Battery monomer, battery and electric device

Abstract

The invention provides a battery monomer, a battery and a power utilization device, and belongs to the technical field of batteries. The battery cell includes a housing, an electrode terminal, an electrode assembly, and a current collecting member. The housing has a wall portion, and the electrode terminal is provided on the wall portion. The electrode assembly is accommodated within the housing, the wall portion is configured to support the electrode assembly, and the electrode assembly includes a body portion and a tab. The current collecting member is arranged between the wall part and the main body part, and the current collecting member is connected with the tab and the electrode terminal. In the thickness direction of the wall part, the tab is convexly arranged at one end, facing the wall part, of the main body part, and part of the tab extends between the current collecting component and the wall part. According to the single battery with the structure, the electrolyte can conveniently enter the main body part after climbing along with the tabs, on one hand, the effect that the main body part of the electrode assembly is infiltrated by the electrolyte can be improved, the use performance of the single battery can be improved, on the other hand, the phenomenon that the electrolyte between the current collecting component and the wall part is wasted can be effectively relieved, and the service life of the single battery is prolonged. And the utilization rate of the electrolyte is improved.

Description

Battery cells, batteries and electrical devices Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the electric vehicle sector, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also growing. As core components of new energy vehicles, batteries have high requirements for both safety and service life. Among them, battery cells are typically equipped with current collecting components, and the electrode assemblies have tabs. The tabs are connected to electrode terminals on the outer casing through the current collecting components to enable the input or output of electrical energy to the battery cells. However, battery cells with this structure often experience poor performance when used in an inverted position.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a battery cell, a battery, and an electrical device, which can effectively improve the performance of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery cell comprising a shell, an electrode terminal, an electrode assembly and a current collecting member; the shell has a wall portion; the electrode terminal is arranged on the wall portion; the electrode assembly is accommodated in the shell, and the wall portion is configured to support the electrode assembly, the electrode assembly comprises a main body portion and a tab, and along the thickness direction of the wall portion, the tab is protruded from one end of the main body portion facing the wall portion; the current collecting member is arranged between the wall portion and the main body, and the current collecting member connects the tab and the electrode terminal; wherein, along the thickness direction of the wall portion, part of the tab extends between the current collecting member and the wall portion.

[0006] In the above technical solution, the electrode assembly is arranged in the shell, and the wall portion is used to support the electrode assembly, that is, the battery cell is inverted, so that the wall portion of the battery cell provided with the electrode terminal is arranged downward, and the end of the electrode assembly provided with the pole ear is arranged downward, and the pole ear is set as the pole ear. The part of the pole ear is extended between the current collecting component and the wall portion, so that a part of the pole ear is located on the side of the current collecting component facing the wall portion in the thickness direction of the wall portion, so that the electrolyte located between the current collecting component and the wall portion when the battery cell is inverted for use can contact the pole ear, which is conducive to the electrolyte following the pole ear to climb and enter the main body of the electrode assembly. The battery cell with this structure can facilitate the electrolyte to enter the main body after following the pole ear to climb. On the one hand, it can improve the effect of the main body of the electrode assembly being infiltrated by the electrolyte, which is conducive to improving the performance of the battery cell. On the other hand, it can effectively alleviate the phenomenon of electrolyte being wasted between the current collecting component and the wall portion, which is conducive to improving the utilization rate of the electrolyte.

[0007] In some embodiments, the tab includes a first connecting segment; the first connecting segment is connected to the current collecting member, and along the thickness direction of the wall portion, the first connecting segment is located between the current collecting member and the wall portion.

[0008] In the above technical solution, by setting the first connecting section of the pole tab to be located between the current collecting member and the wall portion and connected to the current collecting member, the part of the pole tab located on the side of the current collecting member facing the wall portion is connected to the current collecting member to achieve electrical connection between the pole tab and the current collecting member. The battery cell adopting this structure is conducive to reducing the difficulty of connecting the pole tab and the current collecting member, thereby improving assembly efficiency.

[0009] In some embodiments, the first connecting section is connected to the current collecting member by welding.

[0010] In the above technical solution, welding is used to connect the first connecting section of the tab and the current collecting component. On the one hand, this is conducive to reducing the difficulty of connecting the first connecting section and the current collecting component, and on the other hand, it is conducive to improving the connection stability and reliability between the first connecting section and the current collecting component.

[0011] In some embodiments, the tab further includes a second connecting segment and a third connecting segment, the first connecting segment, the second connecting segment and the third connecting segment are connected in sequence, and the third connecting segment is connected to the main body; along the thickness direction of the wall portion, the first connecting segment is located on the side of the current collecting component away from the main body, and the third connecting segment is located on the side of the current collecting component facing the main body.

[0012] In the above technical solution, the electrode tab is composed of a first connecting segment, a second connecting segment and a third connecting segment connected in sequence. The third connecting segment is connected to the main body and is located on the side of the current collecting component facing the main body. The first connecting segment is located on the side of the current collecting component away from the main body and is connected to the current collecting component, so that the electrode tab has a portion extending between the current collecting component and the wall portion. The structure is simple and easy to implement.

[0013] In some embodiments, along a first direction, the second connecting segment is located at one end of the current collecting member, and the first direction is perpendicular to a thickness direction of the wall portion.

[0014] In the above technical solution, by setting the second connecting section of the pole ear to be located at one end of the current collecting member in the first direction, the pole ear is made into a structure bent around the current collecting member, so that the first connecting section and the third connecting section of the pole ear can be respectively located on both sides of the current collecting member. This structure of the battery cell is conducive to reducing the manufacturing difficulty of the pole ear and the assembly difficulty between the pole ear and the current collecting member.

[0015] In some embodiments, the battery cell includes two electrode assemblies; along the first direction, the main bodies of the two electrode assemblies are stacked, and the second connecting sections of the tabs of the two electrode assemblies with the same polarity are respectively located at both ends of the current collecting component.

[0016] In the above technical solution, the battery cell is provided with two electrode assemblies stacked along a first direction, and the second connecting sections of the pole ears of the two electrode assemblies with the same polarity are respectively located at the two ends of the current collecting member in the first direction, that is, the pole ears of the two electrode assemblies are respectively bent around the two ends of the current collecting member in the first direction, so that the pole ears of the two electrode assemblies have a portion located between the current collecting member and the wall portion, while the two electrode assemblies can share one current collecting member, which is beneficial to reducing the difficulty of assembling between the pole ears of the two electrode assemblies and the current collecting member.

[0017] In some embodiments, the current collecting member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is connected to the electrode terminal, and the second connecting portion is connected to the first connecting segment; wherein, along the thickness direction of the wall portion, the first connecting segment is located on the side of the second connecting portion away from the main body portion, and the projection of the first connecting segment does not overlap with the projection of the first connecting portion.

[0018] In the above technical solution, by setting the projection of the first connecting portion of the current collecting member used for connecting to the electrode terminal in the thickness direction of the wall portion to not overlap with the first connecting section of the electrode tab, the first connecting section of the electrode tab located between the current collecting member and the wall portion does not cover the first connecting portion of the current collecting member in the thickness direction of the wall portion, which is beneficial to reducing the shielding and interference effect of the first connecting section on the first connecting portion of the current collecting member, and thus can effectively ensure the connection quality between the first connecting portion and the electrode terminal.

[0019] In some embodiments, along the thickness direction of the wall portion, the first connecting portion has a first surface facing the wall portion, the second connecting portion has a second surface facing the wall portion, the first surface is connected to the electrode terminal, the second surface is connected to the first connecting segment, and the first surface is closer to the main body portion than the second surface.

[0020] In the above technical solution, the first connecting portion is used to connect the first surface of the electrode terminal and the second connecting portion is used to connect the second surface of the first connecting segment to be arranged in a structure spaced apart in the thickness direction of the wall, and the first surface is farther away from the wall than the second surface. On the one hand, it is convenient to distinguish the first connecting portion and the second connecting portion of the current collecting component during the assembly of the battery cell, which is beneficial to reduce the interference between each other. On the other hand, it can make the first connecting segment connected to the second surface closer to the wall, so that when the battery cell is inverted for use, the first connecting segment can be facilitated to contact with the electrolyte free between the current collecting component and the wall, which is beneficial for the electrolyte to climb up along the tab and enter the main body of the electrode assembly.

[0021] In some embodiments, the battery cell further includes a support frame; along a thickness direction of the wall portion, the support frame is disposed between the current collecting member and the main body, and a projection of the support frame does not overlap with a projection of the first connecting segment.

[0022] In the above technical solution, the battery cell is further provided with a support frame, which is arranged between the current collecting member and the main body, so that the support frame can support the main body of the electrode assembly, thereby increasing the force-bearing area of ​​the main body of the electrode assembly, thereby facilitating the alleviation of the phenomenon of excessive local stress in the main body of the electrode assembly due to localized force, thereby effectively reducing the risk of damage to the main body of the electrode assembly during use. In addition, by setting the projection of the support frame in the thickness direction of the wall portion so as not to overlap with the first connecting section of the tab, since the first connecting section is located on the side of the current collecting member facing away from the support frame, the current collecting member can support the first connecting section of the tab, eliminating the need for support via the support frame. As a result, the support frame of this structure can effectively save space and production materials while supporting the main body of the electrode assembly.

[0023] In some embodiments, the battery cell includes two electrode assemblies; the main bodies of the two electrode assemblies are stacked along a first direction, and the first direction is perpendicular to the thickness direction of the wall portion; wherein, along the first direction, the support frame is located between the tabs of the two electrode assemblies.

[0024] In the above technical solution, the battery cell is provided with two electrode assemblies stacked along a first direction. By arranging the support frame between the pole ears of the two electrode assemblies, the support frame can reduce the interference effect of the support frame on the pole ears while supporting the main body of the two electrode assemblies, so that the first connecting section of the pole ear is connected to the current collecting component, which is conducive to reducing the difficulty of assembly.

[0025] In some embodiments, the battery cell further includes a first insulating member; along the thickness direction of the wall portion, the first insulating member is arranged between the wall portion and the current collecting member to insulate and isolate the wall portion and the current collecting member; wherein, along the thickness direction of the wall portion, the first connecting section is located between the current collecting member and the first insulating member, and the first connecting section abuts against the first insulating member.

[0026] In the above technical solution, the battery cell is further provided with a first insulating member, and the first insulating member is disposed between the wall portion and the current collecting member along the thickness direction of the wall portion. The first insulating member insulates and isolates the current collecting member from the wall portion, thereby effectively reducing the risk of short circuits between the wall portion and the current collecting member. Furthermore, by disposing the first connecting section between the current collecting member and the first insulating member, and by abutting the first connecting section and the first insulating member, the first insulating member can, on the one hand, also insulate and isolate the electrode tab from the wall portion. On the other hand, when the battery cell is inverted for use, the first connecting section can facilitate better contact with the electrolyte free between the current collecting member and the first insulating member, facilitating the electrolyte to follow the tab up and enter the main body of the electrode assembly.

[0027] In some embodiments, a recess is provided on a side of the wall portion facing the main body portion along a thickness direction of the wall portion, and the recess is used for at least a portion of the tab.

[0028] In the above technical solution, by providing a recess on the side of the wall facing the main body, components such as the tabs can be accommodated in the recess of the wall, thereby effectively saving the internal space of the battery cell, which is beneficial to improving the internal space utilization rate of the battery cell and can provide a certain degree of protection for the tabs.

[0029] In some embodiments, a convex portion is formed at a position of the wall portion corresponding to the concave portion at a side of the wall portion away from the main body portion along a thickness direction of the wall portion.

[0030] In the above technical solution, a convex portion is formed on the other side of the wall portion corresponding to the position of the concave portion. The wall portion with this structure can be formed by stamping, which is beneficial to reducing the processing difficulty of the wall portion and reducing the weight of the wall portion, thereby improving the energy density of the battery cell.

[0031] In some embodiments, the housing includes a shell and an end cover; a receiving cavity with an opening is formed inside the shell, and the electrode assembly is received in the receiving cavity; the end cover closes the opening; wherein the end cover is the wall portion.

[0032] In the above technical solution, the wall portion of the shell is an end cover for closing the opening of the shell. The battery cell with this structure is convenient for assembling the electrode terminals and helps to reduce the difficulty of assembling the current collecting components and the pole ears, thereby effectively improving the production efficiency of the battery cell.

[0033] In some embodiments, the outer shell includes a shell and an end cover; the shell includes an integrally formed side wall and the wall portion, the side wall is arranged around the wall portion, and along the thickness direction of the wall portion, one end of the side wall is connected to the wall portion, and the other end is enclosed to form an opening, and the side wall and the wall portion jointly define a accommodating cavity for accommodating the electrode assembly; the end cover closes the opening.

[0034] In the above technical solution, the wall portion is a wall of the shell that is arranged opposite to the end cover in the thickness direction of the wall portion. The battery cell adopting this structure can keep the electrode terminals and other components away from the end cover, and there is no direct connection between the wall portion and the end cover, thereby alleviating the phenomenon that the force generated when the electrode terminals and other components pull or twist the wall portion acts on the end cover, thereby reducing the risk of connection failure between the end cover and the shell, and further helping to further reduce the risk of leakage of the battery cell during use.

[0035] In a second aspect, an embodiment of the present application further provides a battery comprising the above-mentioned battery cell.

[0036] In a third aspect, an embodiment of the present application further provides an electrical device comprising the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0039] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0040] FIG3 is a schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0041] FIG4 is an exploded view of the structure of a battery cell provided in some embodiments of the present application;

[0042] FIG5 is a schematic diagram illustrating the connection between a current collecting member and an electrode assembly according to some embodiments of the present application;

[0043] FIG6 is a cross-sectional view of a battery cell provided in some embodiments of the present application;

[0044] FIG7 is a partial enlarged view of the battery cell at point A shown in FIG6 ;

[0045] FIG8 is a schematic diagram of the connection between the electrode assembly and the current collecting member according to some embodiments of the present application;

[0046] FIG9 is a schematic structural diagram of a current collecting component provided in some embodiments of the present application;

[0047] FIG10 is a front view of a current collecting member provided in some embodiments of the present application in a second direction;

[0048] FIG11 is a cross-sectional view of a wall portion of a housing provided in some embodiments of the present application.

[0049] Icons: 1000-vehicle; 100-battery; 10-box; 11-first box body; 12-second box body; 20-battery cell; 21-housing; 211-wall; 2111-lead-out hole; 2112-recess; 2113-convex; 212-housing; 2121-opening; 2122-accommodation cavity; 213-end cover; 22-electrode terminal; 221-rivet block; 23-electrode assembly; 231-main body; 232-electrode tab; 2 321-first connecting section; 2322-second connecting section; 2323-third connecting section; 24-current collecting member; 241-first connecting portion; 2411-first surface; 242-second connecting portion; 2421-second surface; 25-first insulating member; 26-second insulating member; 27-sealing member; 28-pressure relief mechanism; 29-support frame; 200-controller; 300-motor; X-thickness direction of the wall; Y-first direction; Z-second direction. DETAILED DESCRIPTION

[0050] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0052] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0055] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0056] The term "plurality" used in this application refers to two or more (including two).

[0057] 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.

[0058] 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.

[0059] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0060] 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.

[0061] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0062] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0063] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0064] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0065] As an example, the negative electrode current collector can be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium can be used. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0066] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0067] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0068] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate.

[0069] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0070] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0071] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0072] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0073] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0074] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0075] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0076] In some embodiments, the electrode assembly is a laminate structure.

[0077] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0078] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0079] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0080] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0081] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0082] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0083] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0084] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0085] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0086] Batteries, with their outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient, are an important component of today's new energy development. However, with the continuous development of battery technology, higher requirements are also being placed on battery performance.

[0087] For general battery cells, the outer shell of the battery cell usually includes a shell and an end cover, and the end cover is covered with the opening of the shell. In order to facilitate the assembly of the battery cell, the electrode terminal is usually assembled to the end cover of the battery cell, so that when the end cover is covered with the shell, the electrode terminal, the current collecting member and the tab can be stacked and welded to each other first to realize the electrical connection between the electrode terminal and the electrode assembly, so that the electrode terminal is used as the output pole of the battery cell to realize the input or output of the electrical energy of the battery cell, and finally the end cover is connected to the shell.

[0088] The inventors have found that the current collecting member usually serves to connect the electrode terminal and the tab of the electrode assembly. The current collecting member is arranged between the electrode terminal and the tab of the electrode assembly so that the electrode terminal and the tab of the electrode assembly can be connected through the current collecting member, thereby reducing the difficulty of assembling the tab and the electrode terminal. However, when the battery cell adopting this structure is used in an inverted manner, that is, when the tab of the electrode assembly is set vertically downward, the electrolyte contained in the shell is easily accumulated between the current collecting member and the end cover, so that the electrolyte located between the current collecting member and the end cover cannot contact the tab, so that the electrolyte cannot follow the tab to climb and enter the electrode assembly for infiltration under the action of capillary phenomenon, thereby easily causing the electrolyte located between the current collecting member and the end cover to be unable to be effectively utilized, resulting in a low utilization rate of the electrolyte, and easily causing the electrolyte to be unable to follow the tab to climb and enter the electrode assembly, so that the electrode assembly is not well infiltrated by the electrolyte, which is not conducive to improving the performance of the battery cell during use.

[0089] Based on the above considerations, and in order to address the issue of poor performance of battery cells, the inventors, after in-depth research, have designed a battery cell comprising a housing, electrode terminals, an electrode assembly, and a current collecting member. The housing comprises a wall portion, on which the electrode terminals are disposed. The electrode assembly is housed within the housing, and the wall portion is configured to support the electrode assembly. The electrode assembly comprises a main body portion and a tab, with the tab protruding from one end of the main body portion facing the wall portion along the thickness direction of the wall portion. The current collecting member is disposed between the wall portion and the main body portion, connecting the tab to the electrode terminal. Along the thickness direction of the wall portion, a portion of the tab extends between the current collecting member and the wall portion.

[0090] In a battery cell of this structure, the electrode assembly is arranged in the shell, and the wall portion is used to support the electrode assembly, that is, the battery cell is arranged inverted, so that the wall portion of the battery cell provided with the electrode terminal is arranged downward, and the end of the electrode assembly provided with the pole ear is arranged downward, and the pole ear is set to extend the part of the pole ear between the current collecting member and the wall portion, so that a part of the pole ear is located on the side of the current collecting member facing the wall portion in the thickness direction of the wall portion, so that the electrolyte located between the current collecting member and the wall portion when the battery cell is used inverted can contact the pole ear, which is conducive to the electrolyte climbing up with the pole ear and entering the main body of the electrode assembly. The battery cell with this structure can facilitate the electrolyte to enter the main body after following the pole ear to climb. On the one hand, it can improve the effect of the main body of the electrode assembly being infiltrated by the electrolyte, which is conducive to improving the performance of the battery cell. On the other hand, it can effectively alleviate the phenomenon of electrolyte being wasted between the current collecting member and the wall portion, which is conducive to improving the utilization rate of the electrolyte.

[0091] The battery cells disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells and batteries disclosed in this application can be used to construct such electrical devices. This can help address issues such as poor electrode assembly wetting and low electrode liquid utilization, thereby improving the performance of the battery cells.

[0092] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0093] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0094] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 can be arranged at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can be used as an operating power source or a power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0095] In some embodiments of the present application, the battery 100 can not only serve as the operating power source or usage power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0096] 2 and 3 , FIG2 is an exploded view of a battery 100 according to some embodiments of the present invention, and FIG3 is a schematic diagram of a battery cell 20 according to some embodiments of the present invention. The battery 100 includes a housing 10 and a battery cell 20 , wherein the battery cell 20 is accommodated in the housing 10 .

[0097] The housing 10 is used to provide assembly space for the battery cells 20 and can have various structures. In some embodiments, the housing 10 can include a first housing body 11 and a second housing body 12. The first housing body 11 and the second housing body 12 overlap each other, and the first housing body 11 and the second housing body 12 together define an assembly space for accommodating the battery cells 20. The second housing body 12 can be a hollow structure with one end open. The first housing body 11 can be a plate-like structure, and the first housing body 11 overlaps the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 jointly define the assembly space. The first housing body 11 and the second housing body 12 can also be hollow structures with one end open, with the open side of the first housing body 11 overlapping the open side of the second housing body 12. Of course, the housing 10 formed by the first housing body 11 and the second housing body 12 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc. For example, in Figure 2, the housing 10 is in the shape of a rectangular parallelepiped.

[0098] In the battery 100, the number of battery cells 20 disposed in the housing 10 may be one or more. When there are multiple battery cells 20 disposed in the housing 10, the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 may be accommodated in the housing 10. Of course, the battery 100 may also be a battery module formed by first connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules may be connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the housing 10. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar component, which is used to connect the multiple battery cells 20 to achieve electrical connection between the multiple battery cells 20.

[0099] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be cylindrical, flat, rectangular, or in other shapes. For example, in FIG3 , the battery cell 20 is a rectangular parallelepiped.

[0100] According to some embodiments of the present application, referring to FIG3 and further to FIG4, FIG5, FIG6, and FIG7, FIG4 is an exploded view of a battery cell 20 according to some embodiments of the present application, FIG5 is a schematic diagram of the connection between a current collecting member 24 and an electrode assembly 23 according to some embodiments of the present application, FIG6 is a cross-sectional view of a battery cell 20 according to some embodiments of the present application, and FIG7 is a partial enlarged view of a portion A of the battery cell 20 shown in FIG6. The present application provides a battery cell 20 comprising a housing 21, an electrode terminal 22, an electrode assembly 23, and a current collecting member 24. The housing 21 has a wall 211. The electrode terminal 22 is disposed on the wall 211. The electrode assembly 23 is housed within the housing 21. The wall 211 is configured to support the electrode assembly 23. The electrode assembly 23 comprises a main body 231 and a tab 232. The tab 232 protrudes from one end of the main body 231 facing the wall 211 along the thickness direction X of the wall. The current collecting member 24 is disposed between the wall portion 211 and the main body portion 231 and connects the tab 232 to the electrode terminal 22. Along the thickness direction X of the wall portion, a portion of the tab 232 extends between the current collecting member 24 and the wall portion 211.

[0101] The housing 21 can also be used to contain an electrolyte, such as an electrolyte solution. The housing 21 can have various structural forms, such as a cylinder or a rectangular parallelepiped. Similarly, the housing 21 can be made of various materials, such as copper, iron, aluminum, steel, or an aluminum alloy.

[0102] In some embodiments, the housing 21 may include a shell 212 and an end cover 213, and a accommodating cavity 2122 is formed inside the shell 212, and the accommodating cavity 2122 is used to accommodate the electrode assembly 23, and the accommodating cavity 2122 has an opening 2121, that is, the shell 212 is a hollow structure with an opening 2121 at one end, and the end cover 213 covers the opening 2121 of the shell 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 23 and the electrolyte.

[0103] It should be noted that the wall portion 211 for mounting the electrode terminal 22 can be the end cap 213 or a wall of the housing 212. For example, in Figures 3 and 4, the wall portion 211 is the end cap 213. Of course, the structure of the battery cell 20 is not limited to this. In other embodiments, the wall portion 211 can also be the bottom wall of the housing 212 disposed opposite the end cap 213, or the side wall of the housing 212 and the end cap 213 adjacent to and abutting each other.

[0104] When assembling the battery cell 20 , the electrode assembly 23 may be placed in the housing 212 and filled with electrolyte. The end cap 213 may then be placed on the opening 2121 of the housing 212 to complete the assembly of the battery cell 20 .

[0105] The housing 212 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, or a prismatic structure. The shape of the housing 212 can be determined based on the specific shape of the electrode assembly 23. For example, if the electrode assembly 23 has a cylindrical structure, a cylindrical housing 212 can be selected; if the electrode assembly 23 has a rectangular parallelepiped structure, a rectangular parallelepiped housing 212 can be selected. Of course, the structure of the end cap 213 can also be various, such as a plate-like structure or a hollow structure with one end open. For example, in Figure 4, the housing 212 has a rectangular parallelepiped structure.

[0106] Of course, it is understandable that the shell 21 is not limited to the above structure. The shell 21 may also be other structures. For example, the shell 21 may include a shell 212 and two end covers 213. The shell 212 is a hollow structure with openings 2121 on opposite sides. One end cover 213 corresponds to an opening 2121 of the shell 212 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 23 and the electrolyte. That is, the shell 212 is formed with openings 2121 on opposite sides, and the two end covers 213 are respectively covered on both sides of the shell 212 to close the corresponding openings 2121.

[0107] It should be noted that the electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The main body 231 of the electrode assembly 23 may include a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly 23 may have various structures. For example, the main body 231 of the electrode assembly 23 may be a wound structure formed by winding the positive electrode sheet, the separator, and the negative electrode sheet, or a stacked structure formed by stacking the positive electrode sheet, the separator, and the negative electrode sheet. The tabs 232 of the electrode assembly 23 are components formed by stacking and connecting the regions of the positive electrode sheet that are not coated with the positive electrode active material layer, or by stacking and connecting the regions of the negative electrode sheet that are not coated with the negative electrode active material layer.

[0108] The tab 232 protrudes from one end of the main body 231 facing the wall 211. Specifically, the tab 232 is connected to one end of the main body 231 that is closer to the wall 211 in the thickness direction X of the wall. In other words, the tab 232 is formed on one end of the electrode assembly 23 that is closer to the wall 211 in the thickness direction X of the wall. The tab 232 is used to connect to the electrode terminal 22 to enable input or output of electrical energy from the battery cell 20.

[0109] The wall portion 211 is configured to support the electrode assembly 23, that is, the battery cell 20 is placed upside down in the box body 10, so that the wall portion 211 can support the electrode assembly 23 in the thickness direction X of the wall portion, that is, the end of the battery cell 20 provided with the electrode terminal 22 is set toward the bottom of the box body 10 in the thickness direction X of the wall portion, or in actual use, the end of the battery cell 20 provided with the electrode terminal 22 is set toward the ground or downward, so that the thickness direction X of the wall portion is the up and down direction.

[0110] Part of the pole tab 232 extends between the current collecting component 24 and the wall portion 211, that is, part of the pole tab 232 is located between the current collecting component 24 and the wall portion 211 in the thickness direction X of the wall portion, that is, part of the pole tab 232 extends to the side of the current collecting component 24 away from the main body 231 in the thickness direction X of the wall portion.

[0111] For example, in Figures 5 and 7, the pole ear 232 is a structure that is bent around the current collecting component 24, so that part of the pole ear 232 extends between the current collecting component 24 and the wall portion 211. Of course, in other embodiments, a through hole for the pole ear 232 to pass through may be provided on the current collecting component 24. By passing the pole ear 232 through the through hole, part of the pole ear 232 may also be extended between the current collecting component 24 and the wall portion 211.

[0112] The number of electrode assemblies 23 housed within the housing 21 may be one or more. For example, in FIG4 , the housing 21 of the battery cell 20 is provided with two electrode assemblies 23 , with the main bodies 231 of the two electrode assemblies 23 stacked along the thickness direction of the main bodies 231 , i.e., the main bodies 231 of the two electrode assemblies 23 are stacked along the thickness direction of the battery cell 20 . Of course, in other embodiments, the number of electrode assemblies 23 housed within the housing 21 may also be one, three, four, five, six, or seven, etc., stacked.

[0113] For example, in FIG4 , each electrode assembly 23 has two tabs 232 , and both tabs 232 are connected to one end of the main body 231 facing the wall 211 in the thickness direction X of the wall. The two tabs 232 are respectively used to output or input the positive and negative electrodes of the electrode assembly 23. If the tabs 232 are used to output the positive electrode of the electrode assembly 23, the tabs 232 are formed by stacking and connecting the regions of the positive electrode sheet that are not coated with the positive electrode active material layer; if the tabs 232 are used to output the negative electrode of the electrode assembly 23, the tabs 232 are formed by stacking and connecting the regions of the negative electrode sheet that are not coated with the negative electrode active material layer.

[0114] Correspondingly, the battery cell 20 includes two electrode terminals 22 and two current collecting members 24. The two electrode terminals 22 are both installed on the wall portion 211. Each current collecting member 24 connects an electrode terminal 22 and a tab 232 of each electrode assembly 23 to realize the input or output of the positive and negative electrodes of the battery cell 20.

[0115] The electrode terminals 22 function to output or input electrical energy into the battery cells 20, while the current collecting members 24 connect the electrode terminals 22 to the tabs 232. The electrode terminals 22 and the current collecting members 24 can be made of a variety of materials, such as copper, iron, aluminum, steel, or aluminum alloys. Similarly, the connection between the electrode terminals 22 and the current collecting members 24 can be achieved through a variety of methods, such as welding, clamping, or abutting. In the present embodiment, the electrode terminals 22 and the current collecting members 24 are welded to each other.

[0116] Optionally, as shown in Figures 4 and 7, the battery cell 20 may further include a first insulating member 25. Along the thickness direction X of the wall portion, at least a portion of the first insulating member 25 is located between the wall portion 211 and the current collecting member 24 to insulate and isolate the wall portion 211 and the current collecting member 24, thereby helping to reduce the risk of short circuit between the current collecting member 24 and the wall portion 211.

[0117] For example, the first insulating member 25 may be made of plastic, rubber, or silicone.

[0118] In Figure 7 , the wall portion 211 is provided with lead-out holes 2111. These lead-out holes 2111 correspond one-to-one with the electrode terminals 22. The lead-out holes 2111 extend along the wall portion's thickness direction X and penetrate both sides of the wall portion 211 along the wall portion's thickness direction X. Each electrode terminal 22 is correspondingly positioned within a lead-out hole 2111, thereby mounting the electrode terminal 22 on the wall portion 211. In the wall portion's thickness direction X, one end of the electrode terminal 22 is connected to the current collecting member 24, and the other end is used to connect to the current collecting component within the battery 100, thereby enabling the input or output of electrical energy from the battery cell 20.

[0119] The electrode terminal 22 is insulated and mounted on the wall portion 211 , that is, no electrical connection is formed between the electrode terminal 22 and the wall portion 211 , that is, no electrical connection is formed between the electrode terminal 22 and the end cover 213 of the housing 21 .

[0120] Optionally, a rivet block 221 is also connected to the electrode terminal 22. Along the thickness direction X of the wall, the rivet block 221 is arranged on the side of the wall 211 away from the first insulating member 25, and the rivet block 221 is connected to the end of the electrode terminal 22 away from the current collecting component 24 to fasten the electrode terminal 22 to the wall 211.

[0121] In some embodiments, as shown in FIG7 , the battery cell 20 may further include a second insulating member 26 and a sealing member 27 . Along the thickness direction X of the wall portion, at least a portion of the second insulating member 26 is disposed between the rivet block 221 and the wall portion 211 to insulate and isolate the rivet block 221 from the wall portion 211, thereby advantageously reducing the risk of short circuit between the rivet block 221 and the wall portion 211. At least a portion of the sealing member 27 is disposed within the lead-out hole 2111 to seal the gap between the electrode terminal 22 and the wall of the lead-out hole 2111, thereby advantageously reducing the risk of electrolyte leakage within the battery cell 20.

[0122] For example, the second insulating member 26 can be made of various materials, such as plastic, rubber, or silicone, etc. Similarly, the sealing member 27 can also be made of various materials, such as plastic, rubber, or silicone, etc.

[0123] In some embodiments, as shown in Figures 3 and 4 , the battery cell 20 may further include a pressure relief mechanism 28 mounted on the housing 21. Optionally, the pressure relief mechanism 28 may be mounted on the end cap 213 or the housing 212. Similarly, the battery cell 20 may include one or more pressure relief mechanisms 28. The pressure relief mechanism 28 is used to relieve pressure within the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined value.

[0124] Exemplarily, the battery cell 20 is provided with only one pressure relief mechanism 28 , and the pressure relief mechanism 28 is mounted on the end cover 213 . The pressure relief mechanism 28 may be a pressure relief component such as an explosion-proof valve, an explosion-proof disk, an air valve, a pressure relief valve or a safety valve.

[0125] The electrode assembly 23 is arranged in the shell 21, and the wall portion 211 is used to support the electrode assembly 23, that is, the battery cell 20 is inverted, so that the wall portion 211 of the battery cell 20 provided with the electrode terminal 22 is arranged downward, and the end of the electrode assembly 23 provided with the pole ear 232 is arranged downward, by setting the pole ear 232 to extend the portion of the pole ear 232 between the current collecting member 24 and the wall portion 211, so that a portion of the pole ear 232 is located on the side of the current collecting member 24 facing the wall portion 211 in the thickness direction X of the wall portion, so that the battery cell 20 is located on the current collecting member 24 when used inverted. The electrolyte between the component 24 and the wall portion 211 can contact the pole ear 232, which is beneficial for the electrolyte to follow the pole ear 232 to climb and enter the main body 231 of the electrode assembly 23. The battery cell 20 adopting this structure can facilitate the electrolyte to follow the pole ear 232 to climb and then enter the main body 231. On the one hand, it can improve the effect of the main body 231 of the electrode assembly 23 being infiltrated by the electrolyte, which is beneficial to improving the performance of the battery cell 20. On the other hand, it can effectively alleviate the phenomenon of electrolyte being wasted between the current collecting component 24 and the wall portion 211, which is beneficial to improving the utilization rate of the electrolyte.

[0126] According to some embodiments of the present application, referring to Figures 5 and 7, and further referring to Figure 8, Figure 8 is a schematic diagram of the connection between the electrode assembly 23 and the current collecting member 24 provided in some embodiments of the present application. The electrode tab 232 includes a first connecting segment 2321, which is connected to the current collecting member 24 and is located between the current collecting member 24 and the wall portion 211 along the thickness direction X of the wall portion.

[0127] The tab 232 includes a first connecting section 2321 located between the current collecting member 24 and the wall portion 211 . That is, the portion of the tab 232 extending between the current collecting member 24 and the wall portion 211 is the first connecting section 2321 of the tab 232 .

[0128] For example, the first connection section 2321 and the current collecting member 24 may be connected in various ways, such as welding, bonding, clamping or abutting.

[0129] By setting the first connecting section 2321 of the pole tab 232 to be located between the current collecting component 24 and the wall portion 211 and connected to the current collecting component 24, the portion of the pole tab 232 located on the side of the current collecting component 24 facing the wall portion 211 is connected to the current collecting component 24 to achieve electrical connection between the pole tab 232 and the current collecting component 24. The battery cell 20 adopting this structure is beneficial to reducing the difficulty of connecting the pole tab 232 and the current collecting component 24, thereby improving assembly efficiency.

[0130] In some embodiments, the first connecting segment 2321 is connected to the current collecting member 24 by welding.

[0131] Illustratively, the first connecting section 2321 and the current collecting member 24 are connected by ultrasonic welding.

[0132] The first connecting section 2321 of the tab 232 is connected to the current collecting component 24 by welding. This helps to reduce the difficulty of connecting the first connecting section 2321 and the current collecting component 24, and improves the connection stability and reliability between the first connecting section 2321 and the current collecting component 24.

[0133] According to some embodiments of the present application, as shown in Figures 5, 7, and 8, the tab 232 further includes a second connecting segment 2322 and a third connecting segment 2323. The first connecting segment 2321, the second connecting segment 2322, and the third connecting segment 2323 are sequentially connected, and the third connecting segment 2323 is connected to the main body 231. Along the thickness direction X of the wall portion, the first connecting segment 2321 is located on the side of the current collecting member 24 facing away from the main body 231, and the third connecting segment 2323 is located on the side of the current collecting member 24 facing the main body 231.

[0134] Among them, the first connecting section 2321 is located on the side of the current collecting component 24 away from the main body 231, and the third connecting section 2323 is located on the side of the current collecting component 24 facing the main body 231. That is, the first connecting section 2321 and the third connecting section 2323 connected to the pole ear 232 by the second connecting section 2322 are respectively located on both sides of the current collecting component 24 in the thickness direction X of the wall portion, and the third connecting section 2323 is connected to the main body 231, and the first connecting section 2321 is connected to the side of the current collecting component 24 away from the third connecting section 2323.

[0135] It should be noted that the assembly relationship between the second connecting segment 2322 and the current collecting component 24 can be various. For example, the second connecting segment 2322 can be located at one end in a direction perpendicular to the thickness direction X of the wall portion, so that the pole ear 232 is a bent structure around the current collecting component 24. Alternatively, a through hole can be provided on the current collecting component 24 for the second connecting segment 2322 of the pole ear 232 to pass through, so that after the second connecting segment 2322 passes through the current collecting component 24, the first connecting segment 2321 and the third connecting segment 2323 can be respectively located on both sides of the current collecting component 24.

[0136] The pole ear 232 is composed of a first connecting segment 2321, a second connecting segment 2322 and a third connecting segment 2323 connected in sequence. The third connecting segment 2323 is connected to the main body 231 and is located on the side of the current collecting component 24 facing the main body 231. The first connecting segment 2321 is located on the side of the current collecting component 24 away from the main body 231 and is connected to the current collecting component 24, so that the pole ear 232 has a portion extending between the current collecting component 24 and the wall portion 211. The structure is simple and easy to implement.

[0137] In some embodiments, as shown in FIG. 7 , along a first direction Y, the second connecting segment 2322 is located at one end of the current collecting member 24 , and the first direction Y is perpendicular to a thickness direction X of the wall portion.

[0138] It should be noted that the first direction Y is perpendicular to the thickness direction X of the wall portion, and the first direction Y can be the length direction of the wall portion 211 or the width direction of the wall portion 211. For example, in Figures 4 and 7, the wall portion 211 is the end cap 213 of the housing 21, and the first direction Y is the width direction of the wall portion 211, that is, the width direction of the wall portion 211 is the same as that of the end cap 213, and is also the same as the thickness direction of the main body 231 of the electrode assembly 23.

[0139] By setting the second connecting section 2322 of the pole tab 232 to be located at one end of the current collecting component 24 in the first direction Y, the pole tab 232 is made into a structure bent around the current collecting component 24, so that the first connecting section 2321 and the third connecting section 2323 of the pole tab 232 can be respectively located on both sides of the current collecting component 24. This structure of the battery cell 20 is conducive to reducing the manufacturing difficulty of the pole tab 232 and the assembly difficulty between the pole tab 232 and the current collecting component 24.

[0140] According to some embodiments of the present application, as shown in Figures 4, 7 and 8, the battery cell 20 includes two electrode assemblies 23, and the main bodies 231 of the two electrode assemblies 23 are stacked along the first direction Y, and the second connecting sections 2322 of the tabs 232 with the same polarity of the two electrode assemblies 23 are respectively located at both ends of the current collecting component 24.

[0141] The main bodies 231 of the two electrode assemblies 23 are stacked along the first direction Y, that is, the main bodies 231 of the two electrode assemblies 23 are stacked along the thickness direction of the main bodies 231 .

[0142] The second connecting sections 2322 of the pole tabs 232 with the same polarity of the two electrode assemblies 23 are respectively located at the two ends of the current collecting component 24, that is, the pole tabs 232 of the positive or negative poles in the two electrode assemblies 23 are respectively bent from the two ends of the current collecting component 24 in the first direction Y to the side of the current collecting component 24 facing the wall 211, so that the second connecting sections 2322 of the pole tabs 232 with the same polarity of the two electrode assemblies 23 are respectively located at the two ends of the current collecting component 24 in the first direction Y, that is, the second connecting sections 2322 of the pole tabs 232 with the same polarity of the two electrode assemblies 23 are arranged facing each other in the first direction Y.

[0143] In Figures 4 and 5 , each electrode assembly 23 has two tabs 232 of opposite polarity, respectively used to output the positive and negative electrodes of the electrode assembly 23 . The two tabs 232 are spaced apart along the second direction Z, with the wall thickness direction X, the first direction Y, and the second direction Z being perpendicular to each other. Correspondingly, the battery cell 20 has two current collecting members 24 spaced apart along the second direction Z. Each current collecting member 24 is used to connect to the tabs 232 of the same polarity of multiple electrode assemblies 23 . Similarly, the battery cell 20 is provided with two electrode terminals 22 spaced apart along the second direction Z on the wall 211 . Each electrode terminal 22 is connected to a current collecting member 24 , thereby enabling the output or input of the positive and negative electrodes of the battery cell 20 .

[0144] The battery cell 20 is provided with two electrode assemblies 23 stacked along the first direction Y, and the second connecting sections 2322 of the pole tabs 232 of the two electrode assemblies 23 with the same polarity are respectively located at the two ends of the collecting component 24 in the first direction Y, that is, the pole tabs 232 of the two electrode assemblies 23 are respectively bent around the two ends of the collecting component 24 in the first direction Y, so that the pole tabs 232 of the two electrode assemblies 23 have a portion located between the collecting component 24 and the wall portion 211, while the two electrode assemblies 23 can share one collecting component 24, which is beneficial to reducing the difficulty of assembly between the pole tabs 232 of the two electrode assemblies 23 and the collecting component 24.

[0145] According to some embodiments of the present application, referring to Figures 7 and 8, and further referring to Figure 9, which is a schematic structural diagram of a current collecting member 24 provided in some embodiments of the present application, the current collecting member 24 includes a first connecting portion 241 and a second connecting portion 242 connected to each other. The first connecting portion 241 is connected to the electrode terminal 22, and the second connecting portion 242 is connected to the first connecting segment 2321. Along the thickness direction X of the wall portion, the first connecting segment 2321 is located on the side of the second connecting portion 242 that faces away from the main body 231, and the projection of the first connecting segment 2321 does not overlap with the projection of the first connecting portion 241.

[0146] Among them, the first connection part 241 and the second connection part 242 can be an integral structure or a split structure. If the first connection part 241 and the second connection part 242 are an integral structure, the first connection part 241 and the second connection part 242 can be formed by stamping or casting technology; if the first connection part 241 and the second connection part 242 are a split structure, the first connection part 241 and the second connection part 242 can be connected by welding, clamping, etc.

[0147] Exemplarily, the battery cell 20 includes two electrode assemblies 23, and the two electrode assemblies 23 are stacked along the first direction Y. Correspondingly, the current collecting member 24 includes two second connecting portions 242, which are respectively connected to the two ends of the first connecting portion 241 in the first direction Y, and each second connecting portion 242 is connected to the first connecting section 2321 of a pole ear 232 of an electrode assembly 23.

[0148] The first connecting section 2321 is located on a side of the second connecting portion 242 away from the main body 231 , that is, in the thickness direction X of the wall, the first connecting section 2321 is located between the second connecting portion 242 and the wall 211 .

[0149] The projection of the first connecting section 2321 does not overlap with the projection of the first connecting portion 241, that is, the first connecting section 2321 and the first connecting portion 241 are staggered in the thickness direction X of the wall, so that the first connecting section 2321 does not cover the first connecting portion 241 in the thickness direction X of the wall.

[0150] By setting the projection of the first connecting portion 241 of the current collecting member 24 used for interconnecting with the electrode terminal 22 in the thickness direction X of the wall portion to not overlap with the first connecting section 2321 of the pole tab 232, the first connecting section 2321 of the pole tab 232 located between the current collecting member 24 and the wall portion 211 does not cover the first connecting portion 241 of the current collecting member 24 in the thickness direction X of the wall portion, thereby helping to reduce the blocking and interference effects of the first connecting section 2321 on the first connecting portion 241 of the current collecting member 24, thereby effectively ensuring the connection quality between the first connecting portion 241 and the electrode terminal 22.

[0151] According to some embodiments of the present application, referring to FIG. 7 and FIG. 8 , and further referring to FIG. 10 , FIG. 10 is a front view of the current collecting member 24 provided in some embodiments of the present application in the second direction Z. Along the thickness direction X of the wall portion, the first connecting portion 241 has a first surface 2411 facing the wall portion 211 , and the second connecting portion 242 has a second surface 2421 facing the wall portion 211 . The first surface 2411 is connected to the electrode terminal 22 , and the second surface 2421 is connected to the first connecting segment 2321 . The first surface 2411 is closer to the main body 231 than the second surface 2421 .

[0152] The first connection portion 241 has a first surface 2411 facing the wall portion 211 , and the first surface 2411 is connected to the electrode terminal 22 , that is, the first connection portion 241 is connected to the electrode terminal 22 on one side facing the wall portion 211 in the thickness direction X of the wall portion.

[0153] The second connection portion 242 has a second surface 2421 facing the wall portion 211 , and the second surface 2421 is connected to the first connection segment 2321 , that is, the second connection portion 242 is connected to the first connection segment 2321 of the tab 232 on one side facing the wall portion 211 in the thickness direction X of the wall portion.

[0154] The first surface 2411 is closer to the main body 231 than the second surface 2421. That is, in the thickness direction X of the wall, the second connection portion 242 protrudes from the first surface 2411 of the first connection portion 241 toward the wall 211, so that the second surface 2421 of the second connection portion 242 is farther away from the main body 231 than the first surface 2411 of the first connection portion 241.

[0155] By setting the first connecting portion 241 for connecting to the first surface 2411 of the electrode terminal 22 and the second connecting portion 242 for connecting to the second surface 2421 of the first connecting segment 2321 as a structure spaced apart in the thickness direction X of the wall, and the first surface 2411 is farther away from the wall 211 than the second surface 2421, on the one hand, it is convenient to distinguish the first connecting portion 241 and the second connecting portion 242 of the current collecting member 24 during the assembly of the battery cell 20, which is beneficial to reduce the interference between each other. On the other hand, it can make the first connecting segment 2321 connected to the second surface 2421 closer to the wall 211, so that when the battery cell 20 is inverted for use, it is convenient for the first connecting segment 2321 to contact the electrolyte free between the current collecting member 24 and the wall 211, which is beneficial for the electrolyte to climb along the tab 232 and enter the main body 231 of the electrode assembly 23.

[0156] According to some embodiments of the present application, as shown in Figures 6 and 7 , the battery cell 20 may further include a support frame 29. Along the thickness direction X of the wall portion, the support frame 29 is disposed between the current collecting member 24 and the main body 231, and the projection of the support frame 29 does not overlap with the projection of the first connecting section 2321.

[0157] The support frame 29 is disposed between the current collecting member 24 and the main body 231, so that the support frame 29 can provide support to the main body 231 of the electrode assembly 23. The support frame 29 can be made of various materials, such as rubber, plastic, or silicone.

[0158] The projection of the support frame 29 does not overlap with the projection of the first connecting segment 2321, that is, in the thickness direction X of the wall, the support frame 29 and the first connecting segment 2321 of the pole ear 232 are staggered, so that the first connecting segment 2321 of the pole ear 232 does not cover the support frame 29 in the thickness direction X of the wall.

[0159] The battery cell 20 is also provided with a support frame 29, which is arranged between the current collecting component 24 and the main body 231, so that the support frame 29 can support the main body 231 of the electrode assembly 23 to increase the force-bearing area of ​​the main body 231 of the electrode assembly 23, thereby helping to alleviate the phenomenon that the local stress of the main body 231 of the electrode assembly 23 is excessive due to the force applied to the local area of ​​the main body 231, thereby effectively reducing the risk of the main body 231 of the electrode assembly 23 being damaged during use. In addition, by setting the projection of the support frame 29 in the thickness direction X of the wall to not overlap with the first connecting segment 2321 of the pole ear 232, since the first connecting segment 2321 is located on the side of the current collecting component 24 away from the support frame 29, the first connecting segment 2321 of the pole ear 232 can be supported by the current collecting component 24, and there is no need for support through the support frame 29. Therefore, the support frame 29 with this structure can effectively save the space occupied by the support frame 29 and production materials while supporting the main body 231 of the electrode assembly 23.

[0160] In some embodiments, referring to Figures 6 and 7 , a battery cell 20 includes two electrode assemblies 23 . The main bodies 231 of the two electrode assemblies 23 are stacked along a first direction Y, which is perpendicular to the wall thickness direction X. Along the first direction Y, the support frame 29 is positioned between the tabs 232 of the two electrode assemblies 23 .

[0161] The battery cell 20 is provided with two electrode assemblies 23 stacked along the first direction Y. By setting the support frame 29 between the pole ears 232 of the two electrode assemblies 23, the support frame 29 can support the main body 231 of the two electrode assemblies 23 while reducing the interference effect of the support frame 29 on the pole ears 232, so that the first connecting section 2321 of the pole ear 232 is connected to the current collecting component 24, which is conducive to reducing the difficulty of assembly.

[0162] According to some embodiments of the present application, as shown in Figures 4, 6, and 7, the battery cell 20 may further include a first insulating member 25. Along the thickness direction X of the wall portion, the first insulating member 25 is disposed between the wall portion 211 and the current collecting member 24 to insulate and separate the wall portion 211 from the current collecting member 24. Along the thickness direction X of the wall portion, the first connecting segment 2321 is located between the current collecting member 24 and the first insulating member 25, and the first connecting segment 2321 abuts against the first insulating member 25.

[0163] The first insulating member 25 serves to insulate and isolate the wall 211 of the housing 21 and the current collecting member 24 , as well as the wall 211 of the housing 21 and the first connecting section 2321 of the tab 232 . The first insulating member 25 may be made of rubber, plastic, or silicone.

[0164] The first connecting section 2321 abuts against the first insulating member 25 , that is, the first connecting section 2321 is connected to a side of the second connecting portion 242 of the current collecting member 24 facing the first insulating member 25 , and abuts against the first insulating member 25 .

[0165] The battery cell 20 is also provided with a first insulating member 25, which is disposed between the wall portion 211 and the current collecting member 24 along the wall thickness direction X. The first insulating member 25 insulates and isolates the current collecting member 24 from the wall portion 211, thereby effectively reducing the risk of short circuits between the wall portion 211 and the current collecting member 24. Furthermore, by disposing the first connecting segment 2321 between the current collecting member 24 and the first insulating member 25, and by abutting the first connecting segment 2321 and the first insulating member 25, the first insulating member 25 not only insulates and isolates the tab 232 from the wall portion 211, but also facilitates better contact between the first connecting segment 2321 and the electrolyte between the current collecting member 24 and the first insulating member 25 when the battery cell 20 is inverted for use, facilitating the electrolyte's rise along the tab 232 and entry into the main body 231 of the electrode assembly 23.

[0166] According to some embodiments of the present application, referring to Figures 6 and 7, and further referring to Figure 11, Figure 11 is a cross-sectional view of the wall portion 211 of the housing 21 provided in some embodiments of the present application. Along the thickness direction X of the wall portion, a recess 2112 is provided on the side of the wall portion 211 facing the main body portion 231. The recess 2112 is used for at least a portion of the tab 232.

[0167] The recess 2112 is used to accommodate at least a portion of the tab 232. That is, the wall portion 211 is recessed on the side facing the main body 231 to form a groove to accommodate part or all of the tab 232. In Figure 7, part of the tab 232, the current collecting member 24, and the support frame 29 are all accommodated in the recess 2112.

[0168] By providing a recess 2112 on the side of the wall portion 211 facing the main body portion 231, components such as the tab 232 can be accommodated in the recess 2112 of the wall portion 211, thereby effectively saving the internal space of the battery cell 20, which is beneficial to improving the internal space utilization rate of the battery cell 20 and can provide a certain degree of protection for the tab 232.

[0169] In some embodiments, referring to Figures 6, 7, and 11, a convex portion 2113 is formed on the side of the wall portion 211 facing away from the main body portion 231 and at a position corresponding to the concave portion 2112 along the thickness direction X of the wall portion. In other words, the wall portion 211 is concave on the side facing the main body portion 231 and convex on the side facing away from the main body portion 231, so that the concave portion 2112 is formed on one side of the wall portion 211 and the convex portion 2113 is formed on the other side.

[0170] It should be noted that in other embodiments, the wall portion 211 may also be other structures. For example, the side of the wall portion 211 facing away from the main body portion 231 is entirely flat. That is, the wall portion 211 is a plate-like structure with the recess 2112 formed on only one side.

[0171] A convex portion 2113 is formed on the other side of the wall portion 211 corresponding to the position of the concave portion 2112. The wall portion 211 with this structure can be formed by stamping, which is beneficial to reducing the processing difficulty of the wall portion 211 and reducing the weight of the wall portion 211, thereby improving the energy density of the battery cell 20.

[0172] According to some embodiments of the present application, as shown in Figures 3 and 4 , the housing 21 includes a shell 212 and an end cap 213. The shell 212 defines an interior containing a cavity 2122 having an opening 2121, and the electrode assembly 23 is accommodated within the cavity 2122. The end cap 213 closes the opening 2121 and serves as a wall portion 211.

[0173] Among them, the end cover 213 is the wall portion 211, that is, the electrode terminal 22 is arranged on the end cover 213, and the pole ear 232 of the electrode assembly 23 is protruded on the end of the main body 231 facing the end cover 213, so that the collecting component 24 is arranged between the end cover 213 and the main body 231 of the electrode assembly 23 in the thickness direction X of the wall portion.

[0174] The wall portion 211 of the outer shell 21 is the end cover 213 of the outer shell 21 for closing the opening 2121 of the shell 212. The battery cell 20 with this structure is convenient for assembling the electrode terminal 22, and is conducive to reducing the difficulty of assembling the current collecting component 24 and the pole ear 232, thereby effectively improving the production efficiency of the battery cell 20.

[0175] It should be noted that the structure of the battery cell 20 is not limited to this. In some embodiments, the battery cell 20 can also have other structures. For example, the outer shell 21 includes a shell 212 and an end cap 213. The shell 212 includes an integrally formed side wall and wall portion 211. The side wall is arranged around the wall portion 211. Along the thickness direction X of the wall portion, one end of the side wall is connected to the wall portion 211, and the other end encloses an opening 2121. The side wall and the wall portion 211 jointly define a receiving cavity 2122 for accommodating the electrode assembly 23. The end cap 213 closes the opening 2121. In other words, the wall portion 211 is the bottom wall of the shell 212 disposed opposite the end cap 213 in the thickness direction X of the wall portion. That is, the electrode terminal 22 is disposed on the bottom wall of the shell 212 disposed opposite the end cap 213 in the thickness direction X of the wall portion.

[0176] The shell 212 includes an integrally formed side wall and wall portion 211 , that is, the shell 212 is made using an integral molding process, such as stamping, casting, or extrusion molding, etc., that is, the side wall and wall portion 211 of the shell 212 are an integral structure.

[0177] The wall portion 211 is a wall of the shell 212 that is arranged opposite to the end cover 213 in the thickness direction X of the wall portion. The battery cell 20 adopting this structure can keep the electrode terminal 22 and other components away from the end cover 213, and there is no direct connection between the wall portion 211 and the end cover 213, thereby alleviating the phenomenon that the force generated when the electrode terminal 22 and other components pull or twist the wall portion 211 acts on the end cover 213, thereby reducing the risk of connection failure between the end cover 213 and the shell 212, and further helping to further reduce the risk of leakage of the battery cell 20 during use.

[0178] According to some embodiments of the present application, the present application further provides a battery 100 comprising the battery cell 20 of any of the above solutions.

[0179] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 100 of any of the above solutions, and the battery 100 is used to provide electrical energy to the electrical device.

[0180] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0181] According to some embodiments of the present application, as shown in Figures 3 to 11, a battery cell 20 is provided. The battery cell 20 includes a housing 21, an electrode terminal 22, an electrode assembly 23, a current collecting member 24, a support frame 29, and a first insulating member 25. The housing 21 has a wall portion 211. The housing 21 includes a shell 212 and an end cap 213. The shell 212 defines an accommodating cavity 2122 with an opening 2121. The end cap 213 closes the opening 2121. The end cap 213 serves as the wall portion 211. The electrode terminal 22 is mounted on the wall portion 211. The electrode assembly 23 is accommodated in the accommodating cavity 2122 of the shell 212. The wall portion 211 is configured to support the electrode assembly 23. The electrode assembly 23 includes a main body 231 and a tab 232. The tab 232 is protruding from the end of the main body 231 facing the wall portion 211 along the thickness direction X of the wall portion. The current collecting member 24 is disposed between the wall portion 211 and the main body 231. It includes a first connecting portion 241 and a second connecting portion 242 that are interconnected. The first connecting portion 241 has a first surface 2411 facing the wall portion 211, and the second connecting portion 242 has a second surface 2421 facing the wall portion 211. The first surface 2411 is connected to the electrode terminal 22. The tab 232 includes a first connecting segment 2321, a second connecting segment 2322, and a third connecting segment 2323 that are sequentially connected. The first connecting segment 2321 is located on the side of the second connecting portion 242 facing the wall portion 211 and is welded to the second surface 2421. The second connecting portion 242 is located on a section of the current collecting member 24 in the first direction Y. The third connecting portion is located on the side of the current collecting member 24 facing the main body 231 and is connected to the main body 231. Along the wall thickness direction X, the projection of the first connecting segment 2321 does not overlap with the projection of the first connecting portion 241, and the first surface 2411 is closer to the main body 231 than the second surface 2421. Along the wall thickness direction X, the support frame 29 is disposed between the current collecting member 24 and the main body 231, and the projection of the support frame 29 does not overlap with the projection of the first connecting segment 2321. Along the wall thickness direction X, the first insulating member 25 is disposed between the wall 211 and the current collecting member 24, with the first connecting segment 2321 located between the current collecting member 24 and the first insulating member 25, and the first connecting segment 2321 abuts the first insulating member 25.

[0182] 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.

[0183] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery cell, comprising: a housing having a wall portion; an electrode terminal, disposed on the wall portion; an electrode assembly housed in the housing, the wall portion being configured to support the electrode assembly, the electrode assembly comprising a main body portion and a tab, the tab being protruding from one end of the main body portion facing the wall portion along a thickness direction of the wall portion; as well as a current collecting member disposed between the wall portion and the main body portion, the current collecting member connecting the electrode tab and the electrode terminal; Part of the electrode tab extends between the current collecting component and the wall portion along the thickness direction of the wall portion.

2. The battery cell according to claim 1, wherein: The tab comprises: The first connecting section is connected to the current collecting member and is located between the current collecting member and the wall portion along a thickness direction of the wall portion.

3. The battery cell according to claim 2, wherein: The first connecting section is connected to the current collecting component by welding.

4. The battery cell according to claim 2 or 3, wherein: The tab further includes a second connecting segment and a third connecting segment, wherein the first connecting segment, the second connecting segment and the third connecting segment are connected in sequence, and the third connecting segment is connected to the main body; Along the thickness direction of the wall portion, the first connecting section is located on a side of the current collecting member facing away from the main body portion, and the third connecting section is located on a side of the current collecting member facing the main body portion.

5. The battery cell according to claim 4, wherein: The second connecting section is located at one end of the current collecting member along a first direction, and the first direction is perpendicular to a thickness direction of the wall portion. The battery cell according to claim 5 , wherein: The battery cell comprises: The two electrode assemblies have their main bodies stacked along the first direction, and the second connecting sections of the tabs with the same polarity of the two electrode assemblies are respectively located at both ends of the current collecting component.

7. The battery cell according to any one of claims 2 to 6, wherein: The current collecting member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is connected to the electrode terminal, and the second connecting portion is connected to the first connecting section; Wherein, along the thickness direction of the wall portion, the first connecting section is located on a side of the second connecting portion away from the main body portion, and a projection of the first connecting section does not overlap with a projection of the first connecting portion.

8. The battery cell according to claim 7, wherein: Along the thickness direction of the wall portion, the first connecting portion has a first surface facing the wall portion, the second connecting portion has a second surface facing the wall portion, the first surface is connected to the electrode terminal, the second surface is connected to the first connecting section, and the first surface is closer to the main body portion than the second surface.

9. The battery cell according to any one of claims 2 to 8, wherein: The battery cell further comprises: A support frame is provided between the current collecting component and the main body along the thickness direction of the wall portion, and a projection of the support frame does not overlap with a projection of the first connecting section.

10. The battery cell according to claim 9, wherein: The battery cell comprises: The two electrode assemblies are stacked with the main bodies of the two electrode assemblies along a first direction perpendicular to the thickness direction of the wall portion; Wherein, along the first direction, the support frame is located between the tabs of the two electrode assemblies.

11. The battery cell according to any one of claims 2 to 10, wherein: The battery cell further comprises: a first insulating member, disposed between the wall portion and the current collecting member along a thickness direction of the wall portion to insulate and isolate the wall portion from the current collecting member; Wherein, along the thickness direction of the wall portion, the first connecting section is located between the current collecting component and the first insulating member, and the first connecting section abuts against the first insulating member.

12. The battery cell according to any one of claims 1 to 10, wherein: A recess is provided on a side of the wall portion facing the main body portion along a thickness direction of the wall portion, and the recess is used for at least a portion of the tab.

13. The battery cell according to claim 12, wherein: A convex portion is formed at a position of the wall portion corresponding to the concave portion on a side of the wall portion away from the main body portion along a thickness direction of the wall portion.

14. The battery cell according to any one of claims 1 to 13, wherein: The housing comprises: A housing having an opening formed therein, wherein the electrode assembly is accommodated in the housing; an end cap for closing the opening; Wherein, the end cover is the wall portion.

15. The battery cell according to any one of claims 1 to 13, wherein: The housing comprises: The housing includes an integrally formed sidewall and the wall portion, the sidewall being disposed around the wall portion, one end of the sidewall being connected to the wall portion along the thickness direction of the wall portion, and the other end of the sidewall being enclosed to form an opening, the sidewall and the wall portion jointly defining a housing cavity for accommodating the electrode assembly; An end cap closes the opening.

16. A battery comprising the battery cell according to any one of claims 1 to 15.

17. An electrical device comprising the battery according to claim 16.

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