Battery cell, battery device and electric device

Abstract

The utility model discloses a battery monomer, a battery device and a power utilization device, the battery monomer comprises a shell and an electrode assembly, the electrode assembly is arranged in the shell, the electrode assembly comprises a main body part and a tab led out from the end part of the main body part, and the tab comprises a tab body and a reinforcing structure arranged on the tab body; the reinforcing structure comprises a first reinforcing part and a second reinforcing part which are different in shape; the first reinforcing parts and the second reinforcing parts are arranged at intervals. The reliability of the battery monomer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. BACKGROUND

[0002] In recent years, with the rapid development of new energy technology, new energy vehicles are increasingly widely used and gradually replace traditional fuel vehicles to become one of the mainstream transportation tools. As the power source of new energy vehicles, power batteries are one of the core equipment of new energy vehicles, and therefore the safety performance of power batteries has become the focus of attention.

[0003] In the development of battery technology, how to improve the reliability of battery monomers is a research direction in battery technology. CONTENT OF THE INVENTION

[0004] The embodiments of the present application provide a battery monomer, a battery device and a power utilization device, which can improve the reliability of the battery monomer.

[0005] In a first aspect, the embodiments of the present application provide a battery monomer, which comprises a shell and an electrode assembly, the electrode assembly is arranged in the interior of the shell, the electrode assembly comprises a main body part and a tab led out from the end of the main body part, the tab comprises a tab body and a reinforcing structure arranged on the tab body, the reinforcing structure comprises a first reinforcing part and a second reinforcing part which are different in shape, and the first reinforcing part is arranged in space from the second reinforcing part.

[0006] In the above scheme, by arranging the first reinforcing part and the second reinforcing part which are different in shape on the tab body, the tab can resist more directional forces, has stronger stability, and the reliability of the battery monomer is improved. Moreover, the first reinforcing part and the second reinforcing part are arranged in space, which can increase the setting area of the reinforcing ribs, further improve the strength of the tab, reduce the position of deformation of the tab, and improve the reliability of the battery monomer.

[0007] In some embodiments, the reinforcing structure comprises at least one first reinforcing part and at least one second reinforcing part, the first reinforcing part and the second reinforcing part are arranged in space along a first direction, a plurality of reinforcing structures are arranged in space along a second direction along the second direction, the first direction and the second direction are arranged in intersection, and the first direction and the second direction are perpendicular to the thickness direction of the tab body.

[0008] In the above scheme, by arranging the first reinforcing part and the second reinforcing part more dispersedly and uniformly, the strength and stability of the tab are further improved.

[0009] In some embodiments, the first reinforcing part and the second reinforcing part are arranged in alternation along the first direction.

[0010] In the above scheme, by alternately arranging the first reinforcing part and the second reinforcing part along the first direction, the reinforcing ribs of different shapes can be more evenly arranged along the first direction, better resist the force along the second direction, and reduce the phenomenon of the tab being folded and deformed along the second direction.

[0011] In some embodiments, the first reinforcing part and the second reinforcing part are alternately arranged along the second direction.

[0012] In the above scheme, by alternately arranging the first reinforcing part and the second reinforcing part along the second direction, the reinforcing ribs of different shapes can be more evenly arranged along the second direction, better resist the force along the first direction, and reduce the phenomenon of the tab being folded and deformed along the first direction.

[0013] In some embodiments, in the reinforcing structures adjacent along the second direction, the first reinforcing part is arranged in a staggered manner.

[0014] In the above scheme, by arranging the first reinforcing part in a staggered manner in the reinforcing structures adjacent along the second direction, the first reinforcing part arranged in a staggered manner in the adjacent reinforcing structures can resist the force along the second direction, thereby improving the utilization rate of the first reinforcing part.

[0015] In some embodiments, the first reinforcing part includes a first end and a second end arranged opposite along the first direction, and in the reinforcing structures adjacent along the second direction, the first end of the first reinforcing part in one column is flush with the second end of the first reinforcing part arranged in a staggered manner, or in the second direction, the projection of the first reinforcing part in one column overlaps with the projection of the first reinforcing part arranged in a staggered manner in another column.

[0016] In the above scheme, by further reducing the gap of the first reinforcing part arranged in a staggered manner in the adjacent reinforcing structures along the first direction, it is ensured to a certain extent that the tab will not be folded and deformed between the first reinforcing parts arranged in a staggered manner in the adjacent reinforcing structures.

[0017] In some embodiments, the lengths of the first reinforcing parts in at least two columns of reinforcing structures are inconsistent along the first direction.

[0018] In the above scheme, by arranging the first reinforcing parts of different lengths in different reinforcing columns, the number of second reinforcing parts can be increased according to the needs, and the stability and strength of the tab can be improved by the cooperation of reinforcing ribs of different shapes and different sizes.

[0019] In some embodiments, the first reinforcing part is rectangular or elliptical, and the second reinforcing part is circular or polygonal.

[0020] In the above scheme, by matching the longer first reinforcing part with the circular or polygonal second reinforcing part, the stability and strength of the tab can be further improved.

[0021] In some embodiments, the area of the second reinforcing part is S1, the area of the first reinforcing part is S2, and S1 / S2 satisfies 0.1≤S1 / S2≤10.

[0022] In the above scheme, by limiting S1 / S2 within a suitable range, the effects of the first reinforcing part and the second reinforcing part can be considered, so that the tab can balance the force in each direction.

[0023] In some embodiments, S1 / S2 satisfies 1≤S1 / S2≤2.

[0024] In the above scheme, by further limiting the range of S1 / S2, the tab can more evenly resist the force in each direction, thereby reducing the deformation of each position of the tab.

[0025] In some embodiments, the tab includes a first side and a second side arranged opposite to each other, the first side is closer to the main body part than the second side, the width of the first side is greater than the width of the second side; and the first reinforcing part or the second reinforcing part is arranged at least in the area close to the second side.

[0026] In the above scheme, by setting the width of the first side of the tab close to the main body part to be greater than the width of the second side, the flow area at the connection between the tab and the main body part can be improved, thereby improving the flow capacity at this position and improving safety. In addition, by arranging the first reinforcing part or the second reinforcing part at least in the area close to the second side, the stability of the position where the tab is more likely to be folded and deformed can be improved.

[0027] In some embodiments, the tab body includes a first surface and a second surface arranged opposite to each other, part of the first reinforcing part and the second reinforcing part is protrudingly arranged towards the first surface, and the other part is protrudingly arranged towards the second surface.

[0028] In the above scheme, by arranging the reinforcing ribs on the first surface and the second surface of the tab body, the stability of the tab can be stronger.

[0029] In some embodiments, the first reinforcing part is protrudingly arranged towards the first surface, and the second reinforcing part is protrudingly arranged towards the second surface.

[0030] In the above scheme, by arranging reinforcing ribs of different shapes on different surfaces, the first reinforcing part corresponding pressing roller and the second reinforcing part corresponding pressing roller can respectively complete pressing, thereby improving the preparation efficiency of the tab.

[0031] In a second aspect, the embodiments of the present application provide a battery device, including the battery monomer of any of the above embodiments.

[0032] In a third aspect, the embodiments of the present application provide a power utilization device, comprising the battery device, and the battery device is configured to provide power.

[0033] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will specifically describe the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0035] Figure 1 is a structural schematic diagram of a vehicle of some embodiments of the present application;

[0036] Figure 2 is an exploded view of a battery device of some embodiments of the present application;

[0037] Figure 3 is a structural schematic diagram of a battery module of some embodiments of the present application;

[0038] Figure 4 is an exploded structural schematic diagram of a battery cell of some embodiments of the present application;

[0039] Figure 5 is a structural schematic diagram of a tab of some embodiments of the present application;

[0040] Figure 6 is a partial schematic diagram of a tab of some embodiments of the present application;

[0041] Figure 7 is a partial schematic diagram of a tab of some embodiments of the present application;

[0042] Figure 8 is a structural schematic diagram of a tab of some embodiments of the present application;

[0043] Figure 9 is a side schematic diagram of a tab of some embodiments of the present application.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, upper cover; 30, case; 400, battery module; 20, battery cell; 22, case; 21, end cover; 23, electrode assembly; 26, electrode terminal; 24, housing; 25, main body portion; 40, tab; 41, tab body; 411, first surface; 412, second surface; 42, reinforcing structure; 421, first reinforcing portion; 422, second reinforcing portion; 423, first end; 424, second end; 43, first side; 44, second side; 45, reinforcing column; X, first direction; Y, second direction; Z, thickness direction. DETAILED DESCRIPTION

[0046] The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description and drawings of the following examples are illustrative only and are not intended to limit the scope of the present application, that is, the present application is not limited to the described examples.

[0047] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0048] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0049] The orientation words appearing in the following description are the directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, the battery cell can include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc. The present application embodiments are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. The present application embodiments are also not limited thereto. The battery cell is generally divided into three types according to the packaging method: a cylindrical battery cell, a square battery cell, and a soft-pack battery cell, etc. The present application embodiments are also not limited thereto.

[0051] The battery device mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0052] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0053] In some embodiments, the battery device can be a battery pack including a box body and one or more battery cell assemblies accommodated in the box body.

[0054] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0055] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0056] The embodiments of the present application provide a power consumption device using a battery as a power source. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0057] In the preparation process of the electrode assembly, the tab will pass through many transmission rollers or flattening rollers, belts, etc. It is easy to cause the tab to wrinkle, bend, etc. which affects the subsequent stacking and welding of the electrode piece, and may even cause the internal resistance to increase, resulting in a decrease in the performance of the battery cell, thereby reducing the reliability of the battery cell.

[0058] In order to solve the above technical problems, the battery monomer provided by the embodiment of the present application sets the first reinforcing part and the second reinforcing part with different shapes on the tab body, so that the tab can resist more directional forces and has stronger stability, and the reliability of the battery monomer is improved. Moreover, the first reinforcing part and the second reinforcing part are arranged in a spaced manner, which can increase the setting area of the reinforcing ribs, further improve the strength of the tab, reduce the position of the tab deformation, and improve the reliability of the battery monomer.

[0059] The following embodiments take a vehicle 1000 as an example for the purpose of convenient description.

[0060] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0061] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0062] Please refer to Figure 2 , Figure 2 The exploded view of the device provided by some embodiments of the present application is shown. The battery device 100 includes a battery box and a battery monomer 20. In some embodiments, the battery box can include an upper cover 10 and a box 30, and the upper cover 10 and the box 30 are covered with each other, and the upper cover 10 and the box 30 jointly define a containing cavity for containing the battery monomer 20. The box 30 can be a hollow structure with one end open, and the upper cover 10 can be a plate-shaped structure, and the upper cover 10 is covered on the open side of the box 30 to make the upper cover 10 and the box 30 jointly define the containing cavity; the upper cover 10 and the box 30 can also be hollow structures with one side open, and the open side of the upper cover 10 is covered on the open side of the box 30. Of course, the battery box formed by the upper cover 10 and the box 30 can have various shapes, such as a cylinder, a cuboid, etc.

[0063] Figure 3A structural schematic diagram of a battery module according to some embodiments of the present application. In the battery device 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in both series and parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple battery cells 20 is accommodated in the box. Of course, the battery device 100 can also be in the form that the multiple battery cells 20 are first connected in series, in parallel, or in a mixed manner to form a battery module 400, and the multiple battery modules 400 are connected in series, in parallel, or in a mixed manner to form a whole, and the whole is accommodated in the box. The battery device 100 can also include other structures. For example, the battery device 100 can also include a current collecting component for realizing electrical connection between the multiple battery cells 20.

[0064] Each battery cell 20 can be a secondary battery cell or a primary battery cell, and can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0065] Please refer to Figure 4 , Figure 4 A disassembled structural schematic diagram of a battery cell according to some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. The battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components.

[0066] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 21 is not easy to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cover 21 can be provided with functional components such as an electrode terminal 26. The electrode terminal 26 can be used for electrical connection with the electrode assembly 23 for output or input of the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0067] Figure 5is a structural schematic diagram of a tab of some embodiments of the present application.

[0068] As shown in Figure 5 In a first aspect, some embodiments of the present application provide a battery cell 20, the battery cell 20 comprising a housing 24 and an electrode assembly 23, the electrode assembly 23 being disposed inside the housing 24, the electrode assembly 23 comprising a main body portion 25 and a tab 40 extending from an end of the main body portion 25, the tab 40 comprising a tab body 41 and a reinforcing structure 42 disposed on the tab body 41, the reinforcing structure 42 comprising a first reinforcing portion 421 and a second reinforcing portion 422 which are different in shape, the first reinforcing portion 421 being disposed apart from the second reinforcing portion 422.

[0069] The housing 24 can comprise a shell 22 having an opening and an end cover 21 covering the opening. Alternatively, the housing 24 can also be a one-piece structure. The housing 24 can be a cuboid, a cylinder, a hexagonal prism, etc. An electrode terminal 26 can be disposed on the housing 24, and the tab 40 can be connected to the electrode terminal 26 by welding, clamping, bonding or other means to output the electrical energy of the battery cell 20 to the outside. It can be understood that the position of the tab 40 where it needs to be connected to the electrode terminal 26 is not provided with the reinforcing structure 42.

[0070] The main body portion 25 can be stacked or wound from a pole piece. The tab 40 can be a positive tab 40 or a negative tab 40. The positive tab 40 is connected to the electrode terminal 26 of the positive electrode, and the negative tab 40 is connected to the electrode terminal 26 of the negative electrode. The positive tab 40 and the negative tab 40 can be located on different sides of the main body portion 25 or on the same side.

[0071] The main body portion 25 can be coated with an active material, and the tab 40 is a portion not coated with the active material. For example, the main body portion 25 of the positive electrode can be made of aluminum foil, and the main body portion 25 of the negative electrode can be made of copper foil. The main body portion 25 of the positive electrode can be coated with positive active materials such as lithium cobaltate, lithium manganate, lithium iron phosphate, etc., and the main body portion 25 of the negative electrode can be coated with negative active materials such as graphite, silicon-carbon material, lithium titanate, etc.

[0072] The first reinforcing portion 421 can be rectangular, elliptical or other long strip-shaped, and the second reinforcing portion 422 can be circular or other polygonal. The reinforcing structure 42 can be formed by pressing a roller on the pole piece, for example, a protruding portion with the same shape and size as the first reinforcing portion 421 and the second reinforcing portion 422 is designed on the roller, so that when it is pressed on the pole piece, the protruding first reinforcing portion 421 and the second reinforcing portion 422 are formed correspondingly. In the thickness direction Z of the tab body 41, the projection of the first reinforcing portion 421 and the projection of the second reinforcing portion 422 can not overlap, i.e. there is a spacing distance between the first reinforcing portion 421 and the second reinforcing portion 422.

[0073] The first reinforcing portions 421 and the second reinforcing portions 422 can be provided on the same surface of the tab body 41, or the first reinforcing portions 421 can be provided on one surface and the second reinforcing portions 422 can be provided on another surface. All of the first reinforcing portions 421 or the second reinforcing portions 422 can be provided on the same surface of the tab body 41, or part of the first reinforcing portions 421 or the second reinforcing portions 422 can be provided on the same surface of the tab body 41 and the other part can be provided on another surface.

[0074] In the above scheme, by providing the first reinforcing portions 421 and the second reinforcing portions 422 with different shapes on the tab body 41, the tab 40 can resist more directions of force and is more stable, thereby improving the reliability of the battery monomer 20. Moreover, the first reinforcing portions 421 and the second reinforcing portions 422 are provided in an interval, which can increase the setting area of the reinforcing ribs, further improve the strength of the tab 40, reduce the position of deformation of the tab 40, and also increase the current conduction area of the tab 40, improve the energy efficiency of the battery monomer 20, and improve the reliability of the battery.

[0075] In some embodiments, the reinforcing structure 42 includes at least one first reinforcing portion 421 and at least one second reinforcing portion 422, the first reinforcing portion 421 and the second reinforcing portion 422 are provided in an interval along a first direction X, a plurality of reinforcing structures 42 are provided in an interval along a second direction Y along the second direction Y, wherein the first direction X and the second direction Y are provided in an intersection, and the first direction X and the second direction Y are both perpendicular to the thickness direction Z of the tab body 41.

[0076] The first direction X can be a direction in which the tab 40 points to the body 25, i.e., a longitudinal direction. The second direction Y can be a direction perpendicular to the first direction X, such as a transverse direction.

[0077] The first reinforcing portions 421 and the second reinforcing portions 422 can be arranged to form a reinforcing column 45 along the first direction. For example, the first reinforcing portion 421 can be a linear shape such as an oblong shape, an elliptical shape, or other long strip shape, and the second reinforcing portion 422 can be a dot shape such as a circular shape or other polygonal shape, i.e., the shape of the first reinforcing portion 421 is relatively longer than the shape of the second reinforcing portion 422.

[0078] In the above scheme, by providing a plurality of reinforcing columns 45, the first reinforcing portions 421 and the second reinforcing portions 422 are arranged more dispersedly and uniformly, thereby further improving the strength and stability of the tab 40.

[0079] In some embodiments, the first reinforcing portions 421 and the second reinforcing portions 422 are provided in an interval along the first direction X.

[0080] A first reinforcing portion 421 and a second reinforcing portion 422 are arranged in sequence along the first direction X, but there is a gap between the first reinforcing portion 421 and the second reinforcing portion 422.

[0081] In the above scheme, by alternately arranging the first reinforcing portion 421 and the second reinforcing portion 422 along the first direction X, the reinforcing ribs of different shapes can be more evenly distributed along the first direction X, and the phenomenon of the tab 40 being folded and deformed along the second direction Y can be reduced.

[0082] In some embodiments, the first reinforcing portion 421 and the second reinforcing portion 422 are arranged alternately along the second direction Y.

[0083] A first reinforcing portion 421 and a second reinforcing portion 422 are arranged in sequence along the second direction Y, but there is a gap between the first reinforcing portion 421 and the second reinforcing portion 422.

[0084] In the above scheme, by alternately arranging the first reinforcing portion 421 and the second reinforcing portion 422 along the second direction Y, the reinforcing ribs of different shapes can be more evenly distributed along the second direction Y, and the phenomenon of the tab 40 being folded and deformed along the first direction X can be reduced.

[0085] In some embodiments, in the reinforcing structures 42 adjacent along the second direction Y, the first reinforcing portion 421 is arranged in staggered manner.

[0086] That is, the first reinforcing portion 421 of the reinforcing columns 45 adjacent along the second direction Y is arranged in staggered manner. For example, the first reinforcing portion 421 of the first column is not arranged in alignment with the first reinforcing portion 421 of the second column, but is arranged in staggered manner. The first reinforcing portion 421 can be a linear shape such as an oblong, an ellipse or other long strip shape, and the second reinforcing portion 422 can be a point shape such as a circle or other polygon, that is, the first reinforcing portion 421 is relatively longer than the second reinforcing portion 422. By arranging the longer first reinforcing portion 421 in staggered manner, the gap between the first reinforcing portion 421 of the adjacent reinforcing columns 45 can be reduced.

[0087] In the above scheme, by arranging the adjacent reinforcing columns 45 in staggered manner, the first reinforcing portion 421 arranged in staggered manner on the adjacent reinforcing columns 45 can resist the force along the second direction Y, so that the utilization rate of the first reinforcing portion 421 can be improved.

[0088] Figure 6 is a partial schematic view of a tab according to some embodiments of the present application; Figure 7 is a partial schematic view of a tab according to some other embodiments of the present application.

[0089] In some embodiments, such as Figure 6 As shown, the first reinforcing part 421 includes a first end 423 and a second end 424 disposed opposite to each other along the first direction X. In the adjacent reinforcing structures 42 along the second direction Y, the first end 423 of one row of first reinforcing parts 421 and the second end 424 of the misaligned first reinforcing parts 421 are flush with each other; or, as shown... Figure 7 As shown, along the second direction Y, the projection of one column of the first reinforcing part 421 overlaps with the projection of another column of the first reinforcing part 421 that is misaligned.

[0090] In adjacent reinforcing columns 45, the first end 423 of the first reinforcing part 421 in one column is flush with the second end 424 of the first reinforcing part 421 in another column that is misaligned. When the first end 423 of the first reinforcing part 421 in one column is flush with the second end 424 of the first reinforcing part 421 in another column that is misaligned, the two misaligned first reinforcing parts 421 have no gap along the first direction X. When the projection of the first reinforcing part 421 in one column overlaps with the projection of the first reinforcing part 421 in another column that is misaligned, the two misaligned first reinforcing parts 421 not only have no gap along the first direction X, but also partially overlap.

[0091] In the above scheme, by further reducing the gap of the first reinforcing part 421 of the adjacent reinforcing column 45 misaligned along the first direction X, it is ensured to a certain extent that the tab 40 will not be folded or deformed between the misaligned first reinforcing parts 421 of the adjacent reinforcing column 45.

[0092] Figure 8 This is a schematic diagram of the tab structure of some other embodiments of this application.

[0093] like Figure 8 As shown, in some embodiments, the lengths of the first reinforcing portions 421 in at least two rows of reinforcing structures 42 are not consistent along the first direction X.

[0094] When two first reinforcing parts 421 are arranged sequentially along the first direction X, the two first reinforcing parts 421 can be connected together to form a longer first reinforcing part 421, so that the lengths of the first reinforcing parts 421 in different reinforcing columns 45 can be different.

[0095] In the above scheme, by setting first reinforcing parts 421 of different lengths in different reinforcing columns 45, the number of second reinforcing parts 422 can be increased as needed. The stability and strength of the tab 40 can be improved by the cooperation of reinforcing ribs of different shapes and sizes.

[0096] In some embodiments, the first reinforcing part 421 is rectangular or elliptical, and the second reinforcing part 422 is circular or polygonal.

[0097] In the above scheme, by matching the longer first reinforcing portion 421 with the circular or polygonal second reinforcing portion 422, the stability and strength of the tab 40 can be further improved.

[0098] In some embodiments, the area of the second reinforcing portion 422 is S1, and the area of the first reinforcing portion 421 is S2, and S1 / S2 satisfies: 0.1≤S1 / S2≤10.

[0099] S1 / S2 can be any value between 0.1 and 10. For example, S1 / S2 can be 0.1, 1, 2, 4, 5, 7, 8, or 10, etc.

[0100] It should be noted that the area S2 of the first reinforcing portion 421 and the area S1 of the second reinforcing portion 422 respectively refer to the projected area of the first reinforcing portion 421 along the thickness direction Z of the tab body 41.

[0101] In the above scheme, by limiting S1 / S2 within a suitable range, the effects of the first reinforcing portion 421 and the second reinforcing portion 422 can be considered, so that the tab 40 can balance the force in each direction.

[0102] In some embodiments, S1 / S2 satisfies: 1≤S1 / S2≤2.

[0103] In the above scheme, by further limiting the range of S1 / S2, the tab 40 can more evenly resist the force in each direction, thereby reducing the deformation of each position of the tab 40.

[0104] In some embodiments, the tab 40 includes a first side 43 and a second side 44 arranged opposite to each other, the first side 43 is closer to the main body portion 25 than the second side 44, and the width of the first side 43 is greater than the width of the second side 44; at least in the area close to the second side 44, the first reinforcing portion 421 or the second reinforcing portion 422 is arranged.

[0105] The first side 43 is the side of the tab 40 connected to the main body portion 25, and the second side 44 is the side away from the main body portion 25. The tab 40 can be trapezoidal or other shapes.

[0106] Since the second side 44 is away from the main body portion 25, it is a free end, and is more likely to deform, such as folding.

[0107] In the above scheme, by setting the width of the tab 40 close to the first side 43 of the main body 25 to be greater than the width of the second side 44, the flow area at the connection between the tab 40 and the main body 25 can be increased, thereby improving the flow capacity at this location and improving safety. In addition, by providing the first reinforcing portion 421 or the second reinforcing portion 422 at least in the region close to the second side 44, the stability of the location where the tab 40 is more likely to be deformed by folding can be improved.

[0108] Figure 9 is a side view of a tab according to some embodiments of the present application.

[0109] As shown in some embodiments, the tab body 41 includes oppositely arranged first and second surfaces 411 and 412, and part of the first and second reinforcing portions 421 and 422 are convexly arranged towards the first surface 411, and the other part is convexly arranged towards the second surface 412. Figure 9

[0110] For example, part of the first and second reinforcing portions 421 and 422 are arranged on the upper surface of the tab body 41, and the other part is arranged on the lower surface of the tab body 41.

[0111] In the above scheme, by arranging reinforcing ribs on both the first and second surfaces 411 and 412 of the tab body 41, the stability of the tab 40 can be improved.

[0112] In some embodiments, the first reinforcing portion 421 is convexly arranged towards the first surface 411, and the second reinforcing portion 422 is convexly arranged towards the second surface 412.

[0113] The preparation of the first reinforcing portion 421 of the first surface 411 can be completed by pressing with one press roller, and the preparation of the second reinforcing portion 422 of the second surface 412 can be completed by pressing with another press roller.

[0114] In the above scheme, by arranging reinforcing ribs of different shapes on different surfaces, the press roller corresponding to the first reinforcing portion 421 and the press roller corresponding to the second reinforcing portion 422 can respectively complete the pressing, thereby improving the preparation efficiency of the tab 40.

[0115] In a second aspect, the embodiments of the present application provide a battery device 100, which includes the battery monomer 20 of any of the above embodiments.

[0116] In a third aspect, the embodiments of the present application provide a power consuming device, which includes the battery device 100 described above, and the battery device 100 is used to provide electric energy.

[0117] ​According to some embodiments of the present application, the present application provides a battery cell 20, the battery cell 20 comprising a housing 24 and an electrode assembly 23, the electrode assembly 23 being disposed inside the housing 24, the electrode assembly 23 comprising a main body portion 25 and a tab 40 extending from an end of the main body portion 25, the tab 40 comprising a tab body 41 and a reinforcing structure 42 disposed on the tab body 41, the reinforcing structure 42 comprising a first reinforcing portion 421 and a second reinforcing portion 422 which are different in shape; the first reinforcing portion 421 and the second reinforcing portion 422 are spaced apart. The reinforcing structure 42 comprises at least one first reinforcing portion 421 and at least one second reinforcing portion 422, in the first direction X, the first reinforcing portion 421 and the second reinforcing portion 422 are spaced apart; in the second direction Y, a plurality of reinforcing structures 42 are spaced apart along the second direction Y; wherein the first direction X and the second direction Y are intersected, and the first direction X and the second direction Y are both perpendicular to the thickness direction Z of the tab body 41.

[0118] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized by, The battery cell comprises: a shell; an electrode assembly arranged inside the shell, the electrode assembly comprising a main body and a tab extending from an end of the main body, the tab comprising a tab body and a reinforcing structure arranged on the tab body, the reinforcing structure comprising a first reinforcing part and a second reinforcing part which are different in shape; the first reinforcing part and the second reinforcing part are arranged in an interval.

2. The battery cell of claim 1, wherein, The reinforcing structure comprises at least one first reinforcing part and at least one second reinforcing part, the first reinforcing part and the second reinforcing part are arranged in an interval along a first direction; a plurality of reinforcing structures are arranged in an interval along a second direction; wherein the first direction and the second direction are arranged in an intersection, and the first direction and the second direction are perpendicular to the thickness direction of the tab body.

3. The battery cell of claim 2, wherein, The first reinforcing part and the second reinforcing part are arranged in an alternation along the first direction.

4. The battery cell of claim 2, wherein, The first reinforcing part and the second reinforcing part are arranged in an alternation along the second direction.

5. The battery cell of claim 2, wherein, In the reinforcing structures adjacent along the second direction, the first reinforcing part is arranged in a staggered manner.

6. The battery cell of claim 5, wherein, The first reinforcing part comprises a first end and a second end arranged in an opposite direction along the first direction, in the reinforcing structures adjacent along the second direction, the first end of the first reinforcing part of one column and the second end of the staggered first reinforcing part are flush with each other; or, in the second direction, the projection of the first reinforcing part of one column and the projection of the staggered first reinforcing part of another column overlap with each other.

7. The battery cell of claim 2, wherein, The lengths of the first reinforcing parts in at least two columns of the reinforcing structures along the first direction are inconsistent.

8. The battery cell of claim 1, wherein, The first reinforcing part is rectangular or elliptical, and the second reinforcing part is circular or polygonal.

9. The battery cell of any one of claims 1-8, wherein, The area of the second reinforcing part is S1, and the area of the first reinforcing part is S2, and the S1 and the S2 satisfy: 0.1≤S1 / S2≤10.

10. The battery cell of claim 9, wherein, The S1 and the S2 satisfy: 1≤S1 / S2≤2.

11. The battery cell of any one of claims 1-10, wherein, The tab comprises a first side and a second side arranged in an opposite direction, the first side is closer to the main body than the second side, and the width of the first side is greater than the width of the second side; At least in the area close to the second side, the first reinforcing part or the second reinforcing part is arranged.

12. The battery cell of any one of claims 1-11, wherein, The tab body comprises a first surface and a second surface arranged in an opposite direction, part of the first reinforcing part and the second reinforcing part is arranged protruding to the first surface, and another part is arranged protruding to the second surface.

13. The battery cell of claim 12, wherein, The first reinforcing part is arranged protruding to the first surface, and the second reinforcing part is arranged protruding to the second surface.

14. A battery device characterized by comprising: The battery device comprises the battery cell according to any one of claims 1-13.

15. An electrical device, comprising: The battery device is used for providing electric energy.

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