Battery cover plate and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery cover plate and a battery, the battery cover plate comprises a top cover sheet, a first plastic part, a second plastic part, an aluminum block, a pole and an elastic fixing part. The post comprises a plate body part and a post body part, and the post body part sequentially penetrates through the second plastic part, the top cover sheet, the first plastic part and the aluminum block and then is connected with the elastic fixing part in a clamping manner. Therefore, the first plastic part, the second plastic part and the aluminum block can be fixed on the top cover plate through the elastic fixing part and the plate body part of the pole, the assembly structure is reliable and stable, and the bad phenomenon possibly occurring in the welding process is avoided. And meanwhile, the pole and the elastic fixing piece can be flexibly disassembled and assembled, so that the replaceability of parts is improved, and the cost is reduced. The utility model further provides a battery which comprises the battery cover plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery cover plate and battery. BACKGROUND

[0002] At present, the battery cover plate of the power battery, the pole is generally assembled on the top cover sheet through the riveting and welding connection mode, although the connection structure is excellent in realizing the fixed function, but the stability of the processing process is poor, the welding hole, the fire, the virtual welding and the welding deviation and other adverse phenomena are frequently caused when the pole and the aluminum block are welded, directly causing the production yield to slide, and the cost to rise. In addition, the parts of the defective product caused by the poor welding of the pole and the aluminum block are difficult to replace, which further improves the scrap cost.

[0003] Therefore, an urgent need for a battery cover plate and battery to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a battery cover plate and battery, which replaces the traditional welding process with a mechanical connection mode, and the pole and the aluminum block are detachable and free from welding, greatly improving the assembly yield and reducing the cost.

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

[0006] On the one hand, the utility model provides a battery cover plate, comprising:

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

[0008] A first plastic part and a second plastic part are arranged on both sides of the top cover sheet respectively;

[0009] An aluminum block is arranged on the side of the first plastic part away from the top cover sheet;

[0010] A pole comprises a plate body part and a column body part, the first end of the column body part is connected with the plate body part, the second end of the column body part sequentially passes through the second plastic part, the first mounting hole, the first plastic part and the aluminum block, an annular groove is arranged on the circumferential wall of the column body part, and a first limiting part is arranged on the bottom wall of the annular groove;

[0011] An elastic fixing part is clamped with the annular groove, a second limiting part is arranged on the elastic fixing part, and the first limiting part and the second limiting part are embedded with each other.

[0012] Optionally, the elastic fixing part is a clamping spring, the clamping spring is C-shaped, and the second limiting part is arranged on the inner circumferential wall of the clamping spring.

[0013] Optionally, the first limiting part is a limiting groove, and the second limiting part is a limiting protrusion, and the limiting protrusion is embedded in the limiting groove.

[0014] Optionally, a bottom wall of the annular groove is in a cylindrical shape, and an end face of the limiting protrusion towards a side of the pole column is an arc face, and the arc face is attached to the bottom wall of the annular groove.

[0015] Optionally, a plurality of first limiting parts are arranged at intervals in a circumferential direction of the pole column, a plurality of second limiting parts are arranged at intervals in a circumferential direction of the elastic fixing part, and the first limiting parts and the second limiting parts correspond to each other and are embedded in each other.

[0016] Optionally, a first groove wall, which is away from the plate body part, of the annular groove has an included angle α with a central axis of the plate body part, the included angle α is in a range of 75°≤α≤90°, a first end face of the elastic fixing part, which cooperates with the first groove wall, is arranged to be inclined, and the first end face is attached to the first groove wall.

[0017] Optionally, the battery cover plate further comprises a sealing part, the sealing part is clamped between the pole column and the top cover sheet, the sealing part comprises a first sealing part, a second sealing part and a third sealing part, the second sealing part is located in a circumferential direction of the first sealing part, and the third sealing part is located in a circumferential direction of the second sealing part.

[0018] Optionally, a first accommodating groove is arranged on a side of the first plastic part towards the aluminum block, and at least part of the aluminum block is located in the first accommodating groove.

[0019] Optionally, a second accommodating groove is arranged on a side of the top cover sheet towards the first plastic part, and at least part of the first plastic part is located in the second accommodating groove.

[0020] Optionally, the first plastic part is provided with a first through hole and a first limiting rib, the columnar part is arranged to pass through the first through hole, the first limiting rib is arranged in a circumferential direction of the first through hole, and the first limiting rib extends into the first mounting hole.

[0021] Optionally, the second plastic part is provided with a second through hole and a second limiting rib, the columnar part is arranged to pass through the second through hole, the second limiting rib is arranged in a circumferential direction of the second through hole, and the second limiting rib abuts against a circumferential side wall of the plate body part.

[0022] In another aspect, the utility model provides a kind of battery, comprising the battery cover plate in any scheme above.

[0023] The utility model has the advantages that:

[0024] The utility model provides a battery cover plate, including top cover piece, first plastic piece, second plastic piece, aluminium block, pole and elastic fixing piece. Top cover piece is equipped with first mounting hole, and pole includes plate body part and column body part, and the first end of column body part is connected with plate body part, and the second end of column body part passes through second plastic piece, first mounting hole, first plastic piece and aluminium block in proper order and is connected with elastic fixing piece and is connected with the clamping. By this, through the plate body part of elastic fixing piece and pole, first plastic piece, second plastic piece and aluminium block can be fixed on top cover piece, and the assembly structure is reliable and stable, and the bad phenomenon that can appear in the welding process is avoided. Meanwhile, pole and elastic fixing piece can be flexibly disassembled, improve the replaceability of part, and reduce the cost.

[0025] Further, the first limiting part is arranged on the column body part, and the second limiting part is arranged on the elastic fixing part, and the first limiting part and the second limiting part are embedded with each other. Through cooperation of the first limiting part and the second limiting part, positioning between the elastic fixing part and the column body part of the pole is accurate, installation direction and installation position of the elastic fixing part are ensured to be correct, assembly yield is higher, and assembly precision is higher.

[0026] The utility model also provides a battery, including above-mentioned battery cover plate. By adopting the battery cover plate, product badness caused by the welding process in the traditional assembly structure is avoided, the whole assembly process is simple, and assembly is convenient, and assembly efficiency is higher, and the pole in the battery cover plate can be flexibly disassembled, and the scrap cost is reduced, and the economy is good. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment of the utility model, and obviously, the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled in the art, under the premise of not paying the creative labor, other drawings can be obtained according to the content of the embodiment of the utility model and these drawings.

[0028] Figure 1 It is the explosion map of the battery cover plate provided in the embodiment one of the utility model;

[0029] Figure 2 It is the plan view of the battery cover plate provided in the embodiment one of the utility model;

[0030] Figure 3 It is Figure 2 the sectional view of A-A section in

[0031] Figure 4 It is Figure 3 the local enlarged view of B in

[0032] Figure 5 It is the structure schematic view of the pole provided in the embodiment one of the utility model;

[0033] Figure 6 is the front view of the pole provided in the embodiment one of the utility model;

[0034] Figure 7 is Figure 6 the section view of C-C section in the embodiment one of the utility model;

[0035] Figure 8 is the structure schematic view of the elastic fixing piece provided in the embodiment one of the utility model;

[0036] Figure 9 is the section view of the pole and the elastic fixing piece after assembly provided in the embodiment one of the utility model;

[0037] Figure 10 is the partial section view of the battery cover plate provided in the embodiment two of the utility model.

[0038] In the drawing:

[0039] 100, top cover sheet;101, first mounting hole;110, second accommodating groove;200, first plastic piece;201, first through hole;210, first accommodating groove;220, first limiting rib;300, second plastic piece;301, second through hole;310, second limiting rib;400, aluminum block;401, third through hole;500, pole;510, plate body part;520, column body part;521, annular groove;5211, bottom wall;5212, first limiting part;5213, first groove wall;600, elastic fixing piece;610, second limiting part;611, arc face;612, first end face;700, sealing piece;710, first sealing part;720, second sealing part;730, third sealing part. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the utility model embodiment, rather than all the embodiments. The components of the utility model embodiment described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0042] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it should not require further defining and explaining in subsequent views.

[0043] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0044] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "connect" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "above", "upper" and "upper surface" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under surface" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0047] Embodiment one

[0048] As Figures 1-4As shown, the battery cover plate provided by the embodiment includes a top cover sheet 100, a first plastic piece 200, a second plastic piece 300, an aluminum block 400, a pole 500, and an elastic fixing piece 600. The first plastic piece 200 and the second plastic piece 300 are respectively arranged on two sides of the top cover sheet 100, and the aluminum block 400 is arranged on a side of the first plastic piece 200 away from the top cover sheet 100. The top cover sheet 100 is provided with a first mounting hole 101, the pole 500 includes a plate body part 510 and a column body part 520, a first end of the column body part 520 is connected with the plate body part 510, and a second end of the column body part 520 is connected with the elastic fixing piece 600 in sequence after passing through the second plastic piece 300, the first mounting hole 101, the first plastic piece 200, and the aluminum block 400.

[0049] Specifically, an annular groove 521 is arranged on a circumferential wall of the column body part 520, and the elastic fixing piece 600 can be clamped into the annular groove 521, so that the first plastic piece 200, the second plastic piece 300, and the aluminum block 400 can be fixed on the top cover sheet 100 through the elastic fixing piece 600 and the plate body part 510 of the pole 500. In this way, the process of welding the pole 500 and the aluminum block 400 in the prior art is successfully replaced, which not only enhances the reliability and stability of the structure, but also fundamentally avoids various adverse phenomena that may occur in the welding process. In addition, in the above mounting structure, the pole 500 and the elastic fixing piece 600 can be flexibly disassembled, which improves the replaceability of the parts and provides strong support for reducing costs.

[0050] Further, referring to Figures 5-9 In the embodiment, a first limiting part 5212 is arranged on a bottom wall 5211 of the annular groove 521, and a second limiting part 610 is arranged on the elastic fixing piece 600, and the first limiting part 5212 and the second limiting part 610 are embedded with each other. Through the cooperation of the first limiting part 5212 and the second limiting part 610, the positioning between the elastic fixing piece 600 and the column body part 520 of the pole 500 is accurate, the installation direction and installation position of the elastic fixing piece 600 are ensured to be correct, the assembly yield is high, and the assembly precision is high. At the same time, in the subsequent use process, the elastic fixing piece 600 cannot rotate relative to the column body part 520 due to the mutual limiting between the first limiting part 5212 and the second limiting part 610, which further ensures that the stability and reliability of the pole 500 fixed on the top cover sheet 100 are high, and the pole 500 is not easy to be loosened from the top cover sheet 100.

[0051] The elastic fixing piece 600 can be a clasp spring, the clasp spring is in a C shape, one side of the clasp spring is provided with an opening, and the column body part 520 of the pole 500 can pass through the opening side of the clasp spring due to the deformation ability of the clasp spring, and the clasp spring is clamped into the annular groove 521 on the column body part 520, so that the assembly between the pole 500 and the elastic fixing piece 600 is realized.

[0052] Further, the first limiting part 5212 on the pole column 500 can be a limiting groove, and a second groove wall on the side away from the plate body part 510 and a first groove wall 5213 on the side away from the plate body part 510 of the annular groove 521 are located in the same plane. Since there is no obvious boundary between the second groove wall and the first groove wall 5213, only the first groove wall 5213 is identified in Figure 4 . The groove bottom of the limiting groove is lower than the bottom wall 5211 of the annular groove 521. The second limiting part 610 is provided on the inner circumferential wall of the snap spring, and the second limiting part 610 is a limiting protrusion embedded in the limiting groove. The positioning between the pole column 500 and the elastic fixing part 600 is realized through the cooperation of the limiting protrusion and the limiting groove, and the assembly precision of the battery cover plate is ensured to be high.

[0053] Continuing to refer to Figure 8 and Figure 9 , the bottom wall 5211 of the annular groove 521 in the column body part 520 of the pole column 500 is in a cylindrical shape, the end face of the limiting protrusion on the side of the pole column 500 is an arc surface 611, and the arc surface 611 is in close contact with the bottom wall 5211 of the annular groove 521. Therefore, the cooperation between the elastic fixing part 600 and the pole column 500 is more compact, and the pole column 500 and the elastic fixing part 600 are not prone to shaking after assembly, and the pole group is fixed stably and reliably on the top cover sheet 100.

[0054] And the first limiting part 5212 can be provided with a plurality of first limiting parts 5212 arranged in the circumferential direction of the pole column 500; the second limiting part 610 is also provided with a plurality of second limiting parts 610 arranged in the circumferential direction of the elastic fixing part 600, and the first limiting part 5212 and the second limiting part 610 correspond to each other and are embedded in each other. Exemplarily, three first limiting parts 5212 are provided for the first limiting part 5212, and three second limiting parts 610 are provided for the second limiting part 610. Among them, in the cross section perpendicular to the central axis of the pole column 500, the three first limiting parts 5212 in the annular groove 521 are distributed on a semicircle, and the included angle between the adjacent two first limiting parts 5212 is 90°. Correspondingly, the three second limiting parts 610 on the inner circumferential wall of the snap spring are located on a semicircle on the side opposite to the opening on the snap spring, and the included angle between the adjacent two second limiting parts 610 is also 90°. Therefore, the pole column 500 and the elastic fixing part 600 can be tightly cooperated, and the positioning effect is good.

[0055] Continuing to refer to Figure 1 and Figure 4The battery cover plate in the embodiment further comprises a sealing member 700, which is sleeved on the cylindrical portion 520 of the pole 500 and is clamped between the pole 500 and the top cover sheet 100. The sealing member 700 comprises a first sealing portion 710, a second sealing portion 720 and a third sealing portion 730. The second sealing portion 720 is located in the circumferential direction of the first sealing portion 710, and the third sealing portion 730 is located in the circumferential direction of the second sealing portion 720. The first sealing portion 710 is used to seal the gap between the cylindrical portion 520 of the pole 500 and the first plastic member 200 and the top cover sheet 100, the second sealing portion 720 is used to seal the gap between the top cover sheet 100 and the cylindrical portion 520, and the third sealing portion 730 is used to seal the gap between the plate body portion 510 of the pole 500 and the second plastic member 300. Optionally, the sealing member 700 can be made of a material with certain elastic deformation capacity, such as rubber.

[0056] During assembly, the second end of the cylindrical portion 520 of the pole 500 is sequentially inserted through the sealing member 700, the second through hole 301 on the second plastic member, the first mounting hole 101 on the top cover sheet 100, the first through hole 201 on the first plastic member 200, and the third through hole 401 on the aluminum block 400. Then, the plate body portion 510 of the pole 500 is pushed towards the top cover sheet 100 by using the cylinder of the jig, so as to compress the sealing member 700 in the axial direction of the first mounting hole 101 (i.e., the Z-axis direction shown in FIG. 6). Figure 1 When the sealing member 700 is compressed to a specified position, the circlip is pressed into the annular groove 521 of the pole 500, and the first limiting portion 5212 and the second limiting portion 610 are embedded with each other, so as to finally complete the mechanical connection between the pole 500 and the circlip. By using the rebound force of the compressed sealing member 700, it can be ensured that the pole 500 and the circlip are tightly and stably connected, which effectively prevents the pole 500 from falling off, and the reliability of the battery cover plate assembly is high.

[0057] Optionally, the first plastic member 200 in the embodiment is provided with a first accommodating groove 210 on the side facing the aluminum block 400, and at least part of the aluminum block 400 is located in the first accommodating groove 210. Through the cooperation of the first accommodating groove 210 and the aluminum block 400, on the one hand, the positioning accuracy between the aluminum block 400 and the first plastic member 200 can be improved, and the assembly yield can be improved; on the other hand, the overall thickness of the battery cover plate can be reduced, which is beneficial to save space and improve the energy density of the battery. Further, the top cover sheet 100 is provided with a second accommodating groove 110 on the side facing the first plastic member 200, and at least part of the first plastic member 200 is located in the second accommodating groove 110. Through the cooperation of the second accommodating groove 110 and the first plastic member 200, on the one hand, the positioning accuracy between the top cover sheet 100 and the first plastic member 200 can be improved, and the assembly yield can be improved; on the other hand, the overall thickness of the battery cover plate can be further reduced, which is beneficial to save space and improve the energy density of the battery.

[0058] More preferably, in this embodiment, the first plastic part 200 is provided with a first through hole 201 and a first limiting rib 220. The column part 520 passes through the first through hole 201, and the first limiting rib 220 is disposed in the circumferential direction of the first through hole 201. The first limiting rib 220 extends into the first mounting hole 101. By cooperating with the inner wall of the first mounting hole 101, the precise positioning between the first plastic part 200 and the top cover plate 100 can be achieved, which is beneficial to improving the assembly accuracy and assembly yield of the battery cover plate. Further, the second plastic part 300 is provided with a second through hole 301 and a second limiting rib 310. The column part 520 passes through the second through hole 301, and the second limiting rib 310 is disposed in the circumferential direction of the second through hole 301. The second limiting rib 310 abuts against the circumferential side wall of the plate part 510. By cooperating with the plate portion 510 of the pole post 500, the second plastic part 300 and the pole post 500 can be precisely positioned, which is beneficial to improving the assembly accuracy and assembly yield of the battery cover.

[0059] This embodiment also provides a battery, including a casing, an electrode assembly, and the aforementioned battery cover. The battery cover is connected to the casing and together with the casing, forms an installation space for placing the electrode assembly. The electrode tabs of the electrode assembly are connected to the terminal posts 500 on the battery cover, thereby connecting the electrode assembly to an external circuit and enabling charging and discharging of the electrode assembly. By using the battery cover in this embodiment, a mechanical connection method replaces the traditional welding process, simplifying the assembly process, facilitating assembly, and increasing assembly efficiency. Furthermore, the terminal posts 500 in the battery cover can be flexibly disassembled and reassembled, reducing scrap costs and demonstrating good economic efficiency.

[0060] Example 2

[0061] This embodiment also provides a battery cover, see [link / reference] Figure 10 The difference between this embodiment and the battery cover in Embodiment 1 is that the first groove wall 5213 on the side of the annular groove 521 facing away from the plate body 510 has an included angle α with the central axis of the plate body 510, and the value of α is in the range of 75°≤α≤90°. For example, the value of α can be 75°, 80°, 82°, 85° or 90°, etc. More preferably, the value of α is in the range of 80°≤α≤85°. The first end face 612 of the elastic fastener 600 that cooperates with the first groove wall 5213 is inclined, and the first end face 612 fits against the first groove wall 5213. By inclining the first groove wall 5213 on the side of the annular groove 521 facing away from the plate body 510 and the first end face 612 of the elastic fastener 600 that cooperates with the first groove wall 5213, the elastic fastener 600 has a certain guiding force when it is installed into the annular groove 521, making assembly easier and improving assembly efficiency.

[0062] The embodiment also provides a battery, which comprises a shell, a pole group and the battery cover plate.

[0063] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery cover plate, characterized by, The utility model relates to a kind of battery terminal, including: Top cover sheet (100), first mounting hole (101) is equipped on the top cover sheet (100); First plastic piece (200) and second plastic piece (300), the first plastic piece (200), the second plastic piece (300) are respectively arranged on the two sides of the top cover sheet (100); Aluminum block (400), is arranged on the side of the first plastic piece (200) away from the top cover sheet (100); Pole (500), including plate body part (510) and column body part (520), the first end of the column body part (520) is connected with the plate body part (510), the second end of the column body part (520) sequentially passes through the second plastic piece (300), the first mounting hole (101), the first plastic piece (200) and the aluminum block (400);Annular groove (521) is equipped on the circumferential wall of the column body part (520), the bottom wall (5211) of the annular groove (521) is equipped with first limiting part (5212); Elastic fixing piece (600) is clamped with the annular groove (521), the second limiting part (610) is equipped on the elastic fixing piece (600), the first limiting part (5212) and the second limiting part (610) are mutually embedded.

2. The battery cover plate of claim 1, wherein, The elastic fixing piece (600) is a snap spring, the second limiting part (610) is arranged on the inner circumferential wall of the snap spring.

3. The battery cover plate of claim 2, wherein, The first limiting part (5212) is a limiting groove, and the second limiting part (610) is a limiting protrusion embedded in the limiting groove.

4. The battery cover plate of claim 3, wherein, The bottom wall (5211) of the annular groove (521) is in a cylindrical shape, and the end face of the limiting protrusion towards the side of the pole (500) is an arc face (611), and the arc face (611) is attached to the bottom wall (5211) of the annular groove (521).

5. The battery cover plate of claim 1, wherein, The first limiting part (5212) is provided with a plurality of first limiting parts (5212), and the plurality of first limiting parts (5212) are arranged in a circumferential direction of the pole (500). The second limiting part (610) is provided with a plurality of second limiting parts (610), and the plurality of second limiting parts (610) are arranged in a circumferential direction of the elastic fixing piece (600). The first limiting part (5212) and the second limiting part (610) correspond to each other and are embedded.

6. The battery cover plate of claim 1, wherein, The first groove wall (5213) away from the plate body part (510) on the side of the annular groove (521) has an included angle α with the central axis of the plate body part (510), and the value of α is in the range of 75°≤α≤90°. The first end face (612) of the elastic fixing piece (600) cooperates with the first groove wall (5213) is inclinedly arranged, and the first end face (612) is attached to the first groove wall (5213).

7. The battery cover plate of claim 1, wherein, The battery cover plate further comprises a sealing piece (700) clamped between the pole column (500) and the top cover sheet (100), the sealing piece (700) comprising a first sealing part (710), a second sealing part (720) and a third sealing part (730), the second sealing part (720) being located in the circumferential direction of the first sealing part (710), and the third sealing part (730) being located in the circumferential direction of the second sealing part (720).

8. The battery cover plate of claim 1, wherein, A first accommodating groove (210) is arranged on one side of the first plastic part (200) facing the aluminum block (400), and at least part of the aluminum block (400) is located in the first accommodating groove (210); And / or, a second accommodating groove (110) is arranged on one side of the top cover sheet (100) facing the first plastic part (200), and at least part of the first plastic part (200) is located in the second accommodating groove (110).

9. The battery cover plate of claim 1, wherein, The first plastic part (200) is provided with a first through hole (201) and a first limiting rib (220), the columnar part (520) is arranged in the first through hole (201), and the first limiting rib (220) is arranged in the circumferential direction of the first through hole (201) and extends into the first mounting hole (101); And / or, the second plastic part (300) is provided with a second through hole (301) and a second limiting rib (310), the columnar part (520) is arranged in the second through hole (301), and the second limiting rib (310) is arranged in the circumferential direction of the second through hole (301) and abuts against the circumferential side wall of the plate body part (510).

10. A battery, characterized by The battery cover plate according to any one of claims 1-9. The battery cover plate according to any one of claims 1-9.

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