Battery cell, battery device, and electric device

Abstract

The utility model provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises a shell, an electrode assembly, an electrode terminal and an adapter plate, the shell has an accommodating cavity. The electrode assembly is accommodated in the accommodating cavity and comprises a main body part and a tab which are connected with each other; the electrode terminal is arranged on the shell and located on one side of the electrode assembly in the first direction. And the adapter plate is accommodated in the accommodating cavity and is connected with the tab and the electrode terminal respectively. Wherein in the first direction, the adapter piece is partially arranged between the tab and the main body part. The embodiment of the utility model is beneficial to improving the energy density of the battery monomer.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery device, and an electrical device. Background Art

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, ion battery cells, and secondary alkaline zinc-manganese battery cells.

[0003] In the development of battery technology, how to improve the energy density of battery cells is a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell, a battery device and an electrical device, which are conducive to improving the energy density of the battery cell.

[0005] In the first aspect, the present application provides a battery cell, comprising: a shell having a accommodating cavity; an electrode assembly accommodated in the accommodating cavity, the electrode assembly comprising a main body and a tab connected to each other; an electrode terminal, arranged in the shell and located on one side of the electrode assembly along a first direction; a adapter plate, accommodated in the accommodating cavity, the adapter plate being respectively connected to the tab and the electrode terminal; wherein, along the first direction, the adapter plate is partially arranged between the tab and the main body.

[0006] In some embodiments of the first aspect, the battery cell includes a shell, an electrode assembly, an electrode terminal and a transfer plate. The electrode assembly and the electrode terminal are electrically connected through the transfer plate. By arranging part of the transfer plate between the pole ear and the main body along the first direction, the space occupied by the transfer plate after the connection with the pole ear can be reduced, so that the space for accommodating the main body in the accommodating cavity is increased, so that the size of the main body along the first direction can be designed to be larger, which is beneficial to improving the energy density of the battery cell.

[0007] In some embodiments, the housing includes a shell and an end cap assembly, wherein the shell has an opening along a first direction, and the end cap assembly includes a cover plate that covers the opening and forms a receiving cavity with the shell, and the electrode terminal is disposed on the cover plate. This arrangement facilitates processing and assembly.

[0008] In some embodiments, the tab is bent and connected to a surface of the adapter plate that faces away from the main body along the first direction. This arrangement facilitates the connection between the tab and the adapter plate.

[0009] In some embodiments, the tab includes a first base and a second base arranged in an intersecting manner, the first base being connected between the main body and the second base. The first base, the second base, and the main body together form a receiving space, and the adapter portion is located in the receiving space and connected to the second base. This arrangement facilitates the tab's molding and helps reduce the space occupied by the tab.

[0010] In some embodiments, the main body, the adapter plate, and the second base are stacked in sequence in the first direction, with the first base and the sidewall of the adapter plate being in contact with each other. This arrangement makes the adapter plate and the tab design more compact, which helps to reduce the space occupied by the two after they are connected.

[0011] In some embodiments, the adapter plate has a notch, and the tab is inserted into the notch and bent so that the adapter plate is partially located between the tab and the main body along the first direction. This arrangement facilitates assembly and helps reduce costs.

[0012] In some embodiments, the adapter includes a terminal connection portion and a tab connection portion, the tab connection portion being disposed on at least one side of the notch along the second direction, and the terminal connection portion being disposed on one side of the notch along the third direction, the tab connection portion being connected to the tab, and the terminal connection portion being connected to the electrode terminal, wherein the third direction intersects the first direction and the second direction. This arrangement provides a reasonable layout and facilitates connection and assembly of the adapter with the tab and the electrode terminal.

[0013] In some embodiments, the number of tab connections is set to two or more, and the two or more tab connections are arranged side by side along the second direction, with a gap formed between two adjacent tab connections. This arrangement is reasonable and easy to assemble.

[0014] In some embodiments, the number of the notches is set to two or more, and the two or more notches are spaced apart along the second direction. This arrangement enables one adapter to be connected to multiple tabs, which helps improve the manufacturing efficiency of the adapter.

[0015] In some embodiments, the tab connection portion and the terminal connection portion are an integrated structure, which helps improve manufacturing efficiency.

[0016] By arranging in this manner, the thickness of the tab connection portion is the same as the thickness of the terminal connection portion along the first direction, which facilitates processing and manufacturing.

[0017] In some embodiments, a surface of the tab connection portion along a first direction is coplanar with a surface of the terminal connection portion along the first direction, and another surface of the tab connection portion along the first direction is coplanar with another surface of the terminal connection portion along the first direction. This arrangement facilitates processing and manufacturing.

[0018] In some embodiments, the number of electrode assemblies is set to n, where n is an even number, and the number of notches is n / 2. The tabs of two adjacent electrode assemblies are inserted into the same notch, and the tabs of two adjacent electrode assemblies are symmetrically arranged close to each other. This arrangement helps increase the connection area between the adapter and the tab, thereby improving the current flow capacity between the two.

[0019] In some embodiments, the tabs of the same electrode assembly are arranged in pairs, and the notches are arranged toward the paired tabs in the arrangement direction of the paired tabs. This arrangement facilitates the assembly of the adapter and the tabs.

[0020] In a second aspect, the present application provides a battery device comprising a plurality of battery cells provided according to any embodiment of the first aspect.

[0021] In a third aspect, the present application provides an electrical device comprising a plurality of battery cells provided according to any embodiment of the first aspect, or a battery device provided according to any embodiment of the second aspect, wherein the battery cells or the battery device are used to store or provide electrical energy.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0025] Figure 2 A schematic diagram of an exploded structure of a battery provided in some embodiments of the present application;

[0026] Figure 3 A schematic structural diagram of a battery cell assembly provided in some embodiments of the present application;

[0027] Figure 4 A schematic diagram of a three-dimensional structure of a battery cell provided in some embodiments of the present application;

[0028] Figure 5 A schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application;

[0029] Figure 6 A schematic diagram of a partial structure of a battery cell provided in some embodiments of the present application;

[0030] Figure 7 A schematic structural diagram of an adapter plate in a battery cell provided in some embodiments of the present application;

[0031] Figure 8 A schematic structural diagram of an adapter plate in a battery cell provided in other embodiments of the present application;

[0032] Figure 9 A schematic diagram of the partial structure of a battery cell provided in some other embodiments of the present application.

[0033] The accompanying drawings in the specific implementation manner are as follows:

[0034] 1000 - vehicle; 1 - battery device; 2 - controller; 3 - motor; 1a - battery cell assembly; 100 - battery cell; 200 - housing; 210 - first housing portion; 220 - second housing portion;

[0035] 10-housing; 10a-accommodation chamber; 11-shell; 121-cover plate; 122-pressure relief mechanism;

[0036] 20 - electrode assembly; 21 - main body; 22 - tab; 221 - first substrate; 222 - second substrate;

[0037] 30-electrode terminal;

[0038] 40- adapter; 40a- notch; 41- terminal connection portion; 42- tab connection portion;

[0039] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0041] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0043] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0044] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0047] The development of battery technology must take into account multiple design factors at the same time, such as battery life, energy density, discharge capacity, charge and discharge rate and other performance parameters.

[0048] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0049] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0050] In the battery cell in the related art, the electrode tab of the electrode assembly is usually connected to the side of the adapter plate facing away from the main body of the electrode assembly after bending, that is, the tab after connection is located between the adapter plate and the main body. The tab and the adapter plate after connection will occupy a larger space inside the battery cell, which is not conducive to improving the energy density of the battery cell.

[0051] Based on the above technical problems, an embodiment of the present application provides a battery cell, comprising a housing, an electrode assembly, an electrode terminal, and a transition piece. The housing has a receiving cavity. The electrode assembly is received in the receiving cavity, and the electrode assembly includes a main body portion and a tab connected to each other. The electrode terminal is disposed in the housing and is located on one side of the electrode assembly along a first direction. The transition piece is received in the receiving cavity and is connected to the tab and the electrode terminal, respectively. In the first direction, the transition piece is partially disposed between the tab and the main body portion.

[0052] By arranging part of the adapter plate between the tab and the main body along the first direction, the space occupied by the adapter plate after being connected to the tab is reduced, which is beneficial to improving space utilization and thus helping to improve the energy density of the battery cell.

[0053] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0054] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery cells. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0055] For example, Figure 1 As shown, Figure 1This is a structural schematic diagram of a vehicle 1000 according to one embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 3, a controller 2 and a battery device 1 may be provided inside the vehicle 1000. The controller 2 is used to control the battery device 1 to power the motor 3. For example, a battery device 1 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 1 may be used to power the vehicle 1000. For example, the battery device 1 may be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000, for example, for the working power requirements of the vehicle 1000 during startup, navigation and operation. In another embodiment of the present application, the battery device 1 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] See also Figure 2 and Figure 3 The battery apparatus 1 mentioned in the embodiments of the present application may include one or more battery cell assemblies 1a for providing voltage and capacity. The battery cell assembly 1a may include multiple battery cells 100, which are connected in series, parallel, or in series-parallel connection via a busbar.

[0057] In some embodiments, a battery cell assembly 1 a is generally formed by arranging a plurality of battery cells 100 .

[0058] As an example, the battery cell assembly 1a may be a battery module, which is formed by arranging and fixing a plurality of battery cells 100 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 100 with a cable tie.

[0059] like Figure 2 As shown, in some embodiments, the battery device 1 may be a battery pack, which includes a box 200 and one or more battery cell assemblies 1 a , wherein the battery cell assembly 1 a is accommodated in the box 200 .

[0060] As an example, the battery cell assembly 1 a may be a battery module, and the battery cell assembly 1 a may be accommodated in the box body 200 by fixing the battery module in the box body 200 .

[0061] As an example, the battery cell assembly 1 a may also be housed in the box body 200 by directly fixing the plurality of battery cells 100 to the box body 200 .

[0062] As an example, the housing 200 may include a first housing 210 and a second housing 220. The first housing 210 and the second housing 220 engage to form an enclosed space within the housing 200 for accommodating the battery cell assembly 1a. Enclosed herein means covered or closed, and may be either sealed or unsealed. The first housing 210 may be a top cover or a bottom plate.

[0063] As an example, the box body 200 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 200 to accommodate the battery cell assembly 1a.

[0064] In some embodiments, the box 200 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box 200 may become at least a portion of the floor of the vehicle 1000, or a portion of the box 200 may become at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0065] In the present application, the battery cell 100 may include a lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., which is not limited in the embodiments of the present application.

[0066] As an example, the battery cell 100 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 polygonal battery, and a polygonal battery such as a hexagonal battery. There is no special limitation in this application.

[0067] See also Figures 3 to 6 According to an embodiment of the present application, a battery cell 100 is provided, including a housing 10 , an electrode assembly 20 , an electrode terminal 30 , and a switching piece 40 .

[0068] The housing 10 is a component used to create an internal environment for the battery cell 100. This internal environment can accommodate the electrode assembly 20, the adapter 40, the electrolyte, and other components. Optionally, the housing 10 can be made of, but is not limited to, metal or non-metallic materials. For example, metal materials can include copper, aluminum, or stainless steel; non-metallic materials can include polyethylene, polypropylene, or polyvinyl chloride.

[0069] For example, the housing 10 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0070] In some embodiments, the housing 10 can be either a sealed or unsealed structure. For example, in an unsealed structure, the housing 10 protects the electrode assembly 20 and includes a sealed bag between the housing 10 and the electrode assembly 20. The sealed bag is used to encapsulate the electrode assembly 20 and the electrolyte. Specifically, the sealed bag can be a bag-shaped insulating member or an aluminum-plastic film. In a sealed structure, the housing 10 encapsulates the electrode assembly 20, the electrolyte, and other components.

[0071] The shape of the housing 10 can be determined according to the specific shape of the electrode assembly 20. For example, if the electrode assembly 20 is a rectangular parallelepiped structure, a rectangular housing 10 can be selected; if the electrode assembly 20 is a cylindrical structure, a cylindrical housing 10 can be selected.

[0072] The electrode assembly 20 is a component where electrochemical reactions occur in the battery cell 100 , and the housing 10 may contain one or more electrode assemblies 20 .

[0073] In some embodiments, the shape of the electrode assembly 20 can be cylindrical, flat, or polygonal.

[0074] The electrode assembly 20 may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0075] The electrode assembly 20 includes a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of the battery cell 100, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0076] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector. In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector.

[0077] The electrode terminal 30 may be used to be electrically connected to the electrode assembly 20 for outputting or inputting electrical energy of the battery cell 100 .

[0078] In some embodiments, the battery cell 100 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, and the electrolyte can be selected according to needs.

[0079] Please also refer to Figures 4 to 6According to an embodiment of the present application, a battery cell 100 is provided, comprising a housing 10, an electrode assembly 20, an electrode terminal 30, and a transition piece 40. The housing 10 has a housing cavity 10a. The electrode assembly 20 is accommodated in the housing cavity 10a, and the electrode assembly 20 comprises a main body 21 and a tab 22 connected to each other. The electrode terminal 30 is disposed in the housing 10 and is located on one side of the electrode assembly 20 along the first direction X. The transition piece 40 is accommodated in the housing cavity 10a, and the transition piece 40 is respectively connected to the tab 22 and the electrode terminal 30. Part of the transition piece 40 is disposed between the tab 22 and the main body 21 along the first direction X.

[0080] In the embodiment of the present application, the first direction X can be represented as the height direction of the electrode assembly 20 , the second direction Y can be represented as the width direction of the electrode assembly 20 , and the third direction Z can be represented as the length direction of the electrode assembly 20 .

[0081] The accommodating cavity 10a is used to accommodate the electrode assembly 20 and the adapter 40 so that the housing 10 can protect its internal components.

[0082] The electrode assembly 20 includes a main body 21 and tabs 22 . The tabs 22 can conduct current from the main body 21 . The tabs 22 may include a positive tab and a negative tab.

[0083] Exemplarily, a tab 22 is provided on one side of the main body 21 along the first direction X.

[0084] At least one electrode terminal 30 is provided on the housing 10 , and the electrode terminal 30 is used to electrically connect to the electrode assembly 20 to output or input electrical energy from the battery cell 100 . The electrode terminal 30 can be electrically connected to the electrode assembly 20 by connecting to the tab 22 .

[0085] The adapter plate 40 is used to achieve electrical connection between the electrode terminal 30 and the tab 22 . Exemplarily, the material of the adapter plate 40 is not limited, and may be copper or aluminum, for example.

[0086] Some embodiments of the present application provide a battery cell 100, which includes a housing 10, an electrode assembly 20, an electrode terminal 30 and a transition piece 40. The electrode assembly 20 and the electrode terminal 30 can be electrically connected through the transition piece 40. By arranging at least a portion of the transition piece 40 between the pole tab 22 and the main body 21 along the first direction X, the space occupied by the transition piece 40 after being connected to the pole tab 22 can be reduced, so that the space for accommodating the main body 21 in the accommodating cavity 10a is increased, so that the size of the main body 21 along the first direction X can be designed to be larger, which is beneficial to improving the energy density of the battery cell 100.

[0087] Along the first direction X, the adapter plate 40 is partially arranged between the pole tab 22 and the main body 21. It can be understood that a portion of the adapter plate 40 can be arranged between the pole tab 22 and the main body 21 along the first direction X to be connected to the pole tab 22, and another portion of the adapter plate 40 can be connected to the electrode terminal 30.

[0088] Some embodiments of the present application provide a battery cell 100, which includes a housing 10, an electrode assembly 20, an electrode terminal 30 and a transition piece 40. The electrode assembly 20 and the electrode terminal 30 are electrically connected through the transition piece 40. By arranging a portion of the transition piece 40 between the tab 22 and the main body 21 along the first direction X, the transition piece 40, the tab 22 and the main body 21 can be arranged more compactly, and the space occupied by the transition piece 40 after the connection with the tab 22 can be reduced, so that the space in the accommodating cavity 10a for accommodating the main body 21 is increased, so that the size of the main body 21 along the first direction X can be designed to be larger, which is beneficial to improving the energy density of the battery cell 100.

[0089] That is to say, through the above-mentioned arrangement, under the condition that the length of the battery cell 100 along the first direction X remains unchanged, the length of the main body 21 along the first direction X can be increased, which is beneficial to improving the energy density of the battery cell 100; or, under the condition that the length of the main body 21 along the first direction X remains unchanged, the length of the entire battery cell 100 along the first direction X can be reduced, which is beneficial to improving the space utilization of the battery cell 100.

[0090] The number of electrode assemblies 20 can be one, two, or more.

[0091] See also Figure 4 and Figure 5 In some optional embodiments, the housing 10 includes a shell 11 and an end cover assembly, the shell 11 has an opening along the first direction X, the end cover assembly includes a cover plate 121, the cover plate 121 covers the opening and encloses the shell 11 to form a accommodating cavity 10a, and the electrode terminal 30 is arranged on the cover plate 121.

[0092] The shell 11 can be set as a box-shaped structure with an opening on one side along the first direction X, and the cover 121 can be set as one and cover this opening to enclose the shell 11 to form a accommodating cavity 10a; or, the shell 11 can also be set as a cylindrical structure with openings on both sides along the first direction X, and the two cover plates 121 each cover one opening to enclose the shell 11 to form a accommodating cavity 10a.

[0093] The housing 11 is a component used to cooperate with the end cap assembly to form an internal environment of the battery cell 100, and is used to accommodate the electrode assembly 20, electrolyte, adapter 40 and other components.

[0094] The end cap assembly includes a cover plate 121, which is a component that covers the opening of the housing 11 to isolate the internal environment of the battery cell 100 from the external environment. The shape of the cover plate 121 can be circular, rectangular, oval or other shapes.

[0095] The end cap assembly may further include a pressure relief mechanism 122 for releasing internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold. In the third direction Z, an electrode terminal 30 may be spaced apart on both sides of the pressure relief mechanism 122 .

[0096] The battery cell 100 provided in some embodiments of the present application, by arranging the electrode terminal 30 on the cover plate 121, facilitates the formation or assembly of the electrode terminal 30 on the cover plate 121, and also facilitates the connection between the adapter plate 40 and the electrode terminal 30. It can reasonably arrange the positions of the electrode terminal 30, the adapter plate 40 and the tab 22, and facilitates the assembly of the three.

[0097] like Figure 6 As shown, in some optional embodiments, the tab 22 is bent and connected to a side surface of the adapter plate 40 along the first direction X facing away from the main body 21 .

[0098] The tab 22 is bent to ensure that a portion of the adapter plate 40 along the first direction X can be effectively disposed between the tab 22 and the main body 21 .

[0099] It can be understood that the area of the side surface of the adapter plate 40 along the first direction X is larger than the area of the side surface thereof along the second direction Y. Therefore, by setting it in the above manner, it is convenient to connect the tab 22 with the adapter plate 40, which helps to reduce the difficulty of assembly. At the same time, it also helps to increase the connection area between the two, thereby facilitating the provision of the current flow capacity between the two, thereby helping to increase the energy density of the battery cell 100.

[0100] In addition, the tab 22 is connected to the side surface of the adapter plate 40 facing away from the main body 21 along the first direction X, so that the tab 22 and the adapter plate 40 can be arranged more compactly in the first direction X to reduce the space occupied by them in the first direction X, thereby enabling the main body 21 to have more setting space in the first direction X, which is conducive to improving the energy density of the battery cell 100.

[0101] like Figure 7 As shown, in some embodiments, the adapter plate 40 is provided with a notch 40 a , and the tab 22 can pass through the notch 40 a and be bent to connect with the adapter plate 40 located around the notch 40 a .

[0102] In other embodiments, the tab 22 can pass through the peripheral side of the adapter plate 40 and be bent to be connected to the adapter plate 40 .

[0103] Please continue reading Figure 6 In some optional embodiments, the tab 22 includes a first base 221 and a second base 222 that are intersectingly arranged, the first base 221 is connected between the main body 21 and the second base 222, the first base 221, the second base 222 and the main body 21 enclose a receiving space, and the adapter 40 is partially located in the receiving space and connected to the second base 222.

[0104] The tab 22 includes a first base 221 and a second base 222 that are intersectingly arranged. It can be understood that the extension directions of the first base 221 and the second base 222 intersect with each other.

[0105] In some optional embodiments, the first base 221 may be extended along the first direction X, and the second base 222 may be extended along the second direction Y.

[0106] The above arrangement facilitates the manufacture of the tab 22 , facilitates the shaping of the tab 22 , and helps reduce the space occupied by the tab 22 along the first direction X after being bent.

[0107] In some embodiments, the length of the first base 221 in the first direction X is greater than or equal to the length of the adapter plate 40 in the first direction X, so as to ensure that the adapter plate 40 can be partially located in the accommodating space.

[0108] Exemplarily, the length dimension of the first substrate 221 in the first direction X is equal to the length dimension of the adapter plate 40 in the first direction X, so that the adapter plate 40, the tab 22 and the main body 21 are arranged more compactly in the first direction X, which is conducive to improving space utilization and thus helping to improve the energy density of the battery cell 100.

[0109] In some optional embodiments, the main body 21 , the adapter plate 40 and the second base 222 are stacked in sequence in the first direction X, and the first base 221 is attached to the side wall of the adapter plate 40 .

[0110] The main body 21, the adapter plate 40 and the second base 222 are stacked in sequence in the first direction X, which can be understood as the main body 21, the adapter plate 40 and the second base 222 are abutted in sequence in the first direction X, that is, there is no gap between the main body 21 and the adapter plate 40 in the first direction X, and there is no gap between the adapter plate 40 and the second base 222 in the first direction X, so that the three are arranged more compactly in the first direction X.

[0111] The first base 221 and the side wall of the adapter plate 40 are fitted together, so that there is no gap between the first base 221 and the adapter plate 40 in the second direction Y, so that the two are more compactly arranged in the second direction Y.

[0112] The battery cell 100 provided in some embodiments of the present application is arranged in the above manner, so that the adapter plate 40, the main body 21 and the tab 22 are arranged more compactly, reducing the occupied area of the tab 22 and the adapter plate 40 after the two are connected, so that the accommodating cavity 10a has more space to accommodate the main body 21, which is beneficial to improving the energy density of the battery cell 100.

[0113] See also Figure 6 and Figure 7 In some optional embodiments, the adapter plate 40 has a notch 40 a, and the tab 22 is passed through the notch 40 a and bent so that the adapter plate 40 is partially located between the tab 22 and the main body 21 along the first direction X.

[0114] The notch 40 a can be understood as the adapter plate 40 having a through hole arranged along the first direction X, and a side surface of the adapter plate 40 along a certain direction having an opening communicating with the through hole.

[0115] The tab 22 can pass through the notch 40 a and be bent toward the adapter plate 40 , so that in the first direction X, a portion of the adapter plate 40 is located between the bent portion of the tab 22 and the main body 21 .

[0116] Illustratively, the tab 22 is bent to form a first base 221 and a second base 222 intersecting each other. The first base 221 passes through the notch 40 a. In the first direction X, part of the adapter 40 is located between the second base 222 and the main body 21 .

[0117] The battery cell 100 provided in some embodiments of the present application is configured in the above manner, which is convenient for assembly and can reduce the material used for the adapter plate 40 , thereby helping to reduce the cost of using the adapter plate 40 and thus helping to reduce the cost of the battery cell 100 .

[0118] In some embodiments, the opening direction of the notch 40a is set towards the second direction Y; in other embodiments, the opening direction of the notch 40a is set towards the third direction Z.

[0119] Optionally, the radial dimension of the notch 40 a may be greater than or equal to the thickness of the tab 22 , so that the tab 22 can pass through the notch 40 a .

[0120] Please continue reading Figure 7In some optional embodiments, the adapter 40 includes a terminal connecting portion 41 and a tab connecting portion 42, the tab connecting portion 42 is arranged on at least one side of the notch 40a along the second direction Y, and the terminal connecting portion 41 is arranged on one side of the notch 40a along the third direction Z, the tab connecting portion 42 is connected to the tab 22, and the terminal connecting portion 41 is connected to the electrode terminal 30, and the third direction Z intersects with the first direction X and the second direction Y.

[0121] Along the first direction X, the tab connecting portion 42 is disposed between the tab 22 and the main body 21 .

[0122] The terminal connection portion 41 is a structure in the adapter plate 40 for connecting to the electrode terminal 30 , and the tab connection portion 42 is a structure in the adapter plate 40 for connecting to the tab 22 .

[0123] The battery cells 100 provided in some embodiments of the present application are configured in the above manner, and have a reasonable layout, which facilitates the processing and production of the adapter sheet 40 and the assembly of the battery cells 100 .

[0124] Optionally, the connection between the tab connecting portion 42 and the tab 22 may be achieved by ultrasonic welding, and the connection between the terminal connecting portion 41 and the electrode terminal 30 may be achieved by laser welding.

[0125] In some embodiments, the tab connection portion 42 is arranged on one side of the notch 40a along the second direction Y, and the tab 22 can pass through the notch 40a and be bent to connect with the tab connection portion 42. The tab 22 can also pass through the side of the tab connection portion 42 along the second direction Y away from the notch 40a and be bent to connect with the tab connection portion 42.

[0126] For example, one adapter plate 40 is used to connect two tabs 22, and the tab connecting portion 42 is disposed on one side of the notch 40a along the second direction Y. One tab 22 can pass through the notch 40a and be bent to connect with the tab connecting portion 42, and the other tab can pass through the side of the tab connecting portion 42 facing away from the notch 40a along the second direction Y and be bent to connect with the tab connecting portion 42. The two tabs 22 are bent toward each other.

[0127] In some embodiments, the tab connection portions 42 are disposed on both sides of the notch 40 a along the second direction Y.

[0128] For example, an adapter plate 40 is used to connect two tabs 22, and the tab connecting portion 42 is arranged on both sides of the notch 40a along the second direction Y. The two tabs 22 are passed through the notch 40a and bent back to back to each other, one of the tabs 22 is connected to the tab connecting portion 42 located on one side of the notch 40a along the second direction Y, and the other tab 22 is connected to the tab connecting portion 42 located on the other side of the notch 40a along the second direction Y.

[0129] like Figure 7 As shown, in some optional embodiments, the number of the tab connection parts 42 is set to two or more, and the two or more tab connection parts 42 are arranged side by side along the second direction Y, and a gap 40 a is formed between two adjacent tab connection parts 42.

[0130] By arranging in this manner, one tab 22 can be connected to one tab connection portion 42 to avoid interference problems, making the layout of the adapter 40 reasonable and facilitating its connection with the tab 22 .

[0131] See also Figure 8 and Figure 9 In some optional embodiments, the number of the notches 40a is set to two or more, and the two or more notches 40a are spaced apart along the second direction Y.

[0132] One adapter plate 40 may be provided with two or more notches 40 a to facilitate assembly with different numbers of electrode assemblies 20 , thereby improving the manufacturing efficiency of the adapter plate 40 and reducing the cost of the adapter plate 40 .

[0133] Optionally, the number of the notches 40a of the adapter plate 40 can be set to two or three, or of course, more.

[0134] For example, the adapter plate 40 has two notches 40a spaced apart along the second direction Y, and each notch 40a is provided with a pole ear connection portion 42 on both sides along the second direction Y. The adapter plate 40 of this structure can be used to assemble with two electrode assemblies 20 arranged along the second direction Y, and can also be used to assemble with four electrode assemblies 20 arranged along the second direction Y.

[0135] In some embodiments, the adapter plate 40 has two notches 40a spaced apart along the second direction Y. The adapter plate 40 of this structure can be used to assemble with two electrode assemblies 20 arranged along the second direction Y, wherein the pole ears 22 on the two electrode assemblies 20 are arranged back to back to each other, that is, the pole ear 22 on one of the electrode assemblies 20 is arranged on the side of the main body 21 along the second direction Y facing away from the other electrode assembly 20. By arranging in this manner, one pole ear 22 can be arranged corresponding to one notch 40a, that is, one pole ear 22 extends from one notch 40a and is bent to be connected to the pole ear 22 adapter located on either side of the notch 40a along the second direction Y.

[0136] In other embodiments, the adapter plate 40 has two notches 40a spaced apart along the second direction Y. The adapter plate 40 of this structure can be used to assemble with four electrode assemblies 20 arranged along the second direction Y, wherein the pole ears 22 of each two electrode assemblies 20 are arranged toward each other, that is, the pole ear 22 on one of the electrode assemblies 20 is arranged on the side of the main body 21 along the second direction Y toward the other electrode assembly 20. By arranging in this manner, the two pole ears 22 can be arranged corresponding to one notch 40a, that is, the two pole ears 22 extend from one notch 40a and are bent back to back to each other, so as to be respectively connected to the pole ear 22 adapter portion located on the side of the notch 40a along the second direction Y.

[0137] In some optional embodiments, the tab connection portion 42 and the terminal connection portion 41 are an integrated structure.

[0138] For example, a thin plate structure is prepared by punching, bending, cutting and other processes to form an integrated tab connection portion 42 and a terminal connection portion 41 .

[0139] This arrangement is beneficial to improving the processing efficiency of the adapter plate 40 and ensuring the connection strength between the tab connection portion 42 and the terminal connection portion 41, thereby ensuring the structural strength of the adapter plate 40 and further ensuring the reliability of the battery cell 100.

[0140] Alternatively, the tab connection portion 42 and the terminal connection portion 41 may be provided separately.

[0141] For example, the tab connection portion 42 and the terminal connection portion 41 are independent plates, and multiple plates are spliced together to form the adapter 40. The tab connection portion 42 and the terminal connection portion 41 can be connected by welding.

[0142] In some optional embodiments, along the first direction X, the thickness of the tab connecting portion 42 is the same as the thickness of the terminal connecting portion 41 .

[0143] The battery cells 100 provided in some embodiments of the present application are configured in the above manner, which facilitates the processing and manufacturing of the adapter plate 40, thereby reducing processing difficulty and improving manufacturing efficiency.

[0144] In some embodiments, the thickness of the tab connection portion 42 is the same as the thickness of the terminal connection portion 41 , and there is a height difference between the tab connection portion 42 and the terminal connection portion 41 in the first direction X.

[0145] That is to say, the tab connection portion 42 is located on the side of the terminal connection portion 41 that is away from the electrode assembly 20 along the first direction X, or the terminal connection portion 41 is located on the side of the tab connection portion 42 that is away from the electrode assembly 20 along the first direction X. By setting it in this way, the positions of the tab connection portion 42 and the terminal connection portion 41 of the adapter 40 can be designed according to the positions of the tab 22 and the electrode terminal 30 in the first direction X, so as to facilitate the connection between the tab connection portion 42 and the tab 22 and the terminal connection portion 41 and the electrode terminal 30, and at the same time, it is also beneficial to improve the connection tightness.

[0146] In some embodiments, the thickness of the tab connection portion 42 is the same as the thickness of the terminal connection portion 41 , and there is no height difference between the tab connection portion 42 and the terminal connection portion 41 in the first direction X.

[0147] See also Figure 5 and Figure 7 In some optional embodiments, one side surface of the tab connection portion 42 along the first direction X is coplanar with one side surface of the terminal connection portion 41 along the first direction X, and the other side surface of the tab connection portion 42 along the first direction X is coplanar with the other side surface of the terminal connection portion 41 along the first direction X.

[0148] That is, in the first direction X, the top surface of the tab connection portion 42 is coplanar with the top surface of the terminal connection portion 41 , and the bottom surface of the tab connection portion 42 is coplanar with the bottom surface of the terminal connection portion 41 .

[0149] The coplanar arrangement can be understood as that the top surface of the tab connection portion 42 and the top surface of the terminal connection portion 41 are located in the same extension plane, and the bottom surface of the tab connection portion 42 and the bottom surface of the terminal connection portion 41 have no height difference in the first direction X.

[0150] The battery cells 100 provided in some embodiments of the present application are configured in the above manner, which facilitates the processing and manufacturing of the adapter plate 40, thereby reducing processing difficulty and improving manufacturing efficiency.

[0151] See also Figures 5 to 9 In some optional embodiments, the number of electrode assemblies 20 is set to n, n is an even number, the number of notches 40a is n / 2, the pole ears 22 of every two adjacent electrode assemblies 20 are passed through the same notch 40a, and the pole ears 22 of every two adjacent electrode assemblies 20 are symmetrical and close to each other.

[0152] In an embodiment of the present application, the number of electrode assemblies 20 is set to an even number, and the number of gaps 40a is set to half the number of electrode assemblies 20. By setting it in this way, the tabs 22 of every two adjacent electrode assemblies 20 can pass through the same gap 40a, which is convenient for assembly.

[0153] The fact that the tabs 22 of every two adjacent electrode assemblies 20 are passed through the same notch 40a can be understood as follows: n electrode assemblies 20 are arranged along the second direction Y, and the first electrode assembly 20 and the second electrode assembly 20 located at the outermost sides along the second direction Y among the n electrode assemblies 20 are represented as two adjacent electrode assemblies 20, the third electrode assembly 20 and the fourth electrode assembly 20 are represented as two adjacent electrode assemblies 20, and the n-1th electrode assembly 20 and the nth electrode assembly 20 are represented as two adjacent electrode assemblies 20.

[0154] The tabs 22 of each two adjacent electrode assemblies 20 are symmetrically and close to each other, which can be understood as follows: the tab 22 of one electrode assembly 20 is arranged on one side of the main body 21 along the second direction Y toward the other electrode assembly 20, and the two tabs 22 are bent back to back toward each other, so that the two tabs 22 pass through the same notch 40a and are respectively connected to the tab connecting portion 42.

[0155] In some embodiments, the adapter plate 40 is configured as a plate-shaped structure extending along the second direction Y.

[0156] See also Figure 5 、 Figure 7 and Figure 9 In some optional embodiments, the tabs 22 of the same electrode assembly 20 are arranged in pairs, and in the arrangement direction of the paired tabs 22, the notches 40a are arranged toward the paired tabs 22.

[0157] In the embodiment of the present application, the arrangement direction of the paired tabs 22 is the third direction Z.

[0158] The two pole tabs 22 of the same electrode assembly 20 are arranged along the third direction Z, and the notches 40a of the adapter plate 40 are set along the third direction Z toward the two pole tabs 22. It can be understood that the two pole tabs 22 included in the same electrode assembly 20 need to be connected to a adapter plate 40 respectively to be electrically connected to the electrode terminal 30, that is, the two adapter plates 40 are arranged along the third direction Z, and the notches 40a of the two adapter plates 40 are set toward each other, and the paired pole tabs 22 are located between the two adapter plates 40.

[0159] The battery cell 100 provided in some embodiments of the present application is configured in the above manner to facilitate the assembly of the adapter plate 40 and the pole tab 22, so as to avoid interference with the other pole tab 22 when the adapter plate 40 is connected to one of the pole tabs 22, thereby improving assembly efficiency and ensuring the reliability of the battery cell 100.

[0160] In some embodiments, the electrode terminal 30 falls into the positive projection of the main body 21 in the first direction X, and is located on the side of one of the pole ears 22 facing away from the other pole ear 22, so that the electrode terminal 30 is connected to the terminal connecting portion 41 located on the side of the notch 40a along the third direction Z.

[0161] Exemplarily, the electrode terminals 30 are arranged in pairs, and the paired electrode terminals 30 are arranged along the second direction Y. In a plane perpendicular to the first direction X, the orthographic projections of the two tabs 22 are located between the orthographic projections of the two electrode terminals 30 along the second direction Y.

[0162] The battery cells 100 provided in some embodiments of the present application are configured in the above manner, and have a reasonable layout, which facilitates the assembly of the adapter 40 with the tab 22 and the electrode terminal 30 .

[0163] According to some embodiments of the present application, the present application further provides a battery device, comprising a plurality of battery cells 100 provided by any of the above embodiments.

[0164] According to some embodiments of the present application, the present application also provides an electrical device, including multiple battery cells 100 provided by any of the above embodiments or battery devices provided by any of the above embodiments, and the battery cells 100 or battery devices are used to store or provide electrical energy.

[0165] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 9 , an embodiment of the present application provides a battery cell 100 , including a housing 10 , an electrode assembly 20 , an electrode terminal 30 and a transition piece 40 .

[0166] The housing 10 includes a shell 11 and an end cover assembly. The shell 11 has an opening along the first direction X. The end cover assembly includes a cover plate 121. The cover plate 121 covers the opening and encloses the shell 11 to form an accommodating cavity 10a.

[0167] The electrode assembly 20 is housed in the housing chamber 10a and includes a main body 21 and a tab 22 connected to each other. The tab 22 includes a first base 221 and a second base 222 intersecting each other. The first base 221 is connected between the main body 21 and the second base 222. The first base 221, the second base 222, and the main body 21 together form a housing space. The electrode terminal 30 is disposed on the cover plate 121 and is located on one side of the electrode assembly 20 along the first direction X.

[0168] The adapter plate 40 is accommodated in the accommodating cavity 10a and is connected to the tab 22 and the electrode terminal 30 respectively. The adapter plate 40 has a notch 40a, and the tab 22 is passed through the notch 40a and bent. The number of electrode assemblies 20 is set to n, n is an even number, and the number of notches 40a is n / 2. The tabs 22 of each two adjacent electrode assemblies 20 are passed through the same notch 40a, and the tabs 22 of each two adjacent electrode assemblies 20 are symmetrical and close to each other. The tabs 22 of the same electrode assembly 20 are arranged in pairs, and in the arrangement direction of the paired tabs 22, the notches 40a are arranged towards the paired tabs 22.

[0169] The adapter plate 40 includes a terminal connection part 41 and a tab connection part 42 which are an integrated structure. The number of the tab connection parts 42 is set to two or more. Two or more tab connection parts 42 are arranged side by side along the second direction Y. A gap 40a is formed between two adjacent tab connection parts 42. The terminal connection part 41 is arranged on one side of the gap 40a along the third direction Z. The tab connection part 42 is connected to the tab 22. The terminal connection part 41 is connected to the electrode terminal 30. The third direction Z intersects with the first direction X and the second direction Y.

[0170] The tab 22 is connected to a surface of the adapter plate 40 facing away from the main body 21 along the first direction X. Along the first direction X, the adapter plate 40 is at least partially located in the accommodation space and connected to the second base 222. The main body 21, the adapter plate 40, and the second base 222 are stacked in sequence along the first direction X, with the first base 221 being in contact with the sidewall of the adapter plate 40.

[0171] One side surface of the tab connection portion 42 along the first direction X is coplanar with one side surface of the terminal connection portion 41 along the first direction X, and the other side surface of the tab connection portion 42 along the first direction X is coplanar with the other side surface of the terminal connection portion 41 along the first direction X.

[0172] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0173] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: a housing having a receiving cavity; An electrode assembly is accommodated in the accommodation cavity, wherein the electrode assembly includes a main body and tabs connected to each other; an electrode terminal, disposed on the housing and located on one side of the electrode assembly along the first direction; A transfer plate is accommodated in the accommodation cavity, and the transfer plate is connected to the tab and the electrode terminal respectively; Wherein, along the first direction, the adapter portion is arranged between the tab and the main body.

2. The battery cell according to claim 1, wherein: The housing includes a shell and an end cover assembly. The shell has an opening along the first direction. The end cover assembly includes a cover plate. The cover plate covers the opening and is enclosed with the shell to form the accommodating cavity. The electrode terminal is arranged on the cover plate.

3. The battery cell according to claim 1 or 2, characterized in that: The tab is bent and connected to a surface of the adapter plate facing away from the main body along the first direction.

4. The battery cell according to claim 1 or 2, characterized in that: The tab includes a first base and a second base arranged to intersect each other, the first base is connected between the main body and the second base, the first base, the second base and the main body form a receiving space, and the adapter is located in the receiving space and connected to the second base.

5. The battery cell according to claim 4, characterized in that The main body, the adapter plate, and the second base are stacked in sequence in the first direction, and the first base is attached to the side wall surface of the adapter plate.

6. The battery cell according to claim 1 or 2, characterized in that: The adapter plate has a notch, and the tab is passed through the notch and bent so that the adapter plate is partially located between the tab and the main body along the first direction.

7. The battery cell according to claim 6, characterized in that The adapter plate includes a terminal connecting portion and a tab connecting portion, the tab connecting portion is arranged on at least one side of the notch along the second direction, the terminal connecting portion is arranged on one side of the notch along the third direction, the tab connecting portion is connected to the tab, and the terminal connecting portion is connected to the electrode terminal, and the third direction intersects with the first direction and the second direction.

8. The battery cell according to claim 7, characterized in that The number of the tab connection parts is set to two or more, and the two or more tab connection parts are arranged side by side along the second direction, and the gap is formed between two adjacent tab connection parts.

9. The battery cell according to claim 8, characterized in that The number of the notches is set to be two or more, and the two or more notches are spaced apart and distributed along the second direction.

10. The battery cell according to any one of claims 7 to 9, characterized in that: The tab connection portion and the terminal connection portion are an integrated structure.

11. The battery cell according to any one of claims 7 to 9, characterized in that: Along the first direction, the thickness of the tab connecting portion is the same as the thickness of the terminal connecting portion.

12. The battery cell according to any one of claims 7 to 9, characterized in that: One side surface of the tab connection portion along the first direction is coplanar with one side surface of the terminal connection portion along the first direction, and the other side surface of the tab connection portion along the first direction is coplanar with the other side surface of the terminal connection portion along the first direction.

13. The battery cell according to any one of claims 7 to 9, characterized in that: The number of the electrode assemblies is set to n, where n is an even number, the number of the gaps is n / 2, the tabs of each two adjacent electrode assemblies are passed through the same gap, and the tabs of each two adjacent electrode assemblies are symmetrical and close to each other.

14. The battery cell according to any one of claims 7 to 9, characterized in that: The tabs of the same electrode assembly are arranged in pairs, and in the arrangement direction of the tabs arranged in pairs, the notches are arranged toward the tabs arranged in pairs.

15. A battery device, characterized in that: The invention comprises a plurality of battery cells according to any one of claims 1 to 14.

16. An electrical device, characterized in that: The invention comprises a plurality of battery cells according to any one of claims 1 to 14, or a battery device according to claim 15, wherein the battery cells or the battery device are used to store or provide electrical energy.

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