface 710 a of the electrode assembly 71 .
  • Fig. 6 is an exploded schematic diagram of an electrode assembly and a pressurizing assembly of a battery cell provided by other embodiments of the present application.
  • the deformation portion 731 is disposed around the periphery of the electrode assembly 71 , and the pressing portion 732 is disposed between the deformation portion 731 and the first surface 710a.
  • the deformation part 731 shrinks inwardly, and the deformation part 731 gives a pressing force to the pressing part 732, and the pressing part 732 moves toward the first surface 710a of the electrode assembly 71, thereby constraining The first surface 710 a of the electrode assembly 71 .
  • the deformation part 731 has shrinkage deformation capability.
  • the deformation part 731 may be made of a shape memory material, for example, the shape memory material includes a shape memory alloy, a shape memory polymer or a shape memory ceramic.
  • the shape-memory material has a shape-memory effect. At room temperature, for example, about 25°C, the shape-memory material basically does not deform. When the temperature inside the battery cell 7 rises, for example, at 45°C, the deformed portion 731 can deform and return to its original shape. The part 731 is deformed and tightened and can drive the pressing part 732 to move towards the electrode assembly 71 .
  • the temperature inside the battery cell 7 rises, and the deformation of the deformation part 731 drives the pressing part 732 to move toward the direction of the electrode assembly 71, so as to squeeze the positive electrode piece, the separator and the negative electrode in the electrode assembly 71. sheet, so that the gap between the positive pole piece, the separator and the negative pole piece is reduced, the lithium ion migration path is shortened, and the lithium ion migration efficiency is improved; and it can ensure that the interface in the battery cell 7 reacts uniformly, ensuring that the battery cell 7 Electrochemical performance of long-term cycle.
  • the shape memory alloy includes titanium-nickel alloy, gold-cadmium alloy or copper-zinc alloy.
  • the shape memory polymer includes at least one of cross-linked polyolefin, trans-isoprene, polystyrene-butadiene copolymer, and polyepoxy resin.
  • Shape memory ceramics include zirconia ceramics and the like. The above is only an exemplary description of the memory material, and other memory materials known in the art may also be used in addition to the above examples.
  • the shape and structure of the pressurizing part 732 basically does not change, or its deformation degree is smaller than that of the deformation part 731 .
  • the pressurizing portion 732 is made of a non-shape memory material including at least one of polyimide, polyphenylene ether resin, polyether ether ketone, polypropylene, and polyethylene. This type of material has high temperature resistance and certain strength. When the temperature inside the battery cell 7 reaches a threshold value, the pressing part 732 will not deform substantially, which is beneficial for the pressing part 732 to exert a restraining force on the electrode assembly 71 .
  • the pressing part 732 and the deforming part 731 can be connected by bonding, perforating or sewing, and the specific connection method can be flexibly selected according to the material or process requirements of the two, and the connection method is not limited here.
  • the edge of the pressing part 732 exceeds the first surface 710a, and when the deformation part 731 drives the pressing part 732 to move toward the first surface 710a, it can ensure that the pressing part 732 covers the electrode assembly
  • the first surface 710a of the electrode assembly 71, the first surface 710a is constrained and extruded by the entire surface, which is beneficial to improve the exhaust effect; and can ensure the flatness and uniformity of the interface reaction in the electrode assembly 71 .
  • the pressing portion 732 protrudes toward a direction away from the electrode assembly 71 , in other words, the pressing portion 732 has an arc-shaped structure.
  • the deforming part 731 shrinks and deforms, it applies tensile stress to the end 7321 of the arc-shaped structure, and the arc-shaped structure moves toward the first surface 710a of the electrode assembly 71 and exerts a compressive force on the electrode assembly 71, thereby compressing the electrode assembly 71. constraint.
  • FIG. 7 is a schematic structural view of a pressurization assembly of a battery cell provided in some embodiments of the present application; as shown in FIG.
  • the thickness direction of the slit passes through the pressurizing assembly 73 .
  • the setting of the through hole 733 can reduce the weight of the battery cell on the one hand, thereby improving the energy density of the battery cell; on the other hand, it is beneficial for the electrolyte to infiltrate the electrode assembly through the through hole 733 to improve the uniformity of the electrode assembly.
  • a plurality of through holes 733 may be provided, and the plurality of through holes 733 are arranged in an array or non-uniformly arranged.
  • the array arrangement can further improve the uniformity of electrolyte infiltration to the electrode assembly.
  • the through hole 733 is disposed on the deforming portion 731 and/or the pressing portion 732 .
  • FIG. 8 is a schematic structural view of a battery cell provided by another embodiment of the present application
  • FIG. 9 is an exploded schematic view of an electrode assembly and a pressurizing assembly of the battery cell shown in FIG. 8 .
  • the pressurizing assembly 73 shrinks along the circumferential direction, and the contraction degree of each part of the pressurizing assembly 73 is basically the same, so that the electrode assembly 71 can be constrained in the radial direction of the electrode assembly 71 to squeeze out the gas in the electrode assembly 71 .
  • the pressing component 73 has shrinkage deformation capability.
  • the pressurizing assembly 73 can be made of a shape memory material, such as a shape memory alloy, a shape memory polymer, or a shape memory ceramic, for example.
  • the shape memory material has a shape memory effect.
  • the pressurized component 73 can be deformed and restored to its original shape, exerting a radial extrusion force on the electrode component 71, which is beneficial to the internal exhaust of the electrode component 71 .
  • the shape memory alloy includes titanium-nickel alloy, gold-cadmium alloy or copper-zinc alloy.
  • the shape memory polymer includes at least one of cross-linked polyolefin, trans-isoprene, polystyrene-butadiene copolymer, and polyepoxy resin.
  • Shape memory ceramics include zirconia ceramics and the like. The above is only an exemplary description of the memory material, and other memory materials known in the art may also be used in addition to the above examples.
  • the pressurizing assembly 73 further includes a through hole, and the through hole penetrates the pressurizing assembly 73 along the thickness direction of the pressing assembly 73 .
  • the setting of the through hole can reduce the weight of the battery cell 7 on the one hand, thereby improving the energy density of the battery cell 7;
  • a plurality of through holes may be provided, and the plurality of through holes may be arranged in an array or arranged non-uniformly.
  • the array arrangement can further improve the uniformity of the electrolytic solution infiltrating the electrode assembly 71 .
  • the embodiment of the present application also provides a method for manufacturing a battery cell.
  • Fig. 10 is a schematic flowchart of a method for manufacturing an electrode assembly provided in some embodiments of the present application. As shown in Fig. 10, the method includes:
  • the pressurization assembly is arranged around the periphery of the electrode assembly, and the pressurization assembly is configured to deform when the internal temperature of the battery cell reaches a threshold value, so as to constrain the electrode assembly;
  • the embodiment of the present application also provides a battery cell manufacturing system, which can execute the above manufacturing method.
  • Fig. 11 is a schematic block diagram of an electrode assembly manufacturing system provided by some embodiments of the present application. As shown in Fig. 11, the manufacturing system 1000 includes:
  • the first providing device 100 is used to provide an electrode assembly and a pressing assembly, the pressing assembly is arranged around the periphery of the electrode assembly, and the pressing assembly is configured to deform when the internal temperature of the battery cell reaches a threshold value, so as to constrain the electrode assembly;
  • the second providing device 200 is used to provide a casing, and accommodate the electrode assembly and the pressurizing assembly in the casing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请实施例涉及一种电池单体及其制造方法和制造系统、电池以及用电装置。该电池单体包括壳体、电极组件和加压组件。电极组件容纳于壳体内。加压组件容纳于壳体内，且加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件。本申请实施例的加压组件能够改善电池单体的循环性能和安全性能。

Description

电池单体及其制造方法和制造系统、电池以及用电装置
相关申请的交叉引用
本申请要求享有于2022年01月11日提交的名称为“电池单体及其制造方法和制造系统、电池以及用电装置”的中国专利申请202210025782.9的优先权，该申请的全部内容通过引用并入本文中。
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制造系统、电池以及用电装置。
背景技术
电池单体广泛用于电子设备，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。
在电池单体技术的发展中，除了提高电池的电化学性能外，安全问题也是一个不可忽视的问题。因此如何提高电池单体的电化学性能和安全问题是本领域亟待解决的问题。
发明内容
本申请提供了一种电池单体及其制造方法和制造系统、电池以及用电装置，旨在提高电池单体的性能和安全性能。
本申请第一方面提出了电池单体，该电池单体包括壳体、电极组件和加压组件。电极组件容纳于壳体内。加压组件容纳于壳体内，且加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件。
在本申请实施例中，在电池单体化成产气过程中，加压组件变形并约束电极组件以使电极组件内的气体排出，减少积聚于电极组件内的气体；在充放电过程中，锂离子能够顺畅迁移至负极极片，能够在一定程度上避免析锂等现象的发生，以此保证电池单体的循环性能和充放电容量。气体能够及时排出，电池单体内的压力能够及时泄放，能够在一定程度上防止电池单体膨胀，降低了电池单体的占用体积并能够改善电池单体的安全性能。
在一些实施例中，电极组件的外表面包括沿第一方向相对设置的两个第一面和沿第二方向相对设置的两个第二面，第二面连接两个第一面，第一面的面积大于第二面的面积，第一方向和第二方向垂直；加压组件的至少与第二面相对的部分能够在电池单体的内部温度达到阈值时收缩。在本申请实施例中，加压组件的至少部分收缩，能够使电极组件向内收缩，以将电极组件内的气体排出。
在一些实施例中，加压组件包括变形部和两个加压部。变形部至少设置于第二面的外周，变形部被配置为在电池单体的内部温度达到阈值时收缩。两个加压部沿第一方向相对设置，两个加压部分别设置于两个第一面的外周，变形部连接两个加压部，加压部被配置为在变形部收缩时，在变形部带动下向内约束两个第一面。在本申请实施例中，在第一面设置加压部，变形部收缩时带动加压部朝向电极组件的第一面的方向移动，两个第一面分别受到加压部的约束力，从而使得电极组件向内收缩并排出其内部的气体；并且能够保证电池单体的有效使用。
在一些实施例中，变形部连接两个加压部的端部。在本申请实施例中，变形部收缩时，变形部能够带动加压部的两端朝向电极组件移动，
在一些实施例中，变形部环绕电极组件的外周设置，加压部设置于变形部和第一面之间。在本申请实施例中，变形部向内收缩，变形部给与加压部挤压力，加压部朝向电极组件的第一面移动。
在一些实施例中，在第二方向上，加压部的边缘超出第一面。在本申请实施例中，变形部带动加压部朝向第一面移动时，能够保证加压部覆盖电极组件的第一面，第一面被整面约束挤压，有利于提高排气效果。
在一些实施例中，加压部朝向背离电极组件的方向凸出。在本申请实施例中，加压部为弧形结构。变形部收缩变形时，给与弧形结构的端部以拉应力，弧形结构朝向电极组件的第一面移动并给与电极组件以挤压力。
在一些实施例中，变形部由形状记忆材料制成，形状记忆材料包括形状记忆合金、形状记忆聚合物或形状记忆陶瓷；和/或加压部由非形状记忆材料制成，非形状记忆材料包括聚酰亚胺、聚苯醚树脂、聚醚醚酮、聚丙烯和聚乙烯中的至少一种。
在本申请实施例中，形状记忆材料具有形状记忆效应，在电池单体内部的温度升高达到阈值时，变形部能够变形恢复原有形状，变形部变形缩紧并能够带动加压部朝向电极组件移动。
在一些实施例中，加压部由非形状记忆材料制成，非形状记忆材料包括聚酰亚胺、聚苯醚树脂、聚醚醚酮、聚丙烯和聚乙烯中的至少一种。在本申请实施例中，在电池单体内部的温度达到阈值时，加压部基本不会发生变形，有利于加压部对电极组件施加约束力。
在一些实施例中，电极组件为圆柱状结构，加压组件被配置为在电池单体的内部温度达到阈值时沿圆柱状结构的周向收缩。在本申请实施例中，加压组件沿周向收缩，且加压组件的各部分收缩程度基本一致，能够沿径向约束电极组件，以将电极组件内的气体排出。
在一些实施例中，加压组件由形状记忆材料制成。
在本申请实施例中，形状记忆材料具有形状记忆效应，在温度发生变化时加压组件能够变形恢复原有形状，对电极组件施加径向挤压力，有利于电极组件内部排气。
在一些实施例中，加压组件包括通孔，通孔沿加压组件的厚度方向贯通加压组件。在本申请实施例中，加压组件设置通孔能够提高电解液对电极组件的浸润性能，且能够提高电池单体的能量密度。
在一些实施例中，通孔设置为多个，多个通孔阵列排布。在本申请实施例中，阵列排布能够进一步提高电解液对电极组件浸润的均一性。
本申请第二方面提供了一种电池，包括本申请第一方面任一实施例提供的电池单体。
本申请第三方面提供了一种用电装置，包括本申请第二方面实施例的电池，电池用于提供电能。
本申请第四方面提供了一种电池单体的制造方法，包括：提供电极组件和加压组件，加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件；提供壳体，将电极组件和加压组件容纳于壳体内。
本申请第五方面提供了一种电池单体的制造系统，包括：第一提供装置，用于提供电极组件和加压组件，加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件；第二提供装置，用于提供壳体，将电极组件和加压组件容纳于壳体内。
附图说明
下面将参考附图来描述本申请示例性实施例的特征、优点和技术效果。
图1是本申请一些实施例提供的车辆的结构示意图；
图2是本申请一些实施例提供的电池的分解示意图；
图3是本申请一些实施例提供的电池模块的局部结构示意图；
图4是本申请一些实施例提供的电池单体的爆炸示意图；
图5是本申请一些实施例提供的电池单体的电极组件和加压组件的分解示意图；
图6是本申请另一些实施例提供的电池单体的电极组件和加压组件的分解示意图；
图7是本申请一些实施例提供的电池单体的加压组件的结构示意图；
图8是本申请另一些实施例提供的电池单体的结构示意图；
图9是图8所示的电池单体的电极组件和加压组件的分解示意图；
图10是本申请一些实施例提供的电极组件的制造方法的流程示意图；
图11是本申请一些实施例提供的电极组件的制造系统的示意性框图。
在附图中，附图未必按照实际的比例绘制。
其中，图中各附图标记：
X、第一方向；Y、第二方向；
1、车辆；2、电池；3、控制器；4、马达；5、箱体；51、第一箱体部；52、第二箱体部；53、容纳空间；6、电池模块；7、电池单体；
71、电极组件；710、外表面；710a、第一面；710b、第二面；
711、主体部；712、极耳部；
72、壳体；
73、加压组件；731、变形部；732、加压部；7321、端部；
733、通孔；
74、端盖组件；
1000、制造系统；100、第一提供装置；200、第二提供装置。
具体实施方式
使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体等锂离子电池单体，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。
电池单体包括电极组件和电解液，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠锂离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和凸出于正极集流部的正极极耳，正极集流部涂覆有正极活性物质层，正极极耳的至少部分未涂覆正极活性物质层。正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和凸出于负极集流部的负极极耳，负极集流部涂覆有负极活性物质层，负极极耳的至少部分未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
电池单体还可以包括外壳组件，外壳组件内部具有容纳腔，该容纳腔是外壳组件为电极组件和电解液提供的密闭空间。外壳组件包括壳体和端盖组件，壳体为一侧开口的空心结构，端盖组件盖合于壳体的开口处并形成密封连接，以形成用于容纳电极组件和电解液的容纳腔。
发明人发现，锂离子电池单体在生产过程中，需要经过电池化成工序，即利用化学和电化学反应激活电极组件上的活性物质，使之转化成具有电化学特性的正负极。在化成过程中电解液中的溶剂分解，分解后的溶剂分子与电子、锂离子发生化学反应，在负极活性物质层表面形成一层钝化薄膜即固体电解质界面膜(Solid Electrolyte Interphase，SEI膜)，并且会产生一定量的气体。气体会造成电池单体内部的压力增大，使得电池单体膨胀，增加了电池单体的占用体积；且气体会阻隔锂离子传输路径，锂离子不能顺畅迁移至负极极片，进而导致出现析锂和黑斑现象。并且由于析锂现象导致迁移至负极极片的锂离子减少，因此电池单体的充电容量降低；由负极极片脱出回至正极极片的锂离子减少，电池单体的放电容量降低；并且电池单体的循环性能也会变差。
鉴于此，发明人对电池单体的结构进行了改进，提出了一种电池单体。该电池单体包括壳体、电极组件和加压组件。电极组件容纳于壳体内。加压组件容纳于壳体内，且加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件。在电池单体化成产气时，加压组件能够变形约束电极组件，以使电极组件内的气体排出，锂离子能够顺畅迁移，可以保证电池单体的循环性能和充放电容量。
本申请实施例描述的技术方案适用于包含电池单体的电池以及使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
以下实施例为了方便说明，以用电装置为车辆为例进行说明。
图1是本申请一些实施例提供的车辆的结构示意图。如图1所示，车辆1的内部设置有电池2，电池2可以设置在车辆1的底部或头部或尾部。电池2可以用于车辆1的供电，例如，电池2可以作为车辆1的操作电源。
车辆1还可以包括控制器3和马达4，控制器3用来控制电池2为马达4供电，例如，用于车辆1的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池2不仅仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，代替或部分地代替燃油或天然气为车辆1提供驱动动力。
图2是本申请一些实施例提供的电池的分解示意图。如图2所示，电池2包括箱体5和电池单体(图2未示出)，电池单体容纳于箱体5内。
箱体5用于容纳电池单体，箱体5可以是多种结构。在一些实施例中，箱体5可以包括第一箱体部51和第二箱体部52，第一箱体部51与第二箱体部52相互盖合，第一箱体部51和第二箱体部52共同限定出用于容纳电池单体的容纳空间53。第二箱体部52可以是一端开口的空心结构，第一箱体部51为板状结构，第一箱体部51盖合于第二箱体部52的开口侧，以形成具有容纳空间53的箱体5；第一箱体部51和第二箱体部52也均可以是一侧开口的空心结构，第一箱体部51的开口侧盖合于第二箱体部52的开口侧，以形成具有容纳空间53的箱体5。当然，第一箱体部51和第二箱体部52可以是多种形状，比如，圆柱体、长方体等。
为提高第一箱体部51与第二箱体部52连接后的密封性，第一箱体部51与第二箱体部52之间也可以设置密封件，比如，密封胶、密封圈等。
假设第一箱体部51盖合于第二箱体部52的顶部，第一箱体部51亦可称之为 上箱盖，第二箱体部52亦可称之为下箱体。
在电池2中，电池单体可以是一个，也可以是多个。若电池单体为多个，多个电池单体之间可串联或并联或混联，混联是指多个电池单体中既有串联又有并联。多个电池单体之间可直接串联或并联或混联在一起，再将多个电池单体构成的整体容纳于箱体5内；当然，也可以是多个电池单体先串联或并联或混联组成电池模块6，多个电池模块6再串联或并联或混联形成一个整体，并容纳于箱体5内。
图3是本申请一些实施例提供的电池模块的局部结构示意图。如图3所示，在一些实施例中，电池单体为多个，多个电池单体先串联或并联或混联组成电池模块6。多个电池模块6再串联或并联或混联形成一个整体，并容纳于箱体内。
电池模块6中的多个电池单体之间可通过汇流部件实现电连接，以实现电池模块6中的多个电池单体的并联或串联或混联。
图4是本申请一些实施例提供的电池单体的爆炸示意图，图5是本申请一些实施例提供的电池单体的电极组件和加压组件的分解示意图。
如图4和图5所示，本申请实施例提供的电池单体7包括壳体72、电极组件71和加压组件73。电极组件71容纳于壳体72内。加压组件73容纳于壳体72内，且加压组件73环绕电极组件71的外周设置，加压组件73被配置为在电池单体7的内部温度达到阈值时变形，以约束电极组件71。
壳体72可以是多种形状，比如，圆柱体、长方体等。壳体72的形状可根据电极组件71的具体形状来确定。比如，若电极组件71为圆柱状结构，则可选用为圆柱体壳体；若电极组件71为长方体结构，则可选用长方体壳体。
在电池单体7中，容纳于壳体72内的电极组件71可以为一个，也可以为多个。示例性的，在图4中，电极组件71为一个。
电极组件71包括正极极片、负极极片和隔离件。电极组件71可以是卷绕式电极组件、叠片式电极组件或其它形式的电极组件。
在一些实施例中，电极组件71为卷绕式电极组件。正极极片、负极极片和隔离件均为带状结构。本申请实施例可以将正极极片、隔离件以及负极极片依次层叠并卷绕两圈以上形成电极组件71。
在另一些实施例中，电极组件71为叠片式电极组件。具体地，电极组件71包括多个正极极片和多个负极极片，正极极片和负极极片交替层叠，层叠的方向平行于正极极片的厚度方向和负极极片的厚度方向。
从电极组件71的外形来看，电极组件71包括主体部711和连接于主体部711的极耳部712。示例性地，极耳部712从主体部711的靠近电池单体7的端盖组件74的一端延伸出。其中，端盖组件74用于盖合壳体72的开口处并形成密封连接，以形成用于容纳电极组件71的容纳腔。
在一些实施例中，极耳部712为两个，两个极耳部712分别定义为正极极耳部和负极极耳部。正极极耳部和负极极耳部可以从主体部711的同一端延伸出，也可以分别从主体部711的相反的两端延伸出。
主体部711为电极组件71实现充放电功能的核心部分，极耳部712用于将主体部711产生的电流引出。主体部711包括正极集流体的正极集流部、正极活性物质层、负极集流体的负极集流部、负极活性物质层以及隔离件。正极极耳部包括多个正极极耳，负极极耳部包括多个负极极耳。
极耳部712用于电连接于电极端子。极耳部712可以通过焊接等方式直接连接于电极端子，也可以通过其它构件间接地连接于电极端子。例如，电池单体7还包括集流构件，集流构件用于电连接电极端子和极耳部712。集流构件为两个，两个集流构件分别定义为正极集流构件和负极集流构件，正极集流构件用于电连接正极电极端子和正极极耳部，负极集流构件用于电连接负极电极端子和负极极耳部。
加压组件73在电池单体7的内部温度达到阈值时能够变形，对电极组件71施加压力，电极组件71受到约束力，正极极片、隔离件和负极极片之间的间隙减小，锂离子传输距离减小，能够提高锂离子迁移速率；并且能够将电极组件71内部的气体挤压排出。
在本申请实施例中，在电池单体7化成产气过程中，气体积聚于电极组件71内，加压组件73变形并约束电极组件71以使电极组件71内的气体排出，减少积聚于电极组件内的气体；在充放电过程中，锂离子能够顺畅迁移至负极极片，能够在一定程度上避免析锂等现象的发生，以此保证电池单体7的循环性能和充放电容量。气体能够及时排出，电池单体7内的压力能够及时泄放，能够在一定程度上防止电池单体7膨胀，降低了电池单体7的占用体积并能够改善电池单体7的安全性能。
电极组件71可以是多种形状，以电极组件71为长方体结构为例，电极组件71的外表面710包括沿第一方向X相对设置的两个第一面710a和沿第二方向Y相对设置的两个第二面710b。第二面710b连接两个第一面710a，第一面710a的面积大于第二面710b的面积。第一方向X和第二方向Y垂直。以电极组件71为圆柱状结构为例，电极组件71的外表面710为圆周面。
加压组件73可采用绝缘材质或非绝缘材质。在本申请实施例中，加压组件73和电极组件71之间还可设置麦拉结构Mylar，以隔开加压组件73和电极组件71，并降低加压组件73损伤电极组件71的风险，在一定程度上降低加压组件73和电极组件71短路的风险。
请继续参阅图4和图5，为了约束长方体结构的电极组件71，在一些实施例中，加压组件73的至少与第二面710b相对的部分能够在电池单体7的内部温度达到阈值时收缩。加压组件73的至少部分收缩，能够使电极组件71向内收缩，以将电极组件71内的气体排出。
可选地，加压组件73包括变形部731和两个加压部732。变形部731至少设置于第二面710b的外周，变形部731被配置为在电池单体7的内部温度达到阈值时收缩。两个加压部732沿第一方向X相对设置，两个加压部732分别设置于两个第一面710a的外周。变形部731连接两个加压部732，加压部732被配置为在变形部731收缩时，在变形部731带动下向内约束两个第一面710a。
发明人发现，如果将变形部设置于长方体结构的电极组件的外周，而不设置加压部，则变形部向内收缩变形时，可能会导致长方体结构的电极组件的各部分的受力不均衡，从而导致电极组件被挤压破坏，电池单体失效。
在本申请实施例中，在第一面710a设置加压部732，变形部731收缩时带动加压部732朝向电极组件71的第一面710a的方向移动，两个第一面710a分别受到加压部732的约束力，从而使得电极组件71向内收缩并排出其内部的气体；并且能够保证电池单体7的有效使用。
请继续参阅图5，作为一些示例，变形部731连接两个加压部732的端部7321。变形部731可设置为两个。两个变形部731分别设置于第二面710b的外周，即与第二面710b相对设置。两个变形部731收缩时，变形部731能够带动加压部732的两端朝向电极组件71移动，以此约束电极组件71的第一面710a。
图6是本申请另一些实施例提供的电池单体的电极组件和加压组件的分解示意图。
如图6所示，作为另一些示例，变形部731环绕电极组件71的外周设置，加压部732设置于变形部731和第一面710a之间。在电池单体7内部的温度达到阈值时，变形部731向内收缩，变形部731给与加压部732挤压力，加压部732朝向电极组件71的第一面710a移动，以此约束电极组件71的第一面710a。
变形部731具有收缩变形能力。在一些实施例中，变形部731可以由形状记忆材料制成，例如，形状记忆材料包括形状记忆合金、形状记忆聚合物或形状记忆陶瓷。形状记忆材料具有形状记忆效应，在常温例如25℃左右下，形状记忆材料基本不发生形变，在电池单体7内部的温度升高时例如45℃，变形部731能够变形恢复原有形状，变形部731变形缩紧并能够带动加压部732朝向电极组件71移动。
在充放电过程中，电池单体7内部的温度升高，变形部731变形带动加压部732朝向电极组件71的方向移动，以挤压电极组件71中的正极极片、隔离件和负极极片，使得正极极片、隔离件和负极极片之间的间隙减小，锂离子迁移路径缩短，提高锂离子迁移效率；并且能够保证电池单体7内的界面均匀发生反应，保证电池单体7长期循环的电化学性能。
示例性地，形状记忆合金包括钛镍合金、金镉合金或铜锌合金。形状记忆聚合物包括交联聚烯烃、反式异戊二烯、聚苯乙烯-丁二烯共聚物和聚环氧树脂中的至少一种。形状记忆陶瓷包括氧化锆陶瓷等。上述仅为记忆材料的示例性说明，除上述示例外，也可采用其他本领域公知的记忆材料。
加压部732在电池单体7内部的温度达到阈值时，其外形结构基本不会发生变化，或者其变形程度相对于变形部731的变形程度较小。在一些实施例中，加压部732由非形状记忆材料制成，非形状记忆材料包括聚酰亚胺、聚苯醚树脂、聚醚醚酮、聚丙烯和聚乙烯中的至少一种。此类材料具有耐高温特性，且具有一定的强度，在电池单体7内部的温度达到阈值时，加压部732基本不会发生变形，有利于加压部732对电极组件71施加约束力。
加压部732和变形部731之间可以通过粘接、穿孔或者缝制等方式连接，具体的连接方式可以根据二者的材质或工艺要求进行灵活选择，在此并不对连接方式进行限定。
在一些实施例中，在第二方向Y上，加压部732的边缘超出第一面710a，变形部731带动加压部732朝向第一面710a移动时，能够保证加压部732覆盖电极组件71的第一面710a，第一面710a被整面约束挤压，有利于提高排气效果；并且能够保证电极组件71内的界面反应的平整度和均匀性。
在一些实施例中，加压部732朝向背离电极组件71的方向凸出，换句话说，加压部732为弧形结构。变形部731收缩变形时，给与弧形结构的端部7321以拉应力，弧形结构朝向电极组件71的第一面710a移动并给与电极组件71以挤压力，从而对电极组件71进行约束。
图7是本申请一些实施例提供的电池单体的加压组件的结构示意图；如图7所示，在一些实施例中，加压组件73包括通孔733，通孔733沿加压组件73的厚度方向贯通加压组件73。通孔733的设置，一方面能够将电池单体轻量化，从而改善电池单体的能量密度；另一方面有利于电解液通过通孔733浸润电极组件，提高电极组件的浸润均匀性。
可选地，通孔733可设置为多个，多个通孔733阵列排布或非均匀设置。阵列排布能够进一步提高电解液对电极组件浸润的均一性。
作为一些示例，通孔733设置于变形部731和/或加压部732。
图8是本申请另一些实施例提供的电池单体的结构示意图；图9是图8所示的电池单体的电极组件和加压组件的分解示意图。
为了约束圆柱状结构的电极组件71，如图8和图9所示，在一些实施例中，加压组件73被配置为在电池单体7的内部温度达到阈值时沿圆柱状结构的周向收缩。加压组件73沿周向收缩，且加压组件73的各部分收缩程度基本一致，能够在电极组件71的径向约束电极组件71，以将电极组件71内的气体挤压排出。
加压组件73具有收缩变形能力。在一些实施例中，加压组件73可以由形状记忆材料制成，例如，形状记忆材料包括形状记忆合金、形状记忆聚合物或形状记忆陶瓷。形状记忆材料具有形状记忆效应，在温度发生变化时加压组件73能够变形恢复原有形状，对电极组件71施加径向挤压力，有利于电极组件71内部排气。
示例性地，形状记忆合金包括钛镍合金、金镉合金或铜锌合金。形状记忆聚合物包括交联聚烯烃、反式异戊二烯、聚苯乙烯-丁二烯共聚物和聚环氧树脂中的至少一种。形状记忆陶瓷包括氧化锆陶瓷等。上述仅为记忆材料的示例性说明，除上述示例外，也可采用其他本领域公知的记忆材料。
为了提高电解液对圆柱状的电极组件71的浸润性能，在一些实施例中，加压组件73还包括通孔，通孔沿加压组件73的厚度方向贯通加压组件73。通孔的设置，一方面能够将电池单体7轻量化，从而改善电池单体7的能量密度；另一方面有利于电解液通过通孔浸润电极组件71，提高电极组件71的浸润均匀性。
可选地，通孔可设置为多个，多个通孔阵列排布或非均匀设置。阵列排布能够进一步提高电解液对电极组件71浸润的均一性。
本申请实施例还提供了一种电池单体的制造方法。
图10是本申请一些实施例提供的电极组件的制造方法的流程示意图，如图10所示，该方法包括：
S100，提供电极组件和加压组件，加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件；
S200，提供壳体，将电极组件和加压组件容纳于壳体内。
本申请实施例还提供了一种电池单体的制造系统，该制造系统能够执行上述制造方法。
图11是本申请一些实施例提供的电极组件的制造系统的示意性框图，如图11所示，该制造系统1000包括：
第一提供装置100，用于提供电极组件和加压组件，加压组件环绕电极组件的外周设置，加压组件被配置为在电池单体的内部温度达到阈值时变形，以约束电极组件；
第二提供装置200，用于提供壳体，将电极组件和加压组件容纳于壳体内。
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 (16)

  1. 一种电池单体，包括：
    壳体；
    电极组件，容纳于所述壳体内；以及
    加压组件，容纳于所述壳体内，且所述加压组件环绕所述电极组件的外周设置，所述加压组件被配置为在所述电池单体的内部温度达到阈值时变形，以约束所述电极组件。
  2. 根据权利要求1所述的电池单体，其中，
    所述电极组件的外表面包括沿第一方向相对设置的两个第一面和沿第二方向相对设置的两个第二面，所述第二面连接两个所述第一面，所述第一面的面积大于所述第二面的面积，所述第一方向和所述第二方向垂直；
    所述加压组件的至少与所述第二面相对的部分能够在所述电池单体的内部温度达到所述阈值时收缩。
  3. 根据权利要求2所述的电池单体，其中，所述加压组件包括：
    变形部，变形部至少设置于所述第二面的外周，所述变形部被配置为在所述电池单体的内部温度达到所述阈值时收缩；以及
    沿所述第一方向相对设置的两个加压部，两个所述加压部分别设置于两个所述第一面的外周，所述变形部连接两个所述加压部，所述加压部被配置为在所述变形部收缩时，在所述变形部带动下向内约束两个所述第一面。
  4. 根据权利要求3所述的电池单体，其中，所述变形部连接两个所述加压部的端部。
  5. 根据权利要求3所述的电池单体，其中，所述变形部环绕所述电极组件的外周设置，所述加压部设置于所述变形部和所述第一面之间。
  6. 根据权利要求3所述的电池单体，其中，在所述第二方向上，所述加压部的边缘超出所述第一面。
  7. 根据权利要求3所述的电池单体，其中，所述加压部朝向背离所述电极组件的方向凸出。
  8. 根据权利要求3至7中任一项所述的电池单体，其中，
    所述变形部由形状记忆材料制成，所述形状记忆材料包括形状记忆合金、形状记 忆聚合物或形状记忆陶瓷；和/或
    所述加压部由非形状记忆材料制成，所述非形状记忆材料包括聚酰亚胺、聚苯醚树脂、聚醚醚酮、聚丙烯和聚乙烯中的至少一种。
  9. 根据权利要求1至8中任一项所述的电池单体，其中，
    所述电极组件为圆柱状结构，所述加压组件被配置为在所述电池单体的内部温度达到所述阈值时沿所述圆柱状结构的周向收缩。
  10. 根据权利要求1至9中任一项所述的电池单体，其中，所述加压组件由形状记忆材料制成。
  11. 根据权利要求1至10中任一项所述的电池单体，其中，
    所述加压组件包括通孔，所述通孔沿所述加压组件的厚度方向贯通所述加压组件。
  12. 根据权利要求11所述的电池单体，其中，所述通孔设置为多个，多个所述通孔阵列排布。
  13. 一种电池，其中，包括多个如权利要求1至12任一项所述的电池单体。
  14. 一种用电装置，其中，包括如权利要求13所述的电池，所述电池用于提供电能。
  15. 一种电池单体的制造方法，包括：
    提供电极组件和加压组件，所述加压组件环绕所述电极组件的外周设置，所述加压组件被配置为在所述电池单体的内部温度达到阈值时变形，以约束所述电极组件；
    提供壳体，将所述电极组件和所述加压组件容纳于所述壳体内。
  16. 一种电池单体的制造系统，包括：
    第一提供装置，用于提供电极组件和加压组件，所述加压组件环绕所述电极组件的外周设置，所述加压组件被配置为在所述电池单体的内部温度达到阈值时变形，以约束所述电极组件；
    第二提供装置，用于提供壳体，将所述电极组件和所述加压组件容纳于所述壳体内。
PCT/CN2022/144342 2022-01-11 2022-12-30 电池单体及其制造方法和制造系统、电池以及用电装置 WO2023134487A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202290000293.1U CN221352843U (zh) 2022-01-11 2022-12-30 电池单体和制造系统、电池以及用电装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210025782.9 2022-01-11
CN202210025782.9A CN116470193A (zh) 2022-01-11 2022-01-11 电池单体及其制造方法和制造系统、电池以及用电装置

Publications (1)

Publication Number Publication Date
WO2023134487A1 true WO2023134487A1 (zh) 2023-07-20

Family

ID=87175818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/144342 WO2023134487A1 (zh) 2022-01-11 2022-12-30 电池单体及其制造方法和制造系统、电池以及用电装置

Country Status (2)

Country Link
CN (2) CN116470193A (zh)
WO (1) WO2023134487A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206059484U (zh) * 2016-10-14 2017-03-29 宁德时代新能源科技股份有限公司 电池模组
CN207116549U (zh) * 2017-08-31 2018-03-16 宁德时代新能源科技股份有限公司 框体以及电池模组
CN108028419A (zh) * 2015-05-14 2018-05-11 艾诺维克斯公司 用于能量存储设备的纵向约束
JP2018120665A (ja) * 2017-01-23 2018-08-02 株式会社豊田自動織機 電池膨張判定装置
US10658632B1 (en) * 2017-09-25 2020-05-19 Apple Inc. Battery housings for accommodating swelling of electrode assemblies
CN111384423A (zh) * 2018-12-29 2020-07-07 长城汽车股份有限公司 加压组件、燃料电池堆及其第一端板组件、加压框架、组装方法和车辆

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108028419A (zh) * 2015-05-14 2018-05-11 艾诺维克斯公司 用于能量存储设备的纵向约束
CN206059484U (zh) * 2016-10-14 2017-03-29 宁德时代新能源科技股份有限公司 电池模组
JP2018120665A (ja) * 2017-01-23 2018-08-02 株式会社豊田自動織機 電池膨張判定装置
CN207116549U (zh) * 2017-08-31 2018-03-16 宁德时代新能源科技股份有限公司 框体以及电池模组
US10658632B1 (en) * 2017-09-25 2020-05-19 Apple Inc. Battery housings for accommodating swelling of electrode assemblies
CN111384423A (zh) * 2018-12-29 2020-07-07 长城汽车股份有限公司 加压组件、燃料电池堆及其第一端板组件、加压框架、组装方法和车辆

Also Published As

Publication number Publication date
CN221352843U (zh) 2024-07-16
CN116470193A (zh) 2023-07-21

Similar Documents

Publication Publication Date Title
WO2023025107A1 (zh) 电池单体、电池以及用电装置
WO2023092758A1 (zh) 电池单体及其制造方法和制造设备、电池以及用电设备
US11522249B2 (en) Pouch-type battery cell including venting member and battery pack including the same
CN115715438B (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023028864A1 (zh) 泄压装置、电池单体、电池及用电设备
CN215299297U (zh) 电极组件、电池单体、电池以及用电装置
US20240055705A1 (en) Battery cell, battery, power consuming apparatus, and method and apparatus for manufacturing battery cell
CN116783723A (zh) 电池单体、电池、用电设备、电池单体的制造方法及设备
CN115606020A (zh) 电极组件及其制造方法和制造系统、电池单体以及电池
CN217768702U (zh) 电池单体、电池以及用电装置
WO2023134487A1 (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023220881A1 (zh) 端盖、电池单体、电池及用电设备
WO2023060517A1 (zh) 一种极片、电极组件、电池单体、电池以及用电设备
CN116779944A (zh) 电芯、电芯的制造方法、电池单体、电池及用电设备
JPH10326627A (ja) 角形非水電解液二次電池
WO2024168709A1 (zh) 电池单体、电池以及用电装置
US11978910B2 (en) Electrode assembly, battery cell, battery, and electrical device
WO2023097501A1 (zh) 电池及其制造方法和制造设备以及用电装置
WO2024031255A1 (zh) 电极组件、电池单体、电池及用电设备
CN220382161U (zh) 电极组件、电池单体、电池及用电设备
CN218414630U (zh) 极片、电极组件、电池单体、电池及用电装置
CN221407584U (zh) 一种电池单体、电池及用电设备
CN219457976U (zh) 电池单体、电池及用电设备
KR20180025804A (ko) 가압 지그 및 이를 이용한 이차전지 제조 방법
CN218215606U (zh) 端盖组件、电池单体、电池及用电设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22920117

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE