CN102074672A - Explosion-proof device for power battery - Google Patents
Explosion-proof device for power battery Download PDFInfo
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- CN102074672A CN102074672A CN2010106150358A CN201010615035A CN102074672A CN 102074672 A CN102074672 A CN 102074672A CN 2010106150358 A CN2010106150358 A CN 2010106150358A CN 201010615035 A CN201010615035 A CN 201010615035A CN 102074672 A CN102074672 A CN 102074672A
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- proof device
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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
Abstract
The invention discloses an explosion-proof device for a power battery, which comprises a battery top cover with an explosion-proof hole and an explosion-proof diaphragm with a sealing explosion-proof hole, wherein the explosion-proof diaphragm is made of a corrosion resisting material. The explosion-proof diaphragm of the explosion-proof device for the power battery is made of the corrosion resisting material, so the corrosion problem caused by using the metal explosion-proof diaphragm is solved, and the safety performance of the power battery is improved.
Description
Technical field
The present invention relates to a kind of electrokinetic cell, especially a kind of explosion-proof device of power battery with good safety energy.
Background technology
Along with becoming increasingly conspicuous of environmental problem, low-carbon economy has become the main flow of future economy development.Hybrid vehicle and electric automobile have also obtained vast production firm and consumer's approval gradually as the representative of new-energy automobile.Electrokinetic cell has become one of critical component of electric automobile as the major impetus source of new-energy automobile.
The characteristics and the application scenario of electrokinetic cell itself are more special, and the user is very strict to the requirement of aspects such as its capacity, multiplying power, reliability and fail safe.When abnormal conditions occurring, abnormal electrokinetic cell should in time quit work, and it is on fire to blast, and this is the basic demand to the electrokinetic cell fail safe.For this reason, explosion-protection equipment is installed all generally on the electrokinetic cell, explosion-protection equipment is worked automatically when abnormal conditions occurring, avoids producing security incident.
Existing electrokinetic cell uses explosion-proof valve, explosion-proof diaphragm or other blast resistance construction usually, for example, such as Chinese utility model patent CN 200820140350.8 and CN 200920131253.7 announcement, be placed with spicule on the explosion-proof diaphragm, when under the gas pressure effect of explosion-proof diaphragm in battery when protruding upward, can run into spicule and be pierced, thereby realize pressure release and guarantee the security performance of electrokinetic cell to a certain extent.
But in the existing electrokinetic cell, explosion-proof diaphragm generally is to be made by Copper Foil or aluminium foil.Because the rupture pressure disc sheet places electrochemical environment complicated in the battery for a long time, is corroded easily and the inefficacy of boring a hole, and influences the operate as normal of electrokinetic cell, even can bring other potential safety hazard.
In view of this, necessary provide a kind of have good safety can explosion-proof device of power battery.
Summary of the invention
The objective of the invention is to: a kind of explosion-proof device of power battery with good safety energy is provided.
In order to realize the foregoing invention purpose, the invention provides a kind of explosion-proof device of power battery, it comprises battery cap that is provided with explosionproof hole and the explosion-proof diaphragm that seals explosionproof hole, wherein, explosion-proof diaphragm is to be made by resistant material.
As a kind of improvement of explosion-proof device of power battery of the present invention, described explosion-proof diaphragm is the corrosion-resistant plastic film.
As a kind of improvement of explosion-proof device of power battery of the present invention, described corrosion-resistant plastic film is that thickness is poly tetrafluoroethylene or the polypropylene screen of 0.01 ~ 1mm.
As a kind of improvement of explosion-proof device of power battery of the present invention, described explosion-proof diaphragm is provided with the preserving timber bed of material of metal level and covered with metal layer.
As a kind of improvement of explosion-proof device of power battery of the present invention, described metal level is Copper Foil, aluminium foil, nickel foil or iron foil.
As a kind of improvement of explosion-proof device of power battery of the present invention, the described preserving timber bed of material is anticorrosion enamelled coating, bitumen layer, petrolatum layer, antirust oil reservoir, plastic layer or antiseptic rubber layer.
As a kind of improvement of explosion-proof device of power battery of the present invention, described plastic layer is polypropylene layer or polytetrafluoroethylene floor.
As a kind of improvement of explosion-proof device of power battery of the present invention, described antiseptic rubber layer is a fluororubber layer.
As a kind of improvement of explosion-proof device of power battery of the present invention, the described preserving timber bed of material by spraying, press mold, sintering, inlay or mechanical connection is coated on the described metal level.
As a kind of improvement of explosion-proof device of power battery of the present invention, described metal level seals described explosionproof hole behind surperficial anticorrosion with painting material layer, or behind the described explosionproof hole of sealing anticorrosion with painting material layer again.
With respect to prior art, explosion-proof device of power battery of the present invention has the following advantages at least: the explosion-proof diaphragm of explosion-proof device of power battery of the present invention is to be made by resistant material, avoid the etching problem that uses the explosion-proof diaphragm of metal to cause, improved the security performance of electrokinetic cell.
Description of drawings
Below in conjunction with the drawings and specific embodiments, explosion-proof device of power battery of the present invention and its useful technique effect are elaborated.
Figure 1 shows that in the explosion-proof device of power battery of the present invention the interlayer structure schematic diagram of an execution mode of explosion-proof diaphragm.
Figure 2 shows that in the explosion-proof device of power battery of the present invention the assembled state schematic diagram of explosion-proof diaphragm and battery cap.
Figure 3 shows that in the explosion-proof device of power battery of the present invention another assembled state schematic diagram of explosion-proof diaphragm and battery cap.
Embodiment
Explosion-proof device of power battery 10 of the present invention can be installed on the battery container (not shown) of electrokinetic cell, and in order to improve the security performance of electrokinetic cell, it comprises battery cap 20 that offers explosionproof hole 202 and the explosion-proof diaphragm 30 that seals explosionproof hole 202.
Unlike the prior art, in the explosion-proof device of power battery 10 of the present invention, explosion-proof diaphragm 30 is to be made by resistant material.
According to a preferred embodiment of the present invention, explosion-proof diaphragm 30 is to be made by the corrosion-resistant plastic film, and for example, explosion-proof diaphragm 30 can be that thickness is poly tetrafluoroethylene or the polypropylene screen of 0.01 ~ 1mm.The burst pressure of explosion-proof diaphragm 30 is 0.1 ~ 1Mpa, and burst pressure is concentrated, stablized, and is being subjected to high temperature (120 ~ 400 degrees centigrade) meeting deliquescing fusing, can play the effect of high-temperature explosion-proof.
See also shown in Figure 1ly, according to another preferred embodiment of the present invention, explosion-proof diaphragm 30 comprises metal level 302 and is coated on the preserving timber bed of material 304 on the metal level 302.Metal level 302 can be made by rupture pressure disc material commonly used in the electrokinetic cell.For example, according to a preferred embodiment of the present invention, metal level 302 can be Copper Foil, aluminium foil, nickel foil or iron foil.The preserving timber bed of material 304 can be anticorrosion enamelled coating, bitumen layer, petrolatum layer, antirust oil reservoir, plastic layer (as polypropylene layer or polytetrafluoroethylene floor) or antiseptic rubber layer (as fluororubber layer).The thickness of the preserving timber bed of material 304 can be as thin as 20 microns, and is therefore little to the explosion-proof pressure influence of explosion-proof diaphragm 30.In case of necessity, can suitably adjust the thickness of metal level 302, reach the explosion-proof pressure of expectation according to the intensity of the preserving timber bed of material 304.
Explosion-proof diaphragm 30 bubbles that will comprise metal level 302 and be coated on the preserving timber bed of material 304 on the metal level 302 in electrolyte, and in baking box a hot and humid week, do not find that the metal level 302 of explosion-proof diaphragm 30 has signs of corrosion.But, under the same conditions, the bare metal layer that the surface does not coat the preserving timber bed of material have significantly get rusty, signs of corrosion such as perforation, the result shows: the explosion-proof diaphragm 30 that the surface is coated with the preserving timber bed of material 304 has excellent corrosion resisting performance.
The mode that the preserving timber bed of material 304 is coated on the metal level 302 is not particularly limited, as long as can firmly, closely be coated on the metal level 302.For example, according to a preferred embodiment of the present invention, the preserving timber bed of material 304 can be by spraying, press mold, sintering, inlay or mechanical connection is coated on the metal level 302.
The fit of explosion-proof diaphragm 30 is not particularly limited, as long as can seal explosionproof hole 202 well.For example, according to an embodiment of the invention, the explosion-proof diaphragm of being made by the corrosion-resistant plastic film 30 can adopt injection moulding, hot pressing or ultrasonic bonding to be sealed on the explosionproof hole 202 of battery cap 20.The explosion-proof diaphragm 30 that comprises the preserving timber bed of material 304 and metal level 302 can directly be sealed on the explosionproof hole 202 of battery cap 20 by soldering or Reflow Soldering, also can be earlier with metal level 302 seal weldings at anticorrosion with painting material layer 304 on the battery cap 20 and then on metal level 302.
See also shown in Figure 2ly, according to another execution mode of the present invention, explosion-proof diaphragm 30 is that detailed process is by the viscose glue explosionproof hole 202 that is bonded and sealed: at first, put glue around the explosionproof hole 202 of battery cap 20; Secondly, explosion-proof diaphragm 30 is attached to the position that battery cap 20 scribbles glue; At last, withhold a few minutes with flat board, and leave standstill more than 6 hours, it is bonding to reach desirable curing until explosion-proof diaphragm 30 and battery cap 20, and forms good sealing.
According to another execution mode of the present invention, explosion-proof diaphragm 30 also can seal by the mode of extruding or clamping and be installed on the explosionproof hole 202.See also shown in Figure 3, explosion-proof device of power battery 10 comprises that the battery cap 20 that offers explosionproof hole 202, sealing place explosion-proof diaphragm 30 on the explosionproof hole 202, place the packing ring 40 on the explosion-proof diaphragm 30, and with the interior cover 50 of packing ring 40 and explosion-proof diaphragm 30 crush seal explosionproof holes 202.Battery cap 20 is provided with the installing hole 204 that is communicated with explosionproof hole 202, and the battery cap 20 that centers on installing hole 204 is provided with internal thread.The size of interior cover 50 is corresponding with the size of installing hole 204, and lateral wall is provided with external screw thread.Being threaded between the internal thread by battery cap 20 and the external screw thread of interior cover 50 also can will place the tightly compacting and seal explosionproof hole 202 of explosion-proof diaphragm 30 on the explosionproof hole 202 and packing ring 40.
Be understandable that, though in execution mode shown in Figure 3, interior cover 50 and battery cap 20 are by being threaded packing ring 40 and explosion-proof diaphragm 30 to be pressed on the explosionproof hole 202, and realization is to the sealing of explosionproof hole 202, but, according to other execution modes of the present invention, interior cover 50 and battery cap 20 also can be pressed on packing ring 40 and explosion-proof diaphragm 30 on the explosionproof hole 202 by interference engagement, and realize the sealing to explosionproof hole 202.
According to above-mentioned principle, the present invention can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the present invention just for convenience of description.
Claims (10)
1. explosion-proof device of power battery, it comprises the battery cap that is provided with explosionproof hole and the explosion-proof diaphragm of sealing explosionproof hole, it is characterized in that: described explosion-proof diaphragm is to be made by resistant material.
2. explosion-proof device of power battery according to claim 1 is characterized in that: described explosion-proof diaphragm is the corrosion-resistant plastic film.
3. explosion-proof device of power battery according to claim 2 is characterized in that: described corrosion-resistant plastic film is that thickness is poly tetrafluoroethylene or the polypropylene screen of 0.01 ~ 1mm.
4. explosion-proof device of power battery according to claim 1 is characterized in that: described explosion-proof diaphragm is provided with the preserving timber bed of material of metal level and covered with metal layer.
5. explosion-proof device of power battery according to claim 4 is characterized in that: described metal level is Copper Foil, aluminium foil, nickel foil or iron foil.
6. explosion-proof device of power battery according to claim 4 is characterized in that: the described preserving timber bed of material is anticorrosion enamelled coating, bitumen layer, petrolatum layer, antirust oil reservoir, plastic layer or antiseptic rubber layer.
7. explosion-proof device of power battery according to claim 6 is characterized in that: described plastic layer is polypropylene layer or polytetrafluoroethylene floor.
8. explosion-proof device of power battery according to claim 6 is characterized in that: described antiseptic rubber layer is a fluororubber layer.
9. explosion-proof device of power battery according to claim 4 is characterized in that: the described preserving timber bed of material by spraying, press mold, sintering, inlay or mechanical connection is coated on the described metal level.
10. explosion-proof device of power battery according to claim 4 is characterized in that: described metal level seals described explosionproof hole behind surperficial anticorrosion with painting material layer, or behind the described explosionproof hole of sealing anticorrosion with painting material layer again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106150358A CN102074672A (en) | 2010-12-30 | 2010-12-30 | Explosion-proof device for power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106150358A CN102074672A (en) | 2010-12-30 | 2010-12-30 | Explosion-proof device for power battery |
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| CN102074672A true CN102074672A (en) | 2011-05-25 |
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| CN2010106150358A Pending CN102074672A (en) | 2010-12-30 | 2010-12-30 | Explosion-proof device for power battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140072842A1 (en) * | 2012-09-11 | 2014-03-13 | Qiuming Liu | Capacitive battery |
| CN103972429A (en) * | 2013-01-24 | 2014-08-06 | 罗伯特·博世有限公司 | Cell unit having expansion burst region |
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
| CN106684288A (en) * | 2017-01-20 | 2017-05-17 | 池州市骏智机电科技有限公司 | Explosion-proof valve of lithium power battery |
| CN106832695A (en) * | 2017-01-20 | 2017-06-13 | 惠州市沃瑞科技有限公司 | A kind of PTFE films for explosion-proof valve and preparation method thereof |
| CN110391367A (en) * | 2019-08-08 | 2019-10-29 | 宁德时代新能源科技股份有限公司 | Cap assembly for secondary battery and secondary battery |
| CN111864153A (en) * | 2019-04-26 | 2020-10-30 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
Citations (3)
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|---|---|---|---|---|
| CN1983674A (en) * | 2005-12-13 | 2007-06-20 | 中国电子科技集团公司第十八研究所 | Explosion-proof device of lithium series battery |
| CN201436694U (en) * | 2009-06-24 | 2010-04-07 | 东莞新能源科技有限公司 | Power battery liquid injection and explosion proof device |
| CN201562718U (en) * | 2009-10-09 | 2010-08-25 | 深圳市比克电池有限公司 | Battery with new pressure protection device |
-
2010
- 2010-12-30 CN CN2010106150358A patent/CN102074672A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983674A (en) * | 2005-12-13 | 2007-06-20 | 中国电子科技集团公司第十八研究所 | Explosion-proof device of lithium series battery |
| CN201436694U (en) * | 2009-06-24 | 2010-04-07 | 东莞新能源科技有限公司 | Power battery liquid injection and explosion proof device |
| CN201562718U (en) * | 2009-10-09 | 2010-08-25 | 深圳市比克电池有限公司 | Battery with new pressure protection device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140072842A1 (en) * | 2012-09-11 | 2014-03-13 | Qiuming Liu | Capacitive battery |
| WO2014040219A1 (en) * | 2012-09-11 | 2014-03-20 | Liu Qiuming | Capacitor battery |
| CN103972429A (en) * | 2013-01-24 | 2014-08-06 | 罗伯特·博世有限公司 | Cell unit having expansion burst region |
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
| CN105206773B (en) * | 2015-09-24 | 2018-03-06 | 浙江谷神能源科技股份有限公司 | A kind of safety valve for lithium ion battery and its processing method |
| CN106684288A (en) * | 2017-01-20 | 2017-05-17 | 池州市骏智机电科技有限公司 | Explosion-proof valve of lithium power battery |
| CN106832695A (en) * | 2017-01-20 | 2017-06-13 | 惠州市沃瑞科技有限公司 | A kind of PTFE films for explosion-proof valve and preparation method thereof |
| CN111864153A (en) * | 2019-04-26 | 2020-10-30 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN111864153B (en) * | 2019-04-26 | 2021-12-21 | 江苏泛亚微透科技股份有限公司 | Non-breathable explosion-proof membrane, preparation method and power battery explosion-proof valve |
| CN110391367A (en) * | 2019-08-08 | 2019-10-29 | 宁德时代新能源科技股份有限公司 | Cap assembly for secondary battery and secondary battery |
| WO2021022993A1 (en) * | 2019-08-08 | 2021-02-11 | 宁德时代新能源科技股份有限公司 | Secondary battery cover assembly and secondary battery |
| US11949119B2 (en) | 2019-08-08 | 2024-04-02 | Contemporary Amperex Technology Co., Limited | Cover assembly of secondary battery and secondary battery |
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Application publication date: 20110525 |