CN203910875U - Overcurrent protection combined cap for cylindrical lithium battery - Google Patents
Overcurrent protection combined cap for cylindrical lithium battery Download PDFInfo
- Publication number
- CN203910875U CN203910875U CN201420118176.2U CN201420118176U CN203910875U CN 203910875 U CN203910875 U CN 203910875U CN 201420118176 U CN201420118176 U CN 201420118176U CN 203910875 U CN203910875 U CN 203910875U
- Authority
- CN
- China
- Prior art keywords
- thermistor
- explosion
- burst disk
- overcurrent protection
- lithium battery
- 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.)
- Expired - Fee Related
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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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
An overcurrent protection combined cap for a cylindrical lithium battery comprises a steel cap, a supporting plate, isolating rings, an explosion-proof piece, a sealing ring and a thermistor, wherein the thermistor is a thermistor with the nickel-plated brass surface and located between the steel cap and the explosion-proof piece; the explosion-proof piece is a concave explosion-proof piece, and the bottom end of the explosion-proof piece is connected with a connecting piece; an isolating ring II is arranged on the outer side of a point where the connecting piece is connected with the explosion-proof piece; the supporting plate is arranged between the connecting piece and the explosion-proof piece; an isolating ring I is arranged at ends of the supporting plate and the connecting piece; a through hole is formed in the outer side of one end, which is contacted with the connecting piece, of the supporting plate; outer sides of the steel cap, the explosion-proof piece, the thermistor and the isolating ring II are sealed through the sealing ring. The combined cap has the benefits as follows: 1, the percent of pass of primary welding is increased; 2, the flow capacity capable of guaranteeing the low resistance consumption and the high power is increased during normal work of the battery; 3, the battery is short-circuited through the thermistor when the outside of the battery is short-circuited, so that a safety protection function is added.
Description
Technical field
The utility model relates to a kind of overcurrent protection combination cover cap, especially relates to a kind of cylindrical lithium battery overcurrent protection combination cover cap.
Background technology
Now unreasonable due to syndeton between domestic cylindrical lithium battery volume core and block, cause large electric current by time generate heat and more seriously have a strong impact on the performance of battery, and the life-span significantly reduce, making difficulty of processing is larger.
Summary of the invention
The purpose of this utility model is to provide a kind of combination cover cap; by optimizing its syndeton; and by installing thermistor additional; the safety protection function of overcurrent protection combination cover cap while being increased in external short circuit, in the time that battery is normally worked, can ensure low resistance consumption; powerful through-current capability; and employing the present invention, lug can be by ultrasonic bonding with block, has greatly increased stability test and through-current capability and has improved the first-time qualification rate of welding.
For achieving the above object, the utility model is by the following technical solutions: a kind of cylindrical lithium battery overcurrent protection combination cover cap comprises steel cap, supporting bracket, cage ring, burst disk, sealing ring and thermistor, described thermistor is the thermistor of surface copper nickel plating, and thermistor is between steel cap and burst disk; Described burst disk is spill burst disk, the bottom of burst disk is connected with brace, the tie point arranged outside of brace and burst disk has cage ring II, between brace and burst disk, be provided with supporting bracket, the end of supporting bracket and brace is provided with cage ring I, the end arranged outside that described supporting bracket contacts with brace has through hole, and the outside of described steel cap, burst disk, thermistor and cage ring II is sealed by sealing ring.
Further, the carbon steel that described its material of steel cap is plating nickel on surface.
Further, described burst disk, brace, its material of supporting bracket are fine aluminium.
Further, its material of described sealing ring is polypropylene.
Further, its material of described cage ring I, cage ring II is macromolecular material.
Compared with prior art, the utlity model has following beneficial effect: 1, increased the once qualification rate of welding; 2 increase guarantee low resistance consumption, powerful through-current capability in the time that battery is normally worked; 3 make battery short circuit by thermistor in the time of external short-circuit of battery, increase safety protection function.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of cylindrical lithium battery overcurrent protection of Fig. 1 combination cover cap structural representation.
In figure, 1 steel cap, 2 sealing rings, 3 thermistors, 4 burst disk, 5 cage ring II, 6 supporting brackets, 7 braces, 8 cage ring I, 9 through holes.
Embodiment
A kind of cylindrical lithium battery overcurrent protection combination cover cap comprises 1 steel cap, 6 supporting brackets, 5 cage ring II, 8 cage ring I, 4 burst disk, 2 sealing rings and 3 thermistors, 3 described thermistors are the thermistor of surface copper nickel plating, and 3 thermistors are between 1 steel cap and 4 burst disk, 4 described burst disk are spill burst disk, the bottom of 4 burst disk is connected with 7 braces, the tie point arranged outside of 7 braces and 4 burst disk has 5 cage ring II, between 7 braces and 4 burst disk, be provided with 6 supporting brackets, the end of 6 supporting brackets and 7 braces is provided with 8 cage ring I, the end arranged outside that 6 described supporting brackets contact with 7 braces has 9 through holes, 1 described steel cap, 4 burst disk, the outside of 3 thermistors and 5 cage ring II is sealed by 2 sealing rings, the carbon steel that 1 described its material of steel cap is plating nickel on surface, 4 described burst disk, 7 braces, its material of 6 supporting brackets is fine aluminium, described its material of 2 sealing rings is polypropylene, 8 described cage ring I, 5 its materials of cage ring II are macromolecular material.
Obviously, above-mentioned execution mode is only preferred embodiments of the present utility model, and any simple modifications on this basis all belongs to protection range of the present utility model.
Claims (5)
1. a cylindrical lithium battery overcurrent protection combination cover cap, comprise steel cap, supporting bracket, cage ring, burst disk, sealing ring and thermistor, it is characterized in that described thermistor is the thermistor of surface copper nickel plating, thermistor is between steel cap and burst disk; Described burst disk is spill burst disk, the bottom of burst disk is connected with brace, the tie point arranged outside of brace and burst disk has cage ring II, between brace and burst disk, be provided with supporting bracket, the end of supporting bracket and brace is provided with cage ring I, the end arranged outside that described supporting bracket contacts with brace has through hole, and the outside of described steel cap, burst disk, thermistor and cage ring II is sealed by sealing ring.
2. a kind of cylindrical lithium battery overcurrent protection combination cover cap according to claim 1, is characterized in that the carbon steel that described its material of steel cap is plating nickel on surface.
3. a kind of cylindrical lithium battery overcurrent protection combination cover cap according to claim 1, is characterized in that described burst disk, brace, its material of supporting bracket are fine aluminium.
4. a kind of cylindrical lithium battery overcurrent protection combination cover cap according to claim 1, is characterized in that described its material of sealing ring is polypropylene.
5. a kind of cylindrical lithium battery overcurrent protection combination cover cap according to claim 1, is characterized in that described its material of cage ring I, cage ring II is macromolecular material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420118176.2U CN203910875U (en) | 2014-03-17 | 2014-03-17 | Overcurrent protection combined cap for cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420118176.2U CN203910875U (en) | 2014-03-17 | 2014-03-17 | Overcurrent protection combined cap for cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910875U true CN203910875U (en) | 2014-10-29 |
Family
ID=51785125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420118176.2U Expired - Fee Related CN203910875U (en) | 2014-03-17 | 2014-03-17 | Overcurrent protection combined cap for cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120557A (en) * | 2018-02-05 | 2019-08-13 | 宁德新能源科技有限公司 | Protective device and battery |
-
2014
- 2014-03-17 CN CN201420118176.2U patent/CN203910875U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120557A (en) * | 2018-02-05 | 2019-08-13 | 宁德新能源科技有限公司 | Protective device and battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20210317 |