Battery cell, battery and power-consuming device

Abstract

Battery cell (40) comprising: an electrode arrangement (10) comprising several electrode foils (10a, 10b) and a separator (10c) located between adjacent electrode foils (10a, 10b) of opposite polarity in the several electrode foils (10a, 10b), wherein the several electrode foils (10a, 10b) and the separator (10c) are wound along a winding direction (wd) and form a wound structure (100); wherein at least one of the several electrode foils (10a, 10b) comprises a collector substrate (11) and several electrode tabs (13), wherein the several electrode tabs (13) are connected to at least one lateral edge of the collector substrate (11) extending along the winding direction (wd) and are spaced apart along the winding direction (wd);wherein at least a portion of the multiple electrode tabs (13) is bent in a direction facing a winding shaft (CL) of the wound structure (100) and forms a tab stack structure (130) at an end section of the wound structure (100); an outer housing (4A) having a chamber that accommodates the electrode arrangement (10); an electrode clamp (42) provided on a wall section of the outer housing (4A); and a conductive element (21, 22) welded to the tab stack structure (130) and electrically connected to the electrode clamp (42).

Description

Technical field The present application relates to the technical field of batteries, in particular a battery cell, a battery and a power-consuming device. State of the art Secondary batteries, especially lithium-ion batteries, offer advantages such as high voltage, high specific energy, long cycle life, environmentally friendly operation, a wide operating temperature range, and low self-discharge. They are widely used in portable electronic devices and large new-energy electric vehicles and are of great importance in addressing pollution and the energy crisis. With the increasing prevalence of lithium-ion batteries, their operational safety has become a major concern for users. Registration content A first aspect of the present application provides a battery cell comprising the following: an electrode arrangement comprising several electrode foils and a separator provided between adjacent electrode foils of opposite polarity in the several electrode foils, wherein the several electrode foils and the separator are wound along a winding direction and form a wound structure; wherein at least one of the several electrode foils comprises a collector substrate and several electrode tabs, wherein the several electrode tabs are connected to at least one lateral edge of the collector substrate extending along the winding direction and are spaced apart along the winding direction; wherein at least a portion of the several electrode tabs is bent in a direction facing a winding shaft of the wound structure and forms a tab stack structure at an end section of the wound structure;an outer housing comprising a chamber that accommodates the electrode assembly; an electrode clamp provided on a wall section of the outer housing; and a conductive element welded to the tab stack structure and electrically connected to the electrode clamp. The conductive element is electrically connected to an electrode clamp located on a wall section of the outer casing and welded to several electrode tabs stacked at an end section of the coiled electrode assembly. This stacked, multi-layered tab structure has a greater thickness, making it difficult to weld through when connected to the conductive element. This prevents the risk of scalding the separator structure, electrode foils, or other components within the electrode assembly, which could lead to a short circuit or similar issue during welding. This reduces the risk of a short circuit in the battery cell while simultaneously improving the weld quality and operational safety. In some embodiments, the tab stack structure comprises a first tab stack region and a second tab stack region arranged in an outside-to-inside row along the direction facing the winding shaft, wherein the number of tab stack layers of the first tab stack region increases along the direction facing the winding shaft; wherein the number of tab stack layers of the second tab stack region is the same in the direction facing the winding shaft, and wherein the conductive element and at least part of a welded area of ​​the tab stack structure are located in the second tab stack region. The number of tab stack layers in the second tab stack area is the same in the direction facing the winding shaft. Therefore, when welding the conductive element to the tab stack structure formed at the end of the wound structure, the second tab stack area has a higher number of tab stack layers and a greater stack thickness compared to the other tab stack areas, making it less susceptible to weld penetration when welded to the conductive element. This improves the weld quality in the weld area and reduces the risk of short circuits due to burns on the separator or electrode foils during welding. In some embodiments, the welding area comprises a first section located in the second tab stack area and a second section located in the first tab stack area. The second tab stack area and the first tab stack area are each welded to the conductive element via the first section and the second section of the weld area, thereby increasing the overall size of the weld area, increasing the strength of the weld and reducing the resistance of the weld area, thus reducing the risk of overcurrent. In some embodiments, the tab stack structure further comprises a third tab stack area located on one side of the second tab stack area facing the winding shaft, wherein the welding area further comprises a third section located in the third tab stack area. The third tab stack area is welded to the conductive element, which increases the overall size of the weld area, thereby increasing the strength of the weld and reducing the resistance of the weld area, thus reducing the risk of overcurrent. In some embodiments, a ratio S1 / S of an area S1 of the first section to an area S of the welding area satisfies the following: S1 / S ≥ 70%. The S1 / S ratio is greater than or equal to 70%, which improves the quality of the weld in the welding area and reduces the risk of through-welding or cold welding of the electrode tabs. In some embodiments, a ratio S1 / S of an area S1 of the first section to an area S of the welding area satisfies the following: S1 / S ≥ 90%. Furthermore, the S1 / S ratio is greater than or equal to 90%, which improves the quality of the weld in the welding area and effectively reduces the risk of through-welding or cold welding of the electrode tabs. In some embodiments, the wound structure is a cylindrical wound structure; wherein a ratio L1 / L of a maximum radial length L1 of the first section in a radial direction of the cylindrical wound structure to a maximum radial length L of the weld area in the radial direction of the cylindrical wound structure satisfies the following: L1 / L ≥ 70%. The L1 / L ratio is greater than or equal to 70%, which improves the quality of the weld in the welding area and reduces the risk of through-welding or cold welding of the electrode tabs. In some embodiments, the ratio L1 / L of the maximum radial length L1 of the first section in the radial direction of the cylindrically wound structure to the maximum radial length L of the weld area in the radial direction of the cylindrically wound structure is as follows: L1 / L ≥ 90%. Furthermore, the L1 / L ratio is greater than or equal to 90%, which improves the quality of the weld in the welding area and effectively reduces the risk of through-welding or cold welding of the electrode tabs. In some embodiments, a minimum distance d between a winding start end of the collector substrate in the winding direction and the second electrode tab satisfies the following: d ≤ 1200 mm; where the second electrode tab is defined as one of the several electrode tabs that is welded to the conductive element and is closest to the winding start end (WS). The minimum distance d is less than or equal to 1200 mm, which increases the reach of the electrode tabs directly connected to the conductive element through the welding area, reduces the risk of overcurrent in the second electrode tab and thus minimizes the risk of overheating of the electrode tabs, which could impair the performance of the chemical substances within the electrode arrangement. In some embodiments, the minimum distance d satisfies the following: d ≤ 800 mm; Furthermore, the minimum distance d is less than or equal to 800 mm, which significantly increases the reach of the electrode tabs directly connected to the conductive element through the welding area, further reduces the risk of overcurrent in the first electrode tab, and thus effectively minimizes the risk of overheating of the electrode tabs, which could impair the performance of the chemical substances within the electrode arrangement. In some embodiments, a maximum value Hmax of a depth H of the weld area of ​​the conductive element and the tab stack structure in an extension direction of the winding shaft and a thickness t of the conductive element fulfill the following: By adjusting the ratio between the maximum value Hmax of the depth of the welding area and the thickness t of the conductive element within a certain range, the risk of perforation and cold welds of the electrode tabs can be minimized. In some embodiments, the maximum value Hmax of the depth H of the welding area and the thickness t of the conductive element in the extension direction of the winding shaft satisfy the following: 1.6*t ≤ Hmax ≤ 1.8*t. By further adjusting the ratio between the maximum value Hmax of the depth of the welding area and the thickness t of the conductive element within an optional range, the risk of perforation and cold welding of the electrode tabs can be effectively minimized. In some embodiments, a minimum value Hmin of the depth H of the weld area of ​​the conductive element and the tab stack structure in the extension direction of the winding shaft and the thickness t of the conductive element satisfy the following: 1.1*t ≤ Hmin ≤ 1.5*t. By adjusting the ratio between the minimum value Hmin of the depth of the welding area and the thickness t of the conductive element within a certain range, the risk of through-welding and cold welds can be minimized. In some embodiments, the minimum value Hmin of the depth H of the welding area and the thickness t of the conductive element in the extension direction of the winding shaft satisfy the following: 1.2*t ≤ Hmin ≤ 1.4*t. By further adjusting the ratio between the minimum value Hmin of the depth of the welding area and the thickness t of the conductive element within an optional range, the risk of perforation and cold welding of the electrode tabs can be effectively minimized. In some embodiments, a difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the weld area of ​​the conductive element and the tab stack structure in the extension direction of the winding shaft and the thickness t of the conductive element satisfy the following: 0.2*t ≤ (Hmax-Hmin) ≤ 0.8*t. By adjusting the ratio between the difference (Hmax-Hmin) and the thickness t of the conductive element within a specific range, the risk of local perforation or cold welds can be minimized. In some embodiments, the difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the welding area and the thickness t of the conductive element in the extension direction of the winding shaft satisfy the following: 0.3*t ≤ (Hmax-Hmin) ≤ 0.6*t. By further adjusting the ratio between the difference (Hmax-Hmin) and the thickness t within an optional range, the risk of perforation and cold welding of the electrode tabs can be further minimized. In some embodiments, an upper distance e between adjacent electrode tabs in the multiple electrode tabs in the winding direction (wd) satisfies the following: e ≤ 0.5 mm. The upper distance e between the adjacent electrode tabs is less than or equal to 0.5 mm, which allows the degree of tab stacking to be increased, resulting in a greater tab stack thickness and a lower risk of electrode tab penetration. In some embodiments, an upper distance e between adjacent electrode tabs in the multiple electrode tabs in the winding direction (wd) satisfies the following: e ≤ 0.2 mm. Furthermore, the upper distance e between the electrode tabs is less than or equal to 0.2 mm, which effectively results in a greater tab stack thickness and a lower risk of the electrode tabs being welded through. In some embodiments, the weld area of ​​the conductive element and the tab stack structure comprises a first section located in the second tab stack area; wherein the depth of the first section increases in the extension direction of the winding shaft in the direction facing the winding shaft. As the film winding layer bends closer to the winding shaft, more electrode tabs are connected and stacked, so that the tab stack thickness gradually increases from the outside in. This allows the welding power to also gradually increase from the outside in, creating a weld zone whose depth increases from the outside in, thus improving the weld quality within that zone. In some embodiments, the weld area of ​​the conductive element and the tab stack structure comprises a first section located in the second tab stack area and a second section located in the first tab stack area; wherein the depth of the first section is less than the depth of the second section in the extension direction of the winding shaft. Given that the first tab stack area has fewer tab stack layers and a relatively shallow weld pool depth without perforation, it is possible to reduce the welding power used for welding in the first tab stack area compared to the welding power used for welding in the second tab stack area. This will improve the weld quality in the second section of the first tab stack area and reduce the risk of electrode perforation. In some embodiments, at least some of the multiple electrode tabs have a rectangular or parallelogram shape. It is assumed that rectangular or parallelogram-shaped electrode tabs allow for a smaller upper distance between the electrode tabs, which enables stronger interlocking of adjacent electrode tabs, thereby increasing the tab stack thickness and reducing the risk of electrode tab welding through. In some embodiments, the wound structure is a cylindrical wound structure, wherein the cylindrical wound structure has a central hole, wherein a minimum distance r1 between the winding shaft and a tab root of the first electrode tab and the winding shaft satisfies the following: where h0 is a height of the first electrode tab in an undistorted state in the extension direction of the winding shaft, where R is a radius of a hole section of the central hole at the end section of the wound structure. The minimum distance r1 is greater than or equal to the sum of the height h0 of the first electrode tab and 0.8 times the radius R of the central hole. This corresponds to the first electrode tab, which is closest to the winding shaft, covering no more than 20% of the radius of the central hole after being bent from the outside in. This is to reduce blockage of the central hole by bending the electrode tabs, to avoid interfering with the injection of the electrolyte solution, and to reduce the risk of a short circuit caused by the electrode tabs being pushed downwards or tearing during electrolyte injection. In some embodiments, a minimum distance r1 between the winding shaft and the tab root of the first electrode tab satisfies the following: r1 ≥ h0+R. The minimum distance r1 is greater than or equal to the sum of the height h0 of the first electrode tab and the radius R of the central hole, which means that the first electrode tab closest to the winding shaft does not cover the central hole after bending from the outside in, thus more efficiently avoiding the influence of electrolyte solution injection due to the electrode tab covering the central hole. In some embodiments, the multiple electrode tabs comprise a first tab group and a second tab group, wherein multiple foil winding circles in which the first tab group is located are arranged on an outside of at least one foil winding circle in which the second tab group is located; wherein, in the extension direction of the winding shaft, a minimum height h1 of the first tab group in the unstuck state is greater than a maximum height h2 of the second tab group in the unstuck state. The maximum height h2 of the second tab group, located on the inside of the first tab group, is less than the minimum height h1 of the first tab group. This allows the first electrode tab, which is connected to the welding area, to be positioned closer to the beginning of the winding, thus reducing the risk of overcurrent on the first electrode tab. Furthermore, the reduced height of the electrode tab in the first tab group can minimize or eliminate coverage of the central hole, effectively preventing electrolyte injection due to the electrode tab obscuring the central hole. In some embodiments, the second tab group comprises the first electrode tab, wherein the height h2 of the second tab group decreases in the direction facing the winding shaft (CL) in the extension direction of the winding shaft (CL) in the undistorted state. The decreasing height of each winding of the electrode tabs of the first tab group, from the outside to the inside, allows the second tab stack area to extend further in the direction of the winding shaft, thereby increasing the size of the second tab stack area, which in turn allows an increase in the size of the welding area in the first section of the second tab stack area, improves the quality of the weld in the welding area and reduces the risk of through-welding or cold welds of the electrode tabs. In some embodiments, the outer housing comprises a housing body and an end cap, wherein one end of the housing body has an opening, the end cap covering the opening, the housing body comprising a side wall and a bottom wall; wherein the side wall surrounds an outside of the electrode arrangement, the bottom wall being opposite the opening, and a wall section of the outer housing being either the end cap or the bottom wall. The conductive element is electrically connected to an electrode clamp located on the bottom wall of the end cap or housing body and welded to the tab stack structure of the electrode assembly. This reduces the risk of a short circuit in the battery cell and increases operational reliability, while simultaneously improving the weld quality in the welded area. Another aspect of the present application provides a battery comprising the above-mentioned battery cell. The battery in which the above-mentioned battery cells are used can effectively increase operational reliability. Another aspect of the present application provides a power-consuming device comprising the above-mentioned battery. The power-consuming device, in which the above-mentioned battery cells are used, can effectively increase operational reliability. Brief description of the drawings To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings, which are to be used in the embodiments of the present application, are briefly described below. Of course, the accompanying drawings described below are only some of the embodiments of the present application, and other accompanying drawings can be derived from the accompanying drawings by a person with normal technical knowledge without any creative effort. The present application will be more clearly understood by reference to the accompanying drawings in accordance with the following detailed description, including: Fig. 1 is a schematic representation of the structure of a power-consuming device according to some embodiments of the present application; Fig. 2 is a schematic dissection of a battery according to some embodiments of the present application; Fig. 3 is a schematic representation of the connection of several battery cells in the battery according to some embodiments of the present application; Fig. 4A is a schematic dissection of the battery cell according to some embodiments of the present application; Fig. 4B is a schematic representation of a longitudinal section through a winding shaft in the battery cell according to some embodiments of the present application; Fig.Figure 4C is a schematic disassembled view of an electrode arrangement and a conductive element in the battery cell according to some embodiments of the present application; Figure 5 is a schematic cross-section of a wound structure according to some embodiments of the battery cell of the present application; Figure 6 is a schematic view of the electrode foil and the electrode tab in an unfolded state according to some embodiments of the battery cell of the present application; Figure 7 is a schematic cross-section of a structure according to some embodiments of the battery cell of the present application in which the electrode tabs are welded to the conductive element; Figure 8 is a schematic section of a plurality of tab stack regions of a tab stack structure according to some embodiments of the battery cell of the present application; FigureFigure 9 is a schematic representation of the distribution of the weld area in the plurality of tab stack areas of the tab stack structure according to some embodiments of the battery cell of the present application; Figure 10 is a schematic representation of the sizes of the different sections of the weld area according to some embodiments of the battery cell of the present application; Figure 11 is a schematic representation of the overlapping of adjacent electrode tabs in different tab stack areas according to some embodiments of the battery cell of the present application; Figures 12 and 13 are schematic representations of the size ratios of different shapes of electrode tabs connected to an electrode foil according to some embodiments of the battery cell of the present application; FigureFigure 14 is a schematic representation of the size of the bent electrode tabs and the central hole according to some embodiments of the battery cell of the present application; Figure 15 is a schematic representation of the height of the electrode tab in an undistorted state according to some other embodiments of the battery cell of the present application; Figure 16 is a schematic representation of a section of the plurality of tab stack areas after the electrode tabs of Figure 15 have been bent in one direction towards the side of the central hole. It should be clear that the sizes of the various parts shown in the accompanying drawings are not drawn in actual proportional proportions. Furthermore, identical or similar reference numerals indicate identical or similar components. Reference symbol list: 10-electrode assembly; 10a-first electrode foil; 10b-second electrode foil; 10c-separator; 100-wound structure; 110-central hole; 11-collector substrate; 12-active material layer; 13-electrode tab; 130-tab stack structure; 130a-first tab stack area; 130b-second tab stack area; 130c-third tab stack area; 131-first electrode tab; 132-second electrode tab; 13a-first tab group; 13b-second tab group; 21, 22-conductive element; 30-weld area; 31-first section; 32-second section; 33-third section; 40-battery cell; 4A-outer casing; 41-case body; 411-Opening; 412-Through hole; 42-End cap; 421-Pressure relief component; 43-Electrode terminal; 44-Insulating element; 45-Electrode exit section; 46-Busbar; 50-Battery; 51-Box; 52-Cover; 60-Vehicle; wd-Winding direction; CL-Winding shaft; WS-Winding start end. Description of the embodiments The specific embodiments of the present application are described in more detail below in conjunction with the accompanying drawings and exemplary embodiments. The detailed description of the following exemplary embodiments and the accompanying drawings serve to illustrate the principles of the present application by way of example, but cannot be used to limit the scope of the present application; that is, the present application is not limited to the described exemplary embodiments. In the description of this application, it should be understood that, unless otherwise stated, "several" means more than two, and that terms such as "top," "bottom," "left," "right," "inside," and "outside," which indicate orientation or positional relationship, are used only for the sake of simplicity and to simplify the description of this application and do not indicate or imply that the device or element referred to must have a particular orientation or be designed and operated in a particular orientation, and are therefore not to be understood as limiting the present application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and are not to be understood as indicating or implying a relative meaning. "Perpendicular" is not strictly perpendicular, but within the tolerance of error."Parallel" is not strictly perpendicular, but within the error tolerance. The orientations appearing in the following description refer to the directions shown in the drawings and are not intended to restrict the specific structure of the present application. In the description of the present application, it should be noted that the terms, e.g., "mounted," "connected," "fastened," unless expressly stated otherwise and limited, are to be understood broadly, e.g., as either a permanent connection, a detachable connection, or a connection in one piece; a direct connection or an indirect connection via an intermediate medium. The specific meaning of the above-mentioned terms in the present application is clear to a person competent in the field. The embodiments of the present application are described in more detail below with reference to the accompanying drawings. It should also be noted that the features of the following embodiments can be combined with one another, provided there is no contradiction. The term “plurality”, as used in the present application, refers to more than two (including two). In the embodiments of the present application, the battery cell can be a secondary battery, i.e., a battery cell that can be recharged after the battery cell has been discharged, so that the active material can be activated and used again. The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery and the like, but in the embodiments of the present application it is not limited to these. A battery cell generally comprises an electrode array. The electrode array includes several electrode foils and a separator located between adjacent electrode foils. The multiple electrode foils may include a cathode foil and an anode foil with opposite polarity. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are embedded and unembedded between the cathode foil and the anode foil. The separator is located between the cathode foil and the anode foil and serves to prevent a short circuit between the cathode and the anode while allowing the passage of active ions. In some embodiments, the cathode foil may comprise a cathode collector substrate and an active cathode material layer provided on at least one surface of the cathode collector substrate. For example, the cathode collector substrate has two surfaces that are opposite each other in its thickness direction, and the active cathode material is provided on one or both of the two surfaces opposite the cathode collector substrate. For example, the cathode collector substrate can be a metal foil or a composite collector. The metal foil can be made of aluminum or stainless steel with a silver coating, stainless steel, copper, aluminum, nickel, or electrodes made of charcoal concentrate, carbon, nickel, or titanium. The composite collector can consist of a base layer of polymeric material and a metal layer. The composite collector can be formed by depositing metallic material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) onto a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). For example, the active cathode material layer can comprise at least one lithium-containing phosphate, lithium transition metal oxide, and corresponding modified compounds thereof. However, the present application is not limited to these materials, and other conventional materials suitable for use as the active cathode material layer in batteries can also be employed. It is possible to use only one of these active cathode material layers or to use more than two in combination. Examples of lithium-containing phosphates include lithium iron phosphate (e.g., LiFePO4, which can also be abbreviated as LFP), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., LiMnPO4), a composite of lithium manganese phosphate and carbon, a composite of lithium ferromanganese phosphate, and lithium manganese iron phosphate and carbon.Layered transition metal oxides include, for example, at least one of the following compounds: lithium cobalt oxide (e.g., LiCoO2), lithium nickel oxide (e.g., LiNiO2), lithium manganese oxide (e.g., LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., LiNi1 / 3Co1 / 3Mn1 / 3O2 (which can also be abbreviated as NCM333), LiNi0,5Co0,2Mn0,3O2 (which can also be abbreviated as NCM523), LiNi0,5Co0,25Mn0,25O2 (which can also be abbreviated as NCM211), LiNi0,6Co0,2Mn0,2O2 (also known as NCM622), LiNi0,8Co0,1Mn0,1O2 (also known as NCM811) and lithium nickel cobalt aluminum oxide (e.g. LiNi0,85Co0,15Al0,05O2) and modified compounds thereof and the like. In some embodiments, the anode foil may comprise an anode collector substrate. For example, the anode collector substrate can be a metal foil, a foam metal, or a composite collector. The metal foil can be made of aluminum or stainless steel with a silver coating, stainless steel, copper, aluminum, nickel, or electrodes made of charcoal concentrate, carbon, nickel, or titanium. The foam metal can be nickel foam, copper foam, aluminum foam, a foam alloy, or carbon foam. The composite collector can consist of a polymer base layer and a metal layer. A composite collector can be formed by depositing metallic material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) onto a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). For example, the anode foil can comprise an anode collector substrate and an active anode material layer provided on at least one surface of the anode collector substrate. For example, the anode collector substrate has two surfaces that are opposite each other in its thickness direction, and the active anode material layer is provided on one or both of the two surfaces opposite the anode collector substrate. For example, the active anode material layer can be an active anode material layer for the battery cell that is known in the art for use in [the relevant technology]. The active anode material layer can, for example, comprise at least one of the following materials: synthetic graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, and lithium titanate. The silicon-based material can be at least one of monolithic silicon, silicon oxides, silicon-carbon complexes, silicon-nitrogen complexes, and silicon alloys. The tin-based material can be at least one of monolithic tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as the active anode material layer in batteries can also be used.It is possible that only one of these active anode material layers is used, or that more than two are used in combination. In some embodiments, the material of the cathode collector substrate can be aluminum and the material of the anode collector substrate can be copper. In some embodiments, the electrode arrangement may include a separator, wherein the separator is provided between the cathode and the anode. In some embodiments, the separator is an insulating film. The present application does not impose any specific restrictions regarding the type of insulating film, and any known insulating film with a porous structure and good chemical and mechanical stability can be selected. For example, the main material of the insulating film can be at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The insulating film can be designed as a single-layer film or as a multi-layer composite film without restriction. If the insulating film is a multi-layer composite film, the materials of the layers can be the same or different without any particular restriction. The separator can be a separate component located between the cathode film and the anode film, or it can be attached to the surface of the cathode film and / or the surface of the anode film. In some embodiments, the separator is a solid electrolyte. The solid electrolyte is located between the cathode foil and the anode foil and serves both for ion transfer and insulation between the cathode and the anode. In some embodiments, the battery cell further comprises an electrolyte that serves for ion transfer between the cathode and the anode. The present application does not impose any specific restrictions regarding the type of electrolyte, which can be selected as required. The electrolyte can be in liquid, gel, or solid form. For example, the liquid electrolyte can include an electrolyte salt and a solvent. In some embodiments, the electrolyte salt may be at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(trifluorosulfonyl)amide, lithium bis(trifluoromethanesulfonyl)amide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalic acid borate, lithium di(oxalic acid)borate, lithium difluorodioxygenophosphate and lithium tetrafluorooxalic acid phosphate. In some embodiments, the solvent may be at least one of ethylidene carbonate, propylidene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylenepropyl carbonate, ethylenepropyl carbonate, butylidene carbonate, ethylidene fluorocarbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclobutane sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be selected as an ether solvent. The ether solvent may comprise one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether. The gel electrolyte, for example, comprises a backbone network with a polymer as the electrolyte, paired with an ionic liquid lithium salt. The solid electrolyte includes, for example, a polymeric solid electrolyte, an inorganic solid electrolyte, and a compound solid electrolyte. The polymeric solid electrolyte can be, for example, a polyether (polyethylene oxide), a polysiloxane, a polycarbonate, a polyacrylonitrile, a polyvinylidene fluoride, a polymethyl methacrylate, a mono-ionic polymer, a polyionic liquid lithium salt, cellulose, and the like. The inorganic solid electrolyte can be, for example, one or more oxide solid electrolytes (crystalline chalcocite, superconducting sodium ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline superconducting lithium ion conductor (lithium perovskite, silver sulfide perovskite), amorphous sulfide) and one or more halide solid electrolytes, nitride solid electrolytes and hydride solid electrolytes. The compound solid electrolyte is formed, for example, by adding an inorganic solid electrolyte filler to the solid polymer electrolyte. In some embodiments, the electrode arrangement has a wound structure. The cathode foil, the anode foil and the separator are wrapped in the wound structure. For example, one or more cathode foils and one or more anode foils can be provided separately, and multiple cathode foils and multiple anode foils can be provided in alternating layers. For example, a large number of cathode foils can be provided, the anode foils are folded to form a large number of folded segments arranged in a cascade, and a cathode foil is clamped between adjacent folded segments. For example, both the cathode foils and the anode foils are folded to form a multitude of folded segments arranged in a cascade. The separators can, for example, be arranged in multiples between adjacent cathode foils and anode foils. For example, the separators can be arranged continuously between adjacent cathode foils and anode foils by folding or winding. In some embodiments, the electrode arrangement can have a cylindrical, flat or polygonal shape, etc. In some embodiments, the electrode assembly includes electrode tabs, and the tabs can conduct current away from the electrode assembly. The electrode tabs comprise a cathode tab and an anode tab, respectively, which are connected to the cathode collector substrate and the anode collector substrate. The electrode tab can be formed by cutting or trimming the collector substrate or connected by welding to a lateral edge of the collector substrate. In some embodiments, the battery cell may include an outer casing. The outer casing can be used to encapsulate components such as the electrode assembly and the electrolyte. The casing may be made of steel, aluminum, plastic (e.g., polypropylene), composite metal (e.g., copper-aluminum composite casing), or aluminum-plastic foil. The battery cell can be, for example, a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes, and the prismatic battery cell includes a battery cell with a square casing, a battery cell in the shape of a razor blade, a multi-prismatic battery, a multi-prismatic battery, for example a hexapod battery, etc., with no particular restrictions in the present application. The batteries mentioned in the embodiments of the present application may comprise one or more battery cells in order to achieve a higher voltage and capacity. In some embodiments, the battery can be a battery module; in the case of multiple batteries, the multiple battery cells are arranged and secured to form a battery module. The battery module can comprise multiple battery cells connected in series, parallel, or a combination thereof. In some embodiments, the battery can be a battery pack comprising a box and a battery cell, with the battery cell or battery module being contained in the box. In some embodiments, the box can be part of the vehicle's chassis structure. For example, parts of the box can be at least part of the vehicle's floor, or parts of the box can be at least part of a cross member and a longitudinal member of the vehicle. In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, and the like. In some prior art battery cells, if the electrode tab at the end section of the electrode assembly is welded to the current collection discs, there is a possibility that quality problems may occur during welding, such as through welding or cold welds, which impairs the operational safety of the battery. Against this background, the embodiments of the present application provide a battery cell, a battery and a power-consuming device that can improve the operational reliability of the battery. The battery cell of the embodiments of the present application can be used for various types of batteries. The battery can comprise a case and a battery module, wherein the case is used to hold the battery module and the battery module is installed in the case. The case can be made of metal. The battery module can comprise several battery cells connected in series, parallel, or a mixture. The battery cells can be the smallest units of the battery. The battery cell contains an electrode arrangement capable of undergoing an electrochemical reaction. The batteries of the embodiments of the present application can be used for various types of power-consuming devices that use batteries. Power-consuming devices can be mobile phones, portable devices, laptops, battery-powered vehicles, electric cars, boats, spacecraft, electric toys, and power tools, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, e.g., game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Power tools include power tools for metal cutting, grinding tools, power tools for assembly, and power tools for railways, such as...Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned power-consuming device. Batteries can be used to supply power-consuming devices such as vehicles, for example, to provide the vehicle with energy for steering or propulsion. Fig. 1 is a schematic representation of the structure of a power-consuming device according to some embodiments of the present application. For the sake of simplicity, the example of a vehicle is used as the power-consuming device. The vehicle 60 can be a fuel oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, and the like. The battery 50 can, for example, be provided on the underside of the vehicle 60 or on the front or rear of the vehicle. Battery 50 can be used to power vehicle 60; for example, battery 50 can be used as an operating power source for vehicle 60 within its electrical system. It serves, for instance, to meet the electrical needs of vehicle 60 for starting, navigation, and other functions during operation. Battery 50 can also be used as a propulsion energy source for vehicle 60, either as a replacement for or partially replacing heating oil or natural gas. The interior of vehicle 60 can also be equipped with an axle, wheels, a motor, and a control unit that manages the motor's power supply from battery 50, for example, for use in cases where vehicle 60 is powered by battery 50 as the drive energy source, with battery 50 replacing or partially replacing heating oil or natural gas to provide the necessary energy for the motor to maintain a constant speed and accelerate the vehicle. The motor is used to drive the axle to turn the wheels. Fig. 2 is a schematic disassembly of a battery according to some embodiments of the present application. Fig. 3 is a schematic representation of the connection of several battery cells in the battery according to some embodiments of the present application. Referring to Fig. 2, in some embodiments the battery 50 comprises a box 51, a lid 52 covering one open side of the box 51, and one or more battery cells 40 provided within the box 51. The box 51 and the lid 52 provide a receiving space for the battery cell 40 and ensure cooling, sealing, and impact protection. They also prevent adverse effects of liquid or other foreign matter on the charging, discharging, or safety of the battery cell. The box 51 and the lid 52 can have various shapes, such as rectangular, cylindrical, and the like. The box 51 can be a hollow structure open on one side, and the lid 52 is a plate-like structure. The lid 52 covers the open side of the box 51, thus creating an internal receiving space. In another embodiment, the box 51 has a structure open on one side, the lid 52 also has a structure open on one side, and the open side of the lid 52 covers the open side of the box 51, thereby forming the internal receiving space. As shown in Figures 2 and 3, the individual battery cells 40 are electrically connected to one another, e.g., in series, parallel, or a mixed configuration, to achieve the desired electrical performance parameters of the battery 50. A mixed configuration means that the multiple battery cells 40 are connected in series and parallel. Adjacent battery cells 40 can be electrically connected to one another via a busbar 44. The multiple battery cells 40 are arranged in series, and one or more series of battery cells 40 can be arranged in the housing as required. In some embodiments, each battery cell 40 of the battery 50 can be arranged along at least one longitudinal and one lateral direction of the housing. Depending on requirements, at least one or more rows or columns of battery cells 40 can be provided. Depending on requirements, one or more layers of battery cells 40 can also be provided in the vertical direction of the battery 50. In some embodiments, the multiple battery cells 40 can first be connected in series or parallel or mixed to form a battery module, and then the multiple battery modules are connected in series or parallel or mixed to form a whole and are included in the box 51. In other embodiments, all battery cells 40 are directly connected in series or parallel or mixed, and then the entire assembly of all battery cells 40 is included in the box. Fig. 4A is a schematic disassembled view of the battery cell according to some embodiments of the present application. Fig. 4B is a schematic longitudinal section through a winding shaft in the battery cell according to some embodiments of the present application. Fig. 4C is a schematic disassembled view of an electrode arrangement and a conductive element in the battery cell according to some embodiments of the present application. Fig. 5 is a schematic cross-section of a wound structure according to some embodiments of the battery cell of the present application. As shown in Figures 3, 4 to 5, the battery cell 40 in some embodiments comprises an electrode assembly 10, an outer casing 4A, an electrode clamp 42, and conductive elements 21, 22. The electrode assembly 10 comprises several electrode foils 10a, 10b and a separator 10c, which is arranged between adjacent electrode foils 10a, 10b with opposite polarity in the electrode foils 10a, 10b. The several electrode foils 10a, 10b and the separator 10c are wound along a winding direction wd and form a wound structure 100. In Fig. 5, the multiple electrode foils can comprise an electrode foil 10a as the cathode foil and an electrode foil 10b as the anode foil, wherein the electrode foils 10a and 10b alternate at least partially from the outside to the inside of the foil winding circuit formed in the wound structure 100. The separator 10c can be arranged between the electrode foil 10a and the electrode foil 10b in the form of an insulating film. In some other embodiments, the electrode foil 10a can also function as the anode foil and the electrode foil 10b as the cathode foil. In Figures 4A and 4B, the outer housing 4A has a chamber in which the electrode assembly 10 is received. Electrode terminals 42 are provided on the wall section of the outer housing 4A and are electrically connected to the conductive element 21. The electrode terminals 42 can be located on a side wall or a bottom wall of the outer housing 4A. The cavity of the outer casing 4A receives the electrolyte solution and holds the electrode arrangement 10. The shape of the outer casing 4A can be based on the shape of the electrode arrangement 10 received in the cavity; for example, the outer casing 4A can have the shape of a hollow rectangle, a hollow square, or a hollow cylinder. The outer casing 4A consists of a casing body 41 and an end cap 42. The casing body 41 is a hollow structure provided with openings 411 at one or both ends and can be made of one or more materials such as copper, iron, aluminum, steel, an aluminum alloy, plastic, and the like. The end cap 42 can be made of metal or non-metal and can be firmly connected to the casing body 41 by welding, gluing, or fastening. In Fig. 4B, one end of the housing body 41 is provided with an opening 411, and the end cap 42 covers the opening 411. The housing body 41 comprises a side wall 414 and a bottom wall 413. The side wall 414 surrounds the outside of the electrode assembly 10, and the bottom wall 413 is located opposite the opening 411. The wall section of the outer housing 4A is either the end cap 42 or the bottom wall 413, and accordingly, the electrode clamps 42 can be located on the end cap 42 or on the bottom wall 413. In the cylindrical battery cell, the housing body 41 can be a cylindrical, hollow structure with an opening 411 at one end, and the end cap 42 can be a disc-shaped structure that fits the opening 411. The electrode terminals 42 can be provided on the bottom wall 413 on one side of the housing body 41 facing away from the end cap 42. In Fig. 4A and Fig. 4B, the bottom wall 413 is provided with a through-hole 412 through which the electrode terminal 42 can be provided via an electrode exit section 45 and an insulating element 42. The electrode exit section 45 can project at least partially from an outer surface of the bottom wall 413 to facilitate the electrical connection between different battery cells 40 via the busbar 46. The insulating element 42 serves to provide insulation between the electrode exit section 45 and the housing body 41 and can be made of rubber or plastic.Optionally, openings are provided at both ends of the housing body, which are covered with end caps, and the electrode exit section and the electrode clamps can be provided on the end cap. As shown in Fig. 4A, a pressure relief component 421 can be provided at the end cap 42. The pressure relief component is an element or component that serves to actuate the battery cell to relieve the internal pressure or temperature when the internal pressure or temperature reaches a predetermined threshold. The threshold determination varies depending on the design requirements. The threshold may depend on the material of one or more of the cathode foils, the anode foils, the electrolyte solution, and the insulating film in the battery cell. The pressure relief component may, for example, be in the form of explosion-proof valves, gas valves, pressure relief valves, or safety valves and may, in particular, be pressure- or temperature-sensitive elements or structures.When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief component is actuated, or a weak structure provided in the pressure relief component is broken to form an opening or passage that can be used to release the internal pressure or temperature. Emissions from the battery cell include, among other things: electrolyte solution, dissolved or split cathode and anode foils, fragments of the separator, gases produced by the reaction at high temperature and high pressure (e.g. flammable gases such as CH4, CO), flames and the like. As shown in Figures 4A to 4C, the conductive elements 21 and 22 can be arranged on both sides of the electrode assembly 10 along the direction of extension of the winding shaft of the stacked structure 100, or on one side of the electrode assembly 10 along the direction of extension of the winding shaft of the stacked structure 100. In Figure 4B, the conductive element 21 is welded to the electrode foil at one end of the electrode assembly 100 and welded to the electrode exit section 45, and the conductive element 22 is welded to the electrode foil at the other end of the electrode assembly 100 and welded to the end cap 42. The conductive elements 21 and 22 can act as a collector to establish an electrical connection between the electrode assembly and the electrode terminals and structures such as the end caps. The conductive element can be a metallic conductor, for example, copper, iron, aluminum, steel, and aluminum alloy.In some embodiments, the conductive element may comprise a current collector disk or other structures. Fig. 6 is a schematic representation of the electrode foil and the electrode tab in an unfolded state according to some embodiments of the battery cell of the present application. Fig. 7 is a schematic representation of a cross-section of a structure according to some embodiments of the battery cell of the present application, in which the electrode tabs are welded to the conductive element. Fig. 8 is a schematic representation of a section of a plurality of tab stack regions of a tab stack structure according to some embodiments of the battery cell of the present application. As shown in Fig. 6, at least one of the several electrode foils of the electrode arrangement 10 comprises a collector substrate 11 and several electrode tabs 13. The electrode foil may further comprise an active substance layer 12 that covers the surface of at least one side of the collector substrate 11. The multiple electrode tabs 13 are connected to at least one side of the collector substrate 11 extending in the winding direction wd and are spaced apart from each other along the winding direction wd. The multiple electrode tabs 13 can be connected to one side of the collector substrate 11 extending in the winding direction wd, or to both sides of the collector substrate 11 extending in the winding direction wd. In some embodiments, the multiple electrode tabs 13 can be formed by cutting or trimming the collector substrate. In some other embodiments, the multiple electrode tabs 13 can be welded to each of the side edges of the collector substrate 11. Referring to Fig. 7, at least a portion of the multiple electrode tabs 13 is bent in a direction facing the winding shaft CL of the wound structure 100, and a tab stack structure 130 is formed at an end section of the wound structure 100. The tab stack structure 130 can be electrically connected to the electrode terminals 42 provided on the wall section of the outer housing 4A by means of the electrically conductive elements 21, 22 (e.g., current collector discs). In particular, the conductive elements 21, 22 are welded to the tab stack structure 130. The conductive elements 21, 22 are able to form continuous or discrete weld areas 30 with the tab stack structure 130, and for welding the conductive elements 21, 22 and the tab stack structure 130 using, for example, a laser, the weld areas 30 are represented as parts of liquid metal which are heated and melted to a specific geometry, i.e., a weld pool. As shown in Figures 7 and 8, the tab stack structure 130 comprises a first tab stack region 130a and a second tab stack region 130b, arranged in an outside-to-inward row along a direction facing the winding shaft CL. A partial section of the electrode foil, to which the individual windings are connected after the electrode tab has been wound, is shown in Figures 7 and 8 in the direction facing the winding shaft CL, with the winding shaft CL indicated by dashed lines. For simplicity, other electrode foils and separators in the wound structure are not shown in the figure. The number of tab stack layers in the first tab stack area 130a increases in the direction facing the winding axis CL. The number of tab stack layers in the second tab stack area 130b is the same in the direction facing the winding axis CL. The number of tab stack layers at a given position refers to the number of stack layers of the electrode tabs of the tab stack structure 130 that are connected at that position to the various windings of the electrode foils, i.e., the number of windings of the electrode foils corresponding to the individual electrode tabs stacked at that position. As shown in Fig. 8, the number of tab stack layers in the first tab stack region 130a decreases in the direction away from the winding shaft CL. With electrode tabs of essentially the same height, the number of stack layers gradually increases from 1 layer in the outermost layer to more than 10 layers. The position where the second tab stack region 130b meets the first tab stack region 130a is actually a position where the number of tab stack layers in the first tab stack region 130a no longer increases. The number of tab stack layers in the second tab stack region 130b is kept constant at various positions in the direction towards the winding shaft CL. As shown in Fig. 6, the first electrode tab 131 is defined as the electrode tab of the multiple electrode tabs 13 that is closest to the winding start point WS of the collector substrate. To facilitate the representation of the first electrode tab 131, the electrode foil in Fig. 6 has been spread out so that its longitudinal direction is practically identical to the winding direction. The winding start point WS is the starting position of the electrode foil when it is wound and is located on the innermost side of the wound structure. Accordingly, the second tab stack area 130 can extend to the tab winding circle where the first electrode tab 131 is located. Fig. 9 is a schematic representation of the distribution of the weld area in the plurality of tab stack regions of the tab stack structure according to some embodiments of the battery cell of the present application. As shown in Fig. 9, at least a portion of the conductive elements 21, 22 and at least a portion of the weld area 30 of the tab stack structure 130 is located in the second tab stack region 130b. In some embodiments, the weld area 30 is located entirely in the second tab stack region 103b; in other embodiments, a portion of the weld area 30 is located in the second tab stack region 103b and another portion is located in a different part of the tab stack structure than the second tab stack region 103b. Since the number of tab stack layers of the second tab stack area 130b is the same in the case of welding the conductive element 21, 22 with the tab stack structure 130 formed at the end of the wound structure 100, the second tab stack area 130b therefore has a higher number of tab stack layers and a greater stack thickness compared to the other tab stack areas and is therefore less susceptible to perforation when welded to the conductive element 21, 22. This improves the weld quality in the welding area 30 and reduces the risk of a short circuit due to burns on the separator 10c or the electrode foils during welding. As shown in Figures 7, 8 to 9, in some embodiments the weld area 30 comprises a first section 31 located in the second tab stack area 130b, and a second section 32 located in the first tab stack area 130a. The first tab stack area 130a is located on an outer side of the second tab stack area 130b, and the number of tab stack layers increases from the outside to the inside. The second tab stack area 130b and the first tab stack area 130a are each welded to the conductive element via the first section 31 and the second section 32 of the weld area 30, respectively. This increases the overall size of the weld area 30, thereby increasing the weld strength and reducing the resistance of the weld area 30, thus reducing the risk of overcurrent.The second section 32 can be connected to the first section 31 or spaced apart from the first section 31. In some embodiments, the tab stack structure 130 further comprises a third tab stack area 130c located on a side of the second tab stack area 130b facing the winding shaft CL, wherein the welding area 30 further comprises a third section 33 located in the third tab stack area 130c. The tab stack layers of the third tab stack area 130c are located within the second tab stack area 130b, and the number of tab stack layers decreases from the outside in. The third tab stack area 130c is welded to the conductive element 21, 22, thereby increasing the overall size of the weld area 30, thus increasing the weld strength and reducing the resistance of the weld area 30, thereby reducing the risk of overcurrent. The weld area can be distributed across multiple positions on the conductive element. This includes continuous or discrete weld segments located at various radial or circumferential positions. As shown in Fig. 9, the weld area 30 consists of a plurality of segments and can be shaped as straight segments, curved segments, or straight and curved segments connected together, etc. Fig. 10 is a schematic representation of the sizes of the various sections of the weld area according to some embodiments of the battery cell of the present application. For better understanding, weld areas distributed at different positions are shown schematically in a rectangular area, and dashed lines are used to indicate the parts of the weld areas that correspond to the different tab stack areas. In Fig. 10, the first section 31 corresponds to the second tab stack area 130b, the second section 32 to the first tab stack area 130a, and the third section 33 to the third tab stack area 130c. As shown in Fig. 10, in some embodiments, the ratio S1 / S of an area S1 of the first section 31 to an area S of the weld area 30 satisfies the following: S1 / S ≥ 70%. Here, the area S is the total area of ​​the weld area 30, and in Fig. 10, the area S is the sum of the areas S1, S2, and S3. As shown in Fig. 7, the weld area 30 cannot have an irregular three-dimensional shape. The area can be calculated here as the projection area of ​​the weld pool onto the surface of the conductive element on the side of the conductive element furthest from the tab stack structure. Since welding area 30 includes the first section 31 and may also include other sections, the ratio S1 / S represents the proportion of the first section 31 within welding area 30. Because the first section 31 is more likely to exhibit better weld quality, it is advantageous to improve the weld quality of welding area 30 by increasing this proportion. By ensuring that the S1 / S ratio is greater than or equal to 70%, the weld quality of welding area 30 can be improved, thereby reducing the risk of through-welding or cold welds of the electrode foils. Optionally, the ratio S1 / S of the area S1 of the first section 31 to the area S of the welding area 30 satisfies the following: S1 / S ≥ 90%, for example, by S1 / S being equal to 90%, 95%, 98%, or 100%. Furthermore, the ratio S1 / S is greater than or equal to 90%, thereby improving the weld quality in welding area 30 and effectively reducing the risk of penetration or cold welds of the electrode tabs. As shown in Figs. 9 and 10, in some embodiments the wound structure 100 is a cylindrical wound structure. The ratio L1 / L of the maximum radial length L1 of the first section 31 in the radial direction of the cylindrical wound structure to the maximum radial length L of the weld area 30 in the radial direction of the cylindrical wound structure is as follows: L1 / L ≥ 70%. Here, the maximum radial length L is the maximum length of the weld area 30 in the radial direction, and in Fig. 10, the maximum radial length L is the sum of the maximum radial lengths L1, L2, and L3. When determining the maximum radial length of each section, the positions furthest and closest to the winding shaft CL of each section of the welding area can be selected, and the difference between the shortest distance from the furthest and closest positions to the winding shaft CL can be calculated as the maximum radial length of the corresponding section. Since welding area 30 includes the first section 31 and may also include other sections, the ratio L1 / L represents the proportion of the first section 31 within welding area 30. Because the first section 31 is more likely to exhibit better weld quality, it is advantageous to improve the weld quality of welding area 30 by increasing this proportion. By ensuring that the ratio L1 / L is greater than or equal to 70%, the weld quality of welding area 30 can be improved, thereby reducing the risk of through-welding or cold welds of the electrode foils. Optionally, the ratio L1 / L of the maximum radial length L1 of the first section 31 in the radial direction of the cylindrically wound structure to the maximum radial length L of the welding area 30 in the radial direction of the cylindrically wound structure satisfies the following: L1 / L ≥ 90%, for example, L1 / L is equal to 90%, 95%, 98%, or 100%. Furthermore, the ratio L1 / L is greater than or equal to 90%, which improves the weld quality in the welding area 30 and effectively reduces the risk of penetration or cold welds of the electrode tabs. As shown in Fig. 6, in some embodiments, a minimum distance d between a winding start end WS of the collector substrate 11 in the winding direction wd and the second electrode tab 132 satisfies the following: d ≤ 1200 mm. The second electrode tab 132 is defined as one of the several electrode tabs 13 that is welded to the conductive element 21, 22 and is closest to the winding start end WS. Here, the second electrode tab 132 is located on the side of the first electrode tab 131 facing away from the winding start end WS, whereas in some other embodiments, the second electrode tab 132 can also be the first electrode tab 131, i.e., in the case where the first electrode tab of the electrode foil is welded to the conductive elements 21, 22. In this case, the minimum distance d in the wound state of the electrode foil is not easy to measure, and the value of the minimum distance d can be determined by measuring the electrode foil in the flattened state, where the winding direction wd also corresponds to the direction in which the electrode foil is flattened in a direction parallel to its length. Since the second electrode tab 132 is both welded to the conductive elements 21, 22 and is also closest to the winding start WS, its minimum distance d from the winding start WS can reflect the area of ​​the electrode tabs that are directly connected to the conductive elements 21, 22 via the weld area 30. The charge of the electrode foils flows through the weld area of ​​the multiple electrode foils and the conductive element towards the conductive element, while the charge of the electrode foils in the part of the electrode foils between the second electrode tab 132 and the beginning of the winding flows more towards the second electrode tab 132, making the second electrode tab 132 more susceptible to overcurrent. The minimum distance d is less than or equal to 1200 mm, which increases the reach of the electrode tabs directly connected to the conductive element 21, 22 via the weld area 30, reduces the risk of overcurrent in the second electrode tab 132, and thus minimizes the risk of overheating of the electrode tabs, which could impair the performance of the chemical substances within the electrode arrangement 10. Optionally, the minimum distance d fulfills the following: d ≤ 800 mm, for example, d is equal to 800 mm, 680 mm, 540 mm, 500 mm, etc. The minimum distance d is further limited within an optional range, thereby significantly increasing the reach of the electrode tabs directly connected to the conductive element 21, 22 via the welding area 30, further reducing the risk of overcurrent in the first electrode tab 131, and thus effectively minimizing the risk of overheating of the electrode tabs, which could impair the performance of the chemical substances within the electrode arrangement 10. As shown in Fig. 7, in some embodiments the maximum value Hmax of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the extension direction of the winding shaft CL satisfy the following: 1.5*t ≤ Hmax ≤ 1.9*t. When the conductive elements 21, 22 are welded to the stacked electrode tabs to form a weld pool extending from the surface of the conductive elements 21, 22 laterally towards the electrode tab, the ratio between the depth of the welding area 30 (i.e., the weld pool) and the thickness of the conductive elements 21, 22 can satisfy a certain range of values, which depends on factors such as the power used in welding and the overlap thickness. The depth H of the weld area 30 can be measured with the surface of the conductive elements 21, 22 on the side facing away from the electrode arrangement as a reference. For a given weld pool, the distance from the deepest position of the weld pool along the direction of extension of the winding shaft CL to this surface of the conductive element is the weld pool depth. The maximum value Hmax and the minimum value Hmin of the depth of the weld area 30 are the maximum and minimum values ​​of the distance from the deepest position of each section of the entire weld area 30 to this surface of the conductive element along the direction of extension of the winding shaft CL. For the maximum value Hmax of the depth of the welding area 30, if the ratio to the thickness t of the conductive elements 21, 22 is too large, there is an increased risk of through-welded electrode tabs, while if the ratio is too small, there is an increased risk of cold welds on the electrode tabs. Therefore, by adjusting the ratio between the maximum value Hmax of the depth of the welding area 30 and the thickness t of the conductive elements 21, 22 within a specific range, the risk of through-welds and cold welds on the electrode tabs can be minimized. Optionally, the maximum value Hmax of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the extension direction of the winding shaft CL satisfy the following: 1.6*t ≤ Hmax ≤ 1.8*t, for example, Hmax is 1.6*t, 1.65*t, 1.7*t, 1.8*t, etc. By further adjusting the ratio between the maximum value Hmax of the depth of the welding area 30 and the thickness t of the conductive element 21, 22 within an optional range, the risk of weld penetration and cold solder joints of the electrode tabs can be effectively minimized. In some embodiments, the minimum value Hmin of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the direction of the winding shaft CL satisfy the following: 1.1*t ≤ Hmin ≤ 1.5*t. For the minimum value Hmin of the welding area 30 depth, if the ratio to the thickness t of the conductive elements 21, 22 is too large, there is an increased risk of through-welded electrode tabs, while if the ratio is too small, there is an increased risk of cold welds on the electrode tabs. Therefore, by adjusting the ratio between the minimum value Hmin of the welding area 30 depth and the thickness t of the conductive element 21, 22 within a certain range, the risk of through-welds and cold welds can be minimized. Optionally, the minimum value Hmin of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the extension direction of the winding shaft CL satisfy the following: 1.2*t ≤ Hmin ≤ 1.4*t, for example, Hmin is 1.2*t, 1.25*t, 1.3*t, 1.4*t, etc. By further adjusting the ratio between the minimum value Hmin of the depth of the welding area 30 and the thickness t of the conductive element 21, 22 within an optional range, the risk of through-welding and cold soldering of the electrode tabs can be effectively minimized. The difference between the maximum value Hmax and the minimum value Hmin of the depth H of weld area 30 can reflect the range of depth variation within weld area 30. If the difference is too large, indicating a significant variation in the depth of weld area 30, the risk of localized penetration or cold welds may be increased. If the difference is too small, indicating a relatively uniform depth of weld area 30, and considering that the tab stack thickness varies, the risk of localized penetration or cold welds may be increased in areas where the stack thickness is thinner or thicker. In some embodiments, the difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the extension direction of the winding shaft CL satisfy the following: 0.2*t ≤ (Hmax-Hmin) ≤ 0.8*t, thereby reducing the risk of perforation and cold welds. Optionally, the difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the welding area 30 and the thickness t of the conductive element 21, 22 in the extension direction of the winding shaft CL satisfy the following: 0.3*t ≤ (Hmax-Hmin) ≤ 0.6*t, for example, (Hmax-Hmin) is 0.3*t, 0.4*t, 0.5*t, 0.6*t, etc. By further adjusting the ratio between the difference (Hmax-Hmin) and the thickness t within an optional range, the risk of over-welding and cold welds of the electrode tabs can be further minimized. Fig. 11 is a schematic representation of the overlapping of adjacent electrode tabs in various tab stack regions according to some embodiments of the battery cell of the present application. Figs. 12 and 13 are schematic representations of the size ratios of different shapes of electrode tabs connected to an electrode foil according to some embodiments of the battery cell of the present application. As shown in Fig. 11, the curvature of the tab winding circles at different radius positions of the wound structure 100 varies with the size of the radius, and the smaller the radius, the greater the curvature of the tab winding circles. The previously mentioned number of tab stack layers is the number of stack layers of the electrode tabs to which the various film winding circles are connected. It also takes into account the possibility that two or more adjacent electrode tabs connected to the same film winding circle may overlap. Therefore, if the number of tab stack layers in the second tab stack area 130a is the same along the direction CL facing the winding shaft, the tab stack thickness in the second tab stack area 130a increases along the direction facing the winding shaft because the adjacent tabs interlock more strongly at positions closer to the winding shaft. In Fig. 11, the radius of the foil winding circle containing the root of the tab of the first electrode tab closest to the winding start WS (i.e., the first electrode tab 131) is r1, and the radius of the foil winding circle containing the root of the tab of the electrode tab furthest from the winding start WS is r2. In the plurality of tabs connected by the respective foil winding circles, adjacent electrode tabs can overlap after being bent inwards. The greater the curvature of the foil winding circle, the more adjacent electrode tabs in the plurality of connected electrode tabs 13 overlap, and consequently, the tab stack thickness increases. In Figures 12 and 13, the electrode tabs 13 can be bent at their roots 13r, and the roots 13r of the electrode tabs 13 can be locations on the collector substrate where the electrode tabs 13 are cut. The width of the top surface 13t of the electrode tab 13 is defined as w, and the top distance between the top surfaces 13t of adjacent electrode tabs is defined as e. As shown in Figures 12 and 13, in some embodiments, a top distance e between adjacent electrode tabs in the multiple electrode tabs 13 in the winding direction wd satisfies the following: e ≤ 0.5 mm. The larger the upper distance e between adjacent electrode tabs, the less or no overlap occurs after adjacent electrode tabs are bent inwards; conversely, the smaller the upper distance e, the more overlap occurs after adjacent electrode tabs are bent inwards. The upper distance e between adjacent electrode tabs is less than or equal to 0.5 mm, which allows for an increased degree of tab stacking, resulting in a greater tab stack thickness and a reduced risk of electrode tab perforation. Optionally, an upper distance e between adjacent electrode tabs 13 in the multiple electrode tabs in the winding direction wd satisfies the following: e ≤ 0.2 mm, for example, e is 0.2 mm, 0.18 mm, 0.12 mm, 0.06 mm. The upper distance e between the electrode tabs is also less than or equal to 0.2 mm, which effectively leads to a greater tab stack thickness and a lower risk of electrode tab penetration. It is assumed that rectangular or parallelogram-shaped electrode tabs allow a smaller upper distance between the electrode tabs, which enables a stronger interlocking of adjacent electrode tabs, as shown in Fig. 12 and Fig. 13. In some embodiments, at least a portion of the multiple electrode tabs 13 have a rectangular or parallelogram shape, thereby increasing the tab stack thickness and reducing the risk of electrode tabs being welded through. As the film winding layer bends closer to the winding shaft CL, more electrode tabs are connected and stacked, so that the tab stack thickness gradually increases from the outside to the inside. This allows the welding performance to be progressively increased from the outside to the inside, so that in some embodiments the depth of the first section 31 increases in the direction of extension of the winding shaft CL in the direction facing the winding shaft CL. This increasing depth from the outside to the inside improves the weld quality of the weld area 30. In embodiments where the welding area 30 also includes a second section 32 located in the first tab stack area 130a, and considering that the first tab stack area 130a has fewer tab stack layers and a relatively shallow weld pool depth without perforation, it is possible to reduce the welding power used for welding in the first tab stack area 130a compared to the welding power used for welding in the second tab stack area 130b. In some embodiments, the depth of the first section 31 in the direction of the winding shaft CL is therefore less than the depth of the second section 32, in order to improve the weld quality in the second section 32 of the first tab stack area 130a and to reduce the risk of electrode perforation. Fig. 14 is a schematic representation of the size of the bent electrode tabs and the central hole according to some embodiments of the battery cell of the present application. As shown in Figs. 5, 9, 12, 13 and 14, the wound structure 100 in some embodiments is a cylindrically wound structure, wherein the cylindrically wound structure has a central hole 110. A minimum distance r1 between the winding shaft CL and the tab root of the first electrode tab 131 satisfies the following: r1 ≥ h0+0.8*R. h0 is a height of the first electrode tab 131 in an unstuck state in the extension direction of the winding shaft CL, where R is a radius of a cross-section of the central hole 110 at the end section of the wound structure 100. In the winding direction wd, the first electrode tab 131 is closest to the winding start WS of the collector substrate 11. If the first electrode tab 131 is bent inwards, it is more likely to cover part of the central hole 110 than an electrode tab connected to a foil winding circle with a larger radius. The minimum distance r1 is greater than or equal to the sum of the height h0 of the first electrode tab 131 and 0.8 times the radius R of the central hole 110.This corresponds to the fact that the first electrode tab 131, which is closest to the winding shaft CL, does not cover more than 20% of the radius area of ​​the central hole 110 after it has been bent from the outside inwards in order to reduce the blockage of the central hole 110 by bending the electrode tabs, to avoid interfering with the injection of the electrolyte solution and to reduce the risk of a short circuit caused by the electrode tabs being inserted downwards or tearing during the injection of the electrolyte solution. Optionally, a minimum distance r1 between the winding shaft CL and the root of the first electrode tab 131 satisfies the following: r1 ≥ h0+R. The minimum distance r1 is greater than or equal to the sum of the height h0 of the first electrode tab 131 and the radius R of the central hole 110, which means that the first electrode tab 131, which is closest to the winding shaft CL, does not cover the central hole 110 after bending from the outside in, so that the influence of electrolyte solution injection due to the electrode tab covering the central hole 110 is more efficiently avoided. Fig. 15 is a schematic representation of the height of the electrode tab in an unbent state according to some other embodiments of the battery cell of the present application. Fig. 16 is a schematic representation of a section of the plurality of tab stack areas after the electrode tabs of Fig. 15 have been bent in one direction towards the side of the central hole. As in Fig. 15 and Fig. 16, in some embodiments the multiple electrode tabs 13 comprise a first tab group 13a and a second tab group 13b. Several foil winding circles in which the first tab group 13a is located are situated outside at least one foil winding circle in which the second tab group 13b is located. In the extension direction of the winding shaft CL, the minimum height h1 of the first tab group 13a in the straight state is greater than the maximum height h2 of the second tab group 13b in the straight state. The maximum height h2 of the second tab group 13b, located on the inside of the first tab group 13a, is less than the minimum height h1 of the first tab group 13a. This allows the first electrode tab 131, which is connected to the welding area 30, to be positioned closer to the winding start WS, thus helping to reduce the risk of overcurrent of the first electrode tab 131. Furthermore, the smaller height of the electrode tab of the first tab group 13a can reduce or eliminate the coverage of the central hole 110, effectively preventing the effect of electrolyte solution injection due to the electrode tab covering the central hole 110. As shown in Figs. 15 and 16, the second tab group 13b comprises the first electrode tab 131, the height h2 of the second tab group 13b decreasing in the direction facing the winding shaft CL in the extension direction of the winding shaft CL when the state is not bent. In Fig. 15, the height of the electrode tab of the second tab group 13b gradually decreases in a direction facing the winding shaft CL, thereby bringing the first electrode tab 131 in Fig. 16 closer to the winding shaft CL and thus increasing the circumference of the second tab stack area 130b. The decreasing height of each winding of the electrode tabs of the first tab group 13a from the outside to the inside allows the second tab stack area 130b to extend further in the direction of the winding shaft CL, thereby increasing the size of the second tab stack area 130b, which in turn allows an increase in the size of the welding area 30 in the first section 31 of the second tab stack area 130b, improves the quality of the weld in the welding area 30 and reduces the risk of through-welding or cold welds of the electrode tabs. Based on various embodiments of the battery cell described above in the present application, the present application also provides embodiments of batteries that utilize embodiments of the battery cell described above. The battery comprises a battery cell from one of the embodiments described above. The battery that utilizes the embodiments of the battery cell described above can be manufactured with superior operational reliability. Another aspect of the present application provides a power-consuming device comprising the above-mentioned battery. The power-consuming device, which uses the above-mentioned battery, can be manufactured with superior operational reliability. Although the present application is described with reference to preferred embodiments, various improvements can be made to it and parts thereof can be replaced by equivalents without departing from the scope of the present application. In particular, any of the technical features mentioned in the various embodiments can be combined in any way, as long as there is no structural conflict. The present application is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions that fall within the scope of the claims.

Claims

Battery cell (40) comprising: an electrode arrangement (10) comprising several electrode foils (10a, 10b) and a separator (10c) located between adjacent electrode foils (10a, 10b) of opposite polarity in the several electrode foils (10a, 10b), wherein the several electrode foils (10a, 10b) and the separator (10c) are wound along a winding direction (wd) and form a wound structure (100); wherein at least one of the several electrode foils (10a, 10b) comprises a collector substrate (11) and several electrode tabs (13), wherein the several electrode tabs (13) are connected to at least one lateral edge of the collector substrate (11) extending along the winding direction (wd) and are spaced apart along the winding direction (wd);wherein at least a portion of the multiple electrode tabs (13) is bent in a direction facing a winding shaft (CL) of the wound structure (100) and forms a tab stack structure (130) at an end section of the wound structure (100); an outer housing (4A) having a chamber that accommodates the electrode arrangement (10); an electrode clamp (42) provided on a wall section of the outer housing (4A); and a conductive element (21, 22) welded to the tab stack structure (130) and electrically connected to the electrode clamp (42). Battery cell (40) according to claim 1, wherein the tab stack structure (130) comprises a first tab stack region (130a) and a second tab stack region (130b) arranged in an outside-to-inside row along the direction facing the winding shaft (CL), wherein the number of tab stack layers of the first tab stack region (130a) increases along the direction facing the winding shaft (CL); wherein the number of tab stack layers of the second tab stack region (130b) is the same in the direction facing the winding shaft (CL), wherein the conductive element (21, 22) and at least a part of a weld area (30) of the tab stack structure (130) are located in the second tab stack region (130b). Battery cell (40) according to claim 2, wherein the welding area (30) comprises a first section (31) located in the second tab stack area (130b) and a second section (32) located in the first tab stack area (130a). Battery cell (40) according to claim 2 or 3, wherein the tab stack structure (130) further comprises a third tab stack area (130c) located on a side of the second tab stack area (130b) facing the winding shaft (CL), wherein the welding area (30) further comprises a third section (33) located in the third tab stack area (130c). Battery cell (40) according to one of claims 2 to 4, wherein a ratio S1 / S of an area S1 of the first section (31) to an area S of the welding area (30) satisfies the following: S1 / S ≥ 70%. Battery cell (40) according to claim 5, wherein the ratio S1 / S of the area S1 of the first section (31) to the area S of the welding area (30) satisfies the following: S1 / S ≥ 90%. Battery cell (40) according to one of claims 2 to 6, wherein the wound structure (100) is a cylindrically wound structure; wherein a ratio L1 / L of a maximum radial length L1 of the first section (31) in a radial direction of the cylindrically wound structure to a maximum radial length L of the weld area (30) in the radial direction of the cylindrically wound structure satisfies the following: L1 / L ≥ 70%. Battery cell (40) according to claim 7, wherein the ratio L1 / L of the maximum radial length L1 of the first section (31) in the radial direction of the cylindrically wound structure to the maximum radial length L of the welded area (30) in the radial direction of the cylindrically wound structure satisfies the following: L1 / L ≥ 90%. Battery cell (40) according to one of claims 1 to 8, wherein a minimum distance d between a winding start end (WS) of the collector substrate (11) in the winding direction (wd) and the second electrode tab (132) satisfies the following: d ≤ 1200 mm; wherein the second electrode tab (132) is defined as one electrode tab of the several electrode tabs (13) that is welded to the conductive element (21, 22) and is closest to the winding start end (WS). Battery cell (40) according to claim 9, wherein the minimum distance d satisfies the following: d ≤ 800 mm. Battery cell (40) according to one of claims 1 to 10, wherein a maximum value Hmax of a depth H of the weld area (30) of the conductive element (21, 22) and the tab stack structure (130) in an extension direction of the winding shaft (CL) and a thickness t of the conductive element (21, 22) satisfy the following: 1.5*t ≤ Hmax ≤ 1.9*t. Battery cell (40) according to claim 11, wherein the maximum value Hmax of the depth H of the weld area (30) and the thickness t of the conductive element (21, 22) in the extension direction of the winding shaft (CL) satisfy the following: 1.6*t ≤ Hmax ≤ 1.8*t. Battery cell (40) according to one of claims 1 to 12, wherein a minimum value Hmin of the depth H of the weld area (30) of the conductive element (21, 22) and the tab stack structure (130) in the extension direction of the winding shaft (CL) and the thickness t of the conductive element (21, 22) satisfy the following: 1.1*t ≤ Hmin ≤ 1.5*t. Battery cell (40) according to claim 13, wherein the minimum value Hmin of the depth H of the weld area (30) and the thickness t of the conductive element (21, 22) in the extension direction of the winding shaft (CL) satisfy the following: 1.2*t ≤ Hmin ≤ 1.4*t. Battery cell (40) according to one of claims 1 to 14, wherein a difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the weld area (30) of the conductive element (21, 22) and the tab stack structure (130) in the extension direction of the winding shaft (CL) and the thickness t of the conductive element (21, 22) satisfy the following: 0.2*t ≤ (Hmax-Hmin) ≤ 0.8*t. Battery cell (40) according to claim 15, wherein the difference (Hmax-Hmin) between the maximum value Hmax and the minimum value Hmin of the depth H of the weld area (30) and the thickness t of the conductive element (21, 22) in the extension direction of the winding shaft (CL) satisfy the following: 0.3*t ≤ (Hmax-Hmin) ≤ 0.6*t. Battery cell (40) according to one of claims 1 to 16, wherein an upper distance e between adjacent electrode tabs in the multiple electrode tabs (13) in the winding direction (wd) satisfies the following: e ≤ 0.5 mm. Battery cell (40) according to claim 17, wherein the upper distance e between the adjacent electrode tabs in the multiple electrode tabs (13) in the winding direction (wd) satisfies the following: e ≤ 0.2 mm. Battery cell (40) according to one of claims 1 to 18, wherein the weld area (30) of the conductive element (21, 22) and the tab stack structure (130) comprises a first section (31) located in the second tab stack area (130b); wherein the depth of the first section (31) increases in the extension direction of the winding shaft (CL) in the direction facing the winding shaft (CL). Battery cell (40) according to one of claims 1 to 19, wherein the weld area (30) of the conductive element (21, 22) and the tab stack structure (130) comprises a first section (31) located in the second tab stack area (130b) and a second section (32) located in the first tab stack area (130a); wherein the depth of the first section (31) is less than the depth of the second section (32) in the extension direction of the winding shaft (CL). Battery cell (40) according to one of claims 1 to 20, wherein at least a part of the multiple electrode tabs (13) has a rectangular or parallelogram shape. Battery cell (40) according to one of claims 1 to 21, wherein the wound structure (100) is a cylindrically wound structure, wherein the cylindrically wound structure has a central hole (110), wherein a minimum distance r1 between the winding shaft (CL) and a tab root of the first electrode tab (131) satisfies the following: r1 ≥ h0 + 0.8 * R; where h0 is a height of the first electrode tab in an undistorted state in the extension direction of the winding shaft (CL), where R is a radius of a hole section of the central hole (110) at the end section of the wound structure (100). Battery cell (40) according to claim 22, wherein a minimum distance r1 between the winding shaft (CL) and the tab root of the first electrode tab (131) satisfies the following: r1 ≥ h0+R. Battery cell (40) according to one of claims 1 to 23, wherein the multiple electrode tabs (13) comprise a first tab group (13a) and a second tab group (13b), wherein multiple foil winding circles in which the first tab group (13a) is located are arranged on an outside of at least one foil winding circle in which the second tab group (13b) is located; wherein in the extension direction of the winding shaft (CL) a minimum height h1 of the first tab group (13a) in the unbent state is greater than a maximum height h2 of the second tab group (13b) in the unbent state. Battery cell (40) according to claim 24, wherein the second tab group (13b) comprises the first electrode tab (131), wherein the height h2 of the second tab group (13b) decreases in the straight state in the direction facing the winding shaft (CL) in the extension direction of the winding shaft (CL). Battery cell (40) according to any one of claims 1 to 25, wherein the outer casing (4A) comprises a casing body (41) and an end cap (42), wherein an end of the casing body (41) has an opening (411), wherein the end cap (42) covers the opening (411), wherein the casing body (41) comprises a side wall (414) and a bottom wall (413); wherein the side wall (414) surrounds an outer surface of the electrode arrangement (10), wherein the bottom wall (413) is provided opposite the opening (411), and wherein a wall section of the outer casing (4A) is either the end cap (42) or the bottom wall (413). Battery (50) comprising a battery cell (40) according to any one of claims 1 to 26. Power-consuming device comprising a battery (50) according to claim 27.

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