Battery top cover

Abstract

The utility model discloses a battery top cover which comprises a top cover piece, a pole and a connecting piece, a pole riveting piece is arranged on the top cover piece, and the pole riveting piece comprises a riveting piece and a first pole hole; the first pole hole is of a special-shaped structure, a lower pole corresponding to the special-shaped structure is arranged on the bottom surface of the pole, and at least part of the lower pole is assembled in the first pole hole to limit rotation of the pole; and a sealing piece is arranged between the pole and the pole riveting piece. According to the battery top cover disclosed by the utility model, the lower pole and the first pole hole are arranged into corresponding special-shaped structures for limiting rotation, and the pole is fixed on the top cover by riveting the pole riveting piece.

Description

Technical Field

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

[0002] The power battery cover is mainly used in the power battery of new energy vehicles to install the pole for the input and output of battery power. There are many pole assembly methods in the technology, and riveting is one of them. However, for the riveting fastening method, it is necessary to prevent the pole from rotating relative to the cover sheet.

[0003] For example, Chinese utility model patent 202221342674.6 discloses an injection riveted structure of a battery top cover and a battery top cover assembly, which achieve the purpose of preventing the pole from rotating by the corresponding cooperation of the rivet 42 and the rivet hole 23; another example is the notch-type injection riveted structure of the battery top cover and the battery top cover disclosed in Chinese utility model patent 202221608010.X, which also have a similar circumferentially concave and convex riveted column and a second rivet interface to achieve the purpose of preventing the pole from rotating.

[0004] However, such methods all require protruding rivet columns or similar structures to be provided on the top cover sheet, which will increase the processing complexity of the top cover sheet and reduce the yield rate.

[0005] In addition, in the above-mentioned existing patents, the upper plastic parts are formed by injection molding after riveting. After molding, the vertical riveting force on the pole is reduced, and more reserve volume needs to be reserved during the early riveting process, which will also increase the difficulty of processing and the yield rate needs to be improved. Utility Model Content

[0006] The purpose of the present invention is to solve at least one of the above problems and provide a battery top cover that is easy to manufacture and has an improved yield.

[0007] As a first aspect of the utility model, a battery top cover is provided, the top cover comprises a top cover sheet and a pole, wherein:

[0008] The top cover sheet is provided with a pole rivet, and the pole rivet comprises a rivet provided on the top cover sheet and a first pole hole penetrating through the top cover sheet.

[0009] The first pole hole is a special-shaped structure, a lower pole is provided on the bottom surface of the pole, the lower pole is a special-shaped structure corresponding to the first pole hole, and the lower pole is at least partially assembled in the first pole hole to limit the rotation of the pole. Generally speaking, the above-mentioned special-shaped structure refers to a general term for all non-circular structures, which have a common feature, that is, after the lower pole of the corresponding shape is at least partially arranged in the first pole hole, the pole cannot rotate relative to the top cover sheet.

[0010] A sealing member is provided between the pole and the pole rivet member, and the pole is riveted to the top cover sheet by the rivet member.

[0011] In addition, the battery top cover also includes a connecting piece, which is riveted to the pole rivet piece on one hand and connected to the pole on the other hand, so that the pole is indirectly riveted to the top cover sheet via the connecting piece. That is, the rivet piece on the top cover sheet rivets and fixes the pole via the connecting piece, which is different from the case where the rivet piece directly presses on the pole to rivet it when there is no connecting piece.

[0012] According to the battery top cover, the pole is provided with a concave or convex first positioning portion, and the connector is provided with a corresponding second positioning portion, and the first positioning portion and the second positioning portion cooperate in a concave-convex manner to limit the rotation of the pole and prevent the pole from rotating. Preferably, the second positioning portion can be formed during injection molding, or can be pre-fabricated during prefabricated insert processing.

[0013] Preferably, the connecting piece is made of insulating material, so that the pole and the top cover sheet are insulated and non-conductive.

[0014] Preferably, the connector is made of a conductive material so that the top cover sheet and the pole are electrically connected, which is generally used at the positive electrode of a lithium battery.

[0015] According to the above battery top cover, wherein: the first pole hole is a regular polygon hole, the first pole hole is a corresponding regular polygon shape, and the regular polygon is symmetrical with respect to the irregular polygon, so it can be beneficial for assembly positioning.

[0016] According to the above-mentioned battery top cover, wherein: the rivet member is a rivet ring protruding from the top cover sheet, which can be arranged continuously or at intervals, and the rivet member is arranged to be inclined inwardly or outwardly, so as to achieve the purpose of riveting and positioning with the connecting member.

[0017] Preferably, an injection molding recess is provided on the top cover sheet at the periphery of the riveted component, and at least one rivet hole is provided in the injection molding recess. When the connecting component is injection molded, the injection molding recess is covered by the connecting component and a further riveting structure is formed at the rivet hole to improve the fixing effect of the connecting component on the top cover sheet.

[0018] Optimally, the connector is formed by injection molding.

[0019] As a second aspect of the utility model, a battery top cover is also provided, comprising a top cover sheet and a pole, wherein:

[0020] The top cover sheet is provided with a pole rivet, and the pole rivet comprises a rivet provided on the top cover sheet and a first pole hole penetrating through the top cover sheet.

[0021] The first pole hole is a special-shaped structure, a lower pole is provided on the bottom surface of the pole, the lower pole is a special-shaped structure corresponding to the first pole hole, and the lower pole is at least partially assembled in the first pole hole to limit the rotation of the pole. The special-shaped structure also refers to a non-circular shape that can prevent the pole from rotating.

[0022] A sealing member is further provided between the pole and the pole rivet, and the rivet fixes the pole to the top cover sheet.

[0023] According to the battery top cover, the rivet can be a rivet ring protruding from the top cover sheet, which can be arranged continuously or at intervals, and after the pole is assembled, the rivet is bent inward to directly press against the pole. Therefore, the pole is fixed by the rivet directly pressing against the pole, and the purpose of preventing rotation and connecting is achieved by cooperating with the special-shaped lower pole and the first pole hole.

[0024] According to the above-mentioned battery top cover, it also includes a connecting piece, which is arranged between the pole and the rivet; the rivet is a rivet ring protruding from the top cover sheet, which is arranged continuously or at intervals, and after the pole is assembled, the rivet is bent inwardly to make it press against the connecting piece.

[0025] Wherein, the connecting piece may be made of insulating material or conductive material, and the connecting piece may be formed by injection molding or be a prefabricated insert.

[0026] By providing a connecting piece to transmit the force between the riveted piece and the pole, on the one hand, direct metal-to-metal contact between the riveted piece and the pole can be avoided, thereby improving the fixing effect of the pole; on the other hand, by setting the connecting piece to an insulating material, the pole and the top cover sheet can be insulated and non-conductive.

[0027] According to the battery top cover, wherein: the pole is provided with a concave or convex first positioning portion, the connecting member is correspondingly provided with a second positioning portion, and the first positioning portion and the second positioning portion cooperate with each other in concave and convex manner to limit the rotation of the pole.

[0028] Preferably, the connector is first formed into one piece with the pole by injection molding, and then the rivet is bent inwards after assembly to press against the connector. Compared with the process of first riveting and then injection molding, the solution of first injection molding and then riveting can avoid the adverse effect of high temperature on the seal during injection molding, which is conducive to improving the sealing performance and extending the service life.

[0029] According to the above battery top cover, wherein: the first pole hole can be a rectangular hole, a square hole, a triangular hole, a pentagonal hole, a hexagonal hole or an octagonal hole.

[0030] Preferably, the first pole hole may also be a regular polygonal hole with rounded corners.

[0031] Preferably, the first pole hole is a rounded square hole.

[0032] According to the battery top cover, the pole further comprises an upper pole and a pole convex ring, the pole convex ring is convex laterally relative to the upper pole and the lower pole, and whether the side surfaces of the upper pole and the lower pole are flush is not limited.

[0033] Preferably, the first positioning portion is disposed on one of the upper pole and the lower pole, or on both of them.

[0034] More preferably, the first pole hole is arranged in the riveted part and a step is formed between the two parts, and a first boss is protruded around the edge of the step, that is, the first boss is arranged around the first pole hole. In addition, the sealing member includes a first sealing part and a second sealing part, the first sealing part is used for sealing at the side wall of the first pole hole, and the second sealing part is used for sealing at the upper surface of the step.

[0035] Optimally, the connector may be made of insulating PPS or conductive PPS.

[0036] The battery top cover of the utility model has at least the following beneficial effects:

[0037] 1. The lower pole arranged below the pole and the first pole hole penetrating through the top cover sheet are of corresponding special-shaped structures, so that the assembled pole and the top cover sheet cannot be rotated, thereby achieving the need to set a direct or indirect rotation limiting structure between the pole and the pole rivet, achieving structural simplification and simplifying the assembly process.

[0038] 2. The rivet of the pole rivet is pre-set on the top cover sheet. Before riveting, the pole can be placed in the rivet and the lower pole is at least partially located in the first pole hole. Then, the rivet is subjected to one or more riveting processes to deform or bend the rivet inward, thereby achieving the purpose of riveting the pole to the top cover sheet.

[0039] 3. The sealing member acts between the pole and the pole rivet member, so that the pole and the top cover sheet are riveted in a sealing manner.

[0040] 4. A connector is preferably provided between the rivet and the pole. The connector can be made of insulating material or conductive material. The connector is preferably pre-injected with the pole, and then the two and the seal are assembled together before the rivet is subjected to riveting processing so that the rivet is bent inward to form a riveted connection. By pre-injection molding, the adverse effect of high temperature on the seal during injection molding can also be avoided.

[0041] 5. In a preferred embodiment, the seal has a first sealing portion and a second sealing portion, the first sealing portion acts on the side of the lower pole, and the second sealing portion acts on the lower surface of the pole convex ring to seal and rivet the pole.

[0042] 6. The processing difficulty of the battery top cover is reduced and the yield rate is improved, which is beneficial for industrial-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic structural diagram of a battery top cover of Embodiment 1 of the present utility model;

[0044] Figure 2 yes Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0045] Figure 3 yes Figure 1 A schematic diagram of the structure of the top cover sheet at the positive electrode column in the embodiment;

[0046] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure and a partial enlarged schematic diagram thereof;

[0047] Figure 5 yes Figure 1 A schematic diagram of the structure of the pole in the embodiment;

[0048] Figure 6 yes Figure 1 A top view of the battery top cover at the positive electrode column of the embodiment;

[0049] Figure 7 yes Figure 6 Section view along section AA;

[0050] Figure 8 yes Figure 6 Section view along section BB;

[0051] Fig. 9 yes Figure 1 A schematic cross-sectional structure diagram of a connecting member in an embodiment;

[0052] Fig.10It is a schematic structural diagram of a battery top cover of Embodiment 2 of the present utility model;

[0053] Fig.11 yes Fig.10 A cross-sectional view of the battery top cover at the positive electrode column of the embodiment and a partially enlarged schematic view thereof;

[0054] Fig.12 yes Fig.10 A schematic diagram of the structure of the top cover sheet at the positive electrode column in the embodiment;

[0055] Fig.13 yes Fig.10 The schematic diagram of the structural decomposition of the embodiment before riveting, at which time the upper pole is in an unriveted state.

[0056] Among them, the top cover sheet 100, the positive pole assembly 101, the negative pole assembly 102, the explosion-proof valve 103, the liquid injection port 104, the lower plastic part 200, the second pole hole 201, the connecting column 202, the pole 11, the connecting part 12, the sealing part 13, the pole rivet 14, the upper pole 111, the lower pole 112, the pole convex ring 113, the positioning recess 114, the rivet 141, the first pole hole 142, the first boss 143, the convex step 144, the injection recess 145, the rivet hole 146, the first sealing part 131 and the second sealing part 132. DETAILED DESCRIPTION

[0057] Combined with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the following embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field also fall within the scope of protection of the present invention.

[0058] Embodiment 1

[0059] like Figure 1-9As shown, a battery top cover for a lithium battery is composed of a top cover sheet 100, a lower plastic part 200, and a positive pole column assembly 101 and / or a negative pole column assembly 102 installed on the top cover sheet. Both the positive pole column assembly 101 and the negative pole column assembly 102 have poles 11. An explosion-proof valve 103 and a liquid injection port 104 are also provided on the top cover sheet 100, wherein the explosion-proof valve 103 includes a valve sheet (not shown in the figure) formed on the top cover sheet 100 and a protective patch attached to the valve sheet, so that the top cover sheet presents a flat structure. In this embodiment, the positive pole column assembly 101 and the negative pole column assembly 102 are located on the same top cover sheet 100, and the battery top cover is formed as an integrated top cover. In other embodiments, the positive pole column assembly 101 and the negative pole column assembly 102 can also be located on a top cover sheet 100 respectively, and the battery top cover is formed as a split top cover, that is, a positive pole top cover and a negative pole top cover are formed respectively. In industry applications, both the one-piece top cover and the split top cover are conventional structures and will not be described in detail.

[0060] like Figure 2 As shown, a pole rivet 14 is provided on the top cover sheet 100, a sealing member 13 is provided between the pole 11 and the top cover sheet 100, and a connecting member 12 is provided between the pole 11 and the pole rivet 14, wherein the sealing member 13 is used to seal between the pole 11 and the top cover sheet 100, and the connecting member 12 is used to connect the pole 11 to the pole rivet 14, which is riveted to the pole rivet 14 on the one hand and connected to the pole 11 on the other hand, so that the pole 11 is indirectly riveted to the top cover sheet 100 via the connecting member 12.

[0061] like Figure 3 As shown, the pole rivet 14 includes a rivet 141 protruding from the top cover sheet 100, and the rivet 141 is preferably integrally formed on the top cover sheet 100, for example, integrally formed by stamping, so as to rivet the pole 11 to the top cover sheet 100. The pole rivet 14 also includes a first pole hole 142 formed in the rivet 141 and penetrating the top cover sheet 100, and the first pole hole 142 is a non-circular special-shaped structure, for example, a polygonal shape, for rotationally limiting the pole 11; so that the lower pole 112 of the special-shaped structure can be rotationally limited with the first pole hole 142 of the corresponding shape. For example, in a preferred embodiment, the first pole hole 142 is a rounded square, so that the pole 11 can be realized from four directions during the assembly process.

[0062] Of course, in other embodiments, the first pole hole 142 may also be other polygonal shapes, such as rectangular holes, triangular holes, pentagonal holes, hexagonal holes, octagonal holes, etc., as long as they can prevent rotation. In other embodiments, the lower pole 112 and the first pole hole 142 are respectively spline-shaped protrusions and corresponding matching spline holes, which can also achieve the purpose of preventing rotation. Preferably, the first pole hole 142 is a regular polygonal hole, and the first pole hole 142 is a protrusion corresponding to the regular polygonal shape.

[0063] like Figure 3 As shown, preferably, a convex step 144 is formed between the first pole hole 142 and the rivet 141 for assembly and sealing of the seal 13. More preferably, a first boss 143 is formed around the first pole hole 142 and is convex relative to the convex step 144. The first boss 143 is arranged around the first pole hole 142 to further improve the assembly sealing performance of the seal 13.

[0064] Preferably, the rivet 141 is a convex ring and is continuously arranged in the circumferential direction to form a convex rivet ring, and the first pole hole 142 is arranged inside the rivet 141 and its size is smaller than the rivet 141 to form a convex step 144 between the two. In other embodiments, the rivet 141 can also be arranged discontinuously at intervals. The rivet 141 can be arranged inwardly or outwardly inclined.

[0065] Preferably, an injection molding recess 145 is provided outside the rivet 141 , and a rivet hole 146 is provided inside the injection molding recess 145 . The rivet hole 146 has a cross-sectional structure that is larger at the bottom and smaller at the top so as to form a rivet column 124 therein during the injection molding process of the connector 12 .

[0066] like Figure 5 As shown, the pole 11 includes an upper pole 111, a lower pole 112 and a pole convex ring 113 convexly arranged laterally. Preferably, the upper pole 111, the lower pole 112 and the pole convex ring 113 are formed in one piece. More preferably, the pole convex ring 113 is provided with a first positioning portion 114 which is concave or convexly arranged, and the connecting member 12 is correspondingly provided with a second positioning portion, and the first positioning portion 114 and the second positioning portion are matched in a concave-convex manner so that the rotation of the connecting member 12 is limited. For example, the first positioning portion 114 is a positioning concave, and 4 are evenly arranged along the circumferential direction. Since the cross-sectional views of the positioning concave at different positions along the circumferential direction are different, please refer to Figure 6-8 shown.

[0067] like Fig. 9As shown, the connector 12 is formed by injection molding, and includes a connector body 121 and a pole hole 122 formed in the connector body 121, wherein the pole hole 122 contains at least a portion of the pole therein, and a rivet column 124 and a rivet recess 123 are formed below the connector body 121, wherein the rivet recess 123 is used to contain at least a portion of the rivet 141 therein.

[0068] Preferably, the seal 13 includes a first sealing portion 131 and a second sealing portion 132, which are integrally formed to contact and seal the side wall of the first pole hole 142 and the upper surface of the step 144. Optimally, after riveting and fastening, the seal 13 is in a compressed state to further improve the sealing performance.

[0069] In a preferred embodiment, the battery top cover also includes a lower plastic part 200 fixedly connected to the bottom of the top cover sheet 100, and a second pole hole 201 corresponding to the first pole hole 142 is provided on the lower plastic part 200. The lower plastic part 200 is fixedly connected to the lower surface of the top cover sheet 100 through a connecting column 202. For example, the connecting column 202 is assembled into the corresponding connecting hole (not shown in the figure) on the lower surface of the top cover sheet 100 after hot-melt treatment, so as to achieve the fixed connection between the two.

[0070] In a preferred embodiment, the connector 12 can be made of an insulating material, such as insulating PPS (polyphenylene sulfide), and the seal 13 can be made of an insulating sealing material, such as rubber, preferably fluororubber. In other embodiments, the connector 12 can also be made of a conductive material, such as conductive PPS (polyphenylene sulfide). Whether the connector 12 is made of an insulating material or a conductive material can be set according to whether the corresponding pole is electrically connected to the top cover sheet 100.

[0071] Embodiment 2

[0072] like Figure 10-13 As shown, a battery top cover for a lithium battery has a main structure similar to that of the first embodiment, except that the connection method of the pole 11 is different. Specifically, in this embodiment, the positive pole assembly 101 and / or the negative pole assembly 102 are assembled to the top cover sheet 100 by a riveting structure, that is, the pole 11 is pressed and fixed by bending and deforming the rivet 141, and the process involves one or more punching and riveting processes on the rivet 141.

[0073] Specifically, in this embodiment, the pole 11 is first assembled in the rivet 141, and then the rivet 141 is riveted inward to bend inward so that the rivet 141 can fix the pole 11 to the top cover sheet 100, thereby directly or indirectly limiting the pole 11 so that it is fixed to the top cover sheet 100, wherein the rotation limitation of the pole 11 is also achieved by assembling the lower pole 112 of the same special-shaped structure and the first pole hole 142.

[0074] like Fig.10 As shown, in this embodiment, there is also a connecting member 12, which is arranged between the pole 11 and the rivet 141 to separate the two, so that the rivet 141 is indirectly fixed to the pole 11 via the connecting member 12; the rivet 141 can be a rivet ring protruding from the top cover sheet 100, and the rivet rings are arranged continuously or at intervals. After the pole 11 is placed in the rivet 141, the rivet 141 is bent inward so that it can be pressed on the connecting member 12 via the connecting member 12.

[0075] In other embodiments, the connector 12 may not be provided, but after the pole 11 is placed in the rivet 141, the rivet 141 is bent inward so that the rivet 141 directly presses against the pole 11, which can achieve the purpose of fixing the pole 11 when the pole 11 is electrically connected to the top cover sheet 11. For example, the rivet 141 after riveting directly contacts the pole convex ring 113 to rivet and fasten it.

[0076] In this embodiment, the connector 12 may be made of an insulating material or a conductive material to insulate or electrically connect the pole 11 to the top cover sheet 100. Specifically, the material may be set as needed. For example, the connector 12 may be made of a conductive material at some positive poles, or may be made of an insulating material at other positive poles, or may be made of an insulating material at the negative pole. Preferably, the connector 12 may be made of a conductive PPS or an insulating PPS.

[0077] In this embodiment, the connector 12 may be formed by injection molding or a prefabricated insert. Fig.13 As shown, in this embodiment, the connector 12 is firstly injection molded on the pole 11 so that the two form a whole, and the whole and the seal 13 are placed in the rivet 141, and then the rivet 141 is bent inwardly so that the rivet 141 presses on the connector 12 to form a Fig.11 The finished product structure shown in the figure can avoid the adverse effect of high temperature on the seal when the connector 12 is injection molded. Fig.13 As shown, before riveting, the rivet 141 is in a vertically protruding state to facilitate the integral placement of the connector 12 and the pole 11 therein.

[0078] The connection member 12 and the pole 11 are also rotationally limited by the concave-convex fit between the first positioning portion 114 and the second positioning portion.

[0079] The shape of the first pole hole 142 can be a rectangular hole, a square hole, a triangular hole, a pentagonal hole, a hexagonal hole or an octagonal hole, etc., which cannot be rotated after assembly. Preferably, the first pole hole 142 is a regular polygonal hole with rounded corners to facilitate the assembly of the top cover. Optimally, the first pole hole 142 is a rounded square hole.

Claims

1. A battery top cover, comprising a top cover sheet (100) and a pole (11), characterized in that: A pole rivet (14) is provided on the top cover sheet (100), and the pole rivet (14) comprises a rivet (141) provided on the top cover sheet (100), and a first pole hole (142) penetrating the top cover sheet (100); The first pole hole (142) is of a special-shaped structure, a lower pole (112) is provided on the bottom surface of the pole (11), the lower pole (112) is of a special-shaped structure corresponding to the first pole hole (142), and the lower pole (112) is at least partially assembled in the first pole hole (142) to limit the rotation of the pole (11); A sealing member (13) is provided between the pole (11) and the pole rivet member (14), and the rivet member (141) rivets the pole (11) to the top cover sheet (100); It also comprises a connecting piece (12), which is riveted to the pole rivet piece (14) on one hand and connected to the pole (11) on the other hand, so that the pole (11) is indirectly riveted to the top cover sheet (100) via the connecting piece (12).

2. The battery top cover according to claim 1, characterized in that: The pole (11) is provided with a concave or convex first positioning portion (114), and the connecting piece (12) is correspondingly provided with a second positioning portion, and the first positioning portion (114) and the second positioning portion are matched in a concave-convex manner; the connecting piece (12) is made of insulating material or conductive material.

3. The battery top cover according to claim 2, characterized in that: The first pole hole (142) is a regular polygonal hole, and the first pole hole (142) is a corresponding regular polygonal shape.

4. The battery top cover according to any one of claims 1 to 3, characterized in that: The rivet (141) is a rivet ring convexly arranged on the top cover sheet (100), which is arranged continuously or at intervals, and the rivet (141) is arranged inwardly or outwardly inclined; an injection molding recess (145) is concavely arranged on the top cover sheet (100) outside the rivet (141), and at least one rivet hole (146) is arranged in the injection molding recess (145); the connecting piece (12) is formed by injection molding.

5. A battery top cover, comprising a top cover sheet (100) and a pole (11), characterized in that: A pole rivet (14) is provided on the top cover sheet (100), and the pole rivet (14) comprises a rivet (141) provided on the top cover sheet (100), and a first pole hole (142) penetrating the top cover sheet (100); The first pole hole (142) is of a special-shaped structure, a lower pole (112) is provided on the bottom surface of the pole (11), the lower pole (112) is of a special-shaped structure corresponding to the first pole hole (142), and the lower pole (112) is at least partially assembled in the first pole hole (142) to limit the rotation of the pole (11); A sealing member (13) is provided between the pole (11) and the pole rivet member (14), and the rivet member (141) fixes the pole (11) to the top cover sheet (100).

6. The battery top cover according to claim 5, characterized in that: The rivet (141) is a rivet ring protruding from the top cover sheet (100), which is arranged continuously or at intervals. After the pole (11) is assembled, the rivet (141) is bent inwards so that it directly presses against the pole (11).

7. The battery top cover according to claim 5, characterized in that: It also includes a connecting piece (12), the connecting piece (12) being arranged between the pole (11) and the rivet piece (141); the rivet piece (141) is a rivet ring convexly arranged on the top cover sheet (100), which is arranged continuously or at intervals, and after the pole (11) is assembled, the rivet piece (141) is bent inwardly to be pressed against the connecting piece (12); The connecting piece (12) is made of insulating material or conductive material, and is formed by injection molding or is a prefabricated insert.

8. The battery top cover according to claim 7, characterized in that: The pole (11) is provided with a concave or convex first positioning portion (114), and the connecting member (12) is correspondingly provided with a second positioning portion, and the first positioning portion (114) and the second positioning portion are matched in a concave-convex manner; The connecting piece (12) is first formed into one piece with the pole (11) by injection molding, and then after assembly, the rivet piece (141) is bent inwards so as to press against the connecting piece (12).

9. The battery top cover according to any one of claims 5 to 8, characterized in that: The first pole hole (142) is a rectangular hole, a square hole, a triangular hole, a pentagonal hole, a hexagonal hole or an octagonal hole; or, The first pole hole (142) is a regular polygonal hole with rounded corners; or, The first pole hole (142) is a square hole with rounded corners.

10. The battery top cover according to claim 3 or 8, characterized in that: The pole (11) further comprises an upper pole (111) and a pole convex ring (113), wherein the pole convex ring (113) is convexly arranged in a lateral direction relative to the upper pole (111) and the lower pole (112), and the first positioning portion (114) is arranged on the upper pole (111) and / or the lower pole (112); The first pole hole (142) is arranged in the rivet (141) and has a step (144) formed therebetween. A first boss (143) is protruded around the edge of the step (144). The sealing member (13) comprises a first sealing portion (131) and a second sealing portion (132).

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