CN201681988U - 锂离子电池安全阀 - Google Patents

锂离子电池安全阀 Download PDF

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Publication number
CN201681988U
CN201681988U CN2010202009154U CN201020200915U CN201681988U CN 201681988 U CN201681988 U CN 201681988U CN 2010202009154 U CN2010202009154 U CN 2010202009154U CN 201020200915 U CN201020200915 U CN 201020200915U CN 201681988 U CN201681988 U CN 201681988U
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China
Prior art keywords
valve
lithium ion
battery
ion battery
safety valve
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Expired - Fee Related
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CN2010202009154U
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English (en)
Inventor
陆亚山
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Shuangdeng Science & Technology Development Academy Co Ltd Nanjing City
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Shuangdeng Science & Technology Development Academy Co Ltd Nanjing City
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Gas Exhaust Devices For Batteries (AREA)

Abstract

本实用新型公开了一种锂离子电池安全阀,阀体内腔设有锥形阀口和与之配合的钢球,钢球由弹簧和定位件压紧,阀体内腔端口处设有滤水片。所述滤水片为微孔聚丙烯圆片,孔径0.1~10μm,孔隙率25~70%。本实用新型安装于电池壳体上,以钢球为阀芯,开闭灵活,不会卡死,滤水片能顺利排出电池内部气体,避免电池气涨爆裂,而有效阻止外界含水气体进入电池内部,对电池起到保护作用。

Description

锂离子电池安全阀
技术领域
本实用新型涉及一种蓄电池安全阀,特别是用于锂离子电池的安全阀。
背景技术
锂离子电池在二次电池领域中占有举足轻重的地位,在所有水溶液电源体系中,锂离子蓄电池凭借其较高的工作电压,较好的大电流放电性能和较高的能量密度等优势,已广泛应用于备用电源、能量贮备、动力能源等领域。
现在锂离子蓄电池技术已相当成熟,特别是硬壳锂离子电池的产生,使得人们在使用方面更为方便简洁。但由于锂电池不可以过充或过放,一旦过充或过放,部分电解液会分解产气,电性能急剧下降,多次产气累积,电池发生气涨,内压过高,壳体会发生爆裂,产生危险。现行办法是在壳体上盖部位设置一应力薄弱点(防爆片),一旦电池内气压升高至一定值,应力薄弱点(防爆片)破裂,避免电池壳体发生大面积爆裂,产生危险但应力薄弱点(防爆片)破裂后,外界含水气体进入电池内部,会使电池很快失效报废。
有人将阀控铅酸电池的安全阀改进后作为锂电池安全阀,但由于锂离子电池电解液具有很强的腐蚀性,安全阀阀芯很快被腐蚀,不是变得不闭阀,就是变得不开阀,整体失效,电池爆裂或报废不可避免。
实用新型内容
本实用新型的目的在于提供一种避免电池气涨爆裂、阻止外界水气进入,使用安全可靠的锂离子电池安全阀。
本实用新型的技术方案是:锂离子电池安全阀的阀体内腔设有锥形阀口和与之配合的钢球,钢球由弹簧和定位件压紧,与锥形阀口的圆锥面接触,阀体内腔的装定位件的端口处设有滤水片。
进一步的方案是:所述滤水片为微孔聚丙烯圆片,孔径0.1~10μm,孔隙率25~70%;所述阀体安装端有外螺纹,阀体外圆台肩处设有密封垫圈;所述定位件与阀体内腔螺纹连接。
本实用新型采用弹簧压紧的钢球作为阀芯,开闭灵活,反应灵敏,不会卡死,安全可靠。当电池内部压力达一定值后,阀芯打开,设置在阀体内腔端口处的滤水片由于合适的孔径和孔隙率,能顺利排出内部气体,避免电池气涨爆裂,而有效阻止外界含水气体进入电池内部,对电池起到保护作用。同时,该安全阀与电池壳体安装方便,密封可靠,进一步提高使用性能。
附图说明
附图为本实用新型结构示意图。
具体实施方式
如图,铝质阀体1的内腔有锥形阀口和与之配合的钢球3,钢球由弹簧4和定位件5压紧,定位件与阀体内腔螺纹连接,压紧力可调,阀体内腔端口处设有滤水片6,该滤水片为微孔聚丙烯圆片,孔径5μm,孔隙率60%,阀体安装端有外螺纹,阀体外圆台肩处设有密封垫圈2。

Claims (4)

1.一种锂离子电池安全阀,其特征是阀体内腔设有锥形阀口和与之配合的钢球,钢球由弹簧和定位件压紧,与锥形阀口的圆锥面接触,阀体内腔的装定位件的端口处设有滤水片。
2.按权利要求1所述锂离子电池安全阀,其特征是所述滤水片为微孔聚丙烯圆片,孔径0.1~10μm,孔隙率25~70%。
3.按权利要求1所述锂离子电池安全阀,其特征是所述阀体安装端有外螺纹,阀体外圆台肩处设有密封垫圈。
4.按权利要求1所述锂离子电池安全阀,其特征是所述定位件与阀体内腔螺纹连接。
CN2010202009154U 2010-05-20 2010-05-20 锂离子电池安全阀 Expired - Fee Related CN201681988U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202009154U CN201681988U (zh) 2010-05-20 2010-05-20 锂离子电池安全阀

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202009154U CN201681988U (zh) 2010-05-20 2010-05-20 锂离子电池安全阀

Publications (1)

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CN201681988U true CN201681988U (zh) 2010-12-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012128890A1 (en) * 2011-03-24 2012-09-27 Lithionics, Llc Battery pack thermal vent protection
CN103105297A (zh) * 2013-01-14 2013-05-15 奇瑞汽车股份有限公司 一种发动机egr率直接测量方法及发动机egr阀

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012128890A1 (en) * 2011-03-24 2012-09-27 Lithionics, Llc Battery pack thermal vent protection
CN103105297A (zh) * 2013-01-14 2013-05-15 奇瑞汽车股份有限公司 一种发动机egr率直接测量方法及发动机egr阀

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Granted publication date: 20101222

Termination date: 20110520