CN102969469A - Safety valve for high-capacity power lithium battery - Google Patents
Safety valve for high-capacity power lithium battery Download PDFInfo
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- CN102969469A CN102969469A CN2012104682208A CN201210468220A CN102969469A CN 102969469 A CN102969469 A CN 102969469A CN 2012104682208 A CN2012104682208 A CN 2012104682208A CN 201210468220 A CN201210468220 A CN 201210468220A CN 102969469 A CN102969469 A CN 102969469A
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- valve body
- safety valve
- lower top
- upper valve
- safety
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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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Abstract
The invention discloses a safety valve for a high-capacity power lithium battery. The safety valve comprises a valve body, wherein the valve body comprises an upper valve body and a lower valve body. The lower valve body is internally provided with an exhaust channel while the upper valve body is in a cavity structure. The exhaust channel is communicated with the cavity of the upper valve body. An upper top capable of being rotatably connected with the upper valve body is arranged at the upper end of the cavity of the upper valve body. A lower top is arranged at the lower end of the cavity. The upper and lower tops are connected through an elastic element. A sealing rubber mat for sealing the exhaust channel is fixedly arranged on the lower top. An exhaust hole for exhaustion is arranged on the side wall of the upper valve body. Meanwhile, the position where the valve body is contacted with the sealing rubber mat is arranged in an arc-shaped structure, so that the sealing performance and the pressure relieving stability of the safety valve are further enhanced. Gas in the battery can be effectively discharged when massive gas is generated inside the battery. Meanwhile, the safety valve has high stability and high safety, and is simple in structure and low in production cost.
Description
Technical field
The present invention relates to the accumulator protection valve technical field, relate in particular to a kind of large-capacity power lithium battery safety valve.
Background technology
Large-capacity power lithium battery is at abuse or misuse etc. under the abnormal conditions, innerly can produce a large amount of gases, so the pressure of the inside battery of inside battery may raise rapidly, even the dangerous accident such as can blast.In order to improve the safety in utilization of dynamic lithium battery, generally need to be on battery cover board mounting safety valve, in order to get rid of timely the gas that inside battery produces.But general safety valve commonly used adopts the rupture pressure disc structure more, but there is control technique more complicated in rupture pressure disc, safe voltage limiting value also is difficult for accurately control, and exist internal pressure to raise gradually, but do not reach the situation of blast value, therefore in time pressure release of the easy appearance of rupture pressure disc safety valve may cause safety problem; The rupture pressure disc safety valve also exists rupture pressure disc can only use once simultaneously, and because the size restrictions of safety diaphragm, speed to pressure release has certain restriction, for jumbo electrokinetic cell, the gas of inside battery moment generation is more, and existing safety valve possibly can't be got rid of a large amount of gases of generation timely.
For the problems referred to above, the scientific worker improves existing safety valve, a kind of safety valve is disclosed such as Chinese patent application 200820085759.4, it comprises hollow screw (1), valve body (2), spring (3), spool and sealing gasket (7), the axial front portion of valve body (2) is provided with a relief hole, axially the rear portion is provided with an air inlet, hollow screw (1) cooperates with valve body (2) at relief hole, one end of spring (3) cooperates with hollow screw (1), the other end cooperates with spool, it is characterized in that: it also comprises steel ball (5), described spool is divided into upper valve core (4) and bottom spool (6), and steel ball (5) is engaged between upper valve core (4) and the bottom spool (6); Although safety valve of structure has solved the problem that the rupture pressure disc safety valve exists to a certain extent in this, it exists complex structure sealing and pressure release to stablize the problem of allowance below nominal size.
Summary of the invention
The object of the invention is to propose a kind of high-capacity dynamical reason battery safety valve, can effectively improve the speed of pressure release, increased the stability of sealing and pressure release, and simple in structure, and security performance is high, produces easy to assembly.
For reaching this purpose, the present invention by the following technical solutions:
A kind of large-capacity power lithium battery safety valve comprises valve body, and described valve body comprises upper valve body and lower valve body, is provided with the exhaust passage in the described lower valve body, and described upper valve body is cavity structure;
Described exhaust passage is communicated with the cavity of described upper valve body;
The upper end of described upper valve body cavity is provided with the upper top that is rotationally connected with described upper valve body, and the lower end that is positioned at cavity is provided with lower top, is connected by flexible member between described Shang Ding and the lower top;
Be fixed with the seal gasket for the sealing exhaust passage on the described lower top;
Be provided with the steam vent for exhaust on the sidewall of described upper valve body.
As a kind of preferred version of above-mentioned safety valve, the bottom chamber wall of the inner chamber of described upper valve body is arc structure.
As a kind of preferred version of above-mentioned safety valve, there is certain spacing between the sidewall of described lower top, seal gasket and described upper valve body.
As a kind of preferred version of above-mentioned safety valve, described flexible member is taper spring.
As a kind of preferred version of above-mentioned safety valve, be threaded connection between described upper top and the upper valve body, and push up the alignment pin that is provided with for fixing spring on described.
As a kind of preferred version of above-mentioned safety valve, be provided with the groove for fixing spring on the described lower top.
A kind of preferred version as above-mentioned safety valve is provided with detent on the described O-ring seal, is provided with positioning convex on the lower top, and described lower top is realized the location with O-ring seal by cooperating of detent and positioning convex.
As a kind of preferred version of above-mentioned safety valve, be uniformly distributed with 6 ~ 12 steam vents at the circumferencial direction of described upper valve body.
As a kind of preferred version of above-mentioned safety valve, described Shang Ding and lower top are the aluminum column structure.
As a kind of preferred version of above-mentioned safety valve, be provided with the helicitic texture that cooperates with the battery pressure relief opening on the described lower valve body.
Beneficial effect of the present invention is: the present invention is by providing a kind of large-capacity power lithium battery safety valve, it can open the exhaust passage under pressure by arranging in safety valve, after pressure release, can automatically reset and seal the seal gasket of exhaust passage, can guarantee that safety valve discharges the pressure in the battery safely and effectively; Arc structure is arranged in the position that simultaneously valve body is contacted with seal gasket, has further strengthened the stability of safety valve sealing and pressure release; And the bore that is arranged on exhaust passage on the safety valve and steam vent quantity large and steam vent is also many, can when inside battery produces a large amount of gas, still can guarantee timely and effectively the gas in the battery to be discharged; Simultaneously the safety valve that provides of the application has higher stability and fail safe, and is simple in structure, production cost is lower.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the large-capacity power lithium battery safety valve that provides of the specific embodiment of the invention;
Fig. 2 is the internal structure schematic diagram of the large-capacity power lithium battery safety valve that provides of the specific embodiment of the invention.
Wherein:
1: valve body; 2: upper valve body; 3: lower valve body; 4: the exhaust passage; 5: upper top; 6: lower top; 7: spring; 8: seal gasket; 9: steam vent.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Shown in Fig. 1 to 2, a kind of large-capacity power lithium battery safety valve, it comprises valve body 1, this valve body 1 is comprised of upper valve body 2 and lower valve body 3, be provided with exhaust passage 4 in the lower valve body 2, upper valve body 3 is cavity structure, and exhaust passage 4 is connected with the cavity of upper valve body 3; The upper end of upper valve body 2 cavitys is provided with the upper top 5 that is rotationally connected with upper valve body 3 simultaneously, the lower end that is positioned at cavity is provided with lower top 6, and upper top 5 connects by flexible member with lower top 6, in this execution mode, upper top 5 and lower top 6 are aluminum design, and flexible member is taper spring 7; Be fixed with for the seal gasket 8 that seals exhaust passage 4 on lower top 6, when accumulator internal pressure power raises, upwards push up together 5 direction motion at the lower top of the effect of air pressure 6 and seal gasket 8, when pressure disappears, lower top 6 drives seal gasket 8 and resets again to exhaust passage 4 formation sealing functions under the elastic force effect of spring 7; Be provided with the steam vent 9 for exhaust on the sidewall of upper valve body 2, preferred, steam vent 9 is between upper top 5 and lower top 6, and it is used for the gas discharging that discharge the exhaust passage is gone out valve body.
The chamber wall of the bottom of the inner chamber of upper valve body 2 is arc structure with seal gasket 8 contacted chamber walls namely, and this kind structure is conducive to strengthen the sealing of seal gasket 8, also can strengthen the stability that seal valve loses heart simultaneously.
There is certain spacing between lower top 6, seal gasket 8 and upper valve body 2 intracavity sidewalls, this spacing is used for instantly pushing up 6 and seal gasket 8 when opening, passing through of the gas of being discharged by exhaust passage 4, namely play the effect that is communicated with exhaust passage 4 and steam vent 9, simultaneously owing to have spacing between lower top 6, seal gasket 8 and upper valve body 2 intracavity sidewalls, the also conveniently opening and closing of lower top 6 and seal gasket 8.
At this execution mode, it is steady that flexible member adopts taper spring 7 can guarantee that lower top 6 and seal gasket 8 move when opening and closing, and then improved the stability of pressure release and the sealing of rubber cushion.
Be threaded connection between upper top 5 and the upper valve body 2, and be provided with groove on upper top 5, this groove can conveniently use the rotation on the upper top 5 of screwdriver control, screw in the degree of depth in the upper valve bodies 2 and can adjust easily elastic force between upper top 5 and the lower top 6 by adjusting upper top 5, realized the control voltage limiting value of safety and precise.
For the ease of fixing spring 7, and the stability of cracking pressure when guaranteeing exhaust, on upper top 5, also be provided with the alignment pin for fixing spring 7, lower top 6 is provided with the groove for fixing spring, in this execution mode, the end that taper spring 7 diameters are little is socketed on the alignment pin, and its other end embeds in the groove on lower top 6, fixed form makes the fixing more firm of spring, the stability of cracking pressure in the time of can guaranteeing exhaust in this.
In this execution mode, form valve body upper valve body 2, lower valve body 3, and be arranged on cavity in the upper valve body 2 and the exhaust passages 4 in the lower valve body 3 are column structure or cylindrical hole, and also be provided with the fin structure for the dismounting safety valve in the outside centre position of valve body; In order to improve the pressure release speed of safety valve, the quantity that is arranged on the steam vent 9 on the upper valve body 2 is 6 ~ 12, and be evenly distributed on the circumferencial direction of upper valve body 2, upper top 5 and lower top 6 are the aluminum column structure simultaneously, in order also to be provided with the helicitic texture that matches with the battery pressure relief opening on the valve body under the installation of convenient and safe valve.
The operation principle of a kind of large-capacity power lithium battery safety valve that provides among the present invention, when cell internal pressure raises, under the effect of air pressure, seal gasket 8 is applied active force, while Compress Spring 7, exhaust passage 4 is opened, the space of gas between exhaust passage 4, seal gasket 8 and lower top 6 and upper valve body 2 intracavity sidewalls that produces in the battery, and be disposed to outside batteries behind the steam vent 9, after cell internal pressure reduces, lower top 6 and seal gasket 8 reset under the effect of the elastic force of spring 7, and 8 pairs of exhaust passages of seal gasket 4 form the effect of sealing simultaneously; And among the present invention between upper top 5 and the upper valve body 2 for being rotatably connected, can be by regulating the degree of depth in the 5 precession upper valve bodies 2 of upper top, push up in the adjusting 5 and lower top 6 between the size of pressure, can control easily thus the safe voltage limiting value of safety valve; Safety valve just has larger exhaust passage 4, aperture and a large amount of steam vents 9, even when inside battery produces larger tolerance, still can guarantee rapid exhaust, reduces inner pressure of battery; So safety valve structure of the present invention is more simple, reasonable, and security performance is high, and manufacturing cost is low, easily manufactured simultaneously.
Know-why of the present invention has below been described in conjunction with specific embodiments.These are described just in order to explain principle of the present invention, and can not be interpreted as by any way limiting the scope of the invention.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. a large-capacity power lithium battery safety valve comprises valve body, it is characterized in that, described valve body comprises upper valve body and lower valve body, is provided with the exhaust passage in the described lower valve body, and described upper valve body is cavity structure;
Described exhaust passage is communicated with the cavity of described upper valve body;
The upper end of described upper valve body cavity is provided with the upper top that is rotationally connected with described upper valve body, and the lower end that is positioned at cavity is provided with lower top, is connected by flexible member between described Shang Ding and the lower top;
Be fixed with the seal gasket for the sealing exhaust passage on the described lower top;
Be provided with the steam vent for exhaust on the sidewall of described upper valve body.
2. safety valve according to claim 1 is characterized in that, the bottom chamber wall of the inner chamber of described upper valve body is arc structure.
3. safety valve according to claim 2 is characterized in that, has certain spacing between the sidewall of described lower top, seal gasket and described upper valve body.
4. safety valve according to claim 1 is characterized in that, described flexible member is taper spring.
5. safety valve according to claim 4 is characterized in that, is threaded connection between described upper top and the upper valve body, and pushes up the alignment pin that is provided with for fixing spring on described.
6. safety valve according to claim 4 is characterized in that, is provided with the groove for fixing spring on the described lower top.
7. safety valve according to claim 1 is characterized in that, is provided with detent on the described O-ring seal, is provided with positioning convex on the lower top, and described lower top is realized the location with O-ring seal by cooperating of detent and positioning convex.
8. safety valve according to claim 1 is characterized in that, is uniformly distributed with 6 ~ 12 steam vents at the circumferencial direction of described upper valve body.
9. safety valve according to claim 1 is characterized in that, described Shang Ding and lower top are the aluminum column structure.
10. safety valve according to claim 1 is characterized in that, is provided with the helicitic texture that cooperates with the battery pressure relief opening on the described lower valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468220.8A CN102969469B (en) | 2012-11-19 | 2012-11-19 | A kind of safety valve for high-capacity power lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210468220.8A CN102969469B (en) | 2012-11-19 | 2012-11-19 | A kind of safety valve for high-capacity power lithium battery |
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| CN102969469A true CN102969469A (en) | 2013-03-13 |
| CN102969469B CN102969469B (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210468220.8A Active CN102969469B (en) | 2012-11-19 | 2012-11-19 | A kind of safety valve for high-capacity power lithium battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474591A (en) * | 2013-09-26 | 2013-12-25 | 广东志成冠军集团有限公司 | Power lithium battery cover plate assembly and lithium battery with the power lithium battery cover plate assembly |
| CN103489637A (en) * | 2013-09-06 | 2014-01-01 | 安徽赛福电子有限公司 | Safety pressure release explosion-proof valve for capacitor |
| CN106838392A (en) * | 2017-04-06 | 2017-06-13 | 南通四方罐式储运设备制造有限公司 | A kind of bulk container or packing material pressure relief device |
| CN108075087A (en) * | 2017-11-27 | 2018-05-25 | 安徽中能众诚新能源科技有限公司 | A kind of power lithium battery safety valve |
| CN109768189A (en) * | 2018-12-17 | 2019-05-17 | 蜂巢能源科技有限公司 | Cover plate of power battery |
| CN113363662A (en) * | 2021-06-05 | 2021-09-07 | 董光旭 | Explosion-proof safety valve of lithium battery |
| CN113785438A (en) * | 2019-04-26 | 2021-12-10 | 大日本印刷株式会社 | Valve structure for electricity storage device |
| CN114566751A (en) * | 2021-12-09 | 2022-05-31 | 西安交通大学 | Pressure relief device for safety valve of lithium battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983378Y (en) * | 2006-12-15 | 2007-11-28 | 比亚迪股份有限公司 | A secure valve |
| CN201191627Y (en) * | 2008-03-28 | 2009-02-04 | 黄德欢 | Safety valve of lithium ionic cell |
-
2012
- 2012-11-19 CN CN201210468220.8A patent/CN102969469B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983378Y (en) * | 2006-12-15 | 2007-11-28 | 比亚迪股份有限公司 | A secure valve |
| CN201191627Y (en) * | 2008-03-28 | 2009-02-04 | 黄德欢 | Safety valve of lithium ionic cell |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489637A (en) * | 2013-09-06 | 2014-01-01 | 安徽赛福电子有限公司 | Safety pressure release explosion-proof valve for capacitor |
| CN103474591A (en) * | 2013-09-26 | 2013-12-25 | 广东志成冠军集团有限公司 | Power lithium battery cover plate assembly and lithium battery with the power lithium battery cover plate assembly |
| CN106838392A (en) * | 2017-04-06 | 2017-06-13 | 南通四方罐式储运设备制造有限公司 | A kind of bulk container or packing material pressure relief device |
| CN108075087A (en) * | 2017-11-27 | 2018-05-25 | 安徽中能众诚新能源科技有限公司 | A kind of power lithium battery safety valve |
| CN108075087B (en) * | 2017-11-27 | 2020-07-07 | 安徽中能众诚新能源科技有限公司 | Power lithium battery safety valve |
| CN109768189A (en) * | 2018-12-17 | 2019-05-17 | 蜂巢能源科技有限公司 | Cover plate of power battery |
| CN113785438A (en) * | 2019-04-26 | 2021-12-10 | 大日本印刷株式会社 | Valve structure for electricity storage device |
| CN113363662A (en) * | 2021-06-05 | 2021-09-07 | 董光旭 | Explosion-proof safety valve of lithium battery |
| CN113363662B (en) * | 2021-06-05 | 2023-04-11 | 广东省华米时代新能源科技有限公司 | Explosion-proof safety valve of lithium battery |
| CN114566751A (en) * | 2021-12-09 | 2022-05-31 | 西安交通大学 | Pressure relief device for safety valve of lithium battery |
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| Publication number | Publication date |
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| CN102969469B (en) | 2015-11-04 |
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