Large-capacity battery shell cover structure

Abstract

The utility model relates to the technical field of battery shell covers, in particular to a high-capacity battery shell cover structure, and aims to solve the problems that the shell cover structure of a high-capacity battery in the prior art is generally made of a large-area integral injection molding material, the shrinkage fluctuation of an insulating spacer is uncontrollable according to the material and size shrinkage of different batches, and the service life of the insulating spacer is influenced. The problem that the center distance dimensional tolerance of a positive pole and a negative pole is too large, hole position deviation of the positive pole and the negative pole is caused, and assembly deviation is caused is solved. The cover plate is sequentially provided with the glue nails, the sealing nails and the process nails, so that the problems that in the prior art, due to the fact that large-area overall injection molding glue is adopted, the shrinkage fluctuation of an insulating spacer is uncontrollable according to materials of different batches, the size shrinkage is uncontrollable, the center distance dimensional tolerance of the positive pole and the negative pole is too large, the hole positions of the positive pole and the negative pole are shifted, and assembly is shifted are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery shell covers, and more specifically, to a large-capacity battery shell cover structure. Background Art

[0002] The shell of the shell cover structure of large-capacity batteries is usually made of aluminum alloy or high-strength plastic, which has good corrosion resistance and strength. It is designed to be sealed to prevent liquid leakage and gas escape, and is equipped with a sealing ring to enhance the airtightness. In addition, the heat dissipation channel helps improve the heat dissipation performance, ensures the safe operation of the battery, and reduces the risk of overheating. However, the shell cover structure of large-capacity batteries in the existing technology is usually a large-area integral injection molded plastic, and the shrinkage fluctuation of the insulating gasket depends on the materials of different batches. The dimensional shrinkage is uncontrollable, and the dimensional tolerance of the center distance of the positive and negative poles will be too large, which will cause the positive and negative pole hole positions to shift, resulting in assembly offset problems. Utility Model Content

[0003] The purpose of the present utility model is to overcome the shortcomings of the existing technology, adapt to actual needs, and provide a large-capacity battery shell cover structure to solve the problem that the shell cover structure of large-capacity batteries in the existing technology is usually a large-area integral injection molded plastic, and the shrinkage fluctuation of the insulating gasket varies according to different batches of materials, the dimensional shrinkage is uncontrollable, and the dimensional tolerance of the center distance between the positive and negative poles is too large, which will cause the positive and negative pole hole positions to shift, resulting in assembly offset.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a large-capacity battery shell cover structure, comprising a cover plate and a reverse PP bracket, the top of the cover plate is respectively provided with a positive aluminum pole, the top of the cover plate is provided with a negative copper-aluminum composite pole symmetrically arranged with the positive aluminum pole, the top of the cover plate is provided with a rubber ding, the top of the cover plate is provided with a sealing nail, the top of the cover plate is provided with a process nail, the rubber ding, the sealing nail and the process nail are arranged in sequence.

[0005] Preferably, a fluororubber seal is provided between the positive aluminum pole and the negative copper-aluminum composite pole and the cover plate, and the fluororubber seal is used to seal the positive aluminum pole and the cover plate and the negative copper-aluminum composite pole and the cover plate respectively.

[0006] Preferably, a positive electrode black conductive PPS rubber coating is provided between the positive electrode aluminum pole and the cover plate, and a negative electrode insulating PPS rubber coating is provided between the negative electrode copper-aluminum composite pole and the cover plate.

[0007] Preferably, the top of the cover plate is provided with symmetrically arranged explosion-proof membranes, and the tops of the explosion-proof membranes are all provided with explosion-proof protective films.

[0008] Preferably, a negative electrode connecting piece is provided at the bottom of the reverse PP bracket, and a negative electrode protection pressing piece is provided at the bottom of the negative electrode connecting piece.

[0009] Preferably, a positive electrode connecting piece is provided at the bottom of the reverse PP bracket, and a positive electrode protection pressing piece is provided at the bottom of the positive electrode connecting piece.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The utility model sequentially arranges rubber dies, sealing nails and process nails on the cover plate to solve the problem in the prior art that due to the large-area integral injection of plastic glue, the shrinkage fluctuation of the insulating gasket varies according to the materials of different batches, the dimensional shrinkage is uncontrollable, and the dimensional tolerance of the center distance of the positive and negative poles is too large, which will cause the positive and negative pole holes to shift and lead to assembly offset.

[0012] 2. For safety reasons, the utility model adds an explosion-proof membrane, which provides double explosion protection and can reduce the risk of explosion due to insufficient exhaust.

[0013] 3. The utility model provides a positive electrode protection pressing sheet and a negative electrode protection pressing sheet, welds them with ultrasound, then punches and draws a step and a bulge on the other end surface of the positive electrode connecting sheet and the negative electrode connecting sheet, and then uses laser welding to weld them to the negative electrode copper-aluminum composite pole and the positive electrode aluminum pole surface, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the split structure of the utility model.

[0016] Description of the numbers in the figure:

[0017] 1. Positive electrode black conductive PPS rubber coating; 2. Positive aluminum electrode; 3. Cover plate; 4. Explosion-proof protective film; 5. Rubber tack; 6. Sealing nail; 7. Process nail; 8. Negative electrode copper-aluminum composite electrode; 9. Negative electrode insulating PPS rubber coating; 10. Rear PP bracket; 11. Fluororubber seal; 12. Negative electrode protection pressing piece; 13. Negative electrode connecting piece; 14. Explosion-proof membrane; 15. Positive electrode connecting piece; 16. Positive electrode protection pressing piece. DETAILED DESCRIPTION

[0018] like Figures 1 to 2As shown, the utility model relates to: a large-capacity battery shell cover structure, including a cover plate 3 and a reverse PP bracket 10, the top of the cover plate 3 is respectively provided with a positive aluminum pole 2, the top of the cover plate 3 is provided with a negative copper-aluminum composite pole 8 symmetrically arranged with the positive aluminum pole 2, the top of the cover plate 3 is provided with a rubber 5, the top of the cover plate 3 is provided with a sealing nail 6, the top of the cover plate 3 is provided with a process nail 7, the rubber 5 and the sealing nail 6 and the process nail 7 are arranged in sequence; by arranging the rubber 5, the sealing nail 6 and the process nail 7 on the cover plate 3 in sequence, the problem in the prior art that due to large-area integral injection of plastic glue, the shrinkage fluctuation of the insulating gasket according to different batches of materials, the dimensional shrinkage is uncontrollable, the dimensional tolerance of the center distance between the positive and negative poles is too large, which will cause the positive and negative pole hole positions to shift, resulting in assembly offset is solved.

[0019] Furthermore, a fluororubber seal 11 is provided between the positive aluminum pole 2 and the negative copper-aluminum composite pole 8 and the cover plate 3. The fluororubber seal 11 is used to seal the positive aluminum pole 2 and the cover plate 3 and the negative copper-aluminum composite pole 8 and the cover plate 3 respectively; the fluororubber seal 11 is used to increase the sealing effect between the positive aluminum pole 2 and the cover plate 3 and the negative copper-aluminum composite pole 8 and the cover plate 3.

[0020] Furthermore, a positive electrode black conductive PPS rubber coating 1 is provided between the positive electrode aluminum pole 2 and the cover plate 3, and a negative electrode insulating PPS rubber coating 9 is provided between the negative electrode copper-aluminum composite pole 8 and the cover plate 3; the negative electrode insulating PPS rubber coating 9 and the positive electrode black conductive PPS rubber coating 1 respectively increase the insulation effect between the negative electrode copper-aluminum composite pole 8 and the positive electrode aluminum pole 2 and the cover plate 3.

[0021] Furthermore, a symmetrically arranged explosion-proof membrane 14 is provided on the top of the cover plate 3, and an explosion-proof protective film 4 is provided on the top of each explosion-proof membrane 14; by adding the explosion-proof membrane 14, such double explosion protection can reduce the risk of explosion due to insufficient exhaust.

[0022] Furthermore, a negative electrode connecting piece 13 is provided at the bottom of the reverse PP bracket 10, and a negative electrode protection pressing piece 12 is provided at the bottom of the negative electrode connecting piece 13; by providing the negative electrode protection pressing piece 12, ultrasonic welding is used, and then a step and a convex hull are punched and drawn on the other end face of the negative electrode connecting piece 13, and then laser welding is used to weld it to the surface of the negative copper-aluminum composite pole 8, thereby reducing costs.

[0023] Furthermore, a positive electrode connecting piece 15 is provided at the bottom of the reverse PP bracket 10, and a positive electrode protection pressing piece 16 is provided at the bottom of the positive electrode connecting piece 15; by providing the positive electrode protection pressing piece 16, ultrasonic welding is used, and then a step and a convex bump are punched and drawn on the other end face of the positive electrode connecting piece 15, and then laser welding is used to weld it to the surface of the positive aluminum pole 2, thereby reducing costs.

[0024] Working principle: This embodiment provides a large-capacity battery shell cover structure. When in use, by sequentially arranging the rubber 5, the sealing nail 6 and the process nail 7 on the cover plate 3, the problem in the prior art that due to the large-area integral injection of plastic glue, the shrinkage fluctuation of the insulating gasket depends on the materials of different batches, the size shrinkage is uncontrollable, and the dimensional tolerance of the center distance of the positive and negative poles is too large, which will cause the positive and negative pole hole positions to shift, resulting in assembly offset.

[0025] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A large-capacity battery shell cover structure, characterized in that: The invention comprises a cover plate (3) and a rear PP bracket (10), wherein the top of the cover plate (3) is respectively provided with a positive aluminum pole (2), the top of the cover plate (3) is provided with a negative copper-aluminum composite pole (8) symmetrically arranged with the positive aluminum pole (2), the top of the cover plate (3) is provided with a rubber tack (5), the top of the cover plate (3) is provided with a sealing nail (6), the top of the cover plate (3) is provided with a process nail (7), and the rubber tack (5) is arranged in sequence with the sealing nail (6) and the process nail (7).

2. A large-capacity battery shell cover structure according to claim 1, characterized in that: A fluororubber seal (11) is provided between the positive aluminum pole (2) and the negative copper-aluminum composite pole (8) and the cover plate (3). The fluororubber seal (11) is used to respectively seal between the positive aluminum pole (2) and the cover plate (3) and between the negative copper-aluminum composite pole (8) and the cover plate (3).

3. A large-capacity battery shell cover structure according to claim 1, characterized in that: A positive electrode black conductive PPS rubber coating (1) is provided between the positive electrode aluminum pole (2) and the cover plate (3), and a negative electrode insulating PPS rubber coating (9) is provided between the negative electrode copper-aluminum composite pole (8) and the cover plate (3).

4. A large-capacity battery shell cover structure according to claim 1, characterized in that: The top of the cover plate (3) is provided with symmetrically arranged explosion-proof membranes (14), and the tops of the explosion-proof membranes (14) are all provided with explosion-proof protective films (4).

5. A large-capacity battery shell cover structure according to claim 1, characterized in that: A negative electrode connecting piece (13) is provided at the bottom of the reverse PP bracket (10), and a negative electrode protection pressing piece (12) is provided at the bottom of the negative electrode connecting piece (13).

6. A large-capacity battery shell cover structure according to claim 1, characterized in that: A positive electrode connecting piece (15) is provided at the bottom of the reverse PP bracket (10), and a positive electrode protection pressing piece (16) is provided at the bottom of the positive electrode connecting piece (15).

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