Pole group assembly and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a pole group assembly and a battery monomer, the pole group assembly comprises a pole group row and a supporting element, the pole group row comprises at least two pole groups, the at least two pole groups are arranged along the length direction of the pole groups and are in conductive connection, one ends of every two adjacent pole groups facing each other extend to form pole lugs, and the pole groups are arranged in the pole group row. One supporting element is correspondingly arranged between every two adjacent pole groups, each supporting element comprises a supporting part and an overturning part, each supporting part is clamped between every two adjacent pole groups, the overturning parts are connected with the supporting parts in an overturning manner, and the pole lugs are clamped between the overturning parts and the supporting parts. And the yield of the battery monomers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a pole group component and a battery monomer. Background Art

[0002] Lithium-ion batteries typically include a housing and an electrode group, with the electrode group disposed within the housing. As market demand for the capacity of lithium-ion batteries gradually increases, technologies for extending the length of the electrode group to increase the capacity of lithium-ion batteries have gradually attracted attention.

[0003] However, extending the length of the electrode group will increase the difficulty of producing the electrode group. When the longer electrode group is installed in the battery shell, the electrode group is prone to bending and deformation due to its heavy weight and soft texture, thereby reducing the yield rate of the battery product.

[0004] Therefore, there is an urgent need to provide a pole group assembly and a battery cell to solve the above technical problems. Utility Model Content

[0005] The first object of the present invention is to provide a pole group assembly, which has a high capacity, a simple production process, and is also conducive to improving the yield rate of battery cells.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Electrode assembly, including:

[0008] The pole group row includes at least two pole groups, the at least two pole groups are arranged along a first direction and are conductively connected, the first direction is the length direction of the pole group, and pole ears extend from one end of each of the two adjacent pole groups facing each other;

[0009] There is a supporting element between each two adjacent pole groups. The supporting element includes a supporting part and a flipping part. The supporting part is clamped between the two adjacent pole groups. The flipping part and the supporting part can be flipped and connected. The pole ear is clamped between the flipping part and the supporting part.

[0010] Optionally, an axis along which the turning portion turns relative to the supporting portion is parallel to the first direction.

[0011] Optionally, the pole group assembly also includes a side plate structure, which includes two side plates, which are respectively located on two opposite side walls of the pole group. The two opposite ends of the pole group in the first direction are respectively the first end and the second end, and the side plate extends from the first end to the second end.

[0012] Optionally, both side panels are connected to the support portion.

[0013] Optionally, protrusions are provided on both opposite sides of the support portion, and clamping holes are provided on both side panels, and the protrusions are clamped in a corresponding clamping hole.

[0014] Optionally, the side panel structure further includes a connecting plate, one end of each of the two side panels in the first direction is connected to the connecting plate, and the connecting plate is in contact with the surface of the first end.

[0015] Optionally, the pole group assembly further includes a push plate, which is in contact with the surface of the second end, and the orthographic projection of the push plate on the surface of the second end is equal to the area of the second end surface.

[0016] Optionally, the side plate is detachably connected to the push plate.

[0017] Optionally, a limit block is provided at one end of the side plate facing the push plate, and the limit block abuts against a side of the side plate away from the second end.

[0018] The second object of the present invention is to provide a battery cell having high capacity and good yield and a simple production process.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] The battery cell comprises a battery shell, a cover plate assembly and the above-mentioned electrode group assembly. The electrode group assembly is arranged in the battery shell, and the cover plate assembly is covered at the opening of the battery shell.

[0021] Beneficial effects of the utility model:

[0022] The electrode assembly provided by the present invention includes an electrode array and a support element. The electrode array includes at least two electrode groups arranged along the length of the electrode array and conductively connected. There is a corresponding support element between each two adjacent electrode groups. The support portion of the support element is sandwiched between the two adjacent electrode groups, thereby improving the overall structural strength of the electrode array. When the electrode array assembly is installed in a battery shell, the support portion can provide support force to the electrode groups on both sides, preventing the electrode groups on both sides from bending and deforming, thereby improving the yield rate of battery cells. Secondly, the electrode array includes more than two conductively connected electrode groups, so that the electrode array has a higher capacity, which is conducive to improving the capacity of the battery cells. Thirdly, the flip portion of the support element is flip-connected to the support portion, and the electrode tabs extending from one end of the two adjacent electrode groups facing each other are sandwiched between the flip portion and the support portion. This can not only protect the electrode tabs and improve the yield rate of the battery cells, but also simplify the assembly process of the support element and the electrode array, reducing the difficulty of producing the electrode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly structure of the electrode group component and the cover plate component;

[0024] Figure 2 This is a schematic diagram of the assembly structure of the electrode group assembly and the cover plate assembly when one of the electrode groups is not shown;

[0025] Figure 3 yes Figure 2 A local enlarged view of point A in FIG;

[0026] Figure 4 is a schematic structural diagram of the support element when the flip portion is not engaged with the support portion;

[0027] Figure 5 is a schematic structural diagram of the support element after the flip portion and the support portion are buckled together;

[0028] Figure 6 It is a schematic diagram of the assembly structure of the support element, the side plate structure and the push plate;

[0029] Figure 7 It is a structural diagram of the side panel structure;

[0030] Figure 8 It is a partial enlarged structural diagram of the side plate, limit block and push plate;

[0031] Figure 9 It is a structural diagram of the push plate;

[0032] Figure 10 It is a structural diagram of the battery shell;

[0033] Figure 11 It is a schematic diagram of the partial cross-sectional structure of the battery shell;

[0034] Figure 12 1. It is a structural diagram of the cover assembly;

[0035] Figure 13 It is a schematic diagram of the structure of the insulating film.

[0036] In the picture:

[0037] 100, pole group row; 110, pole group; 111, pole ear; 121, first end; 122, second end; 200, support element; 210, support portion; 211, protrusion; 220, flip portion; 221, through groove; 310, side plate; 311, clamping hole; 312, limit block; 320, connecting plate; 400, push plate; 410, clamping slot;

[0038] 10. Battery case; 11. Opening; 12. First explosion-proof valve; 13. Explosion-proof hole; 14. Protective sticker; 20. Cover assembly; 21. Cover body; 22. Boss; 23. Second explosion-proof valve; 30. Insulating film; 31. Slit;

[0039] D1, first direction. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0041] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0044] This embodiment provides a pole group assembly, which has a high capacity, a relatively simple production process, and is also conducive to improving the yield rate of battery cells.

[0045] Specifically, if Figures 1 to 5As shown, the pole group assembly includes a pole group row 100 and a support element 200, wherein the pole group row 100 includes at least two pole groups 110, and the at least two pole groups 110 are arranged along a first direction D1 and conductively connected. The first direction D1 is the length direction of the pole group 110, and pole ears 111 extend from one end of each two adjacent pole groups 110 facing each other. There is a corresponding support element 200 between each two adjacent pole groups 110, and the support element 200 includes a supporting portion 210 and a flipping portion 220. The supporting portion 210 is clamped between the two adjacent pole groups 110, and the flipping portion 220 and the support portion 210 can be flipped and connected. The pole ear 111 is clamped between the flipping portion 220 and the support portion 210.

[0046] The electrode group assembly provided in this embodiment includes an electrode group row 100 and a support element 200. The electrode group row 100 includes at least two electrode groups 110 arranged along the length direction of the electrode group 110 and conductively connected. There is a corresponding support element 200 between each two adjacent electrode groups 110. The support portion 210 of the support element 200 is clamped between the two adjacent electrode groups 110, thereby improving the overall structural strength of the electrode group row 100. When the electrode group assembly is installed in the battery shell 10, the support portion 210 can provide support force to the electrode groups 110 on both sides thereof, preventing the electrode groups 110 on both sides from bending and deformation, thereby having the effect of improving the yield rate of the battery cells.

[0047] Secondly, the electrode group row 100 includes two or more conductively connected electrode groups 110, so that the electrode group row 100 has a higher capacity, which is beneficial to improving the capacity of the battery cell.

[0048] Again, the flipping portion 220 of the support element 200 is flipped and connected to the support portion 210, and the pole ears 111 extending from one end of the two adjacent pole groups 110 facing each other are clamped between the flipping portion 220 and the support portion 210, which can not only protect the pole ears 111 and improve the yield rate of the battery cell, but also simplify the assembly process of the support element 200 and the pole group row 100 and reduce the production difficulty of the pole group assembly.

[0049] like Figure 1 As shown, the number of the electrode groups 110 in this embodiment is two. Of course, in other implementations, the number of the electrode groups 110 may be three, four, or five.

[0050] Furthermore, the axis of the flipping portion 220 flipping relative to the support portion 210 is parallel to the first direction D1. In the two adjacent pole groups 110, the pole ear 111 of one extends toward the other, and then the flipping portion 220 is flipped to clamp the pole ear 111 between the flipping portion 220 and the support portion 210. It can be seen that this structural design can clamp the pole ear 111 between the flipping portion 220 and the support portion 210 without bending the pole ear 111, which has the effect of simplifying the assembly process of the support element 200 and the pole group array 100. Moreover, in the two adjacent pole groups 110, the structure in which the pole ear 111 of one extends toward the other makes the pole ear 111 roughly a sheet-like structure. Compared with the bent pole ear 111, the sheet-like pole ear 111 can save its length dimension, thereby reducing the overall volume of the pole group array 100.

[0051] In this embodiment, the two pole ears 111 sandwiched between the flip portion 220 and the support portion 210 are fixedly connected by a horizontal welding process. This method of directly connecting the pole ears 111 to the pole ears 111 eliminates conductive elements such as connecting bars, which not only reduces the number of parts of the pole group assembly, but also reduces the internal resistance between the two adjacent pole groups 110.

[0052] Alternatively, as Figures 1 to 5 As shown, a through slot 221 is provided on the side of the flip portion 220 facing the support portion 210. The axis of the through slot 221 is parallel to the first direction D1. The tab 111 is clamped between the bottom of the through slot 221 and the support portion 210. The design of the through slot 221 provides an accommodating space for the tab 111, which can avoid pinching the tab 111.

[0053] In this embodiment, each pole group 110 has two pole ears 111 extending from one side toward the other pole group 110 adjacent thereto, that is, there are four pole ears 111 between two adjacent pole groups 110. Therefore, each support portion 210 is provided with two flip portions 220, and two pole ears 111 are sandwiched between each flip portion 220 and the support portion 210. Moreover, one end of the flip portion 220 is a flip end that can be flipped and connected to the support portion 210, and the other end is a snap-fit end that can be snapped onto the support portion 210. The snap-fit ends of the two flip portions 220 on the same support portion 210 are arranged facing each other. Of course, in other embodiments, each pole group 110 can also have a pole ear 111 extending from one side toward the other pole group 110 adjacent thereto, that is, there are two pole ears 111 between two adjacent pole groups 110. In this case, only one flip portion 220 is required on each support portion 210.

[0054] Alternatively, as Figure 5As shown, the width of the flip end is a, 0.2mm<a<2.0mm. For example, a can be 0.2mm, 0.25mm, 1.0mm, 1.5mm or 2.0mm, etc., so that the flip end has a certain structural strength and is not prone to breakage. It also allows the flip part 220 to be flipped more easily.

[0055] At present, most battery cases are made of metal materials with thin walls. Therefore, the opening of the battery case is relatively sharp. When the electrode assembly is installed in the battery case, the side wall of the electrode assembly is easily scratched at the opening of the battery case, thereby reducing the yield rate of the battery cell. To solve this technical problem, Figures 1 to 5 As shown, the electrode group assembly also includes a side plate structure, which includes two side plates 310. The two side plates 310 are respectively located on two opposite side walls of the electrode group 110. The two opposite ends of the electrode group row 100 in the first direction D1 are respectively a first end 121 and a second end 122. The side plate 310 extends from the first end 121 to the second end 122. The side plate 310 plays a good protective role on the side wall of the electrode group 110, reducing the chance of the side wall of the electrode group 110 being scratched when the electrode group assembly is installed in the battery shell 10, thereby improving the yield rate of the battery cell.

[0056] Optionally, the thickness of the side panel 310 is b, 0.4mm<b<3.5mm. For example, b can be 0.4mm, 0.5mm, 2.0mm, 3.0mm or 3.5mm, etc., to save space as much as possible while ensuring that the side panel 310 has a certain structural strength.

[0057] Optionally, both side plates 310 are connected to the support portion 210 , and the support portion 210 can limit the side plates 310 to prevent the longer side plates 310 from tilting on the side wall of a certain pole group 110 .

[0058] Furthermore, if Figures 1 to 7 As shown, protrusions 211 are provided on both opposite sides of the support portion 210, and a card hole 311 is provided on each of the two side panels 310. The protrusion 211 is carded in a corresponding card hole 311 to achieve the connection between the support portion 210 and the side panel 310. In addition, the structure of the protrusion 211 carded in the card hole 311 is simple and easy to disassemble and assemble, which is conducive to simplifying the disassembly and assembly process of the side panel 310 and the support element 200.

[0059] In other embodiments, the support portion 210 and the side panel 310 may also be connected through other structures. For example, a slot 410 is provided on the support portion 210, and a spring block is provided on the side of the side panel 310 facing the support portion 210, and the spring block is stuck in the slot 410; or, the support portion 210 and the side panel 310 may also be connected by bonding or other methods, which are not listed here one by one.

[0060] Alternatively, as Figures 1 to 7 As shown, the side panel structure also includes a connecting plate 320. One end of the two side panels 310 in the first direction D1 is connected to the connecting plate 320. The connecting plate 320 is fitted with the surface of the first end 121 to further limit the two side panels 310 and prevent the two side panels 310 from tilting.

[0061] Alternatively, as Figures 1 to 7 As shown, the electrode assembly further includes a push plate 400, which is in contact with the surface of the second end 122, and the orthographic projection of the push plate 400 on the surface of the second end 122 is equal to the area of the surface of the second end 122. When the electrode assembly is installed into the battery shell 10, the first end 121 can be directed toward the opening 11 of the battery shell 10, and then the push plate 400 is pushed to push the electrode assembly into the battery shell 10. In the above process, the push plate 400 is in surface contact with the surface of the second end 122 of the electrode array 100, and the orthographic projection of the push plate 400 on the surface of the second end 122 is equal to the area of the surface of the second end 122. Therefore, when the push plate 400 is pushed, the push plate 400 can disperse the thrust to the surface of the second end 122, thereby avoiding the problem of damage to the surface of the second end 122 due to excessive local pressure.

[0062] Furthermore, the side panels 310 and the push plate 400 are detachably connected, and the two side panels 310 are limited at the second end 122 of the electrode array 100 to prevent the side panels 310 from tilting. In addition, the structure connecting the side panels 310 and the push plate 400 can further improve the force balance of the electrode array 100 when the electrode assembly is pushed into the battery shell 10, thereby reducing the probability of bending and deformation of the electrode array 110.

[0063] Furthermore, if Figures 1 to 8 As shown, a stopper 312 is provided on one end of the side panel 310 facing the push plate 400. The stopper 312 abuts against the side of the side panel 310 facing away from the second end 122, so that the push plate 400 is clamped between the stopper 312 and the surface of the second end 122, thereby achieving the connection between the side panel 310 and the push plate 400. To disassemble, the stopper 312 is gently moved in a direction away from the second end 122 to remove the push plate 400 from between the stopper 312 and the surface of the second end 122.

[0064] Furthermore, if Figures 1 to 9 As shown, there are card slots 410 on the opposite sides of the push plate 400. The two card slots 410 correspond one-to-one to the two side plates 310. Each side plate 310 is clamped in a corresponding card slot 410. On the one hand, it can save space, and on the other hand, it can improve the reliability of the connection between the side plate 310 and the push plate 400.

[0065] In this embodiment, the support element 200, the side plate 310, the connecting plate 320 and the push plate 400 are all components with insulating properties such as injection molding parts. For example, they can be made using more mature processes in the field such as injection molding or die cutting.

[0066] This embodiment also provides a battery cell, which includes a battery case 10, a cover plate assembly 20, and the aforementioned electrode group assembly. The electrode group assembly is disposed within the battery case 10, and the cover plate assembly 20 covers the opening 11 of the battery case 10. This battery cell, which utilizes the aforementioned electrode group assembly, not only has a high electrical capacity, but also has a relatively simple production process and a high yield rate.

[0067] like Figure 10 The figure shows a schematic structural diagram of the battery shell 10 provided in this embodiment. The battery shell 10 is provided with openings 11 at both opposite ends in the first direction D1. There are two cover plate assemblies 20, and the two cover plate assemblies 20 are respectively covered at a corresponding opening 11.

[0068] Furthermore, if Figure 10 As shown, a first explosion-proof valve 12 is provided on the battery shell 10, and there is a first explosion-proof valve 12 between each two adjacent electrode groups 110. In this embodiment, there are two electrode groups 110, so there is one first explosion-proof valve 12, and the first explosion-proof valve 12 is roughly located in the middle position of the battery shell 10 in the first direction D1.

[0069] Furthermore, if Figure 11 As shown, an explosion-proof hole 13 is provided on the battery shell 10, and a protective sticker 14 is provided on the inner wall of the battery shell 10, and the protective sticker 14 is attached to the edge of the explosion-proof hole 13, and the first explosion-proof valve 12 is installed on the hole wall of the explosion-proof hole 13. The protective sticker 14 can protect the first explosion-proof valve 12 and prevent the internal components of the battery shell 10 from colliding with the first explosion-proof valve 12.

[0070] Alternatively, as Figure 12As shown, the cover plate assembly 20 includes a cover plate body 21, which is made of a conductive material such as a plain aluminum plate. The cover plate body 21 covers the opening 11 of the battery shell 10. The side of the cover plate body 21 facing the electrode array 100 is welded to the electrode tab 111 at the end of the electrode array 100, so that the electrode array 100 is electrically connected to the cover plate body 21 through the electrode tab 111. In addition, because the connecting plate 320 and the push plate 400 are both insulating parts, the connecting plate 320 and the push plate 400 can prevent the cover plate body 21 from short-circuiting with the electrode array 110. A boss 22 is provided on the side of the cover plate body 21 facing away from the electrode array 100. The boss 22 is used to connect to other conductive elements outside the battery cell. This structural design can simplify the overall structure of the cover plate assembly 20, eliminating conventional cover plate parts such as the electrode column, upper plastic, and lower plastic, thereby improving space utilization and reducing production costs.

[0071] Furthermore, if Figure 12 As shown, a second explosion-proof valve 23 is provided on the cover body 21, so that the high-pressure gas in the battery shell 10 can be discharged not only from the first explosion-proof valve 12 located in the middle position of the battery shell 10, but also from the second explosion-proof valve 23 located at the end of the battery shell 10, shortening the flow path of the high-pressure gas and increasing the exhaust volume, which has the effect of improving the exhaust efficiency, thereby improving the safety of the battery cell.

[0072] Optionally, the thickness of the cover body 21 is c (not shown in the figure), 1.0mm<c<3.5mm. For example, c can be 1.0mm, 1.5mm, 2.0mm, 3.0mm or 3.5mm, etc., to minimize the volume of the cover body 21 while ensuring that the cover body 21 has a certain structural strength.

[0073] The height of the boss 22 protruding from the surface of the cover body 21 is d (not shown in the figure), 1.0mm<d<3.5mm. For example, d can be 1.0mm, 1.5mm, 2.0mm, 3.0mm or 3.5mm, etc., to minimize the volume of the boss 22 while ensuring that the boss 22 has a certain structural strength.

[0074] Alternatively, as Figure 13 As shown, the battery cell further includes an insulating film 30, which wraps around the outside of the electrode assembly 100, that is, the insulating film 30 is sandwiched between the outer wall of the electrode assembly 110 and the side plate 310. Furthermore, a slit 31 is provided in the insulating film 30, which corresponds to the position of the first explosion-proof valve 12, allowing high-pressure gas inside the electrode assembly 110 to break through the slit 31 and quickly reach the first explosion-proof valve 12.

[0075] Furthermore, the thickness of the insulating film 30 is e, 0.05 mm < e < 0.3 mm. For example, e can be 0.05 mm, 0.1 mm, 0.2 mm or 0.3 mm, etc., to save space as much as possible while ensuring the insulating effect of the insulating film 30.

[0076] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pole group assembly, characterized in that: include: A pole group row (100), the pole group row (100) comprising at least two pole groups (110), the at least two pole groups (110) being arranged along a first direction (D1) and conductively connected, the first direction (D1) being the length direction of the pole groups (110), and pole ears (111) extending from one end of each of the two adjacent pole groups (110) facing each other; A support element (200) is provided between each two adjacent pole groups (110). The support element (200) comprises a support portion (210) and a flip portion (220). The support portion (210) is arranged between the two adjacent pole groups (110). The flip portion (220) is flipably connected to the support portion (210). The pole lug (111) is arranged between the flip portion (220) and the support portion (210).

2. The pole group assembly according to claim 1, characterized in that: The axis along which the turning portion (220) turns relative to the supporting portion (210) is parallel to the first direction (D1).

3. The pole group assembly according to claim 1 or 2, characterized in that: The pole group assembly further includes a side plate structure, the side plate structure including two side plates (310), the two side plates (310) are respectively located on two opposite side walls of the pole group (110), the opposite ends of the pole group row (100) in the first direction (D1) are respectively a first end (121) and a second end (122), and the side plate (310) extends from the first end (121) to the second end (122).

4. The pole group assembly according to claim 3, characterized in that: The two side panels (310) are both connected to the support portion (210).

5. The pole group assembly according to claim 3, characterized in that: The supporting portion (210) is provided with protrusions (211) on both opposite sides, and the two side plates (310) are provided with clamping holes (311), and the protrusions (211) are clamped in a corresponding one of the clamping holes (311).

6. The pole group assembly according to claim 3, characterized in that: The side panel structure further comprises a connecting plate (320), one end of each of the two side panels (310) in the first direction (D1) is connected to the connecting plate (320), and the connecting plate (320) is in contact with the surface of the first end (121).

7. The pole group assembly according to claim 3, characterized in that: The pole group assembly further includes a push plate (400), the push plate (400) is in contact with the surface of the second end (122), and the orthographic projection of the push plate (400) on the surface of the second end (122) is equal to the area of the surface of the second end (122).

8. The pole group assembly according to claim 7, characterized in that: The side plate (310) and the push plate (400) are detachably connected.

9. The pole group assembly according to claim 7, characterized in that: A limit block (312) is provided at one end of the side plate (310) facing the push plate (400), and the limit block (312) abuts against a side of the side plate (310) facing away from the second end (122).

10. A battery cell, characterized in that The invention comprises a battery shell (10), a cover plate assembly (20) and a pole group assembly according to any one of claims 1 to 9, wherein the pole group assembly is arranged in the battery shell (10), and the cover plate assembly (20) is arranged to cover the opening (11) of the battery shell (10).

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