Battery cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery cover plate assembly and a battery, and a connecting block of the battery cover plate assembly is fixed in a first mounting hole of a top cover plate. One end of the pole column is connected with a flattened tab on the pole group, the tab is attached to the end face of the pole group, and the other end of the pole column penetrates through the second mounting hole in the connecting block and is welded to the inner wall of the second mounting hole. The tabs do not need to be bent, and connecting pieces do not need to be arranged, so that the working procedures are saved, the number of parts is reduced, the cost is relatively low, meanwhile, the space in the height direction of the battery cover plate assembly is also saved, and the energy density of a pole group is favorably improved. In addition, because a bending process is not needed, the assembly process of the battery cover plate is simple, the manufacturing difficulty is low, and the assembly efficiency is high. The utility model further provides a battery which comprises the battery cover plate assembly.

Description

Technical Field

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

[0002] At present, the cover assembly of the blade battery includes a top cover sheet, a pole, a rivet block, an upper plastic part, a lower plastic part and a rivet block, wherein the upper plastic part and the lower plastic part are respectively arranged on both sides of the top cover sheet, and the pole is successively passed through the lower plastic part, the top cover sheet and the upper plastic part, and one end of the pole is welded to the connecting piece, and the connecting piece is welded to the bent pole ear on the pole group, and the other end of the pole is first riveted to the rivet block, and then the pole and the rivet block are welded and fixed.

[0003] When the above assembly scheme is adopted, since the tab occupies a large space when bent, it is not conducive to improving the energy density of the battery. In addition, the bending process of the tab is complicated, and the tab needs to be connected to the pole through a connecting sheet, so the assembly efficiency is low. Utility Model Content

[0004] The utility model aims to provide a battery cover assembly and a battery, which has fewer parts and components, is conducive to reducing costs, has a simple manufacturing process, has a high space utilization rate, and has a high assembly efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the utility model provides a battery cover assembly, comprising:

[0007] A top cover sheet having a first mounting hole;

[0008] A connecting block, partly passing through the first mounting hole, and two ends of the connecting block along the axial direction of the first mounting hole are respectively pressed against the opposite end surfaces of the top cover sheet, and a second mounting hole is provided on the connecting block;

[0009] A pole, one end of which is connected to the pole lug of the pole group, and the other end of which is passed through the second mounting hole and welded to the inner wall of the second mounting hole;

[0010] The insulating sealing component is sandwiched between the connecting block and the top cover sheet.

[0011] Optionally, the pole includes a first base portion and a first column portion which are connected to each other, the first base portion and the pole lug are both flat-plate-shaped, the side of the first base portion facing away from the first column portion is in contact with the pole lug, and the first column portion is passed through the second mounting hole and welded to the inner wall of the second mounting hole.

[0012] Optionally, the connecting block includes a second base portion and a second column portion that are sequentially connected. The second mounting hole penetrates through the second base portion and the second column portion. The second base portion is pressed against the side of the top cover sheet facing away from the electrode group. One end of the second column portion that penetrates into the first mounting hole is bent along the radial direction of the first mounting hole to form a bent portion. One side of the bent portion is pressed against the side of the top cover sheet facing the electrode group, and the other side of the bent portion is attached to the side of the first base portion facing away from the tab.

[0013] Optionally, a first guiding surface is formed at the connection between the second column portion and the bent portion, and a second guiding surface is provided at one end of the first column portion inserted into the second mounting hole.

[0014] Optionally, the insulating and sealing assembly includes an upper plastic part. The second column portion passes through the upper plastic part, and the upper plastic part is clamped between the end face of the top cover sheet on the side facing away from the electrode group and the second base portion.

[0015] Optionally, the insulating and sealing assembly includes a lower plastic part. The second column portion passes through the lower plastic part, and the lower plastic part is clamped between the end face of the top cover sheet on the side close to the electrode group and the bent portion.

[0016] Optionally, the insulating and sealing assembly includes a sealing member. The sealing member is sleeved on the second column portion and is clamped between the second column portion and the top cover sheet.

[0017] Optionally, a third mounting hole is provided on the top cover sheet, and an explosion-proof valve is provided in the third mounting hole;

[0018] And / or, a liquid injection hole is provided on the top cover sheet, and a sealing nail is provided in the liquid injection hole.

[0019] On the other hand, the present invention provides a battery, including a housing and the battery cover assembly in any of the above solutions. An opening is provided on the housing, and the battery cover assembly seals the opening.

[0020] Optionally, openings are provided on both opposite sides of the housing, and there are two battery cover assemblies. The two battery cover assemblies respectively seal one opening.

[0021] The beneficial effects of the present invention are:

[0022] The present utility model provides a battery cover plate assembly, which includes a top cover plate, a connecting block, a pole column, and an insulating and sealing assembly. Among them, part of the connecting block penetrates through the first mounting hole of the top cover plate, and both ends of the connecting block are pressed against the opposite end faces of the top cover plate along the axial direction of the first mounting hole. The connecting block is provided with a second mounting hole. One end of the pole column is connected to the flattened tab of the electrode group, the tab is attached to the end face of the electrode group, and the other end of the pole column penetrates through the second mounting hole and is welded to the inner wall of the second mounting hole, thereby realizing the electrical connection between the pole column and the connecting block, and at the same time, the weld seam between the two seals the second mounting hole. Since the tab is made by the flattening process, the tab does not need to be bent, and there is no need to set up a connecting piece, thus saving processes, reducing the number of parts, having a lower cost, and also saving the space in the height direction of the battery cover plate assembly, which is beneficial to improving the energy density of the electrode group under the same volume. In addition, after the pole column is welded to the tab and the pole column is installed in the second mounting hole of the connecting block, the pole column is welded to the inner wall of the second mounting hole, and the battery cover plate assembly is completed. The assembly process is simple, the manufacturing process difficulty is low, and the assembly efficiency is high.

[0023] The present utility model also provides a battery, which includes a housing, an electrode group, and the above-mentioned battery cover plate assembly. The housing is provided with an opening, the battery cover plate assembly is plugged at the opening, and the electrode group is arranged inside the housing. By adopting this battery cover plate assembly, on the one hand, the tab is attached to the end face of the electrode group, the tab does not need to be bent, saving the space in the height direction of the battery, and the energy density of the battery is relatively high under the same volume. At the same time, since there is no need to perform the tab bending process, the processing and assembly steps can be simplified, and the assembly efficiency can be improved. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0025] Figure 1 It is a schematic structural diagram of the electrode group provided in the embodiment of the present utility model;

[0026] Figure 2 It is a schematic assembly structure diagram of the electrode group and the pole column provided in the embodiment of the present utility model;

[0027] Figure 3 It is a schematic structural diagram before the battery cover plate and the electrode group are assembled provided in the embodiment of the present utility model;

[0028] Figure 4 It is a schematic structural diagram after the battery cover plate and the electrode group are assembled provided in the embodiment of the present utility model;

[0029] Figure 5 is a schematic structural view of the positive electrode cover plate of the battery provided in the embodiment of the present utility model;

[0030] Figure 6 is a top view of the positive electrode cover plate of the battery provided in the embodiment of the present utility model;

[0031] Figure 7 is Figure 6 a sectional view of the A-A section in

[0032] Figure 8 is a schematic structural view of the negative electrode cover plate of the battery provided in the embodiment of the present utility model;

[0033] Figure 9 is a top view of the negative electrode cover plate of the battery provided in the embodiment of the present utility model;

[0034] Figure 10 is Figure 9 a sectional view of the B-B section in

[0035] Figure 11 is a schematic structural view of the battery provided in the embodiment of the present utility model;

[0036] Figure 12 is a sectional view of the battery provided in the embodiment of the present utility model.

[0037] In the figure:

[0038] 10, housing; 20, electrode group; 21, tab; 21a, positive tab; 21b, negative tab; 30, explosion-proof valve; 31, protective film;

[0039] 100, top cover sheet; 101, first mounting hole; 102, third mounting hole; 103, liquid injection hole;

[0040] 200, connecting block; 201, second mounting hole; 210, second base portion; 220, second column portion; 221, first guiding surface; 230, bending portion;

[0041] 300, terminal; 300a, positive terminal; 300b, negative terminal; 310, first base portion; 320, first column portion; 321, second guiding surface; 322, weld seam;

[0042] 400, upper plastic part; 401, accommodating groove; 500, lower plastic part; 501, support rib; 600, seal. Detailed implementation manners

[0043] The present utility model 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 utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", 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 components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, 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", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] As Figures 1-4 shown, this embodiment provides a battery cover assembly, which includes a top cover sheet 100, a connecting block 200, a pole column 300, and an insulating and sealing assembly. Among them, a first mounting hole 101 is provided on the top cover sheet 100, and a part of the connecting block 200 is inserted into the first mounting hole 101 and along the axial direction of the first mounting hole 101 ( Figure 3 、 Figure 4At both ends of the connecting block 200 in the Z-axis direction are respectively pressed against the opposite end faces of the top cover sheet 100, thereby fixing the connecting block 200 on the top cover sheet 100. A second mounting hole 201 is provided on the connecting block 200. After one end of the pole column 300 is connected to the tab 21 of the electrode group 20, the other end passes through the second mounting hole 201 and is welded to the inner wall of the second mounting hole 201. A weld seam 322 is formed between the pole column 300 and the inner wall of the second mounting hole 201, thereby realizing the electrical connection between the pole column 300 and the connecting block 200. At the same time, the pole column 300 is fixed in the second mounting hole 201 and seals the second mounting hole 201. The insulating and sealing assembly is clamped between the connecting block 200 and the inner wall of the first mounting hole 101 of the top cover sheet 100. The connecting block 200 and the top cover sheet 100 are insulated through the insulating and sealing assembly, and at the same time, the first mounting hole 101 of the top cover sheet 100 is sealed.

[0048] It should be noted that when assembling the battery cover plate assembly in this embodiment, first, the insulating and sealing assembly and the connecting block 200 are installed on the top cover sheet 100. The tabs 21 on the electrode group 20 are made by a flattening process, so that the tabs 21 are parallel to the end face of the electrode group 20. Then the tab 21 is welded to the pole column 300, and then the end of the pole column 300 far from the electrode group 20 is inserted into the second mounting hole 201 of the connecting block 200, and the pole column 300 is welded to the inner wall of the second mounting hole 201, thus completing the assembly.

[0049] Since the tabs 21 are made by a flattening process and then the tabs 21 are welded to the pole column 300, the tabs 21 do not need to be bent, and there is no need to provide connecting pieces, thus saving processes, reducing the number of parts, having a lower cost, and at the same time saving space in the height direction (i.e., Figure 3 、 Figure 4 the Z-axis direction in) of the battery cover plate assembly. It is beneficial to improve the energy density of the electrode group 20 under the same volume. In addition, after the pole column 300 is installed in the second mounting hole 201 of the connecting block 200, the pole column 300 is welded to the inner wall of the second mounting hole 201, and the electrical connection between the two can be realized. The assembly of the two is completed, and there is no need to perform the bending process of the tab 21. The assembly process is simple, the manufacturing process difficulty is low, and it is beneficial to improve the assembly efficiency.

[0050] Optionally, continue to refer to Figures 2-4, in this embodiment, the terminal post 300 includes a first base portion 310 and a first column portion 320 that are connected to each other. The first base portion 310 and the tab 21 are both in a flat plate shape, and the side of the first base portion 310 facing away from the first column portion 320 is attached to the end face of the tab 21 facing away from the electrode group 20. The first base portion 310 and the tab 21 are welded by penetration welding. The first column portion 320 passes through the second mounting hole 201 and is welded to the inner wall of the second mounting hole 201, and a weld seam 322 is formed between the outer wall of the first column portion 320 and the inner wall of the second mounting hole 201. On the one hand, the contact area between the first base portion 310 and the tab 21 is relatively large, ensuring the current-carrying performance. On the other hand, the welding of the second column portion 220 to the inner wall of the second mounting hole 201 realizes the sealing performance between the connection block 200 and the terminal post 300.

[0051] In this embodiment, the connection block 200 includes a second base portion 210, a second column portion 220, and a bending portion 230 that are connected in sequence. The second mounting hole 201 penetrates through the second base portion 210 and the second column portion 220. The second base portion 210 is pressed against the side of the top cover sheet 100 facing away from the electrode group 20. One end of the second column portion 220 that penetrates into the first mounting hole 101 is bent along the radial direction of the first mounting hole 101 (i.e., Figure 3 , Figure 4 the X-axis direction in

[0052] to form the bending portion 230. One side of the bending portion 230 is pressed against the side of the top cover sheet 100 facing the electrode group 20. The connection block 200 is fixed to the top cover sheet 100 through the bending portion 230 and the second base portion 210. The other side of the bending portion 230 is attached to the side of the first base portion 310 facing away from the tab 21, increasing the contact area between the connection block 200 and the terminal post 300, which helps to improve the current-carrying performance of the terminal post 300. Exemplarily, the bending portion 230 can be realized by pressing the end of the second column portion 220 facing away from the second base portion 210.

[0053] Continue to refer toFigure 3 and Figure 4 The insulating sealing assembly in this embodiment includes an upper plastic part 400, the second column part 220 of the connecting block 200 is penetrated by the upper plastic part 400, the upper plastic part 400 is provided with a receiving groove 401, and the second base part 210 of the connecting block 200 is at least partially received in the receiving groove 401. The upper plastic part 400 is sandwiched between the end surface of the top cover sheet 100 away from the pole group 20 and the second base part 210, and the insulation between the connecting block 200 and the end surface of the top cover sheet 100 away from the pole group 20 is achieved by the upper plastic.

[0054] The insulating sealing assembly includes a lower plastic part 500, the second column part 220 is passed through the lower plastic part 500, and the bent part 230 formed after the second column part 220 is bent presses the lower plastic part 500 against the end face of the top cover sheet 100 close to the pole group 20. The lower plastic part 500 is sandwiched between the end face of the top cover sheet 100 close to the pole group 20 and the bent part 230, and the insulation between the connecting block 200 and the end face of the top cover sheet 100 close to the pole group 20 is achieved by the lower plastic part 500. Optionally, a support rib 501 is provided on the side of the lower plastic part 500 facing the pole group 20, and a support rib 501 is provided along the axial direction (i.e., the first mounting hole 101) of the first mounting hole 101. Figure 3 , Figure 4 The support rib 501 abuts against one end of the pole group 20 close to the top cover sheet 100, and the support rib 501 supports the top cover sheet 100 to improve its fixing stability. Figure 3 , Figure 4 The support rib 501 abuts against the end of the bent portion 230 and the end of the first base portion 310 of the pole 300, and the support rib 501 limits the pole 300 and the connecting block 200, thereby improving the assembly accuracy.

[0055] Furthermore, the insulating sealing assembly also includes a sealing member 600, which is made of an elastic material, for example, the sealing member 600 can be made of a rubber material, and has a certain elastic deformation capability. The sealing member 600 is sleeved on the second column portion 220 of the connecting block 200 and is arranged in the first mounting hole 101. After the second column portion 220 of the connecting block 200 is bent, the sealing member 600 is sandwiched between the second column portion 220 and the top cover sheet 100, and between the second column portion 220 and the lower plastic member 500 along the radial direction of the first mounting hole 101, and the two ends of the sealing member 600 along the axial direction of the first mounting hole 101 are respectively abutted against the upper plastic member 400 and the side of the bending portion 230 away from the pole group 20, and the sealing member 600 is compressed, thereby achieving the sealing of the first mounting hole 101.

[0056] See also Figures 5-7, the battery cover assembly in this embodiment can be a positive cover. The terminal post 300 on the positive cover is the positive terminal post 300a, and the positive terminal post 300a is connected to the positive tab 21a of the electrode group 20. A third mounting hole 102 is provided on the top cover sheet 100 of the positive cover, and an explosion-proof valve 30 is provided in the third mounting hole 102. The pressure relief function of the battery cover assembly is realized through the explosion-proof valve 30. Optionally, a protective film 31 is further provided on one side of the top cover sheet 100 away from the electrode group 20. The protective film 31 is bonded to the end face of the top cover sheet 100 on the side away from the electrode group 20, and the protective film 31 can block the third mounting hole 102, thereby playing a role in dust prevention and protection for the explosion-proof valve 30. See Figures 8-10 , the battery cover assembly can be a negative cover. The terminal post 300 on the negative cover is the negative terminal post 300b, and the negative terminal post 300b is connected to the negative tab 21b of the electrode group 20. A liquid injection hole 103 is provided on the top cover sheet 100 of the negative cover. Electrolyte can be injected into the battery case 10 through the liquid injection hole 103. After the injection is completed, a sealing nail (not shown in the figure) can be pressed into the liquid injection hole 103 to seal the liquid injection hole 103. It should be noted that at this time, the positive tab 21a and the negative tab 21b of the terminal post 300 are arranged at both ends of the electrode group 20, and both the positive tab 21a and the negative tab 21b are made by the process of flattening and are both in a flat plate shape.

[0057] Of course, in other embodiments, a liquid injection hole 103 can also be provided on the top cover sheet 100 of the positive cover, and a third mounting hole 102 can be provided on the top cover sheet 100 of the negative cover. Or the liquid injection hole 103 and the third mounting hole 102 are arranged on the top cover sheet 100 of the positive cover at the same time. Or the liquid injection hole 103 and the third mounting hole 102 are arranged on the top cover sheet 100 of the negative cover at the same time.

[0058] Or, in some embodiments, the battery cover assembly can also arrange the positive terminal post 300a and the negative terminal post 300b at the same time. At this time, two first mounting holes 101 are provided on the top cover sheet 100 of the battery cover assembly, and two connecting blocks 200 and insulating sealing components are also provided correspondingly. One connecting block 200 and one insulating sealing component are provided in each first mounting hole 101. The positive terminal post 300a is welded and connected to the inner wall of the second mounting hole 201 of one of the connecting blocks 200, and the negative terminal post 300b is welded and connected to the inner wall of the second mounting hole 201 of the other connecting block 200. At this time, the positive tab 21a and the negative tab 21b of the terminal post 300 are arranged at the same end of the electrode group 20, and both the positive tab 21a and the negative tab 21b are also made by the process of flattening and are both in a flat plate shape.

[0059] This embodiment also provides a battery, which includes a housing 10, a battery cell group 20, and the above-mentioned battery cover assembly. An opening is provided on the housing 10, and the battery cover assembly seals the opening, and the battery cell group 20 is arranged inside the housing 10. By adopting this battery cover assembly, on the one hand, the tab 21 is attached to the end face of the battery cell group 20, and the tab 21 does not need to be bent, saving the space in the height direction of the battery. The energy density of the battery is relatively high under the same volume. At the same time, since there is no need for the tab 21 bending process, the processing and assembly steps can be simplified, and the assembly efficiency can be improved.

[0060] Exemplarily, referring to Figure 11 and Figure 12 , the battery in this embodiment is a blade battery. Both ends of the blade battery in the length direction ( Figure 12 the Z-axis direction in Figure 12 the Z-axis direction in

[0061] Of course, in other embodiments, the battery can also be a square battery. The housing 10 of the square battery can be provided with two openings, and the setting structures of the corresponding battery cover assembly and the battery cell group 20 are the same as those of the above-mentioned blade battery.

[0062] Alternatively, in some embodiments, the battery can be a square battery. The housing 10 of the square battery can be provided with one opening, and there is one battery cover assembly. The top cover sheet 100 of the battery cover assembly is provided with both a positive electrode post 300a and a negative electrode post 300b at the same time. The positive tab 21a and the negative tab 21b of the battery cell group 20 are arranged on the same side. The positive electrode post 300a is connected to the positive tab 21a, and the negative electrode post 300b is connected to the negative tab 21b.

[0063] Obviously, the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

[0064] Note that in the description of this specification, the descriptions referring to the reference terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A battery cover assembly, characterized in that: include: A top cover sheet (100) is provided with a first mounting hole (101); A connecting block (200) is partially inserted into the first mounting hole (101), and two ends of the connecting block (200) are respectively pressed against opposite end surfaces of the top cover sheet (100) along the axial direction of the first mounting hole (101), and a second mounting hole (201) is provided on the connecting block (200); A pole (300), one end of which is connected to a pole ear (21) of a pole group (20), and the other end of which is passed through the second mounting hole (201) and welded to an inner wall of the second mounting hole (201); An insulating sealing component is sandwiched between the connecting block (200) and the top cover sheet (100).

2. The battery cover assembly according to claim 1, characterized in that: The pole (300) comprises a first base portion (310) and a first column portion (320) which are connected to each other; the first base portion (310) and the pole lug (21) are both in the shape of a flat plate; a side of the first base portion (310) facing away from the first column portion (320) is in contact with the pole lug (21); the first column portion (320) is inserted into the second mounting hole (201) and is welded to the inner wall of the second mounting hole (201).

3. The battery cover assembly according to claim 2, characterized in that: The connecting block (200) comprises a second base portion (210) and a second column portion (220) which are connected in sequence; the second mounting hole (201) passes through the second base portion (210) and the second column portion (220); the second base portion (210) is pressed against a side of the top cover sheet (100) which is away from the pole group (20); one end of the second column portion (220) which passes through the first mounting hole (101) is bent along the radial direction of the first mounting hole (101) to form a bent portion (230); one side of the bent portion (230) is pressed against a side of the top cover sheet (100) which is toward the pole group (20); and the other side of the bent portion (230) is in contact with a side of the first base portion (310) which is away from the pole lug (21).

4. The battery cover assembly according to claim 3, characterized in that: A first guide surface (221) is formed at the connection between the second column portion (220) and the bent portion (230), and a second guide surface (321) is provided at one end of the first column portion (320) inserted into the second mounting hole (201).

5. The battery cover assembly according to claim 3, characterized in that: The insulating sealing assembly comprises an upper plastic part (400), the second column part (220) is inserted through the upper plastic part (400), and the upper plastic part (400) is clamped between the end surface of the top cover sheet (100) facing away from the pole group (20) and the second base part (210).

6. The battery cover assembly according to claim 5, characterized in that: The insulating sealing component comprises a lower plastic part (500), the second column part (220) is inserted through the lower plastic part (500), and the lower plastic part (500) is sandwiched between the end surface of the top cover sheet (100) close to the pole group (20) and the bent part (230).

7. The battery cover assembly according to claim 6, characterized in that: The insulating sealing assembly comprises a sealing member (600), wherein the sealing member (600) is sleeved on the second column portion (220) and sandwiched between the second column portion (220) and the top cover sheet (100).

8. The battery cover assembly according to claim 1, characterized in that: The top cover sheet (100) is provided with a third mounting hole (102), and an explosion-proof valve (30) is provided in the third mounting hole (102); And / or, a liquid injection hole (103) is provided on the top cover sheet (100), and a sealing nail is provided in the liquid injection hole (103).

9. A battery, characterized in that: It comprises a shell (10) and a battery cover assembly according to any one of claims 1 to 8, wherein the shell (10) is provided with an opening, and the battery cover assembly is sealed at the opening.

10. The battery according to claim 9, characterized in that The housing (10) is provided with openings on opposite sides thereof, and two battery cover assemblies are provided, and the two battery cover assemblies are respectively sealed at one of the openings.

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