Battery cell, adapter plate, battery device, energy storage device, and power consuming device

Abstract

The embodiment of the application provides a battery monomer, a adapter sheet, a battery device, an energy storage device and a power utilization device, and belongs to the technical field of batteries. The battery monomer comprises: a shell; an electrode assembly arranged in the shell; a cover plate assembly installed on the shell; and an adapter sheet comprising a first section, a second section and a third section connected in sequence, wherein the wall thickness of the first section is smaller than the wall thickness of the second section and the third section, the first section is connected with a tab of the electrode assembly, the third section is connected with a pole of the cover plate assembly, a first projection and a second projection do not coincide, the first projection is an orthogonal projection of the second section along a distribution direction of the cover plate assembly and the electrode assembly, and the second projection is an orthogonal projection of an end of a current collector of the tab away from the electrode assembly along the distribution direction. The adapter sheet is arranged as the first section, the second section and the third section connected in sequence, and the wall thickness of the first section is smaller than the wall thickness of the second section and the third section, so that the available bending space of the tab can be increased, thereby increasing the capacity of the battery monomer and improving the overcurrent capacity.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery cell, adapter, battery device, energy storage device, and power consumption device. Background Technology

[0002] Related technologies aim to increase the capacity of battery cells without increasing their external dimensions, but this leads to an increase in the space occupied by the internal electrode components of the battery cell, a reduction in the available space for the tabs, and an impact on overcurrent capability, leaving room for improvement. Utility Model Content

[0003] This application provides a battery cell, adapter plate, battery device, energy storage device, and power consumption device, which can increase the capacity of the battery cell while improving its overcurrent capability.

[0004] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0005] shell;

[0006] Electrode assembly, disposed within the housing;

[0007] Cover assembly, mounted on the housing;

[0008] The adapter plate includes a first segment, a second segment, and a third segment connected in sequence. The wall thickness of the first segment is less than the wall thickness of the second segment and the third segment. The first segment is connected to the tab of the electrode assembly, and the third segment is connected to the post of the cover plate assembly. The first projection and the second projection do not coincide. The first projection is the orthographic projection of the second segment along the distribution direction of the cover plate assembly and the electrode assembly, and the second projection is the orthographic projection of the end of the tab away from the current collector of the electrode assembly along the distribution direction.

[0009] In the above technical solution, the adapter piece is configured as a first segment, a second segment, and a third segment connected in sequence, and the wall thickness of the first segment on the adapter piece used for connecting with the tab is less than the wall thickness of the second segment and the third segment. This can increase the available bending space of the tab, thereby increasing the capacity of the battery cell while improving the current carrying capacity of the battery cell.

[0010] In some embodiments, the surface of the second segment facing the electrode assembly protrudes toward the electrode assembly relative to the surface of the first segment facing the electrode assembly.

[0011] In the above technical solution, the tab of the electrode assembly is connected to the surface of the first segment facing the electrode assembly, which can reduce the portion of the tab protruding from the second segment in the direction close to the electrode assembly after connection, thereby reducing the space occupied by the adapter piece inside the battery cell and increasing the available bending space of the tab.

[0012] In some embodiments, the tab includes a bent section, and the free end of the bent section is bent away from the cover plate assembly relative to the root of the bent section. The surface of the first section facing the electrode assembly is connected to the surface of the bent section facing the cover plate assembly, and the distance from the surface of the first section facing the cover plate assembly to the cover plate assembly is not less than the distance from the root of the bent section to the cover plate assembly.

[0013] In the above technical solution, the distance from the surface of the first segment facing the cover plate assembly to the cover plate assembly is not less than the distance from the root of the electrode tab to the cover plate assembly, which can provide sufficient bending space for the electrode tab.

[0014] In some embodiments, the surface of the first segment facing the cover assembly is flush with the surface of the second segment facing the cover assembly.

[0015] In the above technical solution, the surface of the first segment facing the cover plate assembly is flush with the surface of the second segment facing the cover plate assembly, which can reduce the space occupied by the adapter piece and thus improve the space utilization rate of the battery cell.

[0016] In some embodiments, the wall thickness of the second segment is T, and the wall thickness of the first segment is C, satisfying: C≤0.65T.

[0017] In the above technical solution, the wall thickness of the first segment is no more than 0.65 times the wall thickness of the second segment, which can reduce the space occupied by the adapter piece and thus improve the space utilization rate of the battery cell.

[0018] In some embodiments, the orthographic projection of the third segment along the distribution direction of the cover plate assembly and the electrode assembly does not coincide with the second projection.

[0019] In some embodiments, the main body portion of the third segment is bent relative to the second segment toward the direction of the electrode assembly.

[0020] In the above technical solution, the main body of the third segment is bent relative to the second segment toward the electrode assembly, which can reduce the space occupied by the adapter piece and thus improve the space utilization of the battery cell.

[0021] In some embodiments, the third segment includes:

[0022] The main body is connected to the second paragraph;

[0023] A connecting structure is provided on the main body portion, and is equivalent to the main body portion protruding towards the cover plate assembly, and is connected to the pole post.

[0024] In the above technical solution, the main body protrudes towards the cover plate assembly to form the connection structure, which can reduce the space occupied by the adapter piece and thus improve the space utilization rate of the battery cell.

[0025] In some embodiments, the second segment is connected to the first segment on both sides that are spaced apart relative to each other along the width direction of the battery cell, and the two first segments of the adapter are respectively connected to tabs that are spaced apart relative to each other along the width direction of the battery cell and have the same polarity.

[0026] In the above technical solution, the two first segments of the adapter piece are respectively connected to the tabs that are spaced apart from each other along the width direction of the battery cell and have the same polarity, and the connection structure of the third segment of the adapter piece is connected to the pole of the cover plate assembly, thereby forming the current flow path of the adapter piece.

[0027] Secondly, embodiments of this application provide an adapter piece applied to a battery cell. The adapter piece includes a first segment, a second segment, and a third segment connected in sequence. The wall thickness of the first segment is less than the wall thickness of the second segment and the third segment. The first segment has a connecting surface for connecting with the tab of the battery cell, and the third segment has a connecting structure for connecting with the terminal post of the battery cell.

[0028] Thirdly, embodiments of this application provide a battery device comprising: a plurality of battery cells as described in any one of the above-mentioned embodiments.

[0029] Fourthly, embodiments of this application provide an energy storage device, including a plurality of battery cells as described in any one of the above descriptions or a plurality of battery devices as described above, wherein the battery cells or the battery devices are used to store or provide electrical energy.

[0030] Fifthly, embodiments of this application provide an energy storage system, a power conversion device, and an energy storage device as described above, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0031] Sixthly, embodiments of this application provide an electrical device, such as a battery cell, battery device, energy storage device, or energy storage system as described above, wherein the battery cell or battery device is used to store or provide electrical energy.

[0032] In a seventh aspect, embodiments of this application provide a charging network, a charging pile, and an energy storage device or an energy storage system as described above, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This application provides schematic diagrams of the structure of an energy storage system according to some embodiments.

[0035] Figure 2 This is a schematic diagram of the structure of a charging network provided in some embodiments of this application;

[0036] Figure 3 This application provides structural schematic diagrams of vehicles for some embodiments;

[0037] Figure 4 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0038] Figure 5 Exploded views of the structure of a single battery cell provided in some embodiments of this application;

[0039] Figure 6 Cross-sectional views of a battery cell provided in some embodiments of this application;

[0040] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0041] Figure 8 This is one of the structural schematic diagrams of the adapter piece for a battery cell provided in some embodiments of this application;

[0042] Figure 9 This is a second schematic diagram of the structure of the adapter piece for a battery cell provided in some embodiments of this application;

[0043] Figure 10 for Figure 9 Sectional view at point BB.

[0044] Figure label:

[0045] Energy storage device 1, power conversion device 2, power generation device 3, charging pile 4, connector 5;

[0046] 1000 vehicles;

[0047] Battery device 100;

[0048] Box 10, first box body 11, second box body 12;

[0049] 20 battery cells;

[0050] Casing 210;

[0051] Electrode assembly 220, tab 221, current collector body 222, bending section 223;

[0052] Cover plate assembly 230, pole post 231;

[0053] Adapter piece 240, first segment 241, second segment 242, third segment 243, main body 244, connecting structure 245;

[0054] Controller 200; Motor 300. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0057] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0061] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0062] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0063] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0064] A battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive current collector includes a current collector body and a positive electrode tab. The positive active material layer is coated on the surface of the current collector body, while the positive electrode tab is not coated with the positive active material layer and protrudes from the current collector body. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative current collector includes a current collector body and a negative electrode tab. The negative active material layer is coated on the surface of the current collector body, while the negative electrode tab is not coated with the negative active material layer and protrudes from the current collector body. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0065] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0066] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. Individual battery cells are used to store or provide electrical energy.

[0067] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0068] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0069] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0070] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0071] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0072] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0073] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0074] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0075] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0076] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The battery device is used to store or provide electrical energy.

[0077] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0078] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0079] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0080] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0081] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0082] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0083] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0084] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0085] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0086] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0087] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use energy storage devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The energy storage device is used to store or provide electrical energy.

[0088] In some embodiments, such as Figure 1As shown, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS), wherein the power converter system 2 is used to connect the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter system 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0089] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use energy storage systems, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. Energy storage devices are used to store or provide electrical energy.

[0090] Please refer to Figure 2 This application provides a charging network including a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 provides electrical energy to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to electrical devices (such as vehicles) to replenish energy to the electrical devices.

[0091] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0092] This application provides an electrical device that uses a single battery cell, battery device, energy storage device, or energy storage system as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0093] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0094] Please refer to Figure 3 , Figure 3This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0095] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0096] Please refer to Figure 4 , Figure 4 This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other, and together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0097] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0098] Please refer to Figure 4 , Figure 4 This is a partial structural schematic diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 20, which are arranged along a first direction X. Each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction Y. The first direction X and the second direction Y are the length direction and the width direction of the housing 10, respectively, and the first direction X and the second direction Y are perpendicular to each other.

[0099] According to some embodiments of this application, refer to Figures 5-7 Please refer to further details. Figure 8 . Figure 5 This is an exploded view of the structure of a battery cell 20 provided in some embodiments of this application. Figure 6 This is a cross-sectional view of a battery cell 20 provided in some embodiments of this application. Figure 7 for Figure 6 A magnified view of a section at point B. Figure 8 This is one of the structural schematic diagrams of the adapter piece 240 of the battery cell 20 provided in some embodiments of this application. This application provides a battery cell 20, including: a housing 210, an electrode assembly 220, a cover plate assembly 230, and an adapter piece 240, wherein the electrode assembly 220 is disposed inside the housing 210, the cover plate assembly 230 is installed on the housing 210, and the adapter piece 240 connects the tab 221 of the electrode assembly 220 and the terminal post 231 of the cover plate assembly 230.

[0100] The battery cell 20 is the smallest unit that constitutes the power battery system. Each battery cell 20 has independent energy storage and output capabilities. The battery cell 20 is mainly composed of the outer shell 210, electrode assembly 220 and cover plate assembly 230. These parts work together to enable the battery cell 20 to safely and efficiently store and release energy.

[0101] The outer casing 210 is the external protective structure of the battery cell 20. The outer casing 210 is usually made of high-strength and corrosion-resistant materials such as metal or plastic, and mainly plays a role in protection and sealing. The outer casing 210 can effectively reduce the damage to the electrode assembly 220 and other internal components caused by external collisions or compression.

[0102] The electrode assembly 220 is the core part of the battery cell 20 and is used to store electrical energy. The electrode assembly 220 is located inside the housing 210 and is connected to the external circuit through the cover assembly 230 to realize the transfer of electrical energy between the battery cells 20. The electrode assembly 220 is typically composed of key components such as positive electrode, negative electrode, electrolyte and separator. The positive electrode and negative electrode store and release energy respectively, the electrolyte is responsible for transferring ions between the positive and negative electrodes, and the separator is used to separate the positive and negative electrodes to reduce the risk of short circuit.

[0103] The cover assembly 230 is the top structure of the battery cell 20. It is fixed to the outer casing 210 by welding or other means to enhance the integrity and sealing of the battery cell 20. The cover assembly 230 is usually provided with a positive terminal 231 and a negative terminal 231. The terminal 231 is used to connect the battery cell 20 to the external circuit. Safety components such as explosion-proof valves or sealing rings can also be provided on the cover assembly 230 to further improve the safety performance of the battery.

[0104] When the battery cell 20 is charging, the external power source provides electrical energy to the electrode assembly 220 through the positive terminal 231 and the negative terminal 231. The chemical reaction in the electrode assembly 220 converts electrical energy into chemical energy and stores it in the electrode assembly 220. When the battery cell 20 is discharging, the chemical reaction in the electrode assembly 220 converts chemical energy into electrical energy and provides electrical energy to the external circuit through the positive terminal 231 and the negative terminal 231.

[0105] It is understandable that the battery cell 20, as the smallest unit of the power battery system, can improve the safety and reliability of the battery cell 20 through the cooperation of the casing 210, electrode assembly 220 and cover plate assembly 230, and help the battery cell 20 to safely and efficiently store and release energy.

[0106] The battery cell 20 also includes an adapter piece 240, which connects the electrode assembly 220 and the cover plate assembly 230. The adapter piece 240 mainly serves as a bridge for current transmission between the electrode assembly 220 and the cover plate assembly 230. The adapter piece 240 has good conductivity, which helps the smooth transmission of current. For example, in the battery cell 20, the current is transmitted from the negative electrode tab 221 on the electrode assembly 220 to the negative electrode post 231 on the cover plate assembly 230 through the adapter piece 240, and then to the external circuit or other battery cells 20 electrically connected to the negative electrode post 231. At the same time, the current from the external circuit or other battery cells 20 can be transmitted from the positive electrode post 231 to the positive electrode tab 221 through the adapter piece 240, thereby forming a complete current loop.

[0107] In addition, the battery cell 20 generates a certain amount of heat during charging and discharging. As part of the battery, the adapter 240 can also play a certain role in heat conduction, which helps to conduct heat from the inside of the battery to the outside, thereby maintaining the temperature stability of the battery cell 20.

[0108] For example, the adapter 240 is typically made of a metal material with good electrical conductivity, such as copper, aluminum, or copper alloys.

[0109] In this embodiment, the adapter piece 240 may include a first segment 241, a second segment 242, and a third segment 243 connected in sequence. The first segment 241 is connected to the tab 221 of the electrode assembly 220, the third segment 243 is connected to the post 231 of the cover plate assembly 230, the second segment 242 is connected between the first segment 241 and the third segment 243, and the wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243.

[0110] like Figure 8 As shown, the wall thickness of the first segment 241 is less than that of the second segment 242, and one side of the first segment 241 is flush with one side of the second segment 242. That is, the projection of the first segment 241 along the horizontal direction is located within the projection of the second segment 242 along the horizontal direction. The tab 221 of the electrode assembly 220 is connected to the side of the first segment 241 that is not flush with one side of the second segment 242. This can reduce the portion of the tab 221 that extends beyond the second segment 242 in the vertical direction after connection, thereby reducing the space occupied by the adapter 240 inside the battery cell 20.

[0111] Meanwhile, the first projection and the second projection do not coincide. The first projection is the orthographic projection of the second segment 242 along the distribution direction of the cover plate assembly 230 and the electrode assembly 220. The second projection is the orthographic projection of the end of the tab 221 away from the current collector body 222 of the electrode assembly 220 along the distribution direction. In other words, the end of the tab 221 away from the current collector body 222 of the electrode assembly 220 is connected to the first segment 241, and the orthographic projection of this end along the distribution direction of the cover plate assembly 230 and the electrode assembly 220 falls on the first segment 241.

[0112] Taking the distribution direction of the cover plate assembly 230 and the electrode assembly 220 as the vertical direction as an example, the thickness direction of the adapter piece 240 is also the vertical direction. At this time, the first segment 241 is located on both sides of the second segment 242 along the horizontal direction. The tab 221 of the electrode assembly 220 is connected to one side of the first segment 241 along the vertical direction. That is, the orthographic projections of the first segment 241 and the second segment 242 along the vertical direction do not coincide, and the orthographic projections of the tab 221 and the second segment 242 along the vertical direction also do not coincide.

[0113] It should be noted that the adapter piece 240 of this solution can be applied to multi-roll electrode assemblies, such as dual-roll electrode assemblies, or to single-roll electrode assemblies. When the adapter piece 240 is applied to a dual-roll electrode assembly, the first segment 241 is located on opposite sides of the second segment 242 along the width direction. When the adapter piece 240 is applied to a single-roll electrode assembly, the first segment 241 is also located on opposite sides of the second segment 242 along the length direction.

[0114] In related technologies, in order to enable the battery device to obtain sufficient power, multiple battery cells inside the battery device are usually stacked in an arranged manner. Each battery cell includes a shell, an electrode assembly, a cover assembly, and an adapter plate. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The tabs of the electrode assembly and the terminals of the cover assembly are connected by an adapter plate. Current can be transferred between the electrode assembly and the cover assembly through the adapter plate, thereby realizing the charging and discharging of the battery cell.

[0115] However, with the internal space of a single battery cell remaining constant, the capacity requirements of the battery cell are gradually increasing. The increased internal space occupied by the electrode assembly will reduce the available bending space of the tabs, affecting the overcurrent capacity, and there is room for improvement.

[0116] Based on the above considerations, in order to solve the problem of insufficient available bending space for the tab 221, this application provides a battery cell 20, including: a housing 210, an electrode assembly 220, a cover assembly 230, and an adapter piece 240, wherein the electrode assembly 220 is disposed inside the housing 210, the cover assembly 230 is mounted on the housing 210, and the adapter piece 240 includes a first segment 241, a second segment 242, and a third segment 243 connected in sequence. The wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243. The first segment 241 is connected to the tab 221 of the electrode assembly 220, and the third segment 243 is connected to the terminal post 231 of the cover assembly 230. The orthographic projection of the second segment 242 along the distribution direction of the cover assembly 230 and the electrode assembly 220 does not coincide with the orthographic projection of the tab 221 along the distribution direction.

[0117] In this type of battery cell 20, the overall current carrying capacity of the adapter piece 240 is determined by the section with the smallest wall thickness. The wall thickness of the first section 241 is less than that of the second section 242 and the third section 243. However, the overall thickness of the first section 241 after being connected to the tab 221 is greater than that of the second section 242 and the third section 243. Designing the wall thickness of the second section 242 to be greater than that of the first section 241 can enhance the overall current carrying capacity of the adapter piece 240.

[0118] Furthermore, the first segment 241 on the adapter piece 240, which is used to connect with the tab 221, is designed as a partially thinned structure, so that the wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243. This can increase the available bending space of the tab 221. At the same time, when the adapter piece 240 is connected to the tab 221, the sum of the thicknesses of the adapter piece 240 and the tab 221 is large, which has good current carrying capacity. Thus, the capacity of the battery cell 20 is increased while the current carrying capacity of the battery cell 20 is improved.

[0119] According to the battery cell 20 provided in the embodiments of this application, the adapter piece 240 is configured as a first segment 241, a second segment 242, and a third segment 243 connected in sequence, and the wall thickness of the first segment 241 on the adapter piece 240 for connecting with the tab 221 is less than the wall thickness of the second segment 242 and the third segment 243. This can increase the available bending space of the tab 221, thereby increasing the capacity of the battery cell 20 while improving the current carrying capacity of the battery cell 20.

[0120] According to some embodiments of this application, refer to Figure 6 Please refer to further details. Figure 7 and Figure 8 The surface of the second segment 242 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the first segment 241 facing the electrode assembly 220.

[0121] In this embodiment, the first segment 241 of the adapter piece 240 is connected to the tab 221 of the electrode assembly 220, the third segment 243 of the adapter piece 240 is connected to the post 231 of the cover plate assembly 230, and the second segment 242 of the adapter piece 240 is connected between the first segment 241 and the third segment 243. The wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243. The surface of the first segment 241 facing away from the electrode assembly 220 is flush with the surface of the second segment 242 facing away from the electrode assembly 220. The surface of the second segment 242 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the first segment 241 facing the electrode assembly 220.

[0122] The tab 221 of the electrode assembly 220 is connected to the surface of the first segment 241 facing the electrode assembly 220. This can reduce the portion of the tab 221 that protrudes from the second segment 242 towards the electrode assembly 220 after connection, thereby reducing the space occupied by the adapter 240 inside the battery cell 20 and increasing the available bending space of the tab 221.

[0123] According to some embodiments of this application, please refer to Figure 7 As shown, the tab 221 includes a bent section 223, and the free end of the bent section 223 is bent away from the root of the bent section 223 in a direction away from the cover plate assembly 230. The surface of the first section 241 facing the electrode assembly 220 is connected to the surface of the bent section 223 facing the cover plate assembly 230, and the distance from the surface of the first section 241 facing the cover plate assembly 230 to the cover plate assembly 230 is not less than the distance from the root of the bent section 223 to the cover plate assembly 230.

[0124] In this embodiment, the free end of the bent section 223 is the end of the bent section 223 of the tab 221 that is away from the electrode assembly 220. The free end of the bent section 223 is bent away from the cover plate assembly 230 relative to the root of the bent section 223, that is, the free end of the bent section 223 is bent towards the electrode assembly 220.

[0125] The surface of the second segment 242 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the first segment 241 facing the electrode assembly 220. The surface of the first segment 241 facing the electrode assembly 220 is connected to the surface of the bent segment 223 facing the cover plate assembly 230. After connection, the surface of the bent segment 223 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the second segment 242 facing the electrode assembly 220.

[0126] In addition, the distance from the surface of the first segment 241 facing the cover plate assembly 230 to the cover plate assembly 230 is not less than the distance from the root of the bent segment 223 to the cover plate assembly 230, which can provide sufficient bending space for the bent segment 223 of the tab 221.

[0127] According to some embodiments of this application, see Figure 5 and Figure 7 As shown, the surface of the first segment 241 facing the cover plate assembly 230 is flush with the surface of the second segment 242 facing the cover plate assembly 230.

[0128] In this embodiment, the surface of the first segment 241 facing the cover plate assembly 230 is flush with the surface of the second segment 242 facing the cover plate assembly 230, and the wall thickness of the first segment 241 is less than the wall thickness of the second segment 242. Then, the surface of the second segment 242 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the first segment 241 facing the electrode assembly 220.

[0129] In the above embodiment, the surface of the first segment 241 facing the cover plate assembly 230 is flush with the surface of the second segment 242 facing the cover plate assembly 230, which can reduce the space occupied by the adapter piece 240 and thus improve the space utilization of the battery cell 20.

[0130] According to some embodiments of this application, please continue to refer to Figure 9 and Figure 10 As shown, Figure 9 This is the second schematic diagram of the structure of the adapter piece 240 of the battery cell 20 provided in some embodiments of this application. Figure 10 for Figure 9 The cross-sectional view at point AA. The wall thickness of the second segment 242 is T, and the wall thickness of the first segment 241 is C, where C ≤ 0.65T.

[0131] In this embodiment, the wall thickness of the second segment 242 is defined as T, the wall thickness of the first segment 241 is defined as C, and the difference between the wall thickness of the second segment 242 and the wall thickness of the first segment 241 is the thinning thickness of the first segment 241. At the same time, the thinning thickness of the first segment 241 is the bending space of the tab 221 that can be saved.

[0132] In addition, the wall thickness C of the first segment 241 is no more than 0.65 times the wall thickness T of the second segment 242, which means that the maximum bending space that can be saved for the tab 221 is 0.35 times the wall thickness T of the second segment 242.

[0133] According to some embodiments of this application, the orthographic projection of the third segment 243 along the distribution direction of the cover plate assembly 230 and the electrode assembly 220 does not coincide with the second projection.

[0134] In this embodiment, the second projection is the orthographic projection of the end of the current collector body 222 of the tab 221 away from the electrode assembly 220 along the distribution direction. The orthographic projection of the third segment 243 along the distribution direction of the cover plate assembly 230 and the electrode assembly 220 does not coincide with the orthographic projections of the first segment 241 and the second segment 242 along the distribution direction. The second projection only coincides with the orthographic projection of the first segment 241 along the distribution direction.

[0135] According to some embodiments of this application, such as Figure 8 As shown, the main body 244 of the third segment 243 bends toward the electrode assembly 220 relative to the second segment 242.

[0136] In this embodiment, the main body portion 244 of the third segment 243 is bent toward the electrode assembly 220 relative to the second segment 242, that is, the surface of the main body portion 244 of the third segment 243 toward the electrode assembly 220 protrudes toward the electrode assembly 220 relative to the surface of the second segment 242 toward the electrode assembly 220, and a bent portion is formed at the connection between the main body portion 244 of the second segment 242 and the third segment 243.

[0137] The main body 244 of the third segment 243 is bent toward the electrode assembly 220 relative to the second segment 242, which can reduce the space occupied by the adapter piece 240 and thus improve the space utilization of the battery cell 20.

[0138] According to some embodiments of this application, such as Figure 8 As shown, the third segment 243 includes a main body 244 and a connecting structure 245. The main body 244 is connected to the second segment 242, and the connecting structure 245 is located on the main body 244. The main body 244 protrudes towards the cover plate assembly 230 and is connected to the pole post 231.

[0139] In this embodiment, the third segment 243 includes a main body portion 244, which is connected to the second segment 242, and the surface of the main body portion 244 of the third segment 243 facing the electrode assembly 220 protrudes toward the electrode assembly 220 relative to the surface of the second segment 242 facing the electrode assembly 220.

[0140] In addition, the main body 244 protrudes towards the cover plate assembly 230 to form a connecting structure 245. The connecting structure 245 is mainly used to connect with the electrode post 231. The surface of the connecting structure 245 protrudes towards the cover plate assembly 230 and is recessed towards the electrode assembly 220, so that the thickness of the connecting structure 245 is not much different from the thickness of the main body 244.

[0141] According to some embodiments of this application, such as Figure 5 and Figure 8 As shown, the second segment 242 is connected to the first segment 241 on both sides that are relatively spaced apart along the width direction of the battery cell 20. The two first segments 241 of the adapter piece 240 are respectively connected to the tabs 221 that are relatively spaced apart along the width direction of the battery cell 20 and have the same polarity.

[0142] In this embodiment, the electrode assembly 220 includes tabs 221 that are spaced apart from each other along the width direction of the battery cell 20 and have the same polarity. The tabs 221 with the same polarity are located at the same end of the electrode assembly 220, and the electrode assembly 220 has tabs 221 with different polarities at both ends along the height direction of the battery cell 20.

[0143] Taking the width direction of the battery cell 20 as the same as the width direction of the second segment 242 as an example, the second segment 242 is connected to the first segment 241 on both sides that are relatively spaced apart along the width direction of the battery cell 20, and the second segment 242 is connected to the third segment 243 at one end along the length direction of the battery cell 20. The length of the first segment 241 is the same as the length of the second segment 242, and the width of the third segment 243 is the same as the width of the second segment 242.

[0144] The two first segments 241 of the adapter piece 240 are respectively connected to the tabs 221 that are spaced apart from each other along the width direction of the battery cell 20 and have the same polarity. The connection structure 245 of the third segment 243 of the adapter piece 240 is connected to the terminal post 231 of the cover plate assembly 230, thereby forming the current flow path of the adapter piece 240.

[0145] According to some embodiments of this application, a temperature rise simulation experiment was conducted on a battery cell 20 using the adapter 240 of this application.

[0146] In this embodiment, the cover plate assembly 230 is located at both ends of the battery cell 20 along the height direction. One cover plate assembly 230 is provided with a positive electrode post 231, and the other cover plate assembly 230 is provided with a negative electrode post 231. The electrode assembly 220 is located inside the battery cell 20 and is spaced apart from the cover plate assembly 230. The electrode assembly 220 is provided with a positive electrode tab 221 and a negative electrode tab 221 at both ends along the height direction of the battery cell 20, and there are two positive electrode tabs 221 and two negative electrode tabs 221.

[0147] The adapter 240 of this application is connected between the positive electrode post 231 and the positive electrode tab 221, and the negative electrode post and the negative electrode tab are connected by a conventional adapter to obtain the experimental group battery cell 20. Temperature rise simulation experiments are carried out on the above experimental group battery cell 20 and the control group battery cell that uses conventional adapters for both positive and negative electrodes, and the temperature difference of the positive electrode adapter between the experimental group battery cell 20 and the control group battery cell is compared.

[0148] The temperature rise simulation experiment was conducted under the condition that the battery cell operates at 1300A for 10s. The temperature of the positive electrode adapter 240 of the experimental group battery cell 20 was 79.6℃, while the temperature of the positive electrode adapter of the control group battery cell was 91℃. Compared with the control group battery cell, the temperature of the positive electrode adapter 240 of the experimental group battery cell 20 decreased by nearly 12℃, which means that the adapter 240 of this application has a higher current carrying capacity than conventional adapters.

[0149] According to some embodiments of this application, such as Figures 8-10 As shown, this application also provides an adapter piece 240 applied to a battery cell 20. The adapter piece 240 includes a first segment 241, a second segment 242, and a third segment 243 connected in sequence. The wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243. The first segment 241 has a connection surface for connecting with the tab 221 of the battery cell 20, and the third segment 243 has a connection structure 245 for connecting with the terminal post 231 of the battery cell 20.

[0150] In this embodiment, the adapter piece 240 is connected between the electrode assembly 220 and the cover plate assembly 230, and is mainly used as a bridge for current transmission between the electrode assembly 220 and the cover plate assembly 230. The adapter piece 240 has good conductivity, which helps the smooth transmission of current. The adapter piece 240 may include a first segment 241, a second segment 242 and a third segment 243 connected in sequence. The first segment 241 is connected to the tab 221 of the electrode assembly 220, the third segment 243 is connected to the pole post 231 of the cover plate assembly 230 through the connecting structure 245, the second segment 242 is connected between the first segment 241 and the third segment 243, and the wall thickness of the first segment 241 is smaller than the wall thickness of the second segment 242 and the third segment 243.

[0151] like Figure 10 As shown, the wall thickness of the first segment 241 is less than that of the second segment 242, and one side of the first segment 241 is flush with one side of the second segment 242. That is, the projection of the first segment 241 along the horizontal direction is located within the projection of the second segment 242 along the horizontal direction. The tab 221 of the electrode assembly 220 is connected to the side of the first segment 241 that is not flush with one side of the second segment 242. This can reduce the portion of the tab 221 that extends beyond the second segment 242 after connection, thereby reducing the space occupied by the adapter 240 inside the battery cell 20.

[0152] For example, the adapter 240 is typically made of a metal material with good electrical conductivity, such as copper, aluminum, or copper alloys.

[0153] According to some embodiments of this application, this application also provides a battery device 100, which includes a plurality of battery cells 20 of any of the above embodiments.

[0154] According to some embodiments of this application, this application also provides an electrical device including a battery device 100 of any of the above schemes, and the battery device 100 is used to provide electrical energy to the electrical device.

[0155] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0156] According to some embodiments of this application, see Figures 5-10 As shown, this application provides a battery cell 20, including: a housing 210, an electrode assembly 220, a cover assembly 230, and an adapter piece 240. The electrode assembly 220 is disposed inside the housing 210, the cover assembly 230 is mounted on the housing 210, and the adapter piece 240 includes a first segment 241, a second segment 242, and a third segment 243 connected in sequence. The wall thickness of the first segment 241 is less than the wall thickness of the second segment 242 and the third segment 243. The first segment 241 is connected to the tab 221 of the electrode assembly 220, and the third segment 243 is connected to the terminal post 231 of the cover assembly 230. The first projection and the second projection do not coincide. The first projection is the orthographic projection of the second segment 242 along the distribution direction of the cover assembly 230 and the electrode assembly 220, and the second projection is the orthographic projection along the distribution direction of the end of the tab 221 away from the current collector body 222 of the electrode assembly 220. The surface of the second segment 242 facing the electrode assembly 220 protrudes towards the electrode assembly 220 relative to the surface of the first segment 241 facing the electrode assembly 220. The tab 221 includes a bent segment 223, and the free end of the bent segment 223 is bent away from the cover plate assembly 230 relative to its root. The surface of the first segment 241 facing the electrode assembly 220 is connected to the surface of the bent segment 223 facing the cover plate assembly 230, and the distance from the surface of the first segment 241 facing the cover plate assembly 230 to the cover plate assembly 230 is not less than the distance from the root of the bent segment 223 to the cover plate assembly 230. The orthographic projection of the third segment 243 along the distribution direction of the cover plate assembly 230 and the electrode assembly 220 does not coincide with the second projection. The main body portion 244 of the third segment 243 is bent towards the electrode assembly 220 relative to the second segment 242.

[0157] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0158] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0159] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, characterized in that, include: shell; Electrode assembly, disposed within the housing; Cover assembly, mounted on the housing; The adapter plate includes a first segment, a second segment, and a third segment connected in sequence. The wall thickness of the first segment is less than that of the second segment. The first segment is connected to the tab of the electrode assembly, and the third segment is connected to the post of the cover plate assembly. The first projection and the second projection do not coincide. The first projection is the orthographic projection of the second segment along the distribution direction of the cover plate assembly and the electrode assembly, and the second projection is the orthographic projection of the end of the tab away from the current collector body of the electrode assembly along the distribution direction.

2. The battery cell according to claim 1, characterized in that, The surface of the second segment facing the electrode assembly protrudes towards the electrode assembly relative to the surface of the first segment facing the electrode assembly.

3. The battery cell according to claim 2, characterized in that, The electrode tab includes a bent section, and the free end of the bent section is bent away from the cover plate assembly relative to the root of the bent section. The surface of the first section facing the electrode assembly is connected to the surface of the bent section facing the cover plate assembly, and the distance from the surface of the first section facing the cover plate assembly to the cover plate assembly is not less than the distance from the root of the bent section to the cover plate assembly.

4. The battery cell according to claim 2, characterized in that, The surface of the first segment facing the cover assembly is flush with the surface of the second segment facing the cover assembly.

5. The battery cell according to claim 1, characterized in that, The wall thickness of the second segment is T, and the wall thickness of the first segment is C, satisfying: C≤0.65T.

6. The battery cell according to any one of claims 1-5, characterized in that, The orthographic projection of the third segment along the distribution direction of the cover plate assembly and the electrode assembly does not coincide with the second projection.

7. The battery cell according to claim 6, characterized in that, The main body of the third segment bends relative to the second segment toward the electrode assembly.

8. The battery cell according to claim 6, characterized in that, The third paragraph includes: The main body is connected to the second paragraph; A connecting structure is provided on the main body portion, and is equivalent to the main body portion protruding towards the cover plate assembly, and is connected to the pole post.

9. The battery cell according to any one of claims 1-5, characterized in that, The second segment is connected to the first segment on both sides that are spaced apart relative to each other along the width direction of the battery cell. The two first segments of the adapter are respectively connected to tabs that are spaced apart relative to each other along the width direction of the battery cell and have the same polarity.

10. An adapter plate, characterized in that, The adapter piece, which is applied to a battery cell, includes a first segment, a second segment, and a third segment connected in sequence. The wall thickness of the first segment is less than the wall thickness of the second segment and the third segment. The first segment has a connecting surface for connecting with the tab of the battery cell, and the third segment has a connecting structure for connecting with the terminal post of the battery cell.

11. A battery device, characterized in that, include: Multiple battery cells according to any one of claims 1-9.

12. An energy storage device, characterized in that, include: A plurality of battery cells as described in any one of claims 1-9 or a plurality of battery devices as described in claim 11, wherein the battery cells or the battery devices are used to store or provide electrical energy.

13. An electrical appliance, characterized in that, include: The battery cell as described in any one of claims 1-9, the battery device as described in claim 11, or the energy storage device as described in claim 12, wherein the battery cell or the battery device is used to store or provide electrical energy.

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