CN2854822Y - Explosion-proof device combined with lithium ion battery - Google Patents
Explosion-proof device combined with lithium ion battery Download PDFInfo
- Publication number
- CN2854822Y CN2854822Y CNU2005200680124U CN200520068012U CN2854822Y CN 2854822 Y CN2854822 Y CN 2854822Y CN U2005200680124 U CNU2005200680124 U CN U2005200680124U CN 200520068012 U CN200520068012 U CN 200520068012U CN 2854822 Y CN2854822 Y CN 2854822Y
- Authority
- CN
- China
- Prior art keywords
- connection sheet
- pressure disc
- brace
- rupture pressure
- rupture membrane
- 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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- 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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a combined cap explosion-proof device for lithium ion battery, which has a rupture membrane. The utility model is characterized by: the rupture membrane contacts with an upper connection sheet via an inner connection sheet; peripheries of the rupture membrane, inner connection sheet and upper connection sheet are sealed and tightly combined by a seal ring; the rupture membrane and lower connection sheet are partially isolated and insulated via an isolation ring, and contact merely via two welding points; two circles of dents with certain depth are respectively disposed on the rupture membrane along circumferential direction; and the two welding points between the rupture membrane and lower connection sheet have spherical convex head (bump) structure at the contact site. Beneficial effects of the utility model lie in: no shortcomings of existing technology, destruction resistance of welding points, precise rupture of welding points and opening pressure range of safety valve, high stability of battery performance, long service life on the premise of safety, and saved energy.
Description
Technical field
The utility model relates to a kind of lithium ion battery, especially relates to a kind of combination cover cap explosion-protection equipment of column lithium ion battery.
Background technology
Secondary lithium battery is widely used in the industrial production, because the safety in utilization requirement of battery, on battery body, all be provided with anti-explosion safety device, when battery is short-circuited, overcharge or other reasons, the inside battery energy sharply discharges, air pressure inside will increase, solder joint comes off when air pressure reaches certain pressure, and charging current can not conducting, when air pressure continue to raise reach explosion-protection equipment bear the limit time, the anti-explosion safety opening of valves, discharge gases at high pressure, cell internal pressure is reduced, thereby reaches the purpose that prevents battery explosion.Known in the market secondary lithium battery, especially the combination cover cap of column lithium ion battery, the sealing ring of its brace and rupture pressure disc and cage ring are to adopt the integral type design, be that sealing ring and cage ring are connected as a single entity, and the solder joint between rupture pressure disc and the brace adopts general bump design, the defective of this structure is that the solder joint when causing the battery body sealing easily destroys, the safety valve pressure scope is inaccurate and battery performance is unstable, under normal circumstances solder joint is in a single day destroyed, entire cell has just been scrapped, also caused the waste of the energy, described defective value must improve.
The content of innovation and creation
The purpose of this utility model is at the deficiencies in the prior art, a kind of combination cover cap explosion-protection equipment of lithium ion battery is provided, the structure that the utility model adopts, can overcome the defective of prior art, make the solder joint of battery combination block explosion-protection equipment be not easy destroyed, the safety valve pressure scope is more accurate, thereby makes battery performance stable, saves the energy.
The technical solution of the utility model is such: the combination cover cap explosion-protection equipment that a kind of lithium ion battery is provided, comprise a rupture pressure disc, it is characterized in that, rupture pressure disc contacts with last brace by an interior brace, rupture pressure disc and interior brace and last brace marginal portion are fitted tightly the three by a sealing ring sealing, carry out the part isolated insulation by a cage ring between rupture pressure disc and the following brace, between the two only by two solder joint contacts (current lead-through place).
According to the utility model of said structure, its feature is that also the ring circumferencial direction of rupture pressure disc is respectively arranged with the inner ring recess indentation and the outer ring recess indentation of two circle certain depths.
According to the utility model of said structure, its feature also is, rupture pressure disc and following brace between two solder joint contact positions be spherical nose (salient point) structure.
The utility model according to said structure; its beneficial effect is; it make rupture pressure disc and last brace and and following brace between sealing ring and cage ring branch be arranged; and explosion-proof zona circumferencial direction is respectively arranged with the recess indentation of two circle certain depths; the solder joint place adopts the plush copper structure; can overcome the defective of prior art like this; make the solder joint of battery combination block explosion-protection equipment be not easy destroyed; solder joint breaks (first pipe protection) and rupture pressure disc safety valve unlatching (second pipe protection) range of pressure values is more accurate; thereby make battery performance stable; lasting in the following life-span of prerequisite that guarantees safe handling, saved the energy.
Description of drawings
Below in conjunction with the drawings and the specific embodiments the utility model is described in detail.
Shown in Figure 1 is the utility model profile;
Shown in Figure 2 is A part amplification rearview among Fig. 1;
Shown in Figure 3 is the utility model rupture pressure disc profile;
Shown in Figure 4 is B part amplification rearview among Fig. 3;
Shown in Figure 5 is C part amplification rearview among Fig. 1;
In the drawings, 1, go up brace; 2, sealing ring; 3, interior brace; 32, rupture pressure disc; 33, cage ring; 34, following brace; 35, solder joint; 36, inner ring recess indentation; 37, plush copper; 38, outer ring recess indentation
Embodiment
In conjunction with Fig. 1, shown in Figure 2, a kind of combination cover cap explosion-protection equipment of lithium ion battery, comprise a rupture pressure disc 32, it is characterized in that, rupture pressure disc 32 contacts with last brace 1 by an interior brace 3, rupture pressure disc 32 and interior brace 3 and last brace 1 marginal portion are fitted tightly the three by 2 sealings of a sealing ring, carry out the part isolated insulation by a cage ring 33 between rupture pressure disc 32 and the following brace 34, between the two only by 35 contacts (current lead-through place) of two solder joints.
As Fig. 3, Fig. 4, shown in Figure 5, the ring circumferencial direction of rupture pressure disc 32 of the present utility model is respectively arranged with the inner ring recess indentation 36 and the outer ring recess indentation 38 of two circle certain depths, inner ring recess indentation 36 is the safety valve of rupture pressure disc 32, when the destroyed back of solder joint inside battery air pressure continue to increase to safety valve bear the limit time, fracture can appear in inner ring recess indentation 36 places, thereby the discharge gases at high pressure guarantee battery security after the pressure release.
In conjunction with Fig. 1, shown in Figure 5, the bottom margin of sealing ring 2 is partly with a little projection, and outer ring recess indentation 38 and this jut of rupture pressure disc 32 coincide, and have guaranteed the sealing function of sealing ring 2.
According to the utility model of said structure, its feature also is, rupture pressure disc 32 and following brace 34 between two solder joint 35 contact positions be spherical nose 37 (salient point) structure.
Claims (3)
1, a kind of combination cover cap explosion-protection equipment of lithium ion battery, comprise a rupture pressure disc (32), it is characterized in that, rupture pressure disc (32) contacts with last brace (1) by an interior brace (3), rupture pressure disc (32) and interior brace (3) and last brace (1) marginal portion are fitted tightly the three by a sealing ring (2) sealing, carry out the part isolated insulation by a cage ring (33) between rupture pressure disc (32) and the following brace (34), between the two only by two solder joints (35) contact.
2, the combination cover cap explosion-protection equipment of lithium ion battery according to claim 1, its feature is that also the ring circumferencial direction of rupture pressure disc of the present utility model (32) is respectively arranged with the inner ring recess indentation (36) and the outer ring recess indentation (38) of two circle certain depths.
3, the combination cover cap explosion-protection equipment of lithium ion battery according to claim 1, its feature also be, rupture pressure disc (32) and following brace (34) between two solder joints (35) contact position be spherical nose (37) structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200680124U CN2854822Y (en) | 2005-11-29 | 2005-11-29 | Explosion-proof device combined with lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200680124U CN2854822Y (en) | 2005-11-29 | 2005-11-29 | Explosion-proof device combined with lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2854822Y true CN2854822Y (en) | 2007-01-03 |
Family
ID=37581458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200680124U Expired - Fee Related CN2854822Y (en) | 2005-11-29 | 2005-11-29 | Explosion-proof device combined with lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2854822Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777634A (en) * | 2010-03-16 | 2010-07-14 | 周卫炳 | High-magnification cylindrical explosion-proof composite cap for lithium ion battery |
| CN102088064A (en) * | 2011-01-04 | 2011-06-08 | 无锡市金杨新型电源有限公司 | Novel battery cover cap structure |
| CN101931069B (en) * | 2009-06-18 | 2012-10-31 | 常州剑湖金城车辆设备有限公司 | Lithium cell safety valve |
| CN103872268A (en) * | 2012-12-12 | 2014-06-18 | 罗伯特·博世有限公司 | Housing for a gas-tight rechargeable battery |
| CN107634157A (en) * | 2017-09-19 | 2018-01-26 | 东莞市奕东电子有限公司 | A kind of the stable response method and its capping structure of power lithium battery power-off protection |
| CN110707262A (en) * | 2019-08-13 | 2020-01-17 | 力赛凡科技有限公司 | Explosion-proof ventilation valve of power battery and battery system using same |
| TWI704712B (en) * | 2018-04-23 | 2020-09-11 | 大陸商比亞迪股份有限公司 | Battery cover assembly, single battery, battery module, power battery and electric vehicle |
-
2005
- 2005-11-29 CN CNU2005200680124U patent/CN2854822Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931069B (en) * | 2009-06-18 | 2012-10-31 | 常州剑湖金城车辆设备有限公司 | Lithium cell safety valve |
| CN101777634A (en) * | 2010-03-16 | 2010-07-14 | 周卫炳 | High-magnification cylindrical explosion-proof composite cap for lithium ion battery |
| CN102088064A (en) * | 2011-01-04 | 2011-06-08 | 无锡市金杨新型电源有限公司 | Novel battery cover cap structure |
| CN103872268A (en) * | 2012-12-12 | 2014-06-18 | 罗伯特·博世有限公司 | Housing for a gas-tight rechargeable battery |
| CN103872268B (en) * | 2012-12-12 | 2016-05-11 | 罗伯特·博世有限公司 | For the housing of airtight battery |
| CN107634157A (en) * | 2017-09-19 | 2018-01-26 | 东莞市奕东电子有限公司 | A kind of the stable response method and its capping structure of power lithium battery power-off protection |
| TWI704712B (en) * | 2018-04-23 | 2020-09-11 | 大陸商比亞迪股份有限公司 | Battery cover assembly, single battery, battery module, power battery and electric vehicle |
| CN110707262A (en) * | 2019-08-13 | 2020-01-17 | 力赛凡科技有限公司 | Explosion-proof ventilation valve of power battery and battery system using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |