CN102969469B - A kind of safety valve for high-capacity power lithium battery - Google Patents
A kind of safety valve for high-capacity power lithium battery Download PDFInfo
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- CN102969469B CN102969469B CN201210468220.8A CN201210468220A CN102969469B CN 102969469 B CN102969469 B CN 102969469B CN 201210468220 A CN201210468220 A CN 201210468220A CN 102969469 B CN102969469 B CN 102969469B
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- valve body
- safety valve
- upper valve
- described upper
- lower top
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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 a kind of safety valve for high-capacity power lithium battery, comprise valve body, wherein, described valve body comprises upper valve body and lower valve body, is provided with exhaust passage in described lower valve body, and described upper valve body is cavity structure; The cavity connects of described exhaust passage and described upper valve body; The upper end of described upper valve body cavity is provided with the upper top that can be rotationally connected with described upper valve body, and the lower end being positioned at cavity is provided with lower top, is connected between described Shang Ding with lower top by flexible member; Described lower top is fixed with the seal gasket for sealing exhaust passage; The sidewall of described upper valve body is provided with the steam vent for being vented; Arc structure is arranged in the position that valve body contacts with seal gasket simultaneously, further enhances the stability of safety valve sealing and pressure release, and can, when inside battery produces a large amount of gas, still can guarantee timely and effectively the gas in battery to be discharged; This safety valve has higher stability and fail safe simultaneously, and structure is simple, production cost is lower.
Description
Technical field
The present invention relates to accumulator protection valve technical field, particularly relate to a kind of safety valve for high-capacity power lithium battery.
Background technology
Large-capacity power lithium battery is at abuse or under the abnormal conditions such as misusing, inside can produce a large amount of gas, and therefore the pressure of the inside battery of inside battery may raise rapidly, the dangerous accident such as even to blast.In order to improve the safety in utilization of dynamic lithium battery, generally need mounting safety valve on battery cover board, to get rid of the gas of inside battery generation timely.But general conventional safety valve many employings rupture pressure disc structure, but there is Controlling Technology more complicated in rupture pressure disc, safe voltage limiting value also not easily accurately controls, and there is internal pressure and raise gradually, but do not reach the situation of blast value, therefore easily occur cannot pressure release in time for rupture pressure disc safety valve, may cause safety problem; Simultaneously also there is rupture pressure disc and can only use once in rupture pressure disc safety valve, and due to the size restrictions of safety diaphragm, certain restriction is had to the speed of pressure release, for jumbo electrokinetic cell, the gas that inside battery produces instantaneously is more, and existing safety valve possibly cannot get rid of a large amount of gases of generation timely.
For the problems referred to above, scientific worker improves existing safety valve, as Chinese patent application 200820085759.4 discloses a kind of safety valve, 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, axial rear portion is provided with an air inlet, hollow screw (1) coordinates with valve body (2) at relief hole, one end of spring (3) coordinates with hollow screw (1), the other end coordinates 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), steel ball (5) is engaged between upper valve core (4) and bottom spool (6), although safety valve of structure to some extent solves rupture pressure disc safety valve Problems existing in this, there is the problem that allowance below nominal size is stablized in complex structure sealing and pressure release in it.
Summary of the invention
The object of the invention is to propose a kind of high-capacity dynamical reason battery safety valve, effectively can improve the speed of pressure release, increase the stability of sealing and pressure release, and structure is simple, security performance is high, produces easy to assembly.
For reaching this object, the present invention by the following technical solutions:
A kind of safety valve for high-capacity power lithium battery, comprise valve body, described valve body comprises upper valve body and lower valve body, is provided with exhaust passage in described lower valve body, and described upper valve body is cavity structure;
The cavity connects of described exhaust passage and described upper valve body;
The upper end of described upper valve body cavity is provided with the upper top be rotationally connected with described upper valve body, and the lower end being positioned at cavity is provided with lower top, is connected between described Shang Ding with lower top by flexible member;
Described lower top is fixed with the seal gasket for sealing exhaust passage;
The sidewall of described upper valve body is provided with the steam vent for being vented.
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, described lower top, between seal gasket and the sidewall of described upper valve body, there is certain spacing.
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 upper valve body, and described on push up the alignment pin be provided with for fixing spring.
As a kind of preferred version of above-mentioned safety valve, described lower top is provided with the groove for fixing spring.
As a kind of preferred version of above-mentioned safety valve, described O-ring seal is provided with detent, lower top is provided with positioning convex, described lower top and O-ring seal are by detent and coordinating of positioning convex realizing locating.
As a kind of preferred version of above-mentioned safety valve, be circumferentially uniformly distributed with 6 ~ 12 steam vents at described upper valve body.
As a kind of preferred version of above-mentioned safety valve, described Shang Ding and lower top are Aluminum cylindrical structure.
As a kind of preferred version of above-mentioned safety valve, described lower valve body is provided with the helicitic texture coordinated with battery pressure relief opening.
Beneficial effect of the present invention is: the present invention is by providing a kind of safety valve for high-capacity power lithium battery, it can open exhaust passage under pressure by arranging in safety valve, can automatically reset after pressure release and seal the seal gasket of exhaust passage, can guarantee that the pressure in battery is discharged by safety valve safely and effectively; Arc structure is arranged in the position that valve body contacts with seal gasket simultaneously, further enhances the stability of safety valve sealing and pressure release; And the exhaust passage be arranged on safety valve and the bore of steam vent are comparatively large and the quantity of steam vent is also many, can, when inside battery produces a large amount of gas, still can guarantee timely and effectively the gas in battery to be discharged; The safety valve that the application provides simultaneously has higher stability and fail safe, and structure is simple, production cost is lower.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the safety valve for high-capacity power lithium battery that the specific embodiment of the invention provides;
Fig. 2 is the internal structure schematic diagram of the safety valve for high-capacity power lithium battery that the specific embodiment of the invention provides.
Wherein:
1: valve body; 2: upper valve body; 3: lower valve body; 4: exhaust passage; 5: upper top; 6: lower top; 7: spring; 8: seal gasket; 9: steam vent.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
As shown in Fig. 1 to 2, a kind of safety valve for high-capacity power lithium battery, it comprises valve body 1, this valve body 1 is made up of upper valve body 2 and lower valve body 3, be provided with exhaust passage 4 in 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 cavity is provided with the upper top 5 be rotationally connected with upper valve body 3 simultaneously, the lower end being positioned at cavity is provided with lower top 6, and upper top 5 is connected by flexible member with lower top 6, in this embodiment, upper top 5 and lower top 6 are aluminum design, and flexible member is taper spring 7; Lower top 6 is fixed with the seal gasket 8 for sealing exhaust passage 4, when accumulator internal pressure power raises, top 6 is descended upwards to push up the direction motion of 5 under the influence of air pressure together with seal gasket 8, when distress resolves, lower top 6, under the elastic force effect of spring 7, drives seal gasket 8 to reset and again forms sealing function to exhaust passage 4; The sidewall of upper valve body 2 is provided with the steam vent 9 for being vented, preferably, steam vent 9 is between upper top 5 and lower top 6, and it valve body for the gas discharging of being discharged exhaust passage.
The chamber wall of the bottom of the inner chamber of upper valve body 2, the chamber wall namely contacted with seal gasket 8 is arc structure, and this kind of structure is conducive to the sealing strengthening seal gasket 8, also can strengthen the stability that seal valve loses heart simultaneously.
Lower top 6, between seal gasket 8 and upper valve body 2 intracavity sidewall, there is certain spacing, this spacing is for when top 6 and seal gasket 8 are opened instantly, passing through of the gas of being discharged by exhaust passage 4, namely the effect being communicated with exhaust passage 4 and steam vent 9 is played, simultaneously due to lower top 6, there is spacing between seal gasket 8 and upper valve body 2 intracavity sidewall, the opening and closing of top 6 and seal gasket 8 also conveniently can be descended.
At this execution mode, when flexible member adopts taper spring 7 can ensure that lower top 6 and seal gasket 8 open and close, motion is steady, and then improves the stability of pressure release and the sealing of rubber cushion.
Be threaded connection between upper top 5 and upper valve body 2, and on upper top 5, be provided with groove, this groove can control the rotation of going up top 5 by screwdriver easy to use, elastic force between upper top 5 and lower top 6 can be adjusted easily by adjusting upper top 5 degree of depth screwed in upper valve body 2, achieving the control voltage limiting value of safety and precise.
For the ease of fixing spring 7, and guarantee be vented time cracking pressure stability, upper top 5 is also provided with the alignment pin for fixing spring 7, lower top 6 is provided with the groove for fixing spring, in this embodiment, one end that taper spring 7 diameter is little is socketed on alignment pin, and its other end embeds in the groove on lower top 6, in this, fixed form makes the fixing more firm of spring, the stability of cracking pressure when can guarantee to be vented.
The side that seal gasket 8 coordinates with lower top 6 is provided with detent, lower top 6 is provided with the positioning convex coordinated with this detent, the cooperation of positioning convex and detent can guarantee that seal gasket 8 and lower top 6 fit together closely, is beneficial to the stability of cracking pressure during sealing and the exhaust of seal gasket 8.
In this embodiment, composition valve body upper valve body 2, lower valve body 3, and the exhaust passage 4 in the cavity be arranged in upper valve body 2 and lower valve body 3 is column structure or cylindrical hole, and be also provided with the fin structure for dismantling safety valve in the outside centre position of valve body; In order to improve the pressure release speed of safety valve, the quantity being arranged on the steam vent 9 on upper valve body 2 is 6 ~ 12, and be evenly distributed in upper valve body 2 circumferentially, go up top 5 and lower top 6 is Aluminum cylindrical structure simultaneously, under the installation of conveniently safety valve, valve body is also provided with the helicitic texture matched with battery pressure relief opening.
The operation principle of a kind of safety valve for high-capacity power lithium battery provided in the present invention, when cell internal pressure raises, under the influence of air pressure active force is applied to seal gasket 8, Compress Spring 7 simultaneously, exhaust passage 4 is opened, the gas produced in battery through exhaust passage 4, seal gasket 8 and the space between lower top 6 and upper valve body 2 intracavity sidewall, and be disposed to outside batteries after 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 seal gasket 8 pairs of exhaust passages 4 form the effect of sealing simultaneously; And in the present invention upper between top 5 and upper valve body 2 for being rotatably connected, can by regulating the degree of depth in upper top 5 precession upper valve body 2, in adjustment, the size of pressure between top 5 and lower top 6, can control the safe voltage limiting value of safety valve thus easily; The exhaust passage 4 that safety valve just has aperture larger and a large amount of steam vents 9, even if when inside battery produces larger tolerance, still can guarantee rapid exhaust, reduce inner pressure of battery; So safety valve structure of the present invention is more simple, reasonable, and security performance is high, manufacturing cost is low, easily manufactured simultaneously.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.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 (9)
1. a safety valve for high-capacity power lithium battery, comprises valve body, it is characterized in that, described valve body comprises upper valve body and lower valve body, is provided with exhaust passage in described lower valve body, and described upper valve body is cavity structure;
The cavity connects of described exhaust passage and described upper valve body;
The upper end of described upper valve body cavity is provided with the upper top be rotationally connected with described upper valve body, and the lower end being positioned at cavity is provided with lower top, is connected between described Shang Ding with lower top by flexible member;
Described lower top is fixed with the seal gasket for sealing exhaust passage;
The sidewall of described upper valve body is provided with the steam vent for being vented;
Be threaded connection between described upper top and upper valve body, and be provided with groove on upper top, the rotation of this groove for using screwdriver to control upper top, the degree of depth screwed in upper valve body by adjusting upper top controls voltage limiting value;
The bottom chamber wall of the inner chamber of described upper valve body is arc structure.
2. safety valve according to claim 1, is characterized in that, described lower top, there is certain spacing between seal gasket and the sidewall of described upper valve body.
3. safety valve according to claim 1, is characterized in that, described flexible member is taper spring.
4. safety valve according to claim 3, is characterized in that, is threaded connection between described upper top and upper valve body, and described on push up the alignment pin be provided with for fixing spring.
5. safety valve according to claim 3, is characterized in that, described lower top is provided with the groove for fixing spring.
6. safety valve according to claim 1, is characterized in that, described seal gasket is provided with detent, and lower top is provided with positioning convex, and described lower top and seal gasket are by detent and coordinating of positioning convex realizing locating.
7. safety valve according to claim 1, is characterized in that, is circumferentially uniformly distributed with 6 ~ 12 steam vents at described upper valve body.
8. safety valve according to claim 1, is characterized in that, described Shang Ding and lower top are Aluminum cylindrical structure.
9. safety valve according to claim 1, is characterized in that, described lower valve body is provided with the helicitic texture coordinated with battery pressure relief opening.
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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| Publication Number | Publication Date |
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| CN102969469A CN102969469A (en) | 2013-03-13 |
| CN102969469B true 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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Families Citing this family (8)
| 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 |
| 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 |
| CN109768189B (en) * | 2018-12-17 | 2021-11-02 | 蜂巢能源科技有限公司 | Power battery cover plate |
| KR20220004631A (en) * | 2019-04-26 | 2022-01-11 | 다이니폰 인사츠 가부시키가이샤 | Valve structure for power storage device |
| 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 |
| CN114566751B (en) * | 2021-12-09 | 2023-05-05 | 西安交通大学 | Pressure relief device of lithium battery safety valve |
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 |
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