CN110707262A - Explosion-proof ventilation valve of power battery and battery system using same - Google Patents
Explosion-proof ventilation valve of power battery and battery system using same Download PDFInfo
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- CN110707262A CN110707262A CN201910746456.5A CN201910746456A CN110707262A CN 110707262 A CN110707262 A CN 110707262A CN 201910746456 A CN201910746456 A CN 201910746456A CN 110707262 A CN110707262 A CN 110707262A
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- explosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
An explosion-proof vent valve of a power battery and a battery system using the same relate to the technical field of batteries. The utility model provides an explosion-proof ventilation valve of power battery, it contains the base, the rupture membrane, the deep mark, waterproof ventilated membrane, the block, the fine wire of enameled, the guide wire, the inside through-hole that runs through of base, the rupture membrane has been pasted through hot pressing technology to the one end of base through-hole, the rupture membrane is the plastic-aluminum membrane, be the aluminium lamination in the middle of the rupture membrane, and the rupture membrane both sides are the PP layer, rupture membrane ring intermediate position sets up the deep mark, the rupture membrane inner ring edge adopts hot pressing technology to paste waterproof ventilated membrane, waterproof ventilated membrane is circular structure, and waterproof ventilated membrane is the PTEE membrane, base one side sets up the block, the fine wire of enameled is covered with the setting on the nick surface, fine wire both ends of enameled are equipped with the guide. After the technical scheme is adopted, the invention has the beneficial effects that: the novel electronic clock has the advantages of being simple in structure, reasonable in design, rapid in feedback and accurate in signal, reducing the risk of false alarm and missing report, and being suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an explosion-proof vent valve of a power battery and a battery system using the explosion-proof vent valve.
Background
New energy automobiles are becoming a new development direction of the automobile industry. The world new energy automobile congressions of Bo ao 7/2/2019 are commonly recognized: in the struggle for 2035 years, the market share of new energy automobiles around the world reaches 50%.
Generally speaking, under the normal working condition of a power battery system, the temperature difference exists inside and outside the system, so that the deviation of internal and external air pressure exists, and a waterproof and breathable structure is needed for balancing the air pressure. Meanwhile, when abnormal thermal runaway occurs in a battery core in the battery system, a large amount of gas is generated, the internal pressure is rapidly increased, the risk of thermal runaway of the battery system exists, and the requirements of the comments and manuals of the latest national standard GB safety requirement for lithium ion power storage batteries for electric vehicles are met: the ion battery pack or the system is required to provide a warning signal (serving for the alarm of the thermal accident of the whole vehicle) in advance 5 min before the thermal diffusion caused by the thermal runaway of a single battery and further causing the danger of a passenger compartment to remind passengers to evacuate. Therefore, the battery system must provide signals to the battery management system and feed back the whole vehicle in time.
Disclosure of Invention
The invention aims to provide an explosion-proof vent valve of a power battery and a battery system using the same, aiming at the defects and shortcomings of the prior art, the vent valve has the advantages of simple structure and reasonable design, can quickly detect the opening of an explosion-proof balance valve when a battery core is out of control due to heat, can open a balance pressure release valve when the battery core is out of control due to heat, can open the balance pressure release valve certainly, has the advantages of quick feedback and accurate signal, reduces the risk of false alarm and missed alarm, and is suitable for popularization and use.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an explosion-proof ventilation valve of power battery, it contains base 1, rupture membrane 2, deep mark 21, waterproof ventilated membrane 3, block 4, the fine wire of enameled package 5, guide line 6, base 1 is inside to be equipped with the through-hole that the axial runs through, and base 1 is through crowded aluminium technology shaping, rupture membrane 2 is pasted through hot pressing technology to the one end of base 1 through-hole, rupture membrane 2 is the plastic-aluminum membrane, rupture membrane 2 is ring shape membrane, be the aluminium lamination in the middle of rupture membrane 2, and rupture membrane 2 both sides are the PP layer, rupture membrane ring intermediate position sets up deep mark 21, rupture membrane 2 inner ring border adopts hot pressing technology to paste waterproof ventilated membrane 3, waterproof ventilated membrane 3 is circular structure, and waterproof ventilated membrane 3 is the PTEE membrane, base 1 one side sets up block 4, the fine wire of enameled package 5 is covered with the setting on nick surface 21, the fine wire of enameled package 5 both ends are equipped with guide line 6.
A battery system using the explosion-proof valve is characterized in that the signal transmission flow comprises the following steps: step one, battery thermal runaway; step two, releasing gas rapidly; step three, the air pressure in the battery system is increased sharply; fourthly, breaking the nicks of the explosion-proof membrane by air pressure; fifthly, the score of the explosion-proof membrane is broken; step six, the circuit is electrically shocked to be disconnected or connected; seventhly, detecting the change of the signal at the BMS; and step eight, providing early warning signals for the whole vehicle.
The base 1 is a round base, and the thickness of the base 1 is 10-50 mm.
The thickness of the aluminum layer in the explosion-proof membrane 2 is 0.1-0.5mm, and the thickness of the PP layers on two sides of the explosion-proof membrane 2 is 0.1 mm.
The enameled thin wire 5 is a Z-shaped enameled thin wire.
The side surface of the cap 4 is provided with a plurality of air holes 41.
After the technical scheme is adopted, the invention has the beneficial effects that: its simple structure, reasonable in design when electric core thermal runaway, can listen opening of explosion-proof balanced valve fast, balanced relief valve just can open when electric core thermal runaway, and must open, has the advantage that the feedback is rapid, the signal is accurate, reduces the risk that the wrong report misses, is fit for using widely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of an exploded structure corresponding to FIG. 1;
FIG. 3 is a schematic structural view of the rupture disk 2 of the present invention;
fig. 4 is a flow chart of the signaling of the present invention.
Description of reference numerals: the explosion-proof film comprises a base 1, an explosion-proof film 2, deep marks 21, a waterproof and breathable film 3, a cap 4, air holes 41, enameled thin leads 5 and a guide wire 6.
Detailed Description
Referring to fig. 1 to 4, the technical solution adopted by the present embodiment is: an explosion-proof vent valve of a power battery comprises a base 1, an explosion-proof membrane 2, deep marks 21, a waterproof vent membrane 3, a cover cap 4, an enameled thin lead 5 and a guide line 6, wherein the base 1 is internally provided with a through hole which axially penetrates through the base 1, the through hole and the base 1 are integrally formed, the base 1 is formed by an aluminum extrusion process, one end of the through hole of the base 1 is adhered with the explosion-proof membrane 2 by a hot pressing process, the explosion-proof membrane 2 is made of an aluminum-plastic membrane material, the explosion-proof membrane 2 is of a circular structure, the middle of the explosion-proof membrane 2 is an aluminum layer, two sides of the explosion-proof membrane 2 are PP layers, the middle position of the circular ring of the explosion-proof membrane 2 is engraved with one deep mark 21, the deep mark 21 is engraved with one PP layer, the depth of the notch 21 on the aluminum layer is 10-60% of the thickness of the aluminum layer, the enameled thin lead 5 is distributed on the notch 21 of the explosion-proof membrane 2, a layer of round waterproof breathable film 3 is pasted on the edge of the inner ring of the explosion-proof film 2 by adopting a hot pressing process, the waterproof breathable film 3 is made of PTEE, the base 1, the explosion-proof film 2 and the waterproof breathable film 3 form a closed structure, and the explosion-proof film 2 and the waterproof breathable film 3 are covered by the cover cap 4.
A battery system using the explosion-proof valve is characterized in that the signal transmission flow comprises the following steps: step one, battery thermal runaway; step two, releasing gas rapidly; step three, the air pressure in the battery system is increased sharply; fourthly, breaking the nicks of the explosion-proof membrane by air pressure; fifthly, the score of the explosion-proof membrane is broken; step six, the circuit is electrically shocked to be disconnected or connected; seventhly, detecting the change of the signal at the BMS; and step eight, providing early warning signals for the whole vehicle. When the explosion-proof battery system works normally, the internal and external air pressure difference is adjusted through the waterproof breathable film, once the thermal runaway phenomenon occurs, the internal air pressure of the battery system rises sharply, other objects firstly break the nick of the weakest explosion-proof film, the pressure can be released quickly, and meanwhile, the enameled thin wire on the nick is pulled and broken, so that an open circuit signal is provided and transmitted from the guide wire to inform the battery system of the thermal runaway phenomenon.
The base 1 is a circular base, and the thickness of the base 1 is 10-50 mm.
The thickness of the aluminum layer in the explosion-proof membrane 2 is 0.1-0.5mm, and the thickness of the PP layers on two sides of the explosion-proof membrane 2 is 0.1 mm.
The enameled thin wire 5 is a Z-shaped enameled thin wire.
A plurality of air holes 41 are arranged on four sides of the side edge of the cap 4.
After the technical scheme is adopted, the invention has the beneficial effects that: its simple structure, reasonable in design when electric core thermal runaway, can listen opening of explosion-proof balanced valve fast, balanced relief valve just can open when electric core thermal runaway, and must open, has the advantage that the feedback is rapid, the signal is accurate, reduces the risk that the wrong report misses, is fit for using widely.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The utility model provides an explosion-proof ventilation valve of power battery which characterized in that: the anti-explosion paint comprises a base (1), an anti-explosion membrane (2), a deep mark (21), a waterproof breathable film (3), a cover cap (4), an enameled thin lead (5) and a guide line (6), wherein the base (1) is internally provided with an axially-through hole, the base (1) is formed by an aluminum extrusion process, one end of the through hole of the base (1) is pasted with the anti-explosion membrane (2) by a hot pressing process, the anti-explosion membrane (2) is an aluminum plastic membrane, the anti-explosion membrane (2) is a circular membrane, the middle of the anti-explosion membrane (2) is an aluminum layer, two sides of the anti-explosion membrane (2) are PP layers, the deep mark (21) is arranged in the middle of an anti-explosion membrane ring, the waterproof breathable film (3) is pasted on the edge of an inner ring of the anti-explosion membrane (2) by the hot pressing process, the waterproof breathable film (3) is of a circular structure, the waterproof breathable film (3) is a PTEE membrane, two ends of the enameled thin wire (5) are provided with guide wires (6).
2. A battery system using the explosion-proof valve is characterized in that the signal transmission flow comprises the following steps: step one, battery thermal runaway; step two, releasing gas rapidly; step three, the air pressure in the battery system is increased sharply; fourthly, breaking the nicks of the explosion-proof membrane by air pressure; fifthly, the score of the explosion-proof membrane is broken; step six, the circuit is electrically shocked to be disconnected or connected; seventhly, detecting the change of the signal at the BMS; and step eight, providing early warning signals for the whole vehicle.
3. The explosion-proof vent valve for the power battery as claimed in claim 1, wherein: the base (1) is a round base, and the thickness of the base (1) is 10-50 mm.
4. The explosion-proof vent valve for the power battery as claimed in claim 1, wherein: the thickness of the aluminum layer in the explosion-proof membrane (2) is 0.1-0.5mm, and the thickness of the PP layers on two sides of the explosion-proof membrane (2) is 0.1 mm.
5. The explosion-proof vent valve for the power battery as claimed in claim 1, wherein: the enameled thin wire (5) is a Z-shaped enameled thin wire.
6. The explosion-proof vent valve for the power battery as claimed in claim 1, wherein: the side surface of the cap (4) is provided with a plurality of air holes (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746456.5A CN110707262A (en) | 2019-08-13 | 2019-08-13 | Explosion-proof ventilation valve of power battery and battery system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746456.5A CN110707262A (en) | 2019-08-13 | 2019-08-13 | Explosion-proof ventilation valve of power battery and battery system using same |
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| Publication Number | Publication Date |
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| CN110707262A true CN110707262A (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910746456.5A Pending CN110707262A (en) | 2019-08-13 | 2019-08-13 | Explosion-proof ventilation valve of power battery and battery system using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637259A (en) * | 2020-07-03 | 2020-09-08 | 东莞蒲微防水透气膜材料有限公司 | Explosion-proof valve |
| WO2022109884A1 (en) * | 2020-11-25 | 2022-06-02 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and system therefor, battery, and electrical apparatus |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555468A (en) * | 2001-07-30 | 2004-12-15 | BS&B��ȫ��ϵ�ɷ�����˾ | System and method for monitoring a pressurized system |
| CN2854822Y (en) * | 2005-11-29 | 2007-01-03 | 罗新华 | Explosion-proof device combined with lithium ion battery |
| CN101645495A (en) * | 2008-08-07 | 2010-02-10 | 比亚迪股份有限公司 | Explosion-proof structure and power battery adopting explosion-proof structure |
| CN201562701U (en) * | 2009-11-13 | 2010-08-25 | 天津锦泰勤业精密电子有限公司 | Explosion-proof cover structure for lithium ion battery |
| CN101894932A (en) * | 2010-07-01 | 2010-11-24 | 东莞新能源科技有限公司 | Explosion-proof device of power battery |
| CN201994355U (en) * | 2011-04-12 | 2011-09-28 | 刘怀志 | Riveted anti-explosion cover plate of power battery |
| CN102332545A (en) * | 2011-10-18 | 2012-01-25 | 无锡市金杨新型电源有限公司 | Polar plate type lithium battery cover plate |
| CN102447087A (en) * | 2011-11-29 | 2012-05-09 | 浙江海锂子新能源有限公司 | Early-warning type explosion-proof plug for lithium battery |
| DE102014111041A1 (en) * | 2014-08-04 | 2016-02-04 | Lisa Dräxlmaier GmbH | degassing |
| CN105720222A (en) * | 2016-05-04 | 2016-06-29 | 惠州市沃瑞科技有限公司 | Pressure anti-explosion decompression balance valve utilizing small-sized battery pack |
| CN205578880U (en) * | 2016-03-24 | 2016-09-14 | 厦门医学高等专科学校 | Safety relief valve superpressure automatic monitoring device |
| WO2018003291A1 (en) * | 2016-06-30 | 2018-01-04 | 三洋電機株式会社 | Battery block |
| CN108461837A (en) * | 2018-02-28 | 2018-08-28 | 北京国能电池科技股份有限公司 | Anti-explosion battery manages system and power battery power-supply system |
| CN108565363A (en) * | 2018-06-22 | 2018-09-21 | 深圳市比克动力电池有限公司 | A kind of secondary cell head cover and secondary cell |
| CN108692078A (en) * | 2017-04-06 | 2018-10-23 | 卡尔·弗罗伊登伯格公司 | Pressure equaliser for shell |
| CN208268528U (en) * | 2018-05-02 | 2018-12-21 | 江苏耐玛鑫精密机械有限公司 | A kind of low pressure alarm valve |
| CN109065943A (en) * | 2018-08-17 | 2018-12-21 | 曾荣桂 | A kind of anti-explosion lithium ion battery |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
| CN110081214A (en) * | 2019-05-05 | 2019-08-02 | 东莞蒲微防水透气膜材料有限公司 | A kind of spring control explosion-proof valve and its application |
| WO2019150704A1 (en) * | 2018-01-31 | 2019-08-08 | 三洋電機株式会社 | Method of interrupting inflow current in battery system, battery system, power supply device provided with battery system, and electricity storage device |
-
2019
- 2019-08-13 CN CN201910746456.5A patent/CN110707262A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555468A (en) * | 2001-07-30 | 2004-12-15 | BS&B��ȫ��ϵ�ɷ�����˾ | System and method for monitoring a pressurized system |
| CN2854822Y (en) * | 2005-11-29 | 2007-01-03 | 罗新华 | Explosion-proof device combined with lithium ion battery |
| CN101645495A (en) * | 2008-08-07 | 2010-02-10 | 比亚迪股份有限公司 | Explosion-proof structure and power battery adopting explosion-proof structure |
| CN201562701U (en) * | 2009-11-13 | 2010-08-25 | 天津锦泰勤业精密电子有限公司 | Explosion-proof cover structure for lithium ion battery |
| CN101894932A (en) * | 2010-07-01 | 2010-11-24 | 东莞新能源科技有限公司 | Explosion-proof device of power battery |
| CN201994355U (en) * | 2011-04-12 | 2011-09-28 | 刘怀志 | Riveted anti-explosion cover plate of power battery |
| CN102332545A (en) * | 2011-10-18 | 2012-01-25 | 无锡市金杨新型电源有限公司 | Polar plate type lithium battery cover plate |
| CN102447087A (en) * | 2011-11-29 | 2012-05-09 | 浙江海锂子新能源有限公司 | Early-warning type explosion-proof plug for lithium battery |
| DE102014111041A1 (en) * | 2014-08-04 | 2016-02-04 | Lisa Dräxlmaier GmbH | degassing |
| CN205578880U (en) * | 2016-03-24 | 2016-09-14 | 厦门医学高等专科学校 | Safety relief valve superpressure automatic monitoring device |
| CN105720222A (en) * | 2016-05-04 | 2016-06-29 | 惠州市沃瑞科技有限公司 | Pressure anti-explosion decompression balance valve utilizing small-sized battery pack |
| WO2018003291A1 (en) * | 2016-06-30 | 2018-01-04 | 三洋電機株式会社 | Battery block |
| CN108692078A (en) * | 2017-04-06 | 2018-10-23 | 卡尔·弗罗伊登伯格公司 | Pressure equaliser for shell |
| WO2019150704A1 (en) * | 2018-01-31 | 2019-08-08 | 三洋電機株式会社 | Method of interrupting inflow current in battery system, battery system, power supply device provided with battery system, and electricity storage device |
| CN108461837A (en) * | 2018-02-28 | 2018-08-28 | 北京国能电池科技股份有限公司 | Anti-explosion battery manages system and power battery power-supply system |
| CN208268528U (en) * | 2018-05-02 | 2018-12-21 | 江苏耐玛鑫精密机械有限公司 | A kind of low pressure alarm valve |
| CN108565363A (en) * | 2018-06-22 | 2018-09-21 | 深圳市比克动力电池有限公司 | A kind of secondary cell head cover and secondary cell |
| CN109065943A (en) * | 2018-08-17 | 2018-12-21 | 曾荣桂 | A kind of anti-explosion lithium ion battery |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
| CN110081214A (en) * | 2019-05-05 | 2019-08-02 | 东莞蒲微防水透气膜材料有限公司 | A kind of spring control explosion-proof valve and its application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637259A (en) * | 2020-07-03 | 2020-09-08 | 东莞蒲微防水透气膜材料有限公司 | Explosion-proof valve |
| WO2022109884A1 (en) * | 2020-11-25 | 2022-06-02 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and system therefor, battery, and electrical apparatus |
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