Battery top cover and battery monomer

Abstract

The invention belongs to the technical field of batteries, and discloses a battery top cover and a battery monomer. The battery top cover comprises a top cover sheet, upper plastic, lower plastic, a pole and a sealing ring, a first mounting hole is formed in the top cover piece, the upper plastic is tightly attached to one side of the top cover piece, a first air channel is formed in the side wall of the upper plastic, a second air channel is formed in the contact range of the upper plastic and the top cover piece, a second mounting hole is formed in the lower plastic, and the lower plastic is located on one side of the top cover piece. The pole sequentially penetrates through the second mounting hole and the first mounting hole and is riveted with the pressing block in the upper plastic; first gaps are reserved between the pole and the first mounting hole and between the pole and the second mounting hole; a third air passage is arranged between the pole and the lower plastic, the first air passage, the second air passage, the first gap, the third air passage and the interior of the battery are sequentially communicated, and the first air passage is communicated with the outside. The sealing ring sleeves the pole and can seal the first gap. The battery top cover can prevent neglected loading of the sealing ring; and the electrolyte can be prevented from corroding the top cover of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery top cover and a battery cell. Background Art

[0002] Usually, the battery top cover includes components such as a plain aluminum sheet, an upper plastic, a lower plastic, a sealing ring, and a pole, and the components are connected by riveting and other processes. Under the action of the riveting force, the components are in a tightly fitted state to ensure the sealing performance of the battery top cover. For a battery top cover of this structure, even if the sealing ring is missing, the upper plastic and the lower plastic are compressed and deformed to ensure that the battery top cover has a certain sealing performance, resulting in the battery including the battery top cover being able to pass the helium test. However, when the battery is actually used, if the relative position of the pole and the plain aluminum sheet changes, the unstable (temporary) sealing formed by the upper plastic and the lower plastic will fail, resulting in battery leakage.

[0003] Therefore, there is an urgent need to provide a battery top cover and a battery cell to solve the above problems. Summary of the invention

[0004] The first object of the present invention is to provide a battery top cover, which can prevent the sealing ring from being missed and improve the battery yield; it can also prevent the electrolyte overflowing onto the top cover sheet during battery filling from flowing into the second air channel to avoid corrosion to the battery top cover.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Battery cover, including:

[0007] A top cover sheet, wherein the top cover sheet is provided with a first mounting hole;

[0008] An upper plastic, the upper plastic is closely attached to a side of the top cover sheet away from the battery cell, a first air channel is provided on a side wall of the upper plastic, and a second air channel is provided within a contact range between the upper plastic and the top cover sheet;

[0009] A lower plastic, wherein a second mounting hole is provided on the lower plastic, and the lower plastic is located on a side of the top cover sheet facing the battery core;

[0010] A pole, wherein the second mounting hole and the first mounting hole are sequentially penetrated in the pole and are riveted to the pressing block in the upper plastic, a first gap is left between the pole and the first mounting hole and the second mounting hole, a third air channel is provided between the pole and the lower plastic, the first air channel, the second air channel, the first gap, the third air channel and the interior of the battery are sequentially connected, and the first air channel is connected to the outside;

[0011] A sealing ring is sleeved on the pole and can seal the first gap.

[0012] As an alternative technical solution of the battery top cover, a first exhaust groove is formed on the inner side wall of the upper plastic, and a first air passage is defined between the first exhaust groove and the outer side wall of the pressing block.

[0013] As an alternative technical solution of the battery top cover, a second exhaust groove is provided on the side of the top cover sheet facing the upper plastic. The first exhaust groove penetrates through the bottom wall of the upper plastic and communicates with the second exhaust groove, and a second air passage is defined between the second exhaust groove and the upper plastic.

[0014] As an alternative technical solution of the battery top cover, the number of the first exhaust grooves and the second exhaust grooves is multiple, the second exhaust grooves correspond to the first exhaust grooves one by one, and the multiple second exhaust grooves are uniformly spaced along the outer circumference of the first mounting hole.

[0015] As an alternative technical solution of the battery top cover, a plurality of convex platforms are provided along the circumferential direction of the inner side wall of the upper plastic, and the first exhaust groove is defined between two adjacent convex platforms.

[0016] As an alternative technical solution of the battery top cover, along the thickness direction of the top cover sheet, the height of the convex platform is lower than the height of the side wall of the upper plastic, and the pressing block is placed on the convex platform.

[0017] As an alternative technical solution of the battery top cover, the pole column includes a column body and a chassis, the column body is connected to the chassis, the column body passes through the second mounting hole and the first mounting hole, the chassis abuts against the lower plastic, and the third air passage is located between the chassis and the lower plastic.

[0018] As an alternative technical solution of the battery top cover, a third exhaust groove is provided on the side of the lower plastic facing the chassis, and a third air passage is defined between the third exhaust groove and the chassis.

[0019] As an alternative technical solution of the battery top cover, the sealing ring includes a first sealing portion and a second sealing portion connected to each other. The first sealing portion is clamped between the hole wall of the first mounting hole and the side wall of the column body, and the second sealing portion is located in the second mounting hole and is clamped between the top cover sheet and the chassis.

[0020] The second object of the present invention is to provide a battery cell with high yield and high safety.

[0021] To achieve this purpose, the present invention adopts the following technical solutions:

[0022] A battery cell, including an electric core, a battery housing and the above-mentioned battery top cover, the electric core is located in the battery housing, and the top cover sheet covers the opening of the battery housing.

[0023] Advantages of the present invention:

[0024] The battery top cover provided by the present invention includes a top cover sheet, an upper plastic, a lower plastic, a pole column, and a sealing ring. The upper plastic is closely attached to the top cover sheet, the lower plastic is located on one side of the top cover sheet, and the pole column is riveted to a pressing block inside the upper plastic; a first air passage is provided on the side wall of the upper plastic, a second air passage is provided within the contact range of the upper plastic and the top cover sheet, a first gap is left between the pole column and both the first mounting hole and the second mounting hole, a third air passage is provided between the pole column and the lower plastic, the first air passage, the second air passage, the first gap, the third air passage, and the interior of the battery are sequentially connected, and the first air passage is connected to the outside. The sealing ring is sleeved on the pole column and can seal the first gap. During actual assembly, due to the riveting effect between the pole column and the pressing block, the upper plastic, the pressing block, the top cover sheet, and the lower plastic are closely attached at the connection to form a seal. The sealing ring can block the first gap, ensuring the sealing performance of the battery top cover. If the sealing ring is omitted during actual assembly, although the upper plastic, the pressing block, the top cover sheet, and the lower plastic are closely attached at the connection to form a seal, since the first gap is not blocked by the sealing ring, external gas can enter the interior of the battery through the first air passage, the second air passage, the first gap, and the third passage, and then the battery cannot pass the helium detection test, thereby preventing the omission of the sealing ring and improving the yield rate of the battery. In addition, since the first air passage is located on the side wall of the upper plastic and the second air passage is located within the contact range of the upper plastic and the top cover sheet, that is, neither the first air passage nor the second air passage exceeds the projection range of the upper plastic on the top cover sheet, and the upper plastic is closely attached to the top cover sheet, it can prevent the electrolyte overflowing onto the top cover sheet during battery liquid injection from flowing into the second air passage, so as to avoid corrosion of the battery top cover. Description of the drawings

[0025] Figure 1 is a partial cross-sectional view of the battery top cover provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the upper plastic provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of the top cover sheet provided by an embodiment of the present invention;

[0028] Figure 4 is a partial schematic structural diagram of the lower plastic provided by an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of the pole column provided by an embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of the sealing ring provided by an embodiment of the present invention.

[0031] In the figure:

[0032] 100. Top cover sheet; 110. First mounting hole; 120. Second exhaust groove; 101. Second air passage; 200. Upper plastic; 210. First exhaust groove; 220. Boss; 201. First air passage; 300. Lower plastic; 310. Second mounting hole; 320. Third exhaust groove; 301. Third air passage; 400. Terminal post; 410. Column body; 420. Chassis; 500. Sealing ring; 510. First sealing portion; 520. Second sealing portion; 600. Pressing block. Detailed implementation mode

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0037] This embodiment provides a battery top cover, which can prevent the sealing ring from being missed, improve the yield rate of the battery; and can also prevent the electrolyte overflowing onto the top cover sheet during battery liquid injection from flowing into the second air duct, so as to avoid corrosion of the battery top cover.

[0038] Specifically, as Figures 1 to 4 shown, the battery top cover includes a top cover sheet 100, an upper plastic 200, a lower plastic 300, a pole column 400 and a sealing ring 500. Usually, the top cover sheet 100 is a light aluminum sheet, and a first mounting hole 110 is provided on the top cover sheet 100. The upper plastic 200 is a groove structure, the outer bottom wall of the groove of the upper plastic 200 is closely attached to the side of the top cover sheet 100 away from the battery cell, a first air duct 201 is provided on the side wall of the upper plastic 200, and a second air duct 101 is provided within the contact range of the upper plastic 200 and the top cover sheet 100, that is, the second air duct 101 does not exceed the edge of the bottom wall of the groove of the upper plastic 200, that is, the second air duct 101 is within the orthographic projection range of the upper plastic 200 on the top cover sheet 100. A second mounting hole 310 is provided on the lower plastic 300, and the lower plastic 300 is located on the side of the top cover sheet 100 facing the battery cell. The pole column 400 sequentially passes through the second mounting hole 310 and the first mounting hole 110 and is riveted to a pressing block 600 inside the upper plastic 200, and a first gap is left between the pole column 400 and the first mounting hole 110 and the second mounting hole 310; a third air duct 301 is provided between the pole column 400 and the lower plastic 300, the first air duct 201, the second air duct 101, the first gap, the third air duct 301 and the inside of the battery are sequentially connected, and the first air duct 201 is connected to the outside. The sealing ring 500 is sleeved on the pole column 400 and can seal the first gap.

[0039] Based on the above design, the upper plastic 200 is closely attached to the top cover sheet 100, the lower plastic 300 is located on one side of the top cover sheet 100, and the pole 400 is riveted to the pressing block 600 inside the upper plastic 200; a first air passage 201 is provided on the side wall of the upper plastic 200, a second air passage 101 is provided within the contact range of the upper plastic 200 and the top cover sheet 100, a first gap is left between the pole 400 and both the first mounting hole 110 and the second mounting hole 310, a third air passage 301 is provided between the pole 400 and the lower plastic 300, the first air passage 201, the second air passage 101, the first gap, the third air passage 301 and the inside of the battery are connected in sequence, and the first air passage 201 is connected to the outside. The sealing ring 500 is sleeved on the pole 400 and can seal the first gap. During actual assembly, due to the riveting effect between the pole 400 and the pressing block 600, the upper plastic 200, the pressing block 600, the top cover sheet 100 and the lower plastic 300 are closely attached at the joints to form a seal. The sealing ring 500 can block the first gap to ensure the sealing performance of the battery top cover. If the sealing ring 500 is omitted during actual assembly, although the upper plastic 200, the pressing block 600, the top cover sheet 100 and the lower plastic 300 are closely attached at the joints to form a seal, since the first gap is not blocked by the sealing ring 500, external gas can still enter the battery through the first air passage 201, the second air passage 101, the first gap and the third passage, and then the battery cannot pass the helium detection test, thereby preventing the omission of the sealing ring 500 and improving the yield rate of the battery. In addition, since the first air passage 201 is located on the side wall of the upper plastic 200 and the second air passage 101 is located within the contact range of the upper plastic 200 and the top cover sheet 100, that is, neither the first air passage 201 nor the second air passage 101 exceeds the projection range of the upper plastic 200 on the top cover sheet 100, and the upper plastic 200 is closely attached to the top cover sheet 100, it can prevent the electrolyte overflowing onto the top cover sheet 100 during battery liquid injection from flowing into the second air passage 101 to avoid corrosion of the battery top cover.

[0040] Optionally, continue as Figure 2 shown, a first exhaust groove 210 is formed on the inner side wall of the upper plastic 200, and the first air passage 201 is defined between the first exhaust groove 210 and the outer side wall of the pressing block 600. Setting the first exhaust groove 210 on the inner side wall of the upper plastic 200 can prevent the connection between the first air passage 201 and the second air passage 101 from being exposed outside the upper plastic 200, and further prevent the electrolyte overflowing onto the top cover sheet 100 during battery liquid injection from flowing into the second air passage 101; and the first air passage 201 defined between the first exhaust groove 210 and the outer side wall of the pressing block 600 enables gas to enter and exit only at the first air passage 201, and other positions (excluding the first exhaust groove 210) on the inner side wall of the upper plastic 200 are in close contact with the side wall of the pressing block 600 to ensure the sealing performance of the battery top cover.

[0041] Furthermore, continue as Figure 3As shown, on one side of the top cover sheet 100 facing the upper plastic 200, a second exhaust groove 120 is provided. The first exhaust groove 210 penetrates through the bottom wall of the upper plastic 200 and communicates with the second exhaust groove 120 to prevent the connection between the first exhaust groove 210 and the second exhaust groove 120 from being exposed outside the upper plastic 200. A second air passage 101 is defined between the second exhaust groove 120 and the upper plastic 200 to prevent air leakage in the second air passage 101.

[0042] To shorten the gas flow path, the first exhaust groove 210 is a strip-shaped groove extending through in the thickness direction of the top cover sheet 100. The second exhaust groove 120 is a strip-shaped groove extending from the edge of the first mounting hole 110 (communicating with the first mounting hole 110) in the radial direction of the first mounting hole 110 away from the first mounting hole 110 to the first exhaust groove 210.

[0043] Optionally, the number of both the first exhaust grooves 210 and the second exhaust grooves 120 is multiple. The second exhaust grooves 120 correspond to the first exhaust grooves 210 one by one. The multiple second exhaust grooves 120 are evenly spaced along the outer circumference of the first mounting hole 110 to improve the obviousness of the result prompt for the missing installation of the sealing ring 500 during the helium detection test of the battery.

[0044] In this embodiment, the terminal post 400 is an imitation cylinder 410, the upper plastic 200 is an imitation cube, and both the first exhaust grooves 210 and the second exhaust grooves 120 are four. The four first exhaust grooves 210 are respectively located on the four side walls of the upper plastic 200 and extend in the thickness direction of the top cover sheet 100. Two of the second exhaust grooves 120 extend in the length direction of the top cover sheet 100, and the other two second exhaust grooves 120 extend in the width direction of the top cover sheet 100.

[0045] It should be noted that there are clamping posts and clamping grooves between the upper plastic 200 and the top cover sheet 100, and the clamping posts and clamping grooves are arranged avoiding the second exhaust grooves 120.

[0046] To increase the side wall thickness of the upper plastic 200, continue as Figure 1 and Figure 2 shown, a plurality of convex platforms 220 are provided along the inner circumference of the side wall of the upper plastic 200. The first exhaust grooves 210 are defined between adjacent two convex platforms 220, thereby improving the sealing performance of the upper plastic 200.

[0047] Furthermore, along the thickness direction of the top cover sheet 100, the height of the convex platform 220 is lower than the height of the side wall of the upper plastic 200. The pressing block 600 is placed on the convex platform 220 to realize the riveting of the outer side wall of the pressing block 600 and the upper plastic 200, improving the sealing performance of the battery top cover.

[0048] It should be noted that a second gap is left between the inner sidewall of the upper plastic 200 outside the boss 220 and the outer sidewall of the pressing block 600, and external gas can enter the first air passage 201 through the second gap.

[0049] As Figure 1 and Figure 5 shown, the terminal post 400 includes a column body 410 and a chassis 420. The column body 410 is connected to the chassis 420. The column body 410 passes through the second mounting hole 310 and the first mounting hole 110. The chassis 420 abuts against the lower plastic 300. The third air passage 301 is located between the chassis 420 and the lower plastic 300 to ensure the connection sealing performance between the terminal post 400 and the lower plastic 300.

[0050] Optionally, continuing as Figure 4 shown, the lower plastic 300 is provided with a third exhaust groove 320 on the side facing the chassis 420. The third exhaust groove 320 and the chassis 420 define the third air passage 301 to ensure the sealing performance of the third air passage 301.

[0051] The number of the third exhaust grooves 320 is multiple. Exemplarily, it can be two, three, four or six. In this embodiment, the number of the third exhaust grooves 320 is four. The multiple third exhaust grooves 320 are evenly spaced along the outer circumference of the second mounting hole 310.

[0052] In this embodiment, the lower plastic 300 is provided with an annular groove along the outer circumference of the second mounting hole 310. The chassis 420 is located in the annular groove to increase the sealing performance between the chassis 420 and the lower plastic 300.

[0053] It should be noted that the third exhaust groove 320 is located at the bottom of the annular groove, and a third gap is left between the outer peripheral side of the chassis 420 and the inner sidewall of the annular groove, which can enable the gas in the third exhaust groove 320 to enter the battery interior through the third gap.

[0054] In order to shorten the gas flow path, the third exhaust groove 320 is a strip-shaped groove extending from the edge of the second mounting hole 310 (communicating with the second mounting hole 310) along the radial direction of the second mounting hole 310 towards the inner sidewall of the annular groove.

[0055] Optionally, as Figure 6 shown, the sealing ring 500 includes a first sealing portion 510 and a second sealing portion 520 which are connected to each other. The first sealing portion 510 is clamped between the hole wall of the first mounting hole 110 and the sidewall of the column body 410. The second sealing portion 520 is located in the second mounting hole 310 and is clamped between the top cover sheet 100 and the chassis 420 to seal the entire first gap.

[0056] In this embodiment, the battery top cover includes two pole columns 400, two upper plastics 200, two pressing blocks 600 and two sealing rings 500. One of the two pole columns 400 is a positive pole column and the other is a negative pole column. There are two first mounting holes 110 on the top cover sheet 100, and two second mounting holes 310 on the lower plastic 300. The first mounting holes 110 correspond to the second mounting holes 310 one by one, and both the first mounting holes 110 and the second mounting holes 310 correspond to the pole columns 400 one by one. The assembly methods of the positive pole column and the negative pole column can be the same or different, which will not be elaborated here one by one.

[0057] Further, the two first mounting holes 110 are arranged at intervals along the length direction of the top cover sheet 100. The explosion-proof valve is arranged between the two first mounting holes 110, and the liquid injection hole is located between the first mounting hole 110 where the positive pole column 400 is located and the explosion-proof valve.

[0058] This embodiment also provides a battery cell, which has a high yield rate and high safety.

[0059] Specifically, the battery cell includes a battery core, a battery housing and the above-mentioned battery top cover. The battery core is located inside the battery housing, and the top cover sheet 100 covers the opening of the battery housing. Since the above-mentioned battery top cover can prevent the sealing ring 500 from being omitted, the yield rate of the battery cell can be improved; it can also prevent the electrolyte overflowing onto the top cover sheet 100 when the battery cell is filled with liquid from flowing into the second air passage 101, so as to avoid corrosion of the battery top cover and improve the safety performance of the battery cell.

[0060] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery cover, characterized in that: include: A top cover sheet (100), wherein a first mounting hole (110) is provided on the top cover sheet (100); An upper plastic (200), the upper plastic (200) being closely attached to a side of the top cover sheet (100) facing away from the battery core, a first air channel (201) being provided on a side wall of the upper plastic (200), and a second air channel (101) being provided within a contact range between the upper plastic (200) and the top cover sheet (100); A lower plastic (300), wherein a second mounting hole (310) is provided on the lower plastic (300), and the lower plastic (300) is located on a side of the top cover sheet (100) facing the battery core; A pole (400), wherein the pole (400) is sequentially provided with the second mounting hole (310) and the first mounting hole (110) and is riveted to a pressing block (600) in the upper plastic (200), a first gap is left between the pole (400) and the first mounting hole (110) and the second mounting hole (310), a third air channel (301) is provided between the pole (400) and the lower plastic (300), the first air channel (201), the second air channel (101), the first gap, the third air channel (301) and the interior of the battery are sequentially connected, and the first air channel (201) is connected to the outside; A sealing ring (500), wherein the sealing ring (500) is sleeved on the pole (400) and is capable of sealing the first gap.

2. The battery top cover according to claim 1, characterized in that: A first exhaust groove (210) is provided on the inner side wall of the upper plastic (200), and a first air channel (201) is defined between the first exhaust groove (210) and the outer side wall of the pressing block (600).

3. The battery top cover according to claim 2, characterized in that: A second exhaust groove (120) is provided on a side of the top cover sheet (100) facing the upper plastic (200); the first exhaust groove (210) penetrates the bottom wall of the upper plastic (200) and is connected to the second exhaust groove (120); and the second air channel (101) is defined between the second exhaust groove (120) and the upper plastic (200).

4. The battery top cover according to claim 3, characterized in that: The number of the first exhaust grooves (210) and the number of the second exhaust grooves (120) are both multiple, the second exhaust grooves (120) correspond to the first exhaust grooves (210) one by one, and the multiple second exhaust grooves (120) are evenly spaced along the outer circumference of the first mounting hole (110).

5. The battery top cover according to claim 4, characterized in that: A plurality of bosses (220) are provided along the circumferential direction of the inner side wall of the upper plastic (200), and the first exhaust groove (210) is defined between two adjacent bosses (220).

6. The battery top cover according to claim 5, characterized in that: Along the thickness direction of the top cover sheet (100), the height of the boss (220) is lower than the height of the side wall of the upper plastic (200), and the pressing block (600) is mounted on the boss (220).

7. The battery top cover according to claim 1, characterized in that: The pole (400) comprises a column (410) and a chassis (420), the column (410) being connected to the chassis (420), the column (410) being provided with the second mounting hole (310) and the first mounting hole (110), the chassis (420) being in contact with the lower plastic (300), and the third air passage (301) being located between the chassis (420) and the lower plastic (300).

8. The battery top cover according to claim 7, characterized in that: A third exhaust groove (320) is provided on one side of the lower plastic (300) facing the bottom plate (420), and the third exhaust groove (320) and the bottom plate (420) define the third air channel (301).

9. The battery top cover according to claim 7, characterized in that: The sealing ring (500) comprises a first sealing portion (510) and a second sealing portion (520) which are connected to each other, wherein the first sealing portion (510) is sandwiched between the hole wall of the first mounting hole (110) and the side wall of the column (410), and the second sealing portion (520) is located in the second mounting hole (310) and sandwiched between the top cover sheet (100) and the bottom plate (420).

10. A battery cell, characterized in that: It comprises a battery cell, a battery shell and a battery top cover according to any one of claims 1 to 9, wherein the battery cell is located in the battery shell, and the top cover sheet (100) is arranged to cover the opening of the battery shell.

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