End cover, battery cell, battery, and electric device

Abstract

The present application discloses an end cover, a battery cell, a battery, and an electric device. The end cover comprises: a cover body, a first insulating member, and a second insulating member. The first insulating member is fixedly connected to the cover body, and one end of the first insulating member forms a first connecting end; the second insulating member is fixedly connected to the cover body, and one end of the second insulating member forms a second connecting end; and the first connecting end and the second connecting end are oppositely arranged and fixedly connected. The end cover provided by the present application improves the yield rate and the production efficiency of battery cells.

Description

End cap, battery cell, battery and electrical equipment Cross-reference to related applications This application claims the priority of Chinese Patent Application No. 202323135865.2, titled "End cap, battery cell, battery and electrical equipment", filed on November 21, 2023, the entire content of which is incorporated herein by reference. Technical field This application relates to the technical field of batteries, and specifically, to an electrical end cap, a battery cell, a battery and an electrical equipment. Background art Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development. Batteries are widely used in fields such as portable electronic devices, electric transportation vehicles, electric tools, drones, energy storage devices, etc. In the manufacturing process of batteries, the yield rate of components in the battery is an issue that cannot be ignored. Therefore, how to improve the reliability of batteries is an urgent technical problem in battery technology. Summary of the invention This application provides an end cap, a battery cell, a battery and an electrical equipment, and this end cap can improve the reliability of the battery cell. This application is implemented through the following technical solutions: In a first aspect, an embodiment of this application provides an end cap, including: a cover body, a first insulating member and a second insulating member; the first insulating member is fixedly connected to the cover body, and one end of the first insulating member forms a first connection end; the second insulating member is fixedly connected to the cover body, and one end of the second insulating member forms a second connection end; wherein, the first connection end and the second connection end are arranged opposite to each other and fixedly connected. According to the end cap of the embodiment of this application, the first insulating member and the second insulating member are fixed on the cover body. By fixedly connecting the first connection end and the second connection end, the movement amplitude of the first connection end and the second connection end under the action of gravity is reduced, thereby reducing the deformation amount of the first insulating member and the second insulating member. Therefore, after the end cap is installed on the housing of the battery, the first insulating member and the second insulating member are not easily damaged, thereby reducing the installation difficulty of the battery cell and improving the yield rate and production efficiency of the battery cell. According to some embodiments of this application, the first insulating member and the second insulating member are arranged in a first direction; the first insulating member has a first fixing portion fixedly connected to the cover body, and the portion of the first insulating member between the first fixing portion and the first connection end is configured as a first suspension section. In the first direction, the maximum dimension of the first suspension section is a 1, the minimum thickness of the first suspension section is t 1 , satisfying: 40 ≤ a 1 / t 1 ≤ 2100; and / or The second insulating member has a second fixing portion connected to the cover body. The portion of the second insulating member between the second fixing portion and the second connection end is configured as a second suspension section. In the first direction, the maximum dimension of the second suspension section is a 2 , the minimum thickness of the second suspension section is t 2 , satisfying: 40 ≤ a 2 / t 2 ≤ 2100. In the above solution, the first insulating member has a large and thin structure, thereby reducing the ratio of the volume of the first insulating member to the space occupied by the battery cell and improving the energy density of the battery cell. The second insulating member has a large and thin structure, thereby reducing the ratio of the volume of the second insulating member to the space occupied by the battery cell, thereby improving the energy density of the battery cell. According to some embodiments of the present application, satisfying: 60 ≤ a 1 / t 1 ≤ 1500, and / or 60 ≤ a 2 / t 2 ≤ 1500. In the above solution, the first insulating member has a large and thin structure, thereby reducing the ratio of the volume of the first insulating member to the space occupied by the battery cell and improving the energy density of the battery cell. The second insulating member has a large and thin structure, thereby reducing the ratio of the volume of the second insulating member to the space occupied by the battery cell, thereby improving the energy density of the battery cell. According to some embodiments of the present application, the first connection end and the second connection end are detachably connected. In the above solution, when the battery needs to be repaired, the first connection end and the second connection end can be disassembled, so that the first connection end and the second connection end are separated, so that the part of the cover body blocked by the first suspension section and the second suspension section can be exposed, facilitating the staff to repair the end cover. According to some embodiments of the present application, the first connection end and the second connection end are snap-connected. In the above solution, the connection and separation between the first connection end and the second connection end are very convenient, improving the production efficiency and repair efficiency of the end cover. According to some embodiments of the present application, the first connection end is provided with a first mating portion, and the second connection end is provided with a second mating portion; a card hole is provided on the first mating portion, and the second mating portion is configured as an elastic member and the size of the free end of the second mating portion is larger than the size of the card hole, so as to be snap-fitted with the first mating portion after the free end of the second mating portion passes through the card hole. In the above solution, the connection and separation between the first connection end and the second connection end are very convenient, improving the production efficiency and maintenance efficiency of the end cover. According to some embodiments of the present application, the first connection end is provided with a first protrusion, the first protrusion protrudes away from the cover body, and the first mating portion is arranged on the first protrusion. In the above solution, the first mating portion does not need to specially extend a connection portion at the first connection end, and the first mating portion can make full use of the space defined between the first protrusion and the cover body, so that the thickness of the end cover will not be increased due to the arrangement of the first mating portion, and at least to a certain extent, the energy density of the battery cell is improved. According to some embodiments of the present application, the first insulating member is further provided with a second protrusion, the second protrusion protrudes away from the cover body, and the second insulating member is provided with a third protrusion, the third protrusion protrudes away from the cover body. In the above solution, after the end cover is installed on the battery case, the first protrusion can be pressed against the middle area of the end face of the electrode assembly facing the end cover, and the second protrusion and the third protrusion can be pressed against the end areas of the end face of the electrode assembly facing the end cover. According to some embodiments of the present application, the first connection end and the second connection end are adhesively fixed. In the above solution, the first connection end and the second connection end can be conveniently connected together, improving the connection efficiency of the first connection end and the second connection end. According to some embodiments of the present application, the first connection end and the second connection end are fixedly connected by fasteners. According to some embodiments of the present application, the end cover includes a first electrode terminal and a second electrode terminal, and both the first electrode terminal and the second electrode terminal are installed on the cover body; A first through hole for the first electrode terminal to pass through is provided on the first insulating member, a second through hole for the second electrode terminal to pass through is provided on the second insulating member, the area on the inner side wall of the first through hole closest to the first connection end is configured as the first fixing portion, and the area on the inner side wall of the second through hole closest to the second connection end is configured as the second fixing portion. According to some embodiments of the present application, the first insulating member is provided with a first receiving area for receiving a force, the first insulating member is provided with a first reinforcing member, and at least part of the first reinforcing member is arranged around the first receiving area; The second insulating member is provided with a second receiving area for receiving a force, and the second insulating member is provided with a second reinforcing member, and at least a part of the second reinforcing member is disposed around the second receiving area. In the above solution, the overall deformation amount of the first insulating member and the second insulating member is reduced, so that it is convenient for the ejector pin to smoothly demold the first insulating member and the second insulating member, and the demolding efficiency of the first insulating member and the second insulating member is improved. According to some embodiments of the present application, the first insulating member is provided with a first through hole, the first reinforcing member is located on the outer periphery of the first through hole, the second insulating member is provided with a second through hole, and the second reinforcing member is located on the outer periphery of the second through hole. In the above solution, when the ejector pin pushes against the area around the first through hole on the first insulating member to complete demolding, the deformation amount of the area around the first through hole on the first insulating member can be reduced, so that it is convenient to eject the first insulating member, and the demolding efficiency of the first insulating member is improved. The effect of the second reinforcing member being located on the outer periphery of the second through hole is similar to that of the first reinforcing member being located on the outer periphery of the first through hole, and will not be elaborated here. According to some embodiments of the present application, the first reinforcing member is configured as a plurality of, and the plurality of first reinforcing members are arranged at intervals along the circumferential direction of the first through hole, the second reinforcing member is configured as a plurality of, and the plurality of second reinforcing members are arranged at intervals along the circumferential direction of the second through hole. In the above solution, not only can the structural strength of the area around the first through hole on the first insulating member be improved, but also the structural strength of the area around the first through hole on the first insulating member can tend to be consistent. The effect of the second reinforcing member being configured as a plurality of is similar to the above effect, and will not be elaborated here. According to some embodiments of the present application, the first reinforcing member is arc-shaped and has a first opening, the first opening faces away from the first through hole, the second reinforcing member is arc-shaped and has a second opening, and the second opening faces away from the second through hole. In the above solution, the arc-shaped reinforcing rib can better improve the structural strength of the area around the first through hole on the first insulating member compared with the straight-shaped reinforcing rib; the effect of the second reinforcing member being arc-shaped is similar to the above effect, and will not be elaborated here. According to some embodiments of the present application, at least a part of the first reinforcing member is located between the first through hole and the first receiving area, and at least a part of the second reinforcing member is located between the second through hole and the second receiving area. In the above solution, not only can the structural strength of the area around the first receiving area be increased, but also the structural strength of the area around the first through hole can be increased. The effect of at least a part of the second reinforcing member being located between the second through hole and the second receiving area is similar to the above effect, and will not be elaborated here. In a second aspect, an embodiment of the present application provides a battery cell, including the above-mentioned end cover. According to some embodiments of the present application, the battery cell further includes a housing and an electrode assembly. The housing has an open mouth, and the end cap closes the open mouth. The end cap and the housing form a receiving chamber for receiving the electrode assembly. The battery cell further includes an insulating film that wraps the electrode assembly, and one end of the insulating film is connected to the first insulating member and / or the second insulating member. In the above solution, the insulating film, the first insulating member, and the second insulating member together insulate the electrode assembly from the outer shell and the cover body, improving the safety performance of the battery cell and reducing the probability of problems such as short circuit or leakage. In a third aspect, an embodiment of the present application provides a battery, including the above battery cell. In a fourth aspect, an embodiment of the present application provides an electrical device, including the above battery. Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. 。 Description of the Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. FIG. 1 is a schematic diagram of a vehicle provided by the first embodiment of the present application; FIG. 2 is an exploded view of a battery provided by the first embodiment of the present application; FIG. 3 is an exploded view of a battery cell provided by the first embodiment of the present application; FIG. 4 is a schematic diagram of an end cap in one direction provided by the first embodiment of the present application; FIG. 5 is a schematic diagram of the end cap in another direction provided by the first embodiment of the present application; FIG. 6 is a schematic diagram of the end cap in yet another direction provided by the first embodiment of the present application; FIG. 7 is a cross-sectional view taken along the A-A direction of FIG. 6; FIG. 8 is a schematic diagram of a first insulating member and a second insulating member provided by the first embodiment of the present application; FIG. 9 is a schematic diagram of a first insulating member and a second insulating member provided by the second embodiment of the present application. Icons: 1000 - Vehicle, 100 - Battery, 200 - Controller, 300 - Motor, 10 - Box, 20 - Battery Cell, 11 - First Sub - box, 12 - Second Sub - box, 21 - Outer Shell, 22 - Electrode Assembly, 25 - Electrode Terminal, 211 - Housing, 212 - End Cap, 2121 - Cover Body, 2122 - First Insulating Part, 2122a - First Connection End, 2122b - First Fixing Part, 2122c - First Reinforcing Part, 101 - First Through - hole, 103 - First Suspension Section, 107 - First Receiving Area, 109a - First Through - hole, 2123 - Second Insulating Part, 2123a - Second Connection End, 2123b - Second Fixing Part, 2123c - Second Reinforcing Part, 102 - Second Through - hole, 104 - Second Suspension Section, 108 - Second Receiving Area, 109b - Second Through - hole, 105 - First Fitting Part, 1051 - Locking Hole, 106 - Second Fitting Part, 1061 - Connecting Rod, 1062 - Buckle, 2124 - First Protrusion, 2125 - Second Protrusion, 2126 - Third Protrusion, 2127 - First Electrode Terminal, 2128 - Second Electrode Terminal. Detailed Implementation Manner

[0053] The following further describes in detail the implementation manners of the present application in conjunction with the accompanying drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification of the application are only for the purpose of describing specific embodiments, not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above - mentioned drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above - mentioned drawings are used to distinguish different objects, not to describe a specific order or primary - secondary relationship. Referring to the "embodiment" in the present application means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments. In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "linked", "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship. The term "a plurality of" as used in the present application refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets). In some embodiments, the battery can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. In some embodiments, the battery can be a battery pack. The battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body. In some embodiments, the box body can be a part of the chassis structure of a vehicle. For example, a part of the box body can become at least a part of the floor of the vehicle, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle. In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc. In the embodiments of the present application, the battery cell can be a secondary battery. A secondary battery refers to a battery cell that can be activated by charging after discharging to continue use. The battery cell can be but is not limited to a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can play a role in preventing short circuit between the positive and negative electrodes and at the same time allow active ions to pass through. In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector. As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on either or both of the two opposite surfaces of the positive electrode current collector. As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). As an example, the positive electrode active material can include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used. In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector. As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector. As an example, the negative electrode active material can be a negative electrode active material for a battery well-known in the art. As an example, the negative electrode active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of the battery can also be used. These negative electrode active materials can be used alone or in combination of two or more. In some embodiments, the separator is a separator membrane. The present application does not have a particular limitation on the type of the separator membrane, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected. As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or can be attached to the surfaces of the positive and negative electrodes. In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes. In some embodiments, the battery cell further includes an electrolyte, which functions to conduct ions between the positive and negative electrodes. The electrolyte can be liquid, gel or solid. Among them, the liquid electrolyte includes an electrolyte salt and a solvent. In some embodiments, the electrolyte salt can include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoro(oxalato)borate, lithium bis(oxalato)borate, lithium difluoro bis(oxalato)phosphate, and lithium tetrafluoro(oxalato)phosphate. In some embodiments, the solvent can include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether solvent. The ether solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether. Among them, the gel electrolyte includes a polymer as the skeleton network of the electrolyte, combined with an ionic liquid-lithium salt. Among them, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte. As an example, the polymer solid electrolyte can be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single-ion polymer, poly(ionic liquid)-lithium salt, cellulose, etc. As an example, the inorganic solid electrolyte may include one or more of oxide solid electrolytes (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), sulfide solid electrolytes (crystalline lithium superionic conductor (lithium germanium phosphorus sulfur, argyrodite), amorphous sulfide), and halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes. As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte. In some embodiments, the electrode assembly has a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure. In some embodiments, the electrode assembly has a stacked structure. In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum plastic film, etc. In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating substances such as the electrode assembly and the electrolyte. The housing body may be provided with one or more openings. One or more end caps may also be provided. In some embodiments, at least one electrode terminal is provided on the housing. The electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through an adapter. The electrode terminal can be provided on the end cap or on the housing body. In some embodiments, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cell. As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc. There is no particular limitation in the embodiments of the present application. The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. In some embodiments, the battery can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. In some embodiments, the battery can be a battery pack. The battery pack includes a box body and battery cells. The battery cells or the battery module are accommodated in the box body. In some embodiments, the box body can be a part of the chassis structure of a vehicle. For example, a part of the box body can become at least a part of the floor of the vehicle, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle. In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc. The battery has prominent advantages such as high energy density, low environmental pollution, high power density, long service life, wide application range, and small self-discharge coefficient, and is an important part of the development of new energy today. The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as energy density, discharge capacity, charge and discharge rate, etc. In addition, the assembly efficiency of the battery also needs to be considered. The battery cell disclosed in the embodiments of the present application can be but is not limited to being used in power-consuming devices such as vehicles, ships, or aircraft. The power supply system of the power-consuming device can be composed of the battery cell and the battery disclosed in the present application. The embodiments of the present application provide a power-consuming device using a battery cell as a power source. The power-consuming device can be but is not limited to mobile phones, tablet computers, laptop computers, electric toys, electric tools, electric bicycles, electric motorcycles, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc. For the convenience of description, the following embodiments take a power-consuming device of an embodiment of the present application as a vehicle 1000 as an example for description. Please refer to FIG. 1. FIG. 1 is a schematic diagram of a vehicle provided by the first embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery 100 is disposed inside the vehicle 1000. The battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000. For example, the battery 100 can be used as an operating power source of the vehicle 1000 for the circuit system of the vehicle 1000, such as for the working power requirements during the start, navigation, and operation of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, such as for the working power requirements during the start, navigation, and driving of the vehicle 1000. In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000. Please refer to FIG. 2. FIG. 2 is an exploded view of the battery provided in the first embodiment of the present application. The battery 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first sub-box body 11 and a second sub-box body 12. The first sub-box body 11 and the second sub-box body 12 cover each other, and the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space for accommodating the battery cells 20. The second sub-box body 12 may be a hollow structure with one end open, and the first sub-box body 11 may be a plate-like structure. The first sub-box body 11 covers the open side of the second sub-box body 12, so that the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space; the first sub-box body 11 and the second sub-box body 12 may also both be hollow structures with one side open, and the open side of the first sub-box body 11 covers the open side of the second sub-box body 12. In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body 10; of course, the battery 100 may also be that multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 10. The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for realizing the electrical connection among the multiple battery cells 20. Among them, the battery cell 20 may be a secondary battery or a primary battery; the battery cell 20 may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. Please refer to FIG. 3. FIG. 3 is an exploded view of the battery cell provided in some embodiments of the present application. As shown in FIG. 3, the battery cell 20 includes a housing 21, an electrode assembly 22, and an electrode terminal 25. The housing 21 includes a case 211 and an end cap 212. The case 211 has an opening, and the end cap 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment. The case 211 is a component for cooperating with the end cap 212 to form the internal environment of the battery cell 20. Among them, the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte, and other components. The case 211 and the end cap 212 may be independent components. The case 211 may have various shapes and various sizes. Specifically, the shape of the case 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the case 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The end cap 212 refers to a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 212 can be adapted to the shape of the housing 211 to fit the housing 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 212 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on the end cap 212. The electrode terminals can be used to electrically connect to the electrode assembly 22 for outputting or inputting the electrical energy of the battery cell 20. The material of the end cap 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 212, and the insulating structure can be used to isolate the electrical connection components in the housing 211 from the end cap 212 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc. The electrode assembly 22 is a component in the battery cell 20 where an electrochemical reaction occurs. The housing 211 can contain one or more electrode assemblies 22. The electrode assembly 22 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually an isolation film is provided between the positive electrode plate and the negative electrode plate. The isolation film is used to separate the positive electrode plate and the negative electrode plate to prevent internal short circuit between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate with active substances constitute the main body of the electrode assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances respectively constitute the electrode tabs. The positive electrode tab and the negative electrode tab can be located at one end of the main body together or at both ends of the main body respectively. During the charging and discharging process of the battery, the positive active substance and the negative active substance react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form a current loop. Batteries are widely used in fields such as portable electronic devices, electric vehicles, power tools, drones, energy storage devices, etc. Among them, the energy density of the battery directly determines the energy storage capacity of the battery. The greater the energy density of the battery, the greater the power of the battery of the same volume, and more electrical energy can be stored. Thus, after the battery is installed in an electrical device, the usage duration of the electrical device can be increased. The thickness of the end cap and the thickness of the housing can affect the energy density of the battery. Therefore, as the requirement for the energy density of the battery is getting higher and higher, the thickness of the end cap and the thickness of the housing are getting thinner and thinner. And the insulating part (i.e., the battery lower plastic) provided on the inner side of the end cap, as a part of the end cap, the thickness of the insulating part is also getting thinner and thinner. The existing insulating member may include a first insulating member and a second insulating member that are separately arranged. In order to improve the energy density of the battery, the thickness of the first insulating member and the thickness of the second insulating member are becoming thinner and thinner. The first insulating member can be installed between the cover body of the end cover and the pole by injection molding. Since the thickness of the first insulating member is relatively thin, a suspension section will be formed between the area where the first insulating member and the cover body are fixed and the end of the first insulating member close to the second insulating member. Similarly, since the thickness of the second insulating member is relatively thin, a suspension section will be formed between the area where the second insulating member and the cover body are fixed and the end of the second insulating member close to the first insulating member. The free end of the suspension section of the first insulating member and the free end of the suspension section of the second insulating member will move downward under the action of gravity, causing the first insulating member and the second insulating member to deform. As a result, when the end cover is installed on the battery housing, the positioning of the first insulating member and the second insulating member is easily inaccurate, and the first insulating member is easily inaccurate. The edge member and the second insulating member are damaged, thereby reducing the yield rate of the battery and increasing the difficulty of battery production. Therefore, the present application proposes an end cover, which can effectively reduce the deformation of the suspension section of the first insulating member and the deformation of the suspension section of the second insulating member, improve the yield rate of the battery, reduce the difficulty of battery production and improve the production efficiency of the battery. As shown in Figures 4 to 7, the end cap 212 according to the embodiment of the present application may include a cover body 2121, a first insulating member 2122, and a second insulating member 2123. The cover body 2121 and the battery shell define a housing chamber for housing the electrode assembly. The cover body 2121 may be a metal member or an insulating member, and the present application does not limit the material of the cover body 2121. The first insulating member 2122 is fixedly connected to the cover body 2121 . The middle area of ​​the first insulating member 2122 may be fixedly connected to the cover body 2121 . Of course, the edge area of ​​the first insulating member 2122 may also be fixedly connected to the cover body 2121 . One end of the first insulating member 2122 forms a first connecting end 2122a, and one end of the first insulating member 2122 can be spaced a certain distance from the area on the first insulating member 2122 that is fixed to the cover body 2121, so that a suspension section is formed between the first connecting end 2122a and the part on the first insulating member 2122 that is fixed to the cover body 2121, and the first connecting end 2122a is the free end of the suspension section. In one embodiment of the present application, the middle area of ​​the first insulating member 2122 in the length direction can be fixedly connected to the cover body 2121, and one end of the first insulating member 2122 in the length direction can form a first connecting end 2122a. The first insulating member 2122 may be made of an insulating material. For example, the first insulating member 2122 may be constructed as a rubber member, a plastic member, etc. The present application does not limit the specific material of the first insulating member 2122. The second insulating member 2123 is fixedly connected to the cover body 2121. The middle region of the second insulating member 2123 can be fixedly connected to the cover body 2121. Of course, the edge region of the second insulating member 2123 can also be fixedly connected to the cover body 2121. One end of the second insulating member 2123 forms a second connection end 2123a. One end of the second insulating member 2123 can be spaced from the region where the second insulating member 2123 is fixed to the cover body 2121, so that a suspension section is formed between the second connection end 2123a and the part of the second insulating member 2123 fixed to the cover body 2121, and the second connection end 2123a is the free end of this suspension section. In an embodiment of the present application, the middle region of the second insulating member 2123 in the length direction can be fixedly connected to the cover body 2121, and one end of the second insulating member 2123 in the length direction can form a second connection end 2123a. The second insulating member 2123 can be made of an insulating material. For example, the second insulating member 2123 can be configured as a rubber member, a plastic member, etc. The present application does not limit the specific material of the second insulating member 2123. In some embodiments of the present application, the first connection end 2122a and the second connection end 2123a are oppositely arranged and fixedly connected. Since the first connection end 2122a and the second connection end 2123a are fixedly connected to each other, the second connection end 2123a can limit the movement amplitude of the first connection end 2122a under the action of gravity, and the first connection end 2122a can limit the movement amplitude of the second connection end 2123a under the action of gravity. Obviously, although the thicknesses of the first insulating member 2122 and the second insulating member 2123 are small, since the first connection end 2122a limits the descending amplitude of the second connection end 2123a, the deformation amount of the second insulating member 2123 is reduced. Since the second connection end 2123a limits the descending amplitude of the first connection end 2122a, the deformation amount of the first connection end 2122a is reduced. The free end of the suspension section of the above-mentioned first insulating member 2122 is no longer free because it is fixedly connected to the second connection end 2123a, and the suspension section of the first insulating member 2122 is no longer suspended. At this time, the free end of the suspension section of the first insulating member 2122 is the above-mentioned first connection end 2122a. The free end of the suspension section of the second insulating member 2123 is no longer free because it is fixedly connected to the first connection end 2122a, and the suspension section of the second insulating member 2123 is no longer suspended. At this time, the free end of the suspension section of the second insulating member 2123 is the above-mentioned second connection end 2123a. The first connection end 2122a and the second connection end 2123a can be fixed by snap connection, can be fixed by adhesion, or can be fixed together by fasteners. This application does not limit the fixing method of the first connection end 2122a and the second connection end 2123a. As long as the first connection end 2122a and the second connection end 2123a are fixed together to limit their relative movement, the deformation of the first insulating part 2122 and the deformation of the second insulating part 2123 can be reduced. According to the end cover 212 of the embodiment of the present application, the first insulating part 2122 and the second insulating part 2123 are fixed on the cover body 2121. By fixedly connecting the first connection end 2122a and the second connection end 2123a, the movement range of the first connection end 2122a and the second connection end 2123a under the action of gravity is reduced, thereby reducing the deformation of the first insulating part 2122 and the deformation of the second insulating part 2123. After the end cover 212 is installed on the housing of the battery, the first insulating part 2122 and the second insulating part 2123 are not easily damaged, thereby reducing the installation difficulty of the battery cell and improving the yield and production efficiency of the battery cell. As shown in FIG. 7, in some embodiments of the present application, the first insulating part 2122 and the second insulating part 2123 are arranged in the first direction X. The first direction X can be the length direction of the first insulating part 2122 or the second insulating part 2123. Thus, the first connection end 2122a can be one end of the first insulating part 2122 in the length direction, and the second connection end 2123a can be one end of the second insulating part 2123 in the length direction. Of course, the first direction X can also be the length direction of the overall structure of the first insulating part 2122 and the second insulating part 2123. For example, if both the first insulating part 2122 and the second insulating part 2123 are square, after they are arranged, the overall structure of the first insulating part 2122 and the second insulating part 2123 is rectangular. Therefore, the first direction X is the length direction of this overall structure. The first insulating part 2122 has a first fixing part 2122b fixedly connected to the cover body 2121. For example, a first through hole 101 for the pole post to pass through is provided on the first insulating part 2122, and the inner peripheral edge of the first through hole 101 is fixedly connected to the cover body 2121. Thus, the inner peripheral edge of the first through hole 101 is the above-mentioned first fixing part 2122b. The portion of the first insulating member 2122 located between the first fixing portion 2122b and the first connection end 2122a is configured as the first suspension segment 103. It should be noted that the first fixing portion 2122b is one of the two ends forming the first suspension segment 103. That is to say, not all of the portion of the first insulating member 2122 fixed to the cover 2121 is the first fixing portion 2122b of the present application, but only the portion that defines the first suspension segment 103 with the first connection end 2122a is the first fixing portion 2122b of the present application. For example, a first through hole 101 for the pole column to pass through is provided on the first insulating member 2122, and the inner peripheral edge of the first through hole 101 is fixedly connected to the cover 2121, but not all of the inner peripheral edge of the first through hole 101 is the first fixing portion 2122b, but the portion that defines the first suspension segment 103 with the first connection end 2122a is the first fixing portion 2122b of the present application. In the first direction X, the dimension of the first suspension segment 103 is a 1 , and the minimum thickness of the first suspension segment 103 is t 1 , satisfying: 40 ≤ a 1 / t 1 ≤ 2100. The ratio of the dimension of the first suspension segment 103 in the first direction X to the minimum thickness of the first suspension segment 103 characterizes the ease of bending. The smaller the ratio of the dimension of the first suspension segment 103 in the first direction X to the minimum thickness of the first suspension segment 103, the smaller the dimension of the first suspension segment 103 in the first direction X and the relatively larger the thickness of the first suspension segment 103. At this time, the first suspension segment 103 is relatively not easy to bend; the larger the ratio of the dimension of the first suspension segment 103 in the first direction X to the minimum thickness of the first suspension segment 103, the larger the dimension of the first suspension segment 103 in the first direction X and the relatively larger the thickness of the first suspension segment 103. At this time, the first suspension segment 103 is relatively easy to bend. For example, the dimension of the first suspension segment 103 is a 1 and the minimum thickness of the first suspension segment 103 is t 1 The ratio a 1 / t 1 can be 40, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100. The embodiments of the present application do not limit the specific range of a 1 / t 1 , as long as the above range is satisfied. The ratio of the dimension of the first suspension segment 103 of the present application in the first direction X to the minimum thickness of the first suspension segment 103 satisfies the above conditions, such that the first suspension segment 103 requires the first connection end 2122a and the second connection end 2123a to be fixedly connected to limit the deformation amount of the first suspension segment 103. At the same time, the deformation amount of the first suspension segment 103 can also be significantly constrained after the first connection end 2122a and the second connection end 2123a are fixedly connected, effectively reducing the probability of damage to the first insulating member 2122 during the process of installing the cover plate on the battery case. Of course, there will be no technical problems such as excessive length or too thin thickness that may cause a large deformation amount of the first suspension segment 103 even after the first suspension segment 103 is fixedly connected by the first connection end 2122a and the second connection end 2123a. The second insulating member 2123 has a second fixing portion 2123b fixedly connected to the cover body 2121. For example, the second insulating member 2123 is provided with a second through hole 102 for the pole column to pass through, and the inner peripheral edge of the second through hole 102 is fixedly connected to the cover body 2121. Thus, the inner peripheral edge of the second through hole 102 is the above-mentioned second fixing portion 2123b. The portion of the second insulating member 2123 between the second fixing portion 2123b and the second connection end 2123a is configured as a second suspension segment 104. It should be noted that the second fixing portion 2123b is one of the two ends forming the second suspension segment 104. That is to say, not all of the portion of the second insulating member 2123 fixedly connected to the cover body 2121 is the second fixing portion 2123b of the present application, but only the portion that defines the second suspension segment 104 with the second connection end 2123a is the second fixing portion 2123b of the present application. For example, the second insulating member 2123 is provided with a second through hole 102 for the pole column to pass through, and the inner peripheral edge of the second through hole 102 is fixedly connected to the cover body 2121. However, not all of the inner peripheral edge of the second through hole 102 is the second fixing portion 2123b, but the portion that defines the second suspension segment 104 with the second connection end 2123a is the second fixing portion 2123b of the present application. In the first direction X, the dimension of the second suspension segment 104 is a 2 , and the minimum thickness of the second suspension segment 104 is t 2 , satisfying: 40 ≤ a 2 / t 2≤2100. The ratio of the dimension of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104 characterizes the ease of bending. The smaller the ratio of the dimension of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104, the relatively smaller the dimension of the second suspension section 104 in the first direction X and the relatively larger the thickness of the second suspension section 104. At this time, the second suspension section 104 is relatively not easy to bend; the larger the ratio of the dimension of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104, the relatively larger the dimension of the second suspension section 104 in the first direction X and the relatively larger the thickness of the second suspension section 104. At this time, the second suspension section 104 is relatively easy to bend. For example, the dimension of the second suspension section 104 is a 2 and the minimum thickness of the second suspension section 104 is t 2 The ratio a 2 / t 2 can be 40, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2100. The embodiments of the present application do not limit the specific range of a 2 / t 2 , as long as the above range is satisfied. The ratio of the dimension of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104 in the present application satisfies the above conditions, such that the second suspension section 104 requires the first connection end 2122a and the second connection end 2123a to be fixedly connected to limit the deformation amount of the second suspension section 104. At the same time, the deformation amount of the second suspension section 104 can also be significantly constrained after the first connection end 2122a and the second connection end 2123a are fixedly connected, effectively reducing the probability of damage to the second insulating member 2123 during the process of installing the cover plate on the battery case. Of course, there will also be no technical problems such as excessive length or too thin thickness, resulting in a large deformation amount of the second suspension section 104 even after the second suspension section 104 is fixedly connected by the first connection end 2122a and the second connection end 2123a. In some embodiments of the present application, in the first direction X, the dimension of the first suspension section 103 is a 1 , and the minimum thickness of the first suspension section 103 is t 1 , satisfying: 60 ≤ a 1 / t 1 ≤ 1500. For example, the ratio a 1 of the dimension of the first suspension section 103 and the minimum thickness of the first suspension section 103 is t 1 a 1 / t1 It can be 60, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500. The embodiments of the present application are not limited to a 1 / t 1 The specific range of the first suspension section 103 is limited as long as the above range is met. The ratio of the size of the first suspension section 103 in the first direction X to the minimum thickness of the first suspension section 103 represents the bending difficulty. The smaller the ratio of the size of the first suspension section 103 in the first direction X to the minimum thickness of the first suspension section 103 is, the smaller the size of the first suspension section 103 in the first direction X is, the larger the thickness of the first suspension section 103 is, the larger the size of the first suspension section 103 in the first direction X is, the larger the thickness of the first suspension section 103 is, and the easier it is to bend. In the first direction X, the size of the second suspension section 104 is a 2 , the minimum thickness of the second suspension section 104 is t 2 , satisfying: 60≤a 2 / t 2 ≤1500. For example, the size of the second suspension section 104 is a 2 The minimum thickness of the second suspension segment 104 is t 2 The ratio of a 2 / t 2 It can be 60, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500. The embodiments of the present application are not limited to a 2 / t 2 The specific range of the second suspension section 104 is limited as long as the above range is met. The ratio of the size of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104 represents the bending difficulty. The smaller the ratio of the size of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104 is, the smaller the size of the second suspension section 104 in the first direction X is, and the thickness of the second suspension section 104 is relatively large. At this time, the second suspension section 104 is relatively difficult to bend; the larger the ratio of the size of the second suspension section 104 in the first direction X to the minimum thickness of the second suspension section 104 is, the larger the size of the second suspension section 104 in the first direction X is, and the thickness of the second suspension section 104 is relatively large. At this time, the second suspension section 104 is relatively easy to bend. In some embodiments of the present application, as shown in FIG. 7, the minimum thickness of the first insulating member 2122 is t 1 , satisfying: 0.1 mm ≤ t 1 ≤ 1.0 mm, and / or the minimum thickness of the second insulating member 2123 is t 2 , satisfying: 0.1 mm ≤ t 2 ≤ 1.0 mm. For example, the minimum thickness t 1 of the first insulating member 2122 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm. By making the minimum thickness of the first insulating member 2122 satisfy the above range, the overall thickness of the first insulating member 2122 can be reduced, and the ratio of the volume of the first insulating member 2122 to the space occupied by the battery cell 20 can be decreased, thereby improving the energy density of the battery cell 20. The above numerical values of the minimum thickness of the first insulating member 2122 are only common embodiments of the minimum thickness of the first insulating member 2122. As long as the minimum thickness of the first insulating member 2122 falls within the above range, it is within the protection scope of the present application. The minimum thickness t 2 of the second insulating member 2123 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm. By making the minimum thickness of the second insulating member 2123 satisfy the above range, the overall thickness of the second insulating member 2123 can be reduced, and the ratio of the volume of the second insulating member 2123 to the space occupied by the battery cell 20 can be decreased, thereby improving the energy density of the battery cell 20. The above numerical values of the minimum thickness of the second insulating member 2123 are only common embodiments of the minimum thickness of the second insulating member 2123. As long as the minimum thickness of the second insulating member 2123 falls within the above range, it is within the protection scope of the present application. According to some embodiments of the present application, the minimum thickness of the first insulating member 2122 is t1, satisfying: 0.1 mm ≤ t 1 ≤ 0.6 mm. For example, the minimum thickness t 1 of the first insulating member 2122 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm. That is to say, the minimum thickness of the first insulating member 2122 can be further reduced, so as to further reduce the overall thickness of the first insulating member 2122, decrease the ratio of the volume of the first insulating member 2122 to the space occupied by the battery cell 20, thereby improving the energy density of the battery cell 20. The above numerical values of the minimum thickness of the first insulating member 2122 are only common embodiments of the minimum thickness of the first insulating member 2122. As long as the minimum thickness of the first insulating member 2122 falls within the above range, it is within the protection scope of the present application. According to some embodiments of the present application, the minimum thickness of the second insulating member 2123 is t2, satisfying: 0.1 mm ≤ t 2 ≤ 0.6 mm. For example, the minimum thickness t 2 of the second insulating member 2123 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm. That is to say, the minimum thickness of the second insulating member 2123 can be further reduced, thereby further reducing the overall thickness of the second insulating member 2123, reducing the ratio of the volume of the second insulating member 2123 to the space occupied by the battery cell 20, and thus improving the energy density of the battery cell 20. The above numerical values of the minimum thickness of the second insulating member 2123 are only common embodiments of the minimum thickness of the second insulating member 2123. As long as the minimum thickness of the second insulating member 2123 falls within the above range, it is within the protection scope of the present application. In some embodiments of the present application, as shown in FIGS. 7-9, the first connection end 2122a and the second connection end 2123a are detachably connected. Thus, after the first connection end 2122a and the second connection end 2123a are connected together, the deformation amount of the first suspension section 103 under the action of gravity and the deformation amount of the second suspension section 104 under the action of gravity can be reduced. At the same time, when the battery needs to be overhauled, the first connection end 2122a and the second connection end 2123a can be disassembled, so that the first connection end 2122a and the second connection end 2123a can be separated, and thus the part of the cover body 2121 blocked by the first suspension section 103 and the second suspension section 104 can be exposed, facilitating the staff to overhaul the end cover 212. According to some embodiments of the present application, the detachable connection manner between the first connection end 2122a and the second connection end 2123a can be various. For example, the first connection end 2122a and the second connection end 2123a can be detachably connected by a snap connection manner, or can be detachably connected by an adhesive connection manner. Of course, they can also be detachably connected by a fastener manner. The present application does not limit the detachable connection manner between the first connection end 2122a and the second connection end 2123a, as long as it is ensured that the first connection end 2122a and the second connection end 2123a are connected together when the first suspension section 103 and the second suspension section 104 need to be connected, and can be disassembled and separated when the first suspension section 103 and the second suspension section 104 do not need to be connected. According to some embodiments of the present application, the first connection end 2122a and the second connection end 2123a are snap-connected. Thus, the connection and separation between the first connection end 2122a and the second connection end 2123a are very convenient, improving the production efficiency and overhaul efficiency of the end cover 212. In some embodiments of the present application, as shown in FIGS. 4, 7, and 8, a first mating portion 105 is provided at the first connection end 2122a, a second mating portion 106 is provided at the second connection end 2123a, a locking hole 1051 is provided on the first mating portion 105, the second mating portion 106 is configured as an elastic member, and the size of the free end of the second mating portion 106 is larger than the size of the locking hole 1051, so as to be snap-fitted with the first mating portion 105 after the free end of the second mating portion 106 passes through the locking hole 1051. The second mating portion 106 may include a connecting rod 1061 and a buckle 1062. The buckle 1062 is provided at the free end of the connecting rod 1061, that is, the buckle 1062 is provided at the end of the connecting rod 1061 away from the second connection end 2123a. The connecting rod 1061 can pass through the locking hole 1051, and the size of the buckle 1062 is larger than the size of the locking hole 1051. If the buckle 1062 is a member that is difficult to deform, it is difficult for the buckle 1062 to pass through the locking hole 1051. In the present application, the buckle 1062 is an elastic member. Therefore, the buckle 1062 can reduce its own size by deforming, so as to pass through the locking hole 1051. After passing through the locking hole 1051, the buckle 1062 can return to its original shape when no external force is applied. At this time, the size of the buckle 1062 is larger than the locking hole 1051 again. At this time, the connecting rod 1061 passes through the locking hole 1051 and cooperates with the locking hole 1051, and the buckle 1062 is snap-connected to the surface of the first mating portion 105. In some embodiments of the present application, when no external force is applied, the cross-sectional area of the buckle 1062 is larger than the cross-sectional area of the connecting rod 1061, so as to ensure that after the buckle 1062 passes through the locking hole 1051, the connecting rod 1061 can cooperate with the locking hole 1051, and at the same time, the buckle 1062 is snap-connected to the surface of the first mating portion 105. In some embodiments of the present application, as shown in FIGS. 4, 7, and 8, a first convex block 2124 is provided at the first connection end 2122a, and the first convex block 2124 protrudes in a direction away from the cover body 2121. It should be noted that the first convex block 2124 can press the electrode assembly when the end cover 212 is installed on the housing of the battery cell. Since the first mating portion 105 is provided on the first convex block 2124 Therefore, the first mating portion 105 does not need to specifically extend a connecting portion at the first connection end 2122a. The first mating portion 105 can make full use of the space defined between the first convex block 2124 and the cover body 2121, so that the thickness of the end cover 212 will not be increased due to the setting of the first mating portion 105, and at least to a certain extent, the energy density of the battery cell 20 is improved. In some embodiments of the present application, as shown in FIGS. 4, 7, and 8, the first insulating member 2122 is further provided with a second bump 2125 protruding away from the cover body 2121, and the second insulating member 2123 is provided with a third bump 2126 protruding away from the cover body 2121. For example, the first insulating member 2122 has two ends in the length direction, one end is close to the second insulating member 2123, and the other end is far from the second insulating member 2123. The second bump 2125 can be provided on the side surface of the other end of the first insulating member 2122 facing away from the cover body 2121; the second insulating member 2123 has two ends in the length direction, one end is close to the first insulating member 2122, and the other end is far from the first insulating member 2122. The third bump 2126 can be provided on the side surface of the other end of the second insulating member 2123 facing away from the cover body 2121. After the end cover 212 is installed on the battery housing, the second bump 2125 and the third bump 2126 are pressed against the electrode assembly. It can be understood that after the end cover 212 is installed on the battery housing, the first bump 2124 can be pressed against the middle area of the end face of the electrode assembly facing the end cover 212, and the second bump 2125 and the third bump 2126 can be pressed against the end areas of the end face of the electrode assembly facing the end cover 212. In some embodiments of the present application, the first connection end 2122a and the second connection end 2123a are adhesively fixed. Thereby, the first connection end 2122a and the second connection end 2123a can be conveniently connected together, improving the connection efficiency of the first connection end 2122a and the second connection end 2123a. According to some embodiments of the present application, the first connection end 2122a and the second connection end 2123a are fixedly connected by fasteners. For example, the first connection end 2122a and the second connection end 2123a can be fixedly connected by bolts. When it is necessary to separate the first insulating member 2122 and the second insulating member 2123, the bolts can be unscrewed from the first connection end 2122a and the second connection end 2123a, improving the maintenance efficiency of the battery cell. Of course, the first connection end 2122a and the second connection end 2123a can also be fixedly connected by riveting. The present application does not specifically limit the type of fasteners. As long as the first connection end 2122a and the second connection end 2123a are connected by fasteners, they are all within the protection scope of the present application. According to some embodiments of the present application, as shown in FIGS. 4-7, the end cap 212 includes a first electrode terminal 2127 and a second electrode terminal 2128. Both the first electrode terminal 2127 and the second electrode terminal 2128 are mounted on the cover body 2121. A first through hole 101 for the first electrode terminal 2127 to pass through is provided on the first insulating member 2122, and a second through hole 102 for the second electrode terminal 2128 to pass through is provided on the second insulating member 2123. A region on the inner sidewall of the first through hole 101 close to the first connection end 2122a is configured as a first fixing portion 2122b, and a region on the inner sidewall of the second through hole 102 closest to the second connection end 2123a is configured as a second fixing portion 2123b. It can be understood that the inner sidewall of the first through hole 101 can be fixedly connected to the first electrode terminal 2127 or not move relative to the first electrode terminal 2127. Therefore, a cantilever portion can be formed between the region on the inner sidewall of the first through hole 101 closest to the first connection end 2122a and the first connection end 2122a. Similarly, the inner sidewall of the second through hole 102 can be fixedly connected to the second electrode terminal 2128 or not move relative to the second electrode terminal 2128. Therefore, a cantilever portion can be formed between the region on the inner sidewall of the second through hole 102 closest to the second connection end 2123a and the second connection end 2123a. After the first insulating member 2122, the cover body 2121, and the first electrode terminal 2127 are fixed together, and the second insulating member 2123, the cover body 2121, and the second electrode terminal 2128 are fixed together, since the first connection end 2122a and the second connection end 2123a are connected to each other, the probability that the first insulating member 2122 and the second insulating member 2123 have excessive deformation due to gravity is reduced. At the same time, the gravitational influence on the region at the first through hole 101 and the region at the second through hole 102 is also reduced. In some embodiments of the present application, as shown in FIG. 9, the first insulating member 2122 is provided with a first receiving area 107 for receiving force. The first insulating member 2122 is provided with a first reinforcing member 2122c, and at least a part of the first reinforcing member 2122c is disposed around the first receiving area 107. The first receiving area 107 can receive a force. For example, during the demolding process, the ejector pin can abut against the first receiving area 107, and the ejector pin can apply a force on the first receiving area 107 to eject the first insulating member 2122 from the mold. The first receiving area 107 may have a mark. For example, the mark may be etched on the first receiving area 107, or the mark may also be coated on the first receiving area 107, as long as the first receiving area 107 can facilitate the contact between the ejector pin and the first receiving area 107 after having the mark. The first receiving area 107 may also be a groove with a certain depth, so that the ejector pin can be conveniently engaged with the groove, not only realizing the contact between the ejector pin and the first receiving area 107, but also playing a positioning role. At least a part of the first reinforcing member 2122c is disposed around the first receiving area 107, so that the first reinforcing member 2122c can strengthen the structural strength of the first receiving area 107. The first reinforcing member 2122c may be close to the first receiving area 107, or the first reinforcing member 2122c may also extend to the first receiving area 107, as long as it does not affect the application of the acting force on the first receiving area 107. Thus, after the acting force is applied to the first receiving area 107, for example, during the process of demolding by the ejector pin abutting against the first receiving area 107, the deformation amount of the area around the first receiving area 107 is reduced, and even the deformation amount of the entire first insulating member 2122 is reduced, so that it is convenient for the ejector pin to smoothly demold the first insulating member 2122 and improve the demolding efficiency of the first insulating member 2122. In some embodiments of the present application, the second insulating member 2123 is provided with a second receiving area 108 for receiving a force, and the second insulating member 2123 is provided with a second reinforcing member 2123c, and at least a part of the second reinforcing member 2123c is disposed around the second receiving area 108. The second receiving area 108 can receive an acting force. For example, during the demolding process, the ejector pin can abut against the second receiving area 108, and the ejector pin can apply an acting force on the second receiving area 108, so as to eject the second insulating member 2123 from the mold. The second receiving area 108 may have a mark. For example, the mark may be etched on the second receiving area 108, or the mark may also be coated on the second receiving area 108, as long as the second receiving area 108 can facilitate the contact between the ejector pin and the second receiving area 108 after having the mark. The second receiving area 108 may also be a groove with a certain depth, so that the ejector pin can be conveniently engaged with the groove, not only realizing the contact between the ejector pin and the second receiving area 108, but also playing a positioning role. At least a part of the second reinforcing member 2123c is disposed around the second receiving area 108, so that the second reinforcing member 2123c can strengthen the structural strength of the second receiving area 108. The second reinforcing member 2123c may be close to the second receiving area 108, or the second reinforcing member 2123c may also extend to the second receiving area 108, as long as it does not affect the application of the acting force on the second receiving area 108. Thus, after the acting force is applied to the second receiving area 108, for example, when the ejector pin abuts against the second receiving area 108 to achieve demolding, the deformation amount of the area around the second receiving area 108 is reduced, and even the deformation amount of the entire second insulating member 2123 is reduced, thereby facilitating the smooth demolding of the second insulating member 2123 by the ejector pin and improving the demolding efficiency of the second insulating member 2123. A first through hole 109a may be formed in the first insulating member. The first through hole 109a may be a through hole facing the liquid injection hole. The first through hole 109a may penetrate the first insulating member 2122 along the thickness direction of the first insulating member 2122. A first reinforcing member 2122c is disposed on the first insulating member 2122. The first reinforcing member 2122c may be disposed on at least one of the two side surfaces of the first insulating member 2122 in the thickness direction. The first reinforcing member 2122c may also protrude from the surface of the first insulating member 2122. The first reinforcing member 2122c may be located around the first through hole 109a and close to the first through hole 109a. The first reinforcing member 2122c may be configured as a reinforcing rib, so that the first reinforcing member 2122c can improve the structural strength of the first insulating member 2122. In particular, the first reinforcing member 2122c can improve the structural strength of the area around the first through hole 109a on the first insulating member 2122. Thus, when the ejector pin pushes against the area around the first through hole 109a on the first insulating member 2122 to complete demolding, the deformation amount of the area around the first through hole 109a on the first insulating member 2122 can be reduced, thereby facilitating the ejection of the first insulating member 2122 and improving the demolding efficiency of the first insulating member 2122. A second through hole 109b may be formed in the second insulating member 2123. The second through hole 109b may be a through hole facing the liquid injection hole. The second through hole 109b may penetrate the second insulating member 2123 along the thickness direction of the second insulating member 2123. A second reinforcing member 2123c is disposed on the second insulating member 2123. The second reinforcing member 2123c may be disposed on at least one of the two side surfaces of the second insulating member 2123 in the thickness direction. The second reinforcing member 2123c may also protrude from the surface of the second insulating member 2123. The second reinforcing member 2123c may be located around the second through hole 109b and close to the second through hole 109b. The second reinforcing member 2123c may be configured as a reinforcing rib, so that the second reinforcing member 2123c can improve the structural strength of the second insulating member 2123. In particular, the second reinforcing member 2123c can improve the structural strength of the area around the second through hole 109b on the second insulating member 2123. Thus, when the ejector pin pushes against the area around the second through hole 109b on the second insulating member 2123 to complete demolding, the deformation amount of the area around the second through hole 109b on the second insulating member 2123 can be reduced, thereby facilitating the ejection of the second insulating member 2123 and improving the demolding efficiency of the second insulating member 2123. In some embodiments of the present application, the first reinforcement member 2122c is configured as a plurality of first reinforcement members 2122c, and the plurality of first reinforcement members 2122c are arranged at intervals along the circumference of the first through hole 109a. Processing the first through hole 109a on the first insulating member 2122 will make the strength of the area around the first through hole 109a on the first insulating member 2122 worse. Therefore, arranging the plurality of first reinforcement members 2122c at intervals along the circumference of the first through hole 109a can not only improve the structural strength of the area around the first through hole 109a on the first insulating member 2122, but also improve the strength of the first insulating member 2122. The structural strength of the area around the first through hole 109a on 2122 can also be consistent. In some embodiments of the present application, the first reinforcement member 2122c is an arc-shaped reinforcement rib. Compared with the linear reinforcement rib, the arc-shaped reinforcement rib can better improve the structural strength around the first through hole 109a on the first insulating member 2122, so that when the ejector pin pushes against the area around the first through hole 109a on the first insulating member 2122 to complete the demoulding, the deformation of the area around the first through hole 109a on the first insulating member 2122 can be reduced, so as to facilitate the ejection of the first insulating member 2122 and improve the demoulding efficiency of the first insulating member 2122. According to some embodiments of the present application, since the first reinforcement member 2122c is an arc-shaped reinforcement rib rather than an annular reinforcement rib, the arc-shaped reinforcement rib has a first opening, and the first opening can be arranged away from the first through hole 109a. In other words, the arc-shaped reinforcement rib protrudes toward the direction of the first through hole 109a. This further improves the structural strength of the area around the first through hole 109a on the first insulating member 2122. In some embodiments of the present application, the second reinforcement member 2123c is configured as a plurality of second reinforcement members 2123c, and the plurality of second reinforcement members 2123c are arranged at intervals along the circumference of the second through hole 109b. Processing the second through hole 109b on the second insulating member 2123 will make the strength of the area around the second through hole 109b on the second insulating member 2123 worse, so arranging the plurality of second reinforcement members 2123c at intervals along the circumference of the second through hole 109b can not only improve the structural strength of the area around the second through hole 109b on the second insulating member 2123, but also make the structural strength of the area around the second through hole 109b on the second insulating member 2123 more consistent. In some embodiments of the present application, the second reinforcing member 2123c is an arc-shaped reinforcing rib. Compared with a straight reinforcing rib, the arc-shaped reinforcing rib can better improve the structural strength around the second through hole 109b on the second insulating member 2123. Thus, when the ejector pin pushes against the area around the second through hole 109b on the second insulating member 2123 to complete demolding, the deformation amount of the area around the second through hole 109b on the second insulating member 2123 can be reduced, thereby facilitating the ejection of the second insulating member 2123 and improving the demolding efficiency of the second insulating member 2123. According to some embodiments of the present application, since the second reinforcing member 2123c is an arc-shaped reinforcing rib rather than an annular reinforcing rib, the arc-shaped reinforcing rib has a second opening, and the second opening can be arranged to face away from the second through hole 109b. That is to say, the arc-shaped reinforcing rib protrudes towards the second through hole 109b. Thereby, the structural strength of the area around the second through hole 109b on the second insulating member 2123 is further improved. In some embodiments of the present application, at least a part of the first reinforcing member 2122c is located between the first through hole 109a and the first receiving area 107. That is to say, a part of the first reinforcing member 2122c can be located between the first through hole 109a and the first receiving area 107, and the other part of the first reinforcing member 2122c is only located on the outer periphery of the first receiving area 107; or, the whole of the first reinforcing member 2122c can be located between the first through hole 109a and the first receiving area 107. Thereby, not only the structural strength of the area around the first receiving area 107 can be increased, but also the structural strength of the area around the first through hole 109a can be increased. In some embodiments of the present application, at least a part of the second reinforcing member 2123c is located between the second through hole 109b and the second receiving area 108. That is to say, a part of the second reinforcing member 2123c can be located between the second through hole 109b and the second receiving area 108, and the other part of the second reinforcing member 2123c is only located on the outer periphery of the second receiving area 108; or, the whole of the second reinforcing member 2123c can be located between the second through hole 109b and the second receiving area 108. Thereby, not only the structural strength of the area around the second receiving area 108 can be increased, but also the structural strength of the area around the second through hole 109b can be increased. The battery cell of the embodiment of the present application will be briefly described below. The battery cell according to the embodiment of the present application includes the above-mentioned end cover 212. Since the battery cell according to the embodiment of the present application is provided with the above-mentioned end cover 212, the damage rate of the battery cell is reduced and the service life of the battery cell is improved. The battery cell 20 further includes a housing 211 and an electrode assembly 22. The housing 211 has an open mouth, and the end cover 212 closes the open mouth. The end cover 212 and the housing 211 form a receiving chamber (not shown) for receiving the electrode assembly 22. The battery cell according to the present application may further include an insulating film (not shown). The insulating film wraps the electrode assembly 22. The insulating film may be configured to include a bag-like structure with an open top. The open end of the insulating film may facilitate the welding of the tab to the terminal post. One end of the insulating film may be connected to the first insulating member 2122 and / or the second insulating member 2123. The end of the insulating film formed with the open end may be connected to the first insulating member 2122 and / or the second insulating member 2123. For example, the end of the insulating film formed with the open end may be bonded to the first insulating member 2122 and / or the second insulating member 2123, or the end of the insulating film formed with the open end may be heat-melted to the first insulating member 2122 and / or the second insulating member 2123. Thus, the insulating film, the first insulating member 2122, and the second insulating member 2123 together insulate the electrode assembly from the outer shell and the cover 2121, improving the safety performance of the battery cell and reducing the probability of problems such as short circuit or electric leakage. The battery 100 of the embodiment of the present application will be briefly described below. The battery 100 according to the embodiment of the present application includes the above-mentioned battery cell 20. Since the battery 100 according to the embodiment of the present application is provided with the above-mentioned battery cell 20, the maintenance cost of the battery 100 is reduced, and the service life of the battery is also improved. The electrical device of the embodiment of the present application will be briefly described below. The electrical device according to the embodiment of the present application includes the above-mentioned battery 100. Since the electrical device according to the embodiment of the present application is provided with the above-mentioned battery 100, the maintenance cost of the electrical device is reduced, and the service life is improved. The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An end cap, characterized in that: include: Cover body; A first insulating member, fixedly connected to the cover body, one end of the first insulating member forming a first connecting end; A second insulating member, fixedly connected to the cover body, one end of the second insulating member forming a second connecting end; Wherein, the first connection end and the second connection end are arranged opposite to each other and fixedly connected.

2. The end cap according to claim 1, characterized in that: The first insulating member and the second insulating member are arranged in a first direction; The first insulating member has a first fixing portion fixedly connected to the cover body, and a portion of the first insulating member located between the first fixing portion and the first connecting end is configured as a first suspension segment. In the first direction, the maximum dimension of the first suspension segment is a1, and the minimum thickness of the first suspension segment is t1, satisfying: 40≤a1 / t1≤2100; and / or The second insulating member has a second fixing portion connected to the cover body, and a portion of the second insulating member located between the second fixing portion and the second connection end is constructed as a second suspension segment. In the first direction, the maximum dimension of the second suspension segment is a2, and the minimum thickness of the second suspension segment is t2, satisfying: 40≤a2 / t2≤2100.

3. The end cap according to claim 2, characterized in that: Satisfies: 60≤a1 / t1≤1500, and / or 60≤a2 / t2≤1500.

4. The end cap according to any one of claims 1 to 3, characterized in that: The first connection end and the second connection end are detachably connected.

5. The end cap according to claim 4, characterized in that: The first connection end and the second connection end are clamped.

6. The end cap according to claim 5, characterized in that: The first connection end is provided with a first matching portion, and the second connection end is provided with a second matching portion; The first matching portion is provided with a clamping hole, the second matching portion is constructed as an elastic member, and the size of the free end of the second matching portion is larger than the size of the clamping hole, so that the free end of the second matching portion can be clamped and matched with the first matching portion after passing through the clamping hole.

7. The end cap according to claim 6, characterized in that: The first connecting end is provided with a first protrusion, the first protrusion protrudes in a direction away from the cover body, and the first matching portion is provided on the first protrusion.

8. The end cap according to claim 7, characterized in that: The first insulating member is further provided with a second protrusion, which protrudes in a direction away from the cover body, and the second insulating member is provided with a third protrusion, which protrudes in a direction away from the cover body.

9. The end cap according to any one of claims 1 to 8, characterized in that: The first connection end and the second connection end are bonded and fixed.

10. The end cap according to any one of claims 1 to 9, characterized in that: The first connection end and the second connection end are fixedly connected by a fastener.

11. The end cap according to any one of claims 2 or 3, characterized in that: The end cap comprises a first electrode terminal and a second electrode terminal, wherein the first electrode terminal and the second electrode terminal are both mounted on the cover body; The first insulating member is provided with a first via hole for the first electrode terminal to pass through, and the second insulating member is provided with a second via hole for the second electrode terminal to pass through. The area on the inner side wall of the first via hole closest to the first connecting end is configured as the first fixing portion, and the area on the inner side wall of the second via hole closest to the second connecting end is configured as the second fixing portion.

12. The end cap according to any one of claims 1 to 11, characterized in that: The first insulating member is provided with a first receiving area for receiving the applied force, the first insulating member is provided with a first reinforcing member, and at least a part of the first reinforcing member is provided around the first receiving area; and / or The second insulating member is provided with a second receiving area for receiving the force, and the second insulating member is provided with a second reinforcing member, at least a part of the second reinforcing member is arranged around the second receiving area.

13. The end cap according to claim 12, characterized in that: The first insulating member is provided with a first through hole, and the first reinforcing member is located at the periphery of the first through hole. The second insulating member is provided with a second through hole, and the second reinforcing member is located at the periphery of the second through hole.

14. The end cap according to claim 13, characterized in that: The first reinforcement is configured in plurality and the plurality of the first reinforcements are arranged at intervals along the circumference of the first through hole. The second reinforcement is configured in plurality and the plurality of the second reinforcements are arranged at intervals along the circumference of the second through hole.

15. The end cap according to claim 13 or 14, characterized in that: The first reinforcement member is arc-shaped and has a first opening, the first opening is away from the first through hole, and the second reinforcement member is arc-shaped and has a second opening, the second opening is away from the second through hole.

16. The end cap according to any one of claims 13 to 15, characterized in that: At least a portion of the first reinforcement member is located between the first through hole and the first receiving area, and at least a portion of the second reinforcement member is located between the second through hole and the second receiving area.

17. A battery cell, characterized in that: Comprising the end cap as claimed in any one of claims 1-16.

18. The battery cell according to claim 17, characterized in that: The battery cell further comprises a shell and an electrode assembly, the shell having an open opening, the end cover closing the open opening, and the end cover and the shell forming a receiving chamber for receiving the electrode assembly; The battery cell further includes an insulating film, the insulating film wraps the electrode assembly, and one end of the insulating film is connected to the first insulating member and / or the second insulating member.

19. A battery, characterized in that: Comprising the battery cell according to claim 17 or 18.

20. An electrical equipment, characterized in that: Comprising the battery of claim 19.

Images