Top cover connecting structure

Abstract

The utility model discloses a top cover connecting structure, and aims to overcome the defects of high difficulty and high cost of the conventional production process. The top cover comprises a light plate, a top cover support, a pole and a connecting piece, the light plate is fixedly connected with the top cover support, the pole is located on the side, away from the top cover support, of the light plate, the connecting piece is located on the side, away from the light plate, of the top cover support, the pole and the light plate are arranged in an insulated mode, and the pole and the connecting piece are connected through rivets. The rivets sequentially penetrate through the connecting piece, the top cover support, the light plate and the pole, the rivets and the light plate are arranged in an insulated mode, the number of the rivets is at least two, the pole and the top cover are connected in a riveting mode, reliability is high, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and more specifically, to a top cover connection structure. Background Art

[0002] The energy storage battery includes a top cover and a battery cell. The poles on the top cover are connected to the battery cell through connecting plates and tabs to lead the electric energy of the battery cell to the outside of the battery. At least one of the poles on the top cover needs to avoid being connected to the top cover to cause a short circuit. Therefore, in the existing top cover process, the two poles are slightly different. The first pole is stamped and formed as a whole with the top cover, and the second pole is formed by the copper-aluminum thermal composite or friction welding process.

[0003] Both forms have certain difficulties. The first pole has high requirements for stamping during the forming process, and cracks are prone to appear on the edges, resulting in air leakage or even liquid leakage. The cost of the second pole is relatively high.

[0004] In view of the shortcomings of the existing production process, which is difficult and costly, the present application proposes a top cover connection structure, which connects the pole and the top cover by riveting, has high reliability and low cost. Summary of the invention

[0005] The utility model overcomes the shortcomings of the existing top cover process being difficult and costly, and provides a top cover connection structure, which connects the pole and the top cover in a riveting manner, has high reliability and low cost.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A top cover connection structure comprises a light board, a top cover bracket, a pole and a connecting piece, wherein the light board and the top cover bracket are fixedly connected, the pole is located on a side of the light board away from the top cover bracket, the connecting piece is located on a side of the top cover bracket away from the light board, the pole is insulated from the light board, the pole and the connecting piece are connected by rivets, the rivets pass through the connecting piece, the top cover bracket, the light board and the pole in sequence, the rivets are insulated from the light board, and the number of the rivets is at least two.

[0008] The top cover bracket is made of plastic, and the bare board is made of metal. The two are heated and bonded together. Pole posts and connecting plates are placed on both sides of the composite body of the top cover bracket and the bare board, and the pole posts and connecting plates are connected together by rivets. On this basis, the pole posts and connecting plates are electrically connected by rivets so that the two are conductive. Since there are two poles on the bare board, which are connected to the positive and negative poles respectively, if the poles or rivets are electrically connected to the bare board, a closed loop will be formed, thereby causing a short circuit. Therefore, an insulating structure is set to insulate the poles and the bare board, and the rivets and the bare board, so that the surface of the bare board is not charged. Multiple rivets are set to avoid the situation where there is only one rivet, in which the external force causes the pole to rotate around the rivet, thereby destroying the airtightness between the bare board and the pole. Compared with stamping, the connection method using rivets has higher reliability and lower process requirements, and has lower process costs than copper-aluminum thermal composite or friction welding.

[0009] Preferably, the pole is provided with a first positioning hole, the first positioning hole includes a coaxially arranged step hole, the rivet is provided with a first end at one end close to the pole, the first end is provided with a step, the step is adapted to the step hole so that the first end is not higher than the pole surface. The above structure makes the pole surface flush, maintains the same specifications as the existing battery, and maintains compatibility.

[0010] Preferably, the rivet is provided with a second end at one end close to the connecting piece, the second end is provided with a limiting cap, the connecting piece is provided with a second positioning hole for passing the rivet, the diameter of the limiting cap is larger than the second positioning hole, and the limiting cap provides axial limitation to the connecting piece.

[0011] Preferably, the pole is rectangular, and the number of rivets is two, and the rivets are located at non-adjacent corners of the pole. The above rivet positions can fully position the pole mechanically, and can play a shunting role in electrical performance to avoid excessive local current flow.

[0012] Preferably, the rivet is a good conductor of electricity.

[0013] Preferably, a first insulating plastic shell is sleeved on the middle part of the rivet, and the first insulating plastic shell separates the rivet from the light board.

[0014] Preferably, the first insulating plastic shell is made of polyvinyl fluoride.

[0015] Preferably, a second insulating plastic shell is provided between the pole and the light board, and the second insulating plastic shell separates the pole from the light board.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The rivet connection method has low process requirements and high reliability;

[0018] (2) The rivet connection method has lower process costs than copper-aluminum thermal composite or friction welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of the utility model;

[0020] Figure 2 It is a schematic diagram of the utility model;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] In the figure:

[0023] Light board 1, top cover bracket 2, pole 3, connecting piece 4, first positioning hole 5, step hole 6, first end 7, step 8, second end 9, limiting cap 10, second insulating rubber shell 11, first insulating rubber shell 12, rivet 13. DETAILED DESCRIPTION

[0024] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0026] Example:

[0027] A top cover connection structure comprises a light panel 1, a top cover bracket 2, a pole 3 and a connection piece 4.

[0028] The light board 1 and the top cover bracket 2 are fixedly connected. The top cover bracket 2 is made of plastic material, and the light board 1 is made of metal material. The two are bonded together after heating.

[0029] The poles 3 and the connecting pieces 4 are placed on both sides of the composite body of the top cover bracket 2 and the light panel 1 . The poles 3 are located on the side of the light panel 1 away from the top cover bracket 2 , and the connecting pieces 4 are located on the side of the top cover bracket 2 away from the light panel 1 .

[0030] The pole 3 and the connecting piece 4 are connected by a rivet 13, and the rivet 13 passes through the connecting piece 4, the top cover bracket 2, the light plate 1 and the pole 3 in sequence, and fixes the above structure together. The pole 3 is provided with a first positioning hole 5, and the first positioning hole 5 includes a coaxially arranged step hole 6. The rivet 13 is provided with a first end 7 at one end close to the pole 3, and the first end 7 is provided with a step 8. The step 8 is adapted to the step hole 6 so that the first end 7 is not higher than the surface of the pole 3. Through the above structure, the surface of the pole 3 is flush, maintaining the same specifications as the existing battery, and maintaining compatibility. The rivet 13 is provided with a second end 9 at one end close to the connecting piece 4, and the second end 9 is provided with a limiting cap 10. The connecting piece 4 is provided with a second positioning hole for passing the rivet 13, and the diameter of the limiting cap 10 is larger than the second positioning hole. The limiting cap 10 provides axial restriction to the connecting piece 4.

[0031] The rivet 13 is a good conductor of electricity. The pole 3 and the connecting plate 4 are electrically connected by the rivet 13 so that the two are conductive. It is worth noting that the rivet 13 described in the present application itself has a corresponding level of airtightness. The technicians in this field should be able to select the corresponding rivet 13, and the present application will not go into details here. The pole 3 is rectangular, and the number of rivets 13 is two, and the rivets 13 are located at non-adjacent corners of the pole 3. The above-mentioned position of the rivet 13 can fully position the pole 3 mechanically, and can play a shunting role in electrical performance to avoid excessive local current passing through. Multiple rivets 13 are set to avoid the situation where there is only one rivet 13, in which the external force causes the pole 3 to rotate around the rivet 13, thereby destroying the airtightness between the light plate 1 and the pole 3.

[0032] The pole 3 is insulated from the light board 1, and a second insulating plastic shell 11 is provided between the pole 3 and the light board 1, and the second insulating plastic shell 11 separates the pole 3 from the light board 1. The rivet 13 is insulated from the light board 1, and a first insulating plastic shell 12 is provided in the middle of the rivet 13, and the first insulating plastic shell 12 separates the rivet 13 from the light board 1. The material of the first insulating plastic shell 12 is polyvinyl fluoride. The light board 1 has an opening through which the rivet 13 passes, and steps are provided at both ends of the first insulating plastic shell 12. The opening is clamped by the steps to prevent the first insulating plastic shell 12 from falling off or separating from the top cover. Since there are two poles 3 on the light board 1, which are connected to the positive pole and the negative pole respectively, if the pole 3 or the rivet 13 is electrically connected to the light board 1, a closed loop will be formed, thereby causing a short circuit. Therefore, an insulating structure is provided to insulate the pole 3 from the light board 1, and the rivet 13 from the light board 1, so that the surface of the light board 1 is not charged.

[0033] The connection method using rivets 13 has higher reliability and lower process requirements than stamping, and has lower process costs than copper-aluminum thermal composite or friction welding.

[0034] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A top cover connection structure, characterized in that: It includes a light board, a top cover bracket, a pole and a connecting piece. The light board and the top cover bracket are fixedly connected. The pole is located on the side of the light board away from the top cover bracket. The connecting piece is located on the side of the top cover bracket away from the light board. The pole is insulated from the light board. The pole and the connecting piece are connected by rivets. The rivets pass through the connecting piece, the top cover bracket, the light board and the pole in sequence. The rivets are insulated from the light board. The number of rivets is at least two.

2. A top cover connection structure according to claim 1, characterized in that: The pole is provided with a first positioning hole, which includes a coaxially arranged step hole. The rivet is provided with a first end at one end close to the pole, and the first end is provided with a step. The step is adapted to the step hole so that the first end is not higher than the pole surface.

3. A top cover connection structure according to claim 1 or 2, characterized in that: The rivet is provided with a second end at one end close to the connecting piece, and a limiting cap is provided at the second end. A second positioning hole for passing the rivet is provided on the connecting piece, and the diameter of the limiting cap is larger than that of the second positioning hole.

4. A top cover connection structure according to claim 1, characterized in that: The pole is rectangular, and the number of rivets is two, and the rivets are located at non-adjacent corner points of the pole.

5. A top cover connection structure according to claim 1 or 4, characterized in that: Rivets are good conductors of electricity.

6. A top cover connection structure according to claim 1, characterized in that: A first insulating plastic shell is sleeved on the middle part of the rivet, and the first insulating plastic shell separates the rivet from the bare board.

7. A top cover connection structure according to claim 6, characterized in that: The first insulating plastic shell is made of polyvinyl fluoride.

8. A top cover connection structure according to claim 1, characterized in that: A second insulating plastic shell is provided between the pole and the light board, and the second insulating plastic shell separates the pole from the light board.

Images