CN220934237U - Top cover for secondary battery - Google Patents
Top cover for secondary battery Download PDFInfo
- Publication number
- CN220934237U CN220934237U CN202322363282.9U CN202322363282U CN220934237U CN 220934237 U CN220934237 U CN 220934237U CN 202322363282 U CN202322363282 U CN 202322363282U CN 220934237 U CN220934237 U CN 220934237U
- Authority
- CN
- China
- Prior art keywords
- top cover
- pole
- aluminum ring
- cover plate
- welding
- 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
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 26
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 14
- 238000001746 injection moulding Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a top cover for a secondary battery, which comprises a top cover plate, a sealing ring, a pole, a welded aluminum ring and upper plastic; the top cover plate is provided with a pole hole, the pole is provided with a step surface, the pole penetrates through the pole hole of the top cover plate, the sealing ring is arranged between the pole and the top cover plate, the welding aluminum ring is of an annular structure with a non-porous side wall, the bottom of the welding aluminum ring is assembled with the step of the pole hole of the top cover plate in a matched mode, the top cover plate is fixed with the welding aluminum ring in a welding mode, and upper plastic is formed by surrounding injection molding on the pole and the welding aluminum ring; according to the utility model, by eliminating the design of the holes on the side edges of the welded aluminum ring, the generation of metal scraps and metal wires during the molding of the aluminum ring is obviously reduced, the metal scraps caused by the holes can be eliminated in the process of gumming in injection molding, the insulation property of the negative electrode terminal is favorably increased, the design of the holes is eliminated for the molding of the aluminum ring, and the stamping process of the aluminum ring can be simplified, so that the production cost of the top cover is reduced.
Description
Technical Field
The utility model relates to the field of lithium ion batteries, in particular to a top cover for a secondary battery.
Background
With the development of new energy, the requirement of the existing battery on energy density is further increased, and the new energy power battery is usually a secondary battery, namely a battery which can activate active substances in a charging mode to continue to be used after the battery is discharged.
The power battery is used as a main power source of a new energy automobile, and becomes one of key components of the electric automobile, in the prior art of the top cover of the square battery, an aluminum ring is welded on the top cover, and as a plurality of holes are formed in the side face of the aluminum ring, the aluminum ring with the structure belongs to special-shaped belt hole punching, more metal scraps and metal wires can be generated, the existing cleaning technology cannot be thoroughly removed, and in the plastic injection molding and gumming process, the metal scraps can be wrapped and converged to the joint of a sealing ring and an upper plastic, so that poor insulation is generated between a pole and a top cover plate, and the risk of battery failure exists.
For this reason, we propose a top cover for a secondary battery to solve the above-mentioned problems.
Disclosure of utility model
The utility model aims to solve the defects in the prior art, and adopts the following technical scheme:
A top cover for a secondary battery comprises a top cover plate, a sealing ring, a polar post, a welded aluminum ring and upper plastic; the top cover plate is provided with a pole hole, the pole is provided with a step surface, the pole penetrates through the pole hole of the top cover plate, the sealing ring is arranged between the pole and the top cover plate, the welding aluminum ring is of an annular structure with a non-porous side wall, the bottom of the welding aluminum ring is assembled with the step of the pole hole of the top cover plate in a matched mode, the top cover plate is fixed with the welding aluminum ring in a welding mode, and upper plastic is formed by surrounding injection molding on the pole and the welding aluminum ring; in the injection molding process after the holes are canceled in the side wall of the welded aluminum ring, metal scraps wrapped and clamped when the colloid passes through the holes can be prevented from being collected at the joint of the sealing ring and the upper plastic, poor insulation between the top cover plate and the pole is caused, battery short circuit is caused, and the effect of integral sealing is achieved after the sealing ring is extruded to a certain compression amount between the pole and the top cover plate.
Further preferably, the bottom end of the top cover sheet is provided with a lower plastic, and two sides of the top end of the lower plastic are provided with a plurality of fixing buckles.
Further preferably, the bottom end of the top cover sheet is provided with a fixing hole matched with the fixing buckle on the lower plastic.
Further preferably, penetration welding is arranged between the top cover sheet and the welded aluminum ring, and the welding point is positioned on the bottom surface of the top cover sheet.
Further preferably, the top of the lower plastic is provided with a groove, and the groove can prevent the lower plastic from being jacked and deformed due to the protrusion at the penetration welding position.
Further preferably, the top cover sheet is detachably assembled with the lower plastic.
Further preferably, the through hole of the top cover plate is provided with an explosion-proof valve, the top end of the explosion-proof valve is provided with a protection sheet, and the protection of the secondary battery is achieved through the explosion-proof valve and the protection sheet.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, by eliminating the design of the holes on the side edges of the welded aluminum ring, the generation of metal scraps and metal wires during the molding of the aluminum ring is obviously reduced, the metal scraps caused by the holes can be eliminated in the process of gumming in injection molding, the insulation property of the negative electrode terminal is favorably increased, the design of the holes is eliminated for the molding of the aluminum ring, and the stamping process of the aluminum ring can be simplified, so that the production cost of the top cover is reduced.
Drawings
FIG. 1 is an exploded view of the present utility model;
FIG. 2 is an assembled schematic view of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model;
fig. 4 is an enlarged partial schematic view of fig. 3A.
In the figure: the anti-explosion device comprises a top cover plate 1, a sealing ring 2, a pole 3, a welded aluminum ring 4, an upper plastic 5, an anti-explosion valve 6, a protection sheet 7 and a lower plastic 8.
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 for a secondary battery includes a top cover sheet 1, a sealing ring 2, a post 3, a welded aluminum ring 4, and an upper plastic 5; the top cover sheet 1 is provided with a pole hole, the pole 3 is provided with a step surface, the pole 3 is penetrated in the pole hole of the top cover sheet 1, the sealing ring 2 is arranged between the pole 3 and the top cover sheet 1, the welding aluminum ring 4 is of an annular structure with a non-porous side wall, the bottom of the welding aluminum ring 4 is assembled with the pole hole step of the top cover sheet 1 in a matched manner, the top cover sheet 1 is welded and fixed with the welding aluminum ring 4, and the pole 3 and the welding aluminum ring 4 are annularly injection-molded with upper plastic 5; penetration welding is arranged between the top cover sheet 1 and the welding aluminum ring 4, and the welding point is positioned on the bottom surface of the top cover sheet 1.
In the examples: after the bottom of the welded aluminum ring 4 is matched and assembled with the pole hole step of the top cover plate 1, laser penetrates through the bottom of the top cover plate 1 and is welded and fixed with the aluminum ring, and before welding, the sealing ring 2 and the pole 3 are required to be put into the pole hole of the top cover plate 1. After the welding is finished, the sealing ring 2 is compressed to a design position, the whole body is integrally injection-molded to form an upper plastic 5 for fixing the whole structure and sealing, and after the side wall of the welded aluminum ring 4 is provided with a hole, metal scraps wrapped and clamped out when colloid passes through the hole can be prevented from being collected to the joint of the sealing ring 2 and the upper plastic 5 in the injection molding process, so that poor insulation between the top cover plate 1 and the pole column 3 is caused, and a battery short circuit is caused.
The bottom end of the top cover sheet 1 is provided with a lower plastic 8, two sides of the top end of the lower plastic 8 are provided with a plurality of fixing buckles, and the bottom end of the top cover sheet 1 is provided with fixing holes matched with the fixing buckles on the lower plastic 8; the top cover sheet and the lower plastic are detachably assembled.
In the examples: the top cover sheet 1 and the lower plastic 8 are assembled in place through the fixing buckles and the fixing holes, and then the top cover sheet 1 and the lower plastic 8 are assembled in a buckle or ultrasonic hot melting mode (shown in figure 1), and the top cover sheet 1 and the lower plastic 8 are assembled in an ultrasonic hot melting mode preferably.
The top of the lower plastic 8 is provided with a groove which can prevent the lower plastic 8 from being jacked up and deformed due to the protrusion at the penetration welding position.
The through hole of the top cover plate 1 is provided with an explosion-proof valve 6, and the top end of the explosion-proof valve 6 is provided with a protection sheet 7.
In the examples: the top cover 1 intermediate position is equipped with the through-hole for explosion-proof valve 6 assembly welding is equipped with protection piece 7 on the explosion-proof valve 6, and protection piece 7 pastes in the top of explosion-proof valve 6, and explosion-proof valve 6 can break when the inside pressure of electricity core reaches the critical point, can effectually prevent that the electricity core is inside to produce the explosion because of the pressure is too big, and protection piece 7 can protect explosion-proof valve 6 in the outside simultaneously, can effectually prevent explosion-proof valve 6 from receiving the external influence.
In addition, the pole hole of the top cover plate 1, the sealing ring 2, the pole 3, the welding aluminum ring 4 and the upper plastic 5 are of a directional structure, so that the torsion resistance of the whole structure can be favorably provided, and certain interference exists between the welding aluminum ring 4 and the pole 3 in the direction perpendicular to the top cover plate 1, so that the strength in the vertical direction is effectively increased, and the sealing failure caused by the long-term resilience force of the sealing ring 2 is avoided.
According to the utility model, by eliminating the design of the holes on the side edges of the welded aluminum ring, the generation of metal scraps and metal wires during the molding of the aluminum ring is obviously reduced, the metal scraps caused by the holes can be eliminated in the process of gumming in injection molding, the insulation property of the negative electrode terminal is favorably increased, the design of the holes is eliminated for the molding of the aluminum ring, and the stamping process of the aluminum ring can be simplified, so that the production cost of the top cover is reduced.
Claims (6)
1. A top cover for a secondary battery comprises a top cover plate, a sealing ring, a polar post, a welded aluminum ring and upper plastic; the pole is provided with a pole hole on the top cover plate, the pole is provided with a step surface, the pole is arranged in the pole hole of the top cover plate in a penetrating way, and the sealing ring is arranged between the pole and the top cover plate.
2. The top cover for a secondary battery according to claim 1, wherein the bottom end of the top cover sheet is equipped with a lower plastic, and a plurality of fixing buttons are provided at both sides of the top end of the lower plastic.
3. The top cover for a secondary battery according to claim 2, wherein the bottom end of the top cover sheet is provided with a fixing hole which is matched with the fixing button on the lower plastic.
4. The top cover for a secondary battery according to claim 2, wherein the lower plastic top portion is provided with a groove.
5. The top cover for a secondary battery according to claim 2, wherein the top cover sheet is detachably assembled with the lower plastic.
6. The top cover for a secondary battery according to claim 1, wherein the through-hole of the top cover sheet is provided with an explosion-proof valve, and the top end of the explosion-proof valve is provided with a protective sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322363282.9U CN220934237U (en) | 2023-09-01 | 2023-09-01 | Top cover for secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322363282.9U CN220934237U (en) | 2023-09-01 | 2023-09-01 | Top cover for secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220934237U true CN220934237U (en) | 2024-05-10 |
Family
ID=90934276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322363282.9U Active CN220934237U (en) | 2023-09-01 | 2023-09-01 | Top cover for secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220934237U (en) |
-
2023
- 2023-09-01 CN CN202322363282.9U patent/CN220934237U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106207075B (en) | A kind of battery with overcurrent protection function | |
| CN216389535U (en) | Cylindrical lithium ion battery and battery module thereof | |
| US20080213657A1 (en) | High Capacity Lithium Ion Secondary Battery with Metal Case | |
| CN112531295A (en) | Lithium ion battery structure and tab electric connection method | |
| CN109713353B (en) | Secondary battery, secondary battery assembling method, and battery module | |
| CN207753113U (en) | A kind of high usage electrochemical device | |
| CN113555602A (en) | Novel cylindrical lithium ion battery and manufacturing method thereof | |
| CN209880666U (en) | Improved automobile battery cover plate | |
| CN214378547U (en) | Button type lithium ion battery | |
| CN112290133A (en) | Secondary battery top cover and assembling method thereof, and secondary battery | |
| CN211629141U (en) | Battery cover plate structure | |
| CN215834573U (en) | Novel cylindrical lithium ion battery and battery module thereof | |
| CN111370605A (en) | Electrochemical device and preparation method thereof | |
| CN220934237U (en) | Top cover for secondary battery | |
| CN219203322U (en) | Cylindrical battery and electronic equipment | |
| CN217485674U (en) | Cylindrical battery | |
| CN214043796U (en) | Power battery device | |
| CN214123986U (en) | Secondary battery top cap and secondary battery thereof | |
| CN115347290A (en) | Battery top cover and manufacturing method thereof | |
| CN213340545U (en) | Battery cover plate and battery | |
| CN211088326U (en) | Sealing element for top cover of lithium ion battery | |
| CN213071223U (en) | Button cell | |
| CN220189783U (en) | Battery cover plate with external riveting structure | |
| CN217691381U (en) | Riveting assembly structure of battery top cover and integrated battery top cover assembly | |
| CN219642967U (en) | Top cap subassembly and battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |