CN201590443U - Explosion-protection valve for lithium-ion storage battery - Google Patents
Explosion-protection valve for lithium-ion storage battery Download PDFInfo
- Publication number
- CN201590443U CN201590443U CN2009202643414U CN200920264341U CN201590443U CN 201590443 U CN201590443 U CN 201590443U CN 2009202643414 U CN2009202643414 U CN 2009202643414U CN 200920264341 U CN200920264341 U CN 200920264341U CN 201590443 U CN201590443 U CN 201590443U
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- Prior art keywords
- explosion
- pressure disc
- rupture pressure
- storage battery
- ion storage
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- 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 an explosion-protection valve for a lithium-ion storage battery, which has simple structure and high safety and reliability. The explosion-protection valve comprises a valve body (1), a needle body (2) and an explosion-protection film (3), wherein a vent hole (4) is formed on the valve body (1), the needle body (2) is fixedly connected at the upper end of the vent hole (4), a tapered contact pin (5) is arranged on the lower surface of the needle body (2), the explosion-protection film (3) is arranged at the lower end of the vent hole (4) and in a sealed assembly with the valve body (1), and the tapered contact pin (5) points to the explosion-protection film (3). The explosion-protection film (3) is made of ethylene propylene terpolymer, thereby achieving good elasticity, large thickness and low possibility of breakage. Compared with the prior art which adopts copper foil, aluminum foil or other meal materials as the raw material of the explosion-protection film, the utility model can greatly improve the safety and reliability of the battery and prolong the service life thereof.
Description
Technical field
The utility model relates to a kind of explosion-proof valve of lithium ion storage battery.
Background technology
Since 21 century, people place hope on the progress of new energy technology more and more consumingly to relax the nervous situation of non-renewable resources such as present oil.Lithium ion battery since energy than big, compliance with environmental protection requirements and be subjected to special favor, but the fail safe of lithium ion battery is the significant problem that people's common concern is concerned about.Common lithium ion battery mainly adopts the explosion-protection equipment of modes such as indentation, weldering rupture pressure disc as battery, inside battery heats up and causes air pressure to increase, explosion-protection equipment is understood sealing-off or is broken when pressure increases to a certain degree, avoid battery explosion, but such explosion-protection equipment can not be controlled the pressure that destroys explosion-protection equipment accurately, the starting pressure value is also bigger, often can not realize the pressure release of exitting under battery reaches the situation of rated pressure, causes the accident.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of simple in structure, explosion-proof valve of lithium ion storage battery that security reliability is high is provided.
The technical scheme that the utility model adopted is: the utility model comprises valve body, needle body and rupture pressure disc, described valve body is provided with air vent hole, described needle body is fixedly connected on the upper end of described air vent hole, the lower surface of described needle body is provided with the taper contact pilotage, described rupture pressure disc is arranged on the lower end of described air vent hole and assembles with described valve seal, and described taper contact pilotage points to described rupture pressure disc.
Described needle body is strip, has groove at the upper surface of described valve body, and described needle body is fixedly installed in the described groove.
Setpoint distance is 1～7mm between described taper contact pilotage and the described rupture pressure disc.
The optimum distance of setting between described taper contact pilotage and the described rupture pressure disc is 5.5mm.
The thickness of described rupture pressure disc is 0.1～0.3mm, is to be raw material with the ethylene propylene diene rubber, adds additives such as 0.5～1% zinc oxide, 0.5～1% carbon black, 2%～5% stearic acid, 0～0.5% age resistor and 0～0.5% dispersant by weight and makes.
The optimum thickness of described rupture pressure disc is 0.2mm.
Described valve body is provided with external screw thread, fixedlys connected with the cover plate of storage battery and compresses described rupture pressure disc by external screw thread.
Periphery at described rupture pressure disc is provided with a convex clip, and described valve body is pressed in the inboard of described convex clip.
The beneficial effects of the utility model are: because the utility model comprises valve body, needle body and rupture pressure disc, the three is the split type installation of individual components, and is simple in structure; The lower surface of described needle body is provided with the taper contact pilotage, and described taper contact pilotage points to described rupture pressure disc, adopts the combining structure of taper contact pilotage and rupture pressure disc to realize the pressure release of exitting, and can guarantee under rated pressure rupture pressure disc to be broken the reliability height accurately; Because setpoint distance is 1～7mm and can regulates as required between described taper contact pilotage and the described rupture pressure disc, can adapt to the battery of different model.
Owing to generally use the rupture pressure disc of metal materials making such as Copper Foil, aluminium foil at present in the industry, it is under level pressure power, also can explosion and reach explosion-proof effect, but because he is a metal, elasticity is less, be difficult for sealing, and material character is more crisp, thinner thickness is run into because of carelessness and is broken easily and cause waste product being subjected to extraneous power such as finger nail.And the rupture pressure disc elasticity of making of ethylene propylene diene rubber in the utility model is better, with miscellaneous part compress promptly can realize the sealing, and thickness is bigger, can not break easily, when making, also can add elasticity and the useful life that additives such as 0.5～1% zinc oxide, 0.5～1% carbon black, 2%～5% stearic acid, 0～0.5% age resistor and 0～0.5% dispersant improve rupture pressure disc in addition.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of valve body in the utility model;
Fig. 3 is the structural representation of rupture pressure disc in the utility model;
Fig. 4 is the sectional schematic diagram of rupture pressure disc in the utility model;
Fig. 5 is the structural representation of the utility model explosion-proof valve under rupture pressure disc dilatancy situation;
Fig. 6 is that rupture pressure disc is out of shape schematic diagram in the utility model under different pressures.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises valve body 1, needle body 2 and rupture pressure disc 3, described valve body 1 is provided with circular air vent hole 4, described needle body 2 is fixedly connected on the upper end of described air vent hole 4, the lower surface of described needle body 2 is provided with taper contact pilotage 5, described rupture pressure disc 3 is arranged on the lower end of described air vent hole 4 and assembles with described valve body 1 sealing, and described taper contact pilotage 5 points to described rupture pressure disc 3.Needle body 2 is flat strip, upper surface at described valve body 1 has corresponding grooves 6, described needle body 2 is fixedly welded in described groove 6, because air vent hole 4 is a circular hole, the needle body 2 that is fixedly welded on the valve body is flat, air vent hole 4 can be do not stopped up fully, the smooth pressure release of gas inside can be guaranteed like this.Be 1～7mm according to the explosion-proof pressure setpoint distance between above-mentioned taper contact pilotage 5 and the described rupture pressure disc 3, can regulate according to the battery of various different models.
When 7 assemblings of explosion-proof valve and battery cover board, because described valve body 1 is provided with external screw thread, is put into rupture pressure disc 3 on the platform 9 of explosionproof hole of cover plate 7 earlier during use and is adjacent to, put into externally threaded valve body 1 then, valve body 1 is screwed to compress rupture pressure disc 3.Rupture pressure disc 3 can be heaved gradually along with the increase of inner pressure of battery, and after inner pressure of battery acquired a certain degree, rupture pressure disc 3 can contact taper contact pilotages 5 and cause piercing through so that venting and reach explosion-proof purpose.As shown in Figure 5 because rupture pressure disc 3 has certain distance with taper contact pilotage 5, so under safe pressure, though rupture pressure disc 3 heave, not exhaust, thus prolonged battery life.
See Fig. 3 and Fig. 4 in addition, can also on the periphery of rupture pressure disc 3, be arranged to the shape of a convex clip 8, when rupture pressure disc 3 assembles mutually with the platform 9 of the explosionproof hole of cover plate 7, earlier convex clip 8 is matched with screens on the platform 9, be tightened on the cover plate 7 with valve body 1 again, described valve body 1 mechanical compaction is in the inboard of described convex clip 8, and this structure has improved the sealing of assembling herein greatly.
Compare the rupture pressure disc that metal materials such as generally using Copper Foil, aluminium foil in the present industry is made, the rupture pressure disc of present embodiment is to be that raw material are made with the ethylene propylene diene rubber, ethylene propylene diene rubber is a kind of elastomeric material of high-quality, it has excellent acid alkalescence, chemical reaction can not take place in lithium-ion electrolyte.Be on the raw-material basis with ethylene propylene diene rubber, can also add additives such as 0.5～1% zinc oxide, 0.5～1% carbon black, 2%～5% stearic acid, 0～0.5% age resistor, 0～0.5% dispersant by weight, the related rupture pressure disc of cost of manufacture utility model under normal pressure, 100～150 ℃ of temperature.Its thickness is 0.1～0.3mm, has good deformation nature, and this thickness increases according to the increase of different battery explosion air pressure, specifically sees the following form:
| Sequence number | Rupture pressure disc thickness (mm) | Explosion air pressure (kg/cm2) |
| 0 | 0.10 | 0.3 |
| 1 | 0.15 | 0.5 |
| 2 | 0.192 | 0.9 |
| 5 | 0.195 | 1.0 |
| 4 | 0.205 | 1.0 |
| 3 | 0.213 | 1.0 |
| 6 | 0.22 | 1.2 |
| 7 | 0.25 | 1.5 |
| 8 | 0.3 | 1.8 |
The concrete explosion-proof valve made from the ethylene propylene diene rubber rupture pressure disc of 0.2mm thickness, point of a knife and rupture pressure disc are apart from 5.5mm, explosion-proof valve distortion schematic diagram as shown in Figure 6, when rupture pressure disc was in the A position, rupture pressure disc did not expand and is not out of shape, and pressure is 0MPa, Deformation Height is 0mm, because internal positive pressure expands gradually, when being in the B position, pressure is 0.25MPa when rupture pressure disc, Deformation Height is 2.5mm, when further being in the C position, pressure is 0.5MPa, and Deformation Height is 4mm, when further being in the D position, pressure is 0.75MPa, and Deformation Height is 5mm, at last when rupture pressure disc arrival E position, pressure is 0.1MPa, Deformation Height is 5.8mm, and the height that rupture pressure disc is heaved surpasses the distance of point of a knife and rupture pressure disc and causes the edge of a knife to pierce through rupture pressure disc, and battery loses heart and reaches explosion-proof effect.
Claims (8)
1. explosion-proof valve of lithium ion storage battery, comprise valve body (1), needle body (2) and rupture pressure disc (3), it is characterized in that: described valve body (1) is provided with air vent hole (4), described needle body (2) is fixedly connected on the upper end of described air vent hole (4), the lower surface of described needle body (2) is provided with taper contact pilotage (5), described rupture pressure disc (3) is arranged on the lower end of described air vent hole (4) and assembles with described valve body (1) sealing, and described taper contact pilotage (5) points to described rupture pressure disc (3).
2. explosion-proof valve of lithium ion storage battery according to claim 1 is characterized in that: described needle body (2) is strip, has groove (6) at the upper surface of described valve body (1), and described needle body (2) is fixedly installed in the described groove (6).
3. explosion-proof valve of lithium ion storage battery according to claim 1 is characterized in that: setpoint distance is 1～7mm between described taper contact pilotage (5) and the described rupture pressure disc (3).
4. explosion-proof valve of lithium ion storage battery according to claim 3 is characterized in that: setpoint distance is 5.5mm between described taper contact pilotage (5) and the described rupture pressure disc (3).
5. explosion-proof valve of lithium ion storage battery according to claim 1 is characterized in that: the thickness of described rupture pressure disc (3) is 0.1～0.3mm.
6. explosion-proof valve of lithium ion storage battery according to claim 5 is characterized in that: the thickness of described rupture pressure disc (3) is 0.2mm.
7. according to each described explosion-proof valve of lithium ion storage battery of claim 1 to 6, it is characterized in that: described valve body (1) is provided with external screw thread, fixedlys connected with the cover plate (7) of storage battery and compresses described rupture pressure disc (3) by external screw thread.
8. according to each described explosion-proof valve of lithium ion storage battery of claim 1 to 6, it is characterized in that: the periphery at described rupture pressure disc (3) is provided with a convex clip (8), and described valve body (1) is pressed in the inboard of described convex clip (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202643414U CN201590443U (en) | 2009-12-08 | 2009-12-08 | Explosion-protection valve for lithium-ion storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202643414U CN201590443U (en) | 2009-12-08 | 2009-12-08 | Explosion-protection valve for lithium-ion storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590443U true CN201590443U (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202643414U Expired - Fee Related CN201590443U (en) | 2009-12-08 | 2009-12-08 | Explosion-protection valve for lithium-ion storage battery |
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| Country | Link |
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| CN (1) | CN201590443U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790190A (en) * | 2012-08-14 | 2012-11-21 | 河南能驰电源有限公司 | Connecting structure for anti-explosion film and cover plate |
| CN104425786A (en) * | 2013-08-29 | 2015-03-18 | 天津中聚新能源科技有限公司 | Battery explosion-proof structure and battery comprising battery explosion-proof structure |
| CN105702898A (en) * | 2016-05-04 | 2016-06-22 | 惠州市沃瑞科技有限公司 | Quick pressure relief balance valve applied to battery pack |
| CN107306669A (en) * | 2017-08-15 | 2017-11-03 | 贵州天圣绿野生物科技有限公司 | A kind of mushroom mating system |
-
2009
- 2009-12-08 CN CN2009202643414U patent/CN201590443U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790190A (en) * | 2012-08-14 | 2012-11-21 | 河南能驰电源有限公司 | Connecting structure for anti-explosion film and cover plate |
| CN104425786A (en) * | 2013-08-29 | 2015-03-18 | 天津中聚新能源科技有限公司 | Battery explosion-proof structure and battery comprising battery explosion-proof structure |
| CN104425786B (en) * | 2013-08-29 | 2017-03-29 | 天津中聚新能源科技有限公司 | Battery anti-explosion structure and the battery including which |
| CN105702898A (en) * | 2016-05-04 | 2016-06-22 | 惠州市沃瑞科技有限公司 | Quick pressure relief balance valve applied to battery pack |
| CN107306669A (en) * | 2017-08-15 | 2017-11-03 | 贵州天圣绿野生物科技有限公司 | A kind of mushroom mating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHUHAI LITHIUM NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHUHAI LITHIUM ENERGY POWER INVESTMENT CO., LTD. Effective date: 20110303 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 519000 UNIT 5, 24/F, OFFICE BUILDING, YUECAI BUILDING, NO.188, JINGSHAN ROAD, JIDA, ZHUHAI CITY, GUANGDONG PROVINCE TO: 519015 2406, OFFICE BUILDING, YUECAI BUILDING, NO.188, JINGSHAN ROAD, JIDA, ZHUHAI CITY, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110303 Address after: 519015 Guangdong province Zhuhai Jida Jingshan Hill Road No. 188 Yuecai building office building 2406 Patentee after: Zhuhai Liyuan New Energy Technology Co., Ltd. Address before: 519000 Guangdong province Zhuhai Jida Jingshan Hill Road No. 188 Yuecai building 24 storey office building 5 unit Patentee before: Lithium Energy Power Investment Co., Ltd. |
|
| 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: 20100922 Termination date: 20161208 |