CN220420723U - Top cover structure of secondary battery - Google Patents
Top cover structure of secondary battery Download PDFInfo
- Publication number
- CN220420723U CN220420723U CN202321977744.XU CN202321977744U CN220420723U CN 220420723 U CN220420723 U CN 220420723U CN 202321977744 U CN202321977744 U CN 202321977744U CN 220420723 U CN220420723 U CN 220420723U
- Authority
- CN
- China
- Prior art keywords
- top cover
- secondary battery
- pole post
- negative pole
- positive pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 14
- 238000003466 welding Methods 0.000 abstract description 14
- 238000001746 injection moulding Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 4
- 238000013021 overheating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a top cover structure of a secondary battery, wherein two sides of the top cover are respectively provided with a positive pole post and a negative pole post, the outsides of the positive pole post and the negative pole post are respectively provided with plastic on the positive pole and plastic on the negative pole in a surrounding way, the positive pole post and the negative pole post are respectively provided with a sealing ring, the lower ends of the positive pole post and the negative pole post are sleeved with an insulating gasket, the insulating gasket is fixed on the top cover through riveting flanging, and the end face of one side of the insulating gasket, which is back to the top cover, is provided with a circulation groove; the riveting process is adopted, so that the injection molding cost is reduced compared with the traditional injection molding top cover; compared with the welding top cover, the welding process is reduced, the use of a welding ring is eliminated, the BOM cost is reduced, and the assembly is carried out through a flanging mechanical structure, so that the yield of the top cover is improved, and the reliability of the top cover is also improved; through the circulation groove on the insulating gasket, the circulation of the electrolyte is effectively increased, and the electrolyte is prevented from being detained to form crystals to cause short circuit.
Description
Technical Field
The utility model relates to the field of lithium ion batteries, in particular to a top cover structure of a secondary battery.
Background
With the increasing prominence of environmental problems, low carbon economy has become the mainstay of future economic development. The new energy source gradually replaces the traditional environmental pollution type energy source, and the power battery is gradually accepted by the vast manufacturers and consumers as the representative of the new energy source. The power battery is used as a main power source of the new energy automobile and becomes one of key components of the electric automobile.
As a key component of an electric automobile, a power battery has great influence on the overall automobile power performance, economy and safety.
In order to reduce cost advantage, the current power battery top cover develops a top cover which is composed of a top cover plate, a welding ring, a pole column, upper plastic, lower plastic, a sealing ring and the like, wherein the upper plastic is connected with the pole column and the welding ring, and the welding ring is connected with the top cover plate through welding.
For this reason, we propose a secondary battery top cap structure to solve the above-mentioned problems.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a top cover structure of a secondary battery.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a top cover structure of a secondary battery comprises a top cover, a sealing ring, an insulating gasket, a positive pole post, plastic on a positive pole, a negative pole post and plastic on a negative pole; the positive pole post and negative pole post are installed respectively to the top cap both sides, the outside of positive pole post and negative pole post is encircleed respectively and is provided with plastic on the positive pole and negative pole respectively, all install the sealing washer on positive pole post and the negative pole post, its characterized in that, after insulating gasket was equipped with to the lower pot head of positive pole post and negative pole post, fix on the top cap through the riveting turn-ups, the pole post is insulated through insulating gasket with the top cap, and is provided with the circulation groove on the one side terminal surface of insulating gasket dorsad top cap, through the circulation groove on the insulating gasket, effectively increase the connectivity of electrolyte, prevent that electrolyte from detaining and forming crystallization and leading to the short circuit.
Further preferably, the flow channel is any one of rectangular, arc-shaped, trapezoid and triangle.
Further preferably, the flow-through groove is one or more.
Further preferably, when the number of the flow grooves is plural, the plurality of flow grooves are uniformly provided on the end face of the insulating spacer.
Further preferably, the inner diameter of the insulating gasket is slightly larger than the outer diameter of the pole at the matching position; when the electrolyte in the battery flows to the pole, the electrolyte can flow back into the battery through the circulation groove on the insulating gasket and the gap between the inner hole of the insulating gasket and the pole.
Further preferably, the lower end of the top cover is fixedly provided with lower plastic.
Further preferably, an explosion-proof valve is arranged on the liquid injection hole of the top cover, and a protection sheet is arranged at the top end of the explosion-proof valve; when the secondary battery generates gas due to overcharge, overdischarge, or overheating of the battery to excessively increase the internal pressure of the secondary battery, the explosion-proof valve and the protective sheet are broken at this time so that the gas formed inside the secondary battery may be discharged to the outside through the through-hole of the explosion-proof valve.
Compared with the prior art, the utility model has the beneficial effects that:
the riveting process is adopted, so that the injection molding cost is reduced compared with the traditional injection molding top cover; compared with the welding top cover, the welding process is reduced, the use of a welding ring is eliminated, the BOM cost is reduced, and the assembly is carried out through a flanging mechanical structure, so that the yield of the top cover is improved, and the reliability of the top cover is also improved; through the circulation groove on the insulating gasket, the circulation of the electrolyte is effectively increased, and the electrolyte is prevented from being detained to form crystals to cause short circuit.
Drawings
FIG. 1 is an exploded view of the present utility model;
FIG. 2 is a cross-sectional view of the assembled device provided by the present utility model;
FIG. 3 is an enlarged schematic view of a portion of FIG. 2A;
fig. 4 is a schematic structural view of an insulating spacer according to the present utility model.
In the figure: top cap 1, sealing washer 2, insulating gasket 3, positive pole post 4, plastic on the positive pole 5, negative pole post 6, plastic on the negative pole 7, lower plastic 8, explosion-proof valve 9, protection piece 10, circulation groove 31.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1 to 4, a top cover structure of a secondary battery comprises a top cover 1, a sealing ring 2, an insulating gasket 3, a positive pole 4, a plastic 5 on a positive pole, a negative pole 6 and a plastic 7 on a negative pole; the positive pole post 4 and negative pole post 6 are installed respectively to top cap 1 both sides, the outside of positive pole post 4 and negative pole post 6 is encircleed respectively and is provided with plastic 5 on the positive pole and plastic 7 on the negative pole, all install sealing washer 2 on positive pole post 4 and the negative pole post 6, after insulating gasket 3 is equipped with to the lower extreme cover of positive pole post 4 and negative pole post 6, fix on top cap 1 through the riveting turn-ups, and insulating gasket 3 is provided with circulation groove 31 on the one side terminal surface that is dorsad to top cap 1.
In the examples: the post is injection molded firstly, the injection molded post and the sealing ring 2 are arranged on the top cover 1, and after the insulating gasket 3 is sleeved on the post, the post and the top cover 1 are insulated through the insulating gasket 3, and the cylinder at the lower part of the post is riveted and turned to the insulating gasket 3 to finish the manufacturing of the integral top cover.
Further, the flow channel 31 is any one of rectangle, arc, trapezoid and triangle; one or more flow channels 31; when the number of the flow grooves 31 is plural, the plurality of flow grooves 31 are uniformly provided on the end face of the insulating spacer 3.
In the examples: as shown in fig. 3, the shape of the circulation groove 31 is triangular, and the number of the circulation grooves 31 is 4, when the electrolyte in the battery flows to the pole, the electrolyte can flow back into the battery through the circulation groove 31 on the insulating gasket 3 and the gap between the inner hole of the insulating gasket 3 and the pole, and the circulation of the electrolyte is effectively increased through the circulation groove 31, so that the short circuit of the pole caused by the formation of crystals due to the retention of the electrolyte is prevented.
Further, the inner diameter of the insulating gasket 3 is slightly larger than the outer diameter of the pole at the matching position; the lower end of the top cover 1 is provided with a lower plastic 8 through ultrasonic welding.
Further, an explosion-proof valve 9 is arranged on the liquid injection hole of the top cover 1, and a protection sheet 10 is arranged at the top end of the explosion-proof valve 9; when the secondary battery generates gas due to overcharge, overdischarge, or overheating of the battery to excessively increase the internal pressure of the secondary battery, the explosion-proof valve 9 and the protective sheet 10 are broken at this time so that the gas formed inside the secondary battery may be discharged to the outside through the through-hole of the explosion-proof valve 9.
The riveting process is adopted, so that the injection molding cost is reduced compared with the traditional injection molding top cover; compared with the welding top cover, the welding process is reduced, the use of a welding ring is eliminated, the BOM cost is reduced, and the assembly is carried out through a flanging mechanical structure, so that the yield of the top cover is improved, and the reliability of the top cover is also improved; through the circulation groove on the insulating gasket, the circulation of the electrolyte is effectively increased, and the electrolyte is prevented from being detained to form crystals to cause short circuit.
Claims (7)
1. A top cover structure of a secondary battery comprises a top cover, a sealing ring, an insulating gasket, a positive pole post, plastic on a positive pole, a negative pole post and plastic on a negative pole; the plastic sealing device is characterized in that after the insulating gaskets are sleeved at the lower ends of the positive pole post and the negative pole post, the insulating gaskets are fixed on the top cover through riveting flanging, and a circulation groove is formed in one side end face of the insulating gaskets, which faces away from the top cover.
2. The secondary battery top cover structure according to claim 1, wherein the flow-through groove is any one of rectangular, arc-shaped, trapezoidal and triangular.
3. The secondary battery top cover structure according to claim 1, wherein the flow-through grooves are one or more.
4. The secondary battery top cover structure according to claim 3, wherein when the number of the flow grooves is plural, the plurality of flow grooves are uniformly provided on the end face of the insulating spacer.
5. The secondary battery top cover structure according to claim 1, wherein the inner diameter of the insulating spacer is slightly larger than the outer diameter of the pole at the mating site.
6. The secondary battery top cover structure according to claim 1, wherein a lower plastic is fixedly installed at a lower end of the top cover.
7. The secondary battery top cover structure according to claim 1, wherein the explosion-proof valve is arranged on the liquid injection hole of the top cover, and a protection sheet is arranged at the top end of the explosion-proof valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321977744.XU CN220420723U (en) | 2023-07-26 | 2023-07-26 | Top cover structure of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321977744.XU CN220420723U (en) | 2023-07-26 | 2023-07-26 | Top cover structure of secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220420723U true CN220420723U (en) | 2024-01-30 |
Family
ID=89650484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321977744.XU Active CN220420723U (en) | 2023-07-26 | 2023-07-26 | Top cover structure of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220420723U (en) |
-
2023
- 2023-07-26 CN CN202321977744.XU patent/CN220420723U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |