Battery cover plate and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a battery monomer, the battery cover plate comprises a cover plate body, a pressing block, a pole column, a first positioning structure and a sealing element, the cover plate body is provided with a mounting hole, the pressing block is arranged on the cover plate body, the pressing block is provided with a first movable hole, the pole column comprises a bottom plate and a column body which are connected with each other, the bottom plate is located on the side, away from the pressing block, of the cover plate body, the column body is movably arranged in the mounting hole and the first movable hole, the first positioning structure is used for locking the column body in the first movable hole, the sealing piece comprises a first sealing section, and the first sealing section is arranged on the column body in a sleeving mode and pressed between the bottom plate and the edge of the mounting hole; the battery cover plate has relatively high yield, realizes detachable connection of the cover plate body, the pressing block, the pole and the sealing element, and in addition, the battery cover plate can also adjust the compression amount of the first sealing section.

Description

Technical Field

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

[0002] The battery cover generally includes a cover body, a pole, a rivet block and a sealing ring, wherein the pole is passed through the cover body, the rivet block and the sealing ring, and the pole is riveted and welded to the rivet block.

[0003] When riveting the pole and the rivet block, a large amount of metal wire will be generated, and poor riveting is likely to occur. When welding the pole and the rivet block, oxidation problems are likely to occur due to welding heat. The above problems will reduce the yield rate of the battery cover. In addition, the above structure makes it impossible to repair and disassemble the pole, rivet block and sealing ring when problems occur. Moreover, when the sealing ring is defective or the compression amount of the sealing ring is unreasonable, it cannot be repaired and adjusted, causing the entire battery cover to be directly scrapped.

[0004] Therefore, it is urgent to propose a battery cover and a battery cell to solve the above technical problems. Utility Model Content

[0005] The first object of the present utility model is to provide a battery cover plate, which has a high yield rate and realizes a detachable connection between the cover plate body, the pressing block, the pole and the seal. In addition, the battery cover plate can also adjust the compression amount of the first sealing section.

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

[0007] Battery cover, including:

[0008] The cover body is provided with a mounting hole;

[0009] A pressing block is arranged on the cover body and is provided with a first movable hole;

[0010] The pole comprises a bottom plate and a column, the bottom plate is connected to the column, the bottom plate is located on the side of the cover body away from the pressure block, and the column is movably arranged in the mounting hole and the first movable hole;

[0011] A first positioning structure, the first positioning structure is used to lock the column in the first movable hole;

[0012] The sealing member includes a first sealing section, the first sealing section is sleeved on the column, and the first sealing section is clamped between the bottom plate and the edge of the mounting hole.

[0013] Optionally, the first positioning structure includes a first internal thread and a first external thread that are threadably matched, the first internal thread is arranged on the hole wall of the first movable hole, and the first external thread is arranged on the side wall of the column.

[0014] Optionally, the seal further includes a second sealing segment, which is sleeved on the column and connected to the first sealing segment, and the second sealing segment is clamped between the hole wall of the mounting hole and the side wall of the column.

[0015] Optionally, the battery cover further includes a limiting member connected to the pressing block, a portion of the limiting member is located in the first movable hole, and the limiting member located in the first movable hole abuts against a side of the column away from the bottom plate.

[0016] Optionally, the limiting member is detachably connected to the pressing block.

[0017] Optionally, the battery cover also includes a second positioning structure, and the pressing block is also provided with a second movable hole, the second movable hole is located on the side of the pressing block away from the cover body, and the second movable hole is connected to the first movable hole, the limiting member can be movably arranged in the second movable hole and the first movable hole, and the second positioning structure is used to lock the limiting member in the second movable hole.

[0018] Optionally, the second positioning structure includes a second internal thread and a second external thread that are threadably matched, the second internal thread is arranged on the hole wall of the second movable hole, and the second external thread is arranged on the outer wall of the limiting member.

[0019] Optionally, the first positioning structure includes a first internal thread and a first external thread that are threaded together, the first internal thread is arranged on the hole wall of the first movable hole, the first external thread is arranged on the side wall of the cylinder, and the thread direction of the first external thread is opposite to the thread direction of the second external thread.

[0020] Optionally, the abutment between the limiter and the column is a first abutment portion, and the abutment between the column and the limiter is a second abutment portion. One of the first abutment portion and the second abutment portion is a conical structure, and the other is a groove. The shape of the conical structure is adapted to the groove, and the side wall of the conical structure presses against the inner wall of the groove.

[0021] The second object of the present invention is to provide a battery cell having a high yield rate, wherein the cover body, pressing block, pole and seal of the battery cover are easy to disassemble and assemble, and the compression amount of the seal of the battery cover is adjustable.

[0022] To achieve this purpose, the present invention adopts the following technical solutions:

[0023] The battery cell comprises a battery shell, a battery core and the above-mentioned battery cover plate. The battery core is arranged in the battery shell, and the cover plate body is arranged to cover the opening of the battery shell.

[0024] Beneficial effects of the utility model:

[0025] The battery cover provided by the present invention has a column that is movably arranged in a mounting hole and a first movable hole, a first sealing section that is sleeved on the column and clamped between the bottom plate and the edge of the mounting hole, and a first positioning structure that locks the column in the first movable hole, thereby achieving a detachable connection between the cover body, the pressure block, the terminal column, and the seal. When problems occur with the above components, they can be disassembled and repaired. In addition, the battery cover can lock the column in the first movable hole through the first positioning structure, eliminating the riveting and welding processes, avoiding the problems of generating a large amount of metal wire during riveting, the problem of poor riveting, and the problem of oxidation caused by welding heat. It can be seen that this structural design is conducive to improving the yield rate of the battery cover. Thirdly, the position of the column in the mounting hole and the first movable hole can be adjusted to adjust the compression of the first sealing section. After the compression of the first sealing section is adjusted, the first positioning structure locks the position of the column in the first movable hole to maintain the compression of the first sealing section, solving the problem of directly scrapping the entire battery cover when the compression of the sealing ring is not appropriate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the exploded structure of the battery cover provided by the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the pole provided by the utility model;

[0028] Figure 3 This is a schematic diagram of the cross-sectional structure of the pressing block provided by the utility model;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the battery cover provided by the present utility model;

[0030] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0031] Figure 6 yes Figure 4 A partial enlarged view of point B in the middle;

[0032] Figure 7 It is a structural schematic diagram of the explosion-proof valve provided by the utility model.

[0033] In the picture:

[0034] 100. Cover plate body; 110. Mounting hole; 120. Explosion-proof hole; 121. Protrusion; 200. Pressing block; 210. Pressing block body; 211. First movable hole; 212. Second movable hole; 220. First insulating member; 300. Pole; 310. Bottom plate; 320. Column; 321. First external thread; 322. Second abutting portion; 400. Sealing member; 410. First sealing section; 420. Second sealing section; 500. Limiting member; 510. First abutting portion; 600. Second insulating member; 700. Explosion-proof valve; 710. Valve plate; 720. Sealing and heat-insulating member; 800. Welding ring; 900. Protective sticker. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] This embodiment provides a battery cover plate, which has a high yield rate and realizes detachable connection between the cover plate body, the pressing block, the pole and the seal. In addition, the battery cover plate can also adjust the compression amount of the first sealing section.

[0040] Specifically, if Figures 1 to 5 As shown, the battery cover includes a cover body 100, a pressure block 200, a pole 300, a first positioning structure and a seal 400, wherein the cover body 100 is provided with a mounting hole 110, the pressure block 200 is arranged on the cover body 100, the pressure block 200 is provided with a first movable hole 211, the first movable hole 211 is coaxial with the mounting hole 110, the pole 300 includes a base plate 310 and a column 320, the base plate 310 is connected to the column 320, the base plate 310 is located on the side of the cover body 100 away from the pressure block 200, the column 320 is movably arranged in the mounting hole 110 and the first movable hole 211, the first positioning structure is used to lock the column 320 in the first movable hole 211, the seal 400 includes a first sealing section 410, the first sealing section 410 is sleeved on the column 320, and the first sealing section 410 is clamped between the base plate 310 and the edge of the mounting hole 110.

[0041] Based on the above design, the battery cover provided in this embodiment has a column 320 that can be movably arranged in the mounting hole 110 and the first movable hole 211. The first sealing section 410 is sleeved on the column 320 and clamped between the bottom plate 310 and the edge of the mounting hole 110. The first positioning structure locks the column 320 in the first movable hole 211, thereby realizing the detachable connection of the cover body 100, the pressure block 200, the pole 300 and the seal 400. When problems occur with the above components, they can be disassembled and repaired, thereby achieving the effect of reducing costs. In addition, the detachable connection structure design of the cover body 100, the pressure block 200, the pole 300 and the seal 400 realizes the production process of the above components being produced and reassembled separately, which is conducive to the mass production of battery covers and reducing costs.

[0042] Secondly, the battery cover can lock the column 320 in the first movable hole 211 through the first positioning structure, eliminating the riveting and welding processes, avoiding the problem of generating a large amount of metal wire during riveting, the problem of poor riveting, and the oxidation problem caused by welding heat. It can be seen that this structural design is conducive to improving the yield rate of the battery cover.

[0043] Again, by adjusting the position of the column 320 in the mounting hole 110 and the first movable hole 211, the compression amount of the first sealing section 410 can be adjusted. After the compression amount of the first sealing section 410 is adjusted, the first positioning structure locks the position of the column 320 in the first movable hole 211 to maintain the compression amount of the first sealing section 410, thereby solving the problem of directly scrapping the entire battery cover when the compression amount of the sealing ring is not appropriate, thereby effectively reducing production costs.

[0044] Furthermore, if Figures 1 to 5 As shown, the seal 400 also includes a second sealing section 420, which is sleeved on the column 320 and connected to the first sealing section 410. The second sealing section 420 is clamped between the hole wall of the mounting hole 110 and the side wall of the column 320. In this embodiment, the first sealing section 410 clamped between the bottom plate 310 and the edge of the mounting hole 110 realizes the sealing between the bottom plate 310 and the cover body 100, and the second sealing section 420 clamped between the hole wall of the mounting hole 110 and the side wall of the column 320 realizes the sealing between the column 320 and the cover body 100. The design of the two sealing structures effectively improves the sealing effect of the pole 300 and the cover body 100.

[0045] Alternatively, as Figures 1 to 5 As shown, the first positioning structure includes a first internal thread and a first external thread 321 that are threaded together. The first internal thread is arranged on the hole wall of the first movable hole 211, and the first external thread 321 is arranged on the side wall of the column 320. By screwing the pole 300, the position of the column 320 in the first movable hole 211 and the mounting hole 110 (that is, the length of the column 320 extending into the first movable hole 211) can be adjusted, and as the pole 300 rotates, the threaded first internal thread and the first external thread 321 can continuously lock the column 320.

[0046] In another embodiment, the first positioning structure includes a first elastic protrusion and a plurality of first slots. The first elastic protrusion is arranged on the side wall of the column 320, and the plurality of first slots are arranged on the hole wall of the first movable hole 211 at intervals along the axis of the first movable hole 211. The first elastic protrusion is detachably connected to the first slot. By pushing and pulling the pole 300 along the axial direction of the first movable hole 211, the position of the column 320 in the first movable hole 211 and the mounting hole 110 can be adjusted, thereby adjusting the compression amount of the first sealing section 410. When the first When an elastic protrusion is inserted into the first slot, the column 320 is locked in the first movable hole 211; when the compression amount of the first sealing section 410 needs to be adjusted again, that is, when the position of the column 320 in the first movable hole 211 and the mounting hole 110 needs to be adjusted again, the pole 300 is pushed and pulled along the axial direction of the first movable hole 211, so that the first elastic protrusion is deformed and disengaged from the first slot, and the pole 300 continues to be pushed and pulled along the axial direction of the first movable hole 211 until the first elastic protrusion is inserted into the next first slot.

[0047] Alternatively, as Figures 1 to 5 As shown, the battery cover also includes a stopper 500, which is connected to the pressure block 200. Part of the stopper 500 is located within the first movable hole 211. The stopper 500 located within the first movable hole 211 abuts against the side of the column 320 facing away from the bottom plate 310, allowing the bottom plate 310 to maintain a state of cooperating with the cover body 100 to press the first sealing section 410, thereby improving the sealing reliability of the first sealing section 410. In this embodiment, the stopper 500 is made of high-strength steel to improve the reliability of the abutment between the stopper 500 and the column 320.

[0048] Optionally, the limiting member 500 and the pressing block 200 are detachably connected, so as to facilitate disassembly, assembly and maintenance of the limiting member 500 and the pressing block 200 .

[0049] Furthermore, if Figures 1 to 5As shown, the battery cover also includes a second positioning structure, the pressing block 200 is further provided with a second movable hole 212, the second movable hole 212 is located on the side of the pressing block 200 away from the cover body 100, and the second movable hole 212 is connected to the first movable hole 211, the limiting member 500 is movably arranged in the second movable hole 212 and the first movable hole 211, the second positioning structure is used to lock the limiting member 500 in the second movable hole 212, thereby realizing the detachable connection between the limiting member 500 and the pressing block 200, and the structural design also realizes the limiting member 500 in the first movable hole 21 1 (i.e., the length of the limiting member 500 extending into the first movable hole 211) is adjusted so that it can adapt to various compression amounts of the first sealing segment 410. When the compression amount of the first sealing segment 410 is large, the limiting member 500 is moved to a suitable position in a direction away from the column 320, and then the position of the limiting member 500 is locked by the second positioning structure. When the compression amount of the first sealing segment 410 is small, the limiting member 500 is moved to a suitable position in a direction toward the column 320, and then the position of the limiting member 500 is locked by the second positioning structure.

[0050] Furthermore, the second positioning structure includes a second internal thread and a second external thread that are threaded together. The second internal thread is arranged on the hole wall of the second movable hole 212, and the second external thread is arranged on the outer wall of the limit member 500. By screwing the limit member 500, the position of the limit member 500 in the second movable hole 212 and the first movable hole 211 (that is, the length of the limit member 500 extending into the first movable hole 211) can be adjusted, and as the limit member 500 rotates, the threaded second internal thread and the second external thread can continuously lock the limit member 500.

[0051] In another embodiment, the second positioning structure includes a second elastic protrusion and a plurality of second card slots. The second elastic protrusion is arranged on the side wall of the limiting member 500, and the plurality of second card slots are arranged on the hole wall of the second movable hole 212 at intervals along the axis of the second movable hole 212. The second elastic protrusion is detachably connected to the second card slot. By pushing and pulling the limiting member 500 along the axial direction of the second movable hole 212, the position of the limiting member 500 in the second movable hole 212 can be adjusted, and then the length of the limiting member 500 extending into the first movable hole 211 can be adjusted. When the second elastic protrusion is engaged in the second slot, the limiting member 500 is locked in the second movable hole 212; when the position of the limiting member 500 in the first movable hole 211 needs to be adjusted again, the limiting member 500 is pushed and pulled along the axial direction of the second movable hole 212, so that the second elastic protrusion is deformed and disengaged from the second slot, and the limiting member 500 is continued to be pushed and pulled along the axial direction of the second movable hole 212 until the second elastic protrusion is engaged in the next second slot.

[0052] Furthermore, the thread direction of the first external thread 321 is opposite to the thread direction of the second external thread, thereby improving the abutment effect between the limiting member 500 and the column 320 and further improving the sealing reliability of the first sealing section 410 .

[0053] Alternatively, as Figures 1 to 5 As shown, the abutment between the limiter 500 and the column 320 is the first abutment portion 510, and the abutment between the column 320 and the limiter 500 is the second abutment portion 322. One of the first abutment portion 510 and the second abutment portion 322 is a conical structure, and the other is a groove. The shape of the conical structure is adapted to the groove, and the side wall of the conical structure is pressed against the inner wall of the groove. On the one hand, the abutment area between the first abutment portion 510 and the second abutment portion 322 can be expanded to improve the abutment effect between the two. On the other hand, the abutment force can be concentrated on the tip area close to the conical structure, further improving the abutment effect between the first abutment portion 510 and the second abutment portion 322.

[0054] In this embodiment, the first abutting portion 510 is a conical structure, and the second abutting portion 322 is a groove. Of course, in other embodiments, the first abutting portion 510 may be a groove, and the second abutting portion 322 may be a conical structure.

[0055] Alternatively, as Figures 1 to 5 As shown, the compression block 200 includes a compression block body 210 and a first insulating member 220. The first movable hole 211 and the second movable hole 212 are both provided in the compression block body 210. The first insulating member 220 covers the sidewalls of the compression block body 210 and the side of the compression block body 210 facing the cover body 100, thereby insulating the compression block body 210 from the cover body 100. In this embodiment, the first insulating member 220 is coated on the compression block body 210 using an injection molding process, which ensures that the structure of the compression block 200 is more consistent.

[0056] Alternatively, as Figures 1 to 5 As shown, the battery cover further includes a second insulating member 600 , which covers the surface of the cover body 100 facing the bottom plate 310 to achieve insulation of the surface of the cover body 100 facing the bottom plate 310 .

[0057] Optionally, the column 320 and the base plate 310 are integrally formed, eliminating the welding process of the column 320 and the base plate 310, especially when the materials of the column 320 and the base plate 310 are different, eliminating the friction welding process between the two, which has the effect of reducing production difficulty and reducing production costs. In addition, the structure in which the column 320 and the base plate 310 are welded is prone to problems such as weld cracking and uneven welds. In this embodiment, the integrally formed structure of the column 320 and the base plate 310 solves the above problems, reduces the probability of cracking at the connection between the column 320 and the base plate 310, and improves the consistency of the overall structure of the pole 300.

[0058] In this embodiment, the cover body 100 is made of a plain aluminum plate. Of course, in other implementation schemes, the cover body 100 may also be made of other materials, which will not be described here.

[0059] Alternatively, as Figures 1 to 7 As shown, the battery cover also includes an explosion-proof valve 700 and a welding ring 800. An explosion-proof hole 120 is also provided on the cover body 100. A protrusion 121 is provided on the hole wall of the explosion-proof hole 120. The protrusion 121 extends along the circumference of the explosion-proof hole 120 and is a closed-loop structure. The explosion-proof valve 700 is arranged on the protrusion 121, and the welding ring 800 is located on the side of the explosion-proof valve 700 away from the protrusion 121 and is welded to the edge of the explosion-proof hole 120 so that the explosion-proof valve 700 is pressed between the welding ring 800 and the protrusion 121, thereby eliminating the structure in which the explosion-proof valve 700 is directly welded to the cover body 100, thereby avoiding the problem of deformation and cracking of the explosion-proof valve 700 when the explosion-proof valve 700 is welded to the cover body 100.

[0060] Furthermore, if Figures 1 to 7 As shown, the explosion-proof valve 700 includes a valve disc 710 and a sealing and thermal insulation member 720. The sealing and thermal insulation member 720 is coated on the sidewalls and both edges of the valve disc 710. This provides a seal between the valve disc 710 and the cover body 100. Furthermore, the sealing and thermal insulation member 720 provides thermal insulation during welding of the welding ring 800 and the edges of the explosion-proof hole 120, preventing thermal deformation and cracking of the valve disc 710. In this embodiment, the sealing and thermal insulation member 720 is made of plastic and is coated on the valve disc 710 via an injection molding process, resulting in a more consistent structure for the explosion-proof valve 700.

[0061] Alternatively, as Figures 1 to 7As shown, the battery cover also includes a protective sticker 900. The protective sticker 900 and the welding ring 800 are respectively located on opposite sides of the cover body 100. The protective sticker 900 is located on the side of the cover body 100 away from the pressing block 200, and the protective sticker 900 is attached to the edge of the explosion-proof hole 120 to block the explosion-proof hole 120. After the battery cover is placed on the opening of the battery shell, the pressing block 200 and the welding ring 800 are located on the outside of the battery shell, and the protective sticker 900 is located on the inside of the battery shell. The provision of the protective sticker 900 can prevent the electrolyte in the battery shell from impacting the explosion-proof valve 700, and prevent the explosion-proof valve 700 from being affected by the electrolyte, thereby providing a strong guarantee for the effectiveness of the explosion-proof valve 700. It should be noted that the protective sticker 900 can be made of PC (polycarbonate), PET (polyethylene terephthalate) or PP (polypropylene) materials commonly used in the art. Its specific preparation process and components are all existing technologies and will not be repeated here.

[0062] This embodiment also provides a battery cell, which includes a battery shell, a battery cell and the above-mentioned battery cover. The battery cell is arranged in the battery shell, and the cover body 100 is covered at the opening of the battery shell. The battery cell adopts the above-mentioned battery cover. The above-mentioned battery cover has a high yield rate, so the battery cell also has a high yield rate. The cover body 100, the pressing block 200, the pole 300 and the seal 400 of the battery cover are easy to disassemble and assemble, and the compression amount of the seal 400 of the battery cover is adjustable.

[0063] 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. Battery cover, characterized in that, include: A cover plate body (100), wherein the cover plate body (100) is provided with a mounting hole (110); A pressing block (200), the pressing block (200) is arranged on the cover plate body (100), and the pressing block (200) is provided with a first movable hole (211); A pole (300), the pole (300) comprising a base plate (310) and a column (320), the base plate (310) being connected to the column (320), the base plate (310) being located on a side of the cover plate body (100) facing away from the pressing block (200), and the column (320) being movably disposed in the mounting hole (110) and the first movable hole (211); a first positioning structure, the first positioning structure being used to lock the column (320) in the first movable hole (211); A sealing member (400) includes a first sealing section (410), the first sealing section (410) is sleeved on the column (320), and the first sealing section (410) is clamped between the bottom plate (310) and the edge of the mounting hole (110).

2. The battery cover according to claim 1, characterized in that: The first positioning structure comprises a first internal thread and a first external thread (321) that are threadably matched, the first internal thread being arranged on the hole wall of the first movable hole (211), and the first external thread (321) being arranged on the side wall of the column (320).

3. The battery cover according to claim 1, characterized in that: The sealing member (400) further comprises a second sealing section (420), the second sealing section (420) being sleeved on the column (320) and connected to the first sealing section (410), the second sealing section (420) being clamped between the hole wall of the mounting hole (110) and the side wall of the column (320).

4. The battery cover according to any one of claims 1 to 3, characterized in that: The battery cover further comprises a limiting member (500), the limiting member (500) being connected to the pressing block (200), a portion of the limiting member (500) being located within the first movable hole (211), and the limiting member (500) located within the first movable hole (211) being in contact with a side of the column (320) facing away from the bottom plate (310).

5. The battery cover according to claim 4, characterized in that: The limiting member (500) is detachably connected to the pressing block (200).

6. The battery cover according to claim 4, characterized in that: The battery cover plate further comprises a second positioning structure, the pressing block (200) is further provided with a second movable hole (212), the second movable hole (212) is located on a side of the pressing block (200) away from the cover plate body (100), and the second movable hole (212) is communicated with the first movable hole (211), the limiting member (500) is movably arranged in the second movable hole (212) and the first movable hole (211), and the second positioning structure is used to lock the limiting member (500) in the second movable hole (212).

7. The battery cover according to claim 6, characterized in that: The second positioning structure comprises a second internal thread and a second external thread that are threadably matched, the second internal thread being arranged on the hole wall of the second movable hole (212), and the second external thread being arranged on the outer wall of the limiting member (500).

8. The battery cover according to claim 7, characterized in that: The first positioning structure includes a first internal thread and a first external thread (321) that are threaded together, the first internal thread is arranged on the hole wall of the first movable hole (211), the first external thread (321) is arranged on the side wall of the column (320), and the thread direction of the first external thread (321) is opposite to the thread direction of the second external thread.

9. The battery cover according to claim 4, characterized in that: The abutment point between the limiting member (500) and the column (320) is a first abutment portion (510), and the abutment point between the column (320) and the limiting member (500) is a second abutment portion (322). One of the first abutment portion (510) and the second abutment portion (322) is a conical structure, and the other is a groove. The outer shape of the conical structure is adapted to the groove, and the side wall of the conical structure presses against the inner wall of the groove.

10. A battery cell, characterized in that The invention comprises a battery shell, a battery cell and a battery cover according to any one of claims 1 to 9, wherein the battery cell is arranged in the battery shell, and the cover body (100) is arranged to cover the opening of the battery shell.

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