CN2411578Y - 圆柱型锂离子蓄电池防爆盖 - Google Patents

圆柱型锂离子蓄电池防爆盖 Download PDF

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CN2411578Y
CN2411578Y CN 00231517 CN00231517U CN2411578Y CN 2411578 Y CN2411578 Y CN 2411578Y CN 00231517 CN00231517 CN 00231517 CN 00231517 U CN00231517 U CN 00231517U CN 2411578 Y CN2411578 Y CN 2411578Y
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battery
top cover
storage battery
cylindrical lithium
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杨清欣
汪艳
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Electronics Inst No18 Ministry Of Information Industry
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Electronics Inst No18 Ministry Of Information Industry
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Abstract

圆柱型锂离子蓄电池防爆盖属于新型高能圆柱型锂离子蓄电池所用安全控制装置,由密封圈1、安全膜片2、顶盖3、孔板4、铝环5五个零件组成,经热塑成型焊接而成一体。在不影响电池安全性的前提下,去除了普通锂离子蓄电池电池盖上的一个零件(正温度电阻系数);当电池内压达到2.8至4.3兆帕时,电池内大量物质通过顶盖3上3个大泄压孔快速向外排出,确保电池的安全性能。

Description

圆柱型锂离子蓄电池防爆盖
本实用新型属于新型高能圆柱型锂离子蓄电池所用安全控制装置，可应用于系列圆柱型锂离子蓄电池。
目前国际上圆柱型半密封电池用电池盖不仅用作电池正极端子而且对电池的安全性在设计上进行保证，电池盖中都含有一个重要零件：正温度系数电阻，它的作用是，当电池在正常温度下时，该零件的电阻几乎为零；当电池温度升高达到一定值时，该零件的电阻近似为无穷大，从而保护了电池。但当电池内部压力过高，电池实现定向破裂时，由于盖上泄压孔过小或过多(一般有6、5、4个孔)，致使电池内部物质在盖处堵塞，不利于电池快速泄压，而且模具加工复杂。
本实用新型的目的在于避免上述现有技术中的不足之处，通过优化电池安全设计，去除了电池盖中的正温度系数电阻；并在盖上设计了3个大泄压孔，不仅使电池的安全问题防患于未然，而且简化了模具设计，组合盖子时，不易变形，保证了盖子的强度。
本实用新型的目的可以通过以下措施达到，本实用新型由5个零件组成：密封圈1、安全膜片2、顶盖3、孔板4、铝环5。密封圈1是通过精密注塑而成；安全膜片2采用伞型设计，由精密模具冲压而成，严格控制刻痕深度；顶盖3、铝环4、孔板5均由精密模具冲压而成。密封圈1、安全膜片2、顶盖3、铝环4经热塑成型后再与孔板5焊接在一起。
由于上述解决方案结构简单，制造容易，使得该实用新型在圆柱型锂离子蓄电池中不仅能够在起到密封电池、正极端子的作用，更重要的是在滥用条件下起到断路和定向破裂、快速泄压的作用，保证了电池的安全性。
下面结合附图对本实用新型进一步说明：
图1为圆柱型锂离子蓄电池用电池盖的装配图
图2为顶盖零件图
安全膜片2采用伞型结构设计，它的底部区域与孔板4的中心薄层焊接在一起，当电池内部压力逐渐增大时，伞型结构反向，焊点自动断开，切断正极通道；当电池内部压力继续增大时，安全膜片在刻痕处撕裂，电池内大量物质通过顶盖上3个大泄压孔快速定向排出，保证电池不发生爆炸。
本实用新型在电池中起到4个作用：密封电池、正极端子、安全防爆、快速泄压。去除了一个重要零件(正温度系数电阻)和设计了独特的快速泄压孔是这一实用新型的独到之处。该设计可以起到如下的效果：当电池内部压力增大到一定程度时，电池内部大量物质能够快速向外排出，达到泄压目的。

Claims (1)

1.本实用新型由密封圈〔1〕、安全膜片〔2〕、顶盖〔3〕、孔板〔4〕、铝环〔5〕组成，安全膜片〔2〕的伞型底部区域内与孔板〔4〕的中心薄层焊接在一起，其特征是：在不影响电池安全性的前提下，去除了普通锂离子蓄电池电池盖上的一个零件(正温度系数电阻)；顶盖〔3〕上有3个大泄压孔，当电池内部压力超出安全值时，电池内部大量物质通过顶盖上3个大泄压孔快速向外排出，实现快速泄压功能，确保电池的安全性能。
CN 00231517 2000-03-23 2000-03-23 圆柱型锂离子蓄电池防爆盖 Expired - Fee Related CN2411578Y (zh)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008106836A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd , Battery mouth-sealing assembly and battery including the same
WO2008106835A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd An improved battery mouth-sealing assembly and a battery including the same
WO2008106834A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd An improved battery mouth-sealing assembly and a battery including the same
CN101188276B (zh) * 2006-11-16 2010-10-13 深圳市比克电池有限公司 一种电池
CN101931094A (zh) * 2009-06-23 2010-12-29 深圳市比克电池有限公司 一种增强密封性的圆柱形电池制造方法
CN102290542A (zh) * 2011-07-13 2011-12-21 无锡市金杨新型电源有限公司 低电阻锂离子电池盖帽
CN101997095B (zh) * 2009-08-26 2014-09-24 比克国际(天津)有限公司 电池组合盖、电池
CN105118936A (zh) * 2015-09-06 2015-12-02 朱剑 一种动力电池吉欧级防爆防燃烧盖帽

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101188276B (zh) * 2006-11-16 2010-10-13 深圳市比克电池有限公司 一种电池
EP2133937A4 (en) * 2007-03-02 2012-10-10 Shenzhen Bak Battery Co Ltd HERMETIC BATTERY ORIFICE CLOSURE ASSEMBLY AND BATTERY INCLUDING THE SAME
WO2008106834A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd An improved battery mouth-sealing assembly and a battery including the same
EP2133936A1 (en) * 2007-03-02 2009-12-16 Shenzhen Bak Battery Co., Ltd An improved battery mouth-sealing assembly and a battery including the same
EP2133937A1 (en) * 2007-03-02 2009-12-16 Shenzhen Bak Battery Co., Ltd Battery mouth-sealing assembly and battery including the same
WO2008106835A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd An improved battery mouth-sealing assembly and a battery including the same
EP2133936A4 (en) * 2007-03-02 2012-10-10 Shenzhen Bak Battery Co Ltd IMPROVED HERMETIC BATTERY ORIFICE CLOSURE ASSEMBLY AND BATTERY INCLUDING THE SAME
WO2008106836A1 (en) 2007-03-02 2008-09-12 Shenzhen Bak Battery Co., Ltd , Battery mouth-sealing assembly and battery including the same
CN101931094A (zh) * 2009-06-23 2010-12-29 深圳市比克电池有限公司 一种增强密封性的圆柱形电池制造方法
CN101997095B (zh) * 2009-08-26 2014-09-24 比克国际(天津)有限公司 电池组合盖、电池
CN102290542A (zh) * 2011-07-13 2011-12-21 无锡市金杨新型电源有限公司 低电阻锂离子电池盖帽
CN102290542B (zh) * 2011-07-13 2015-09-02 无锡市金杨新型电源有限公司 低电阻锂离子电池盖帽
CN105118936A (zh) * 2015-09-06 2015-12-02 朱剑 一种动力电池吉欧级防爆防燃烧盖帽

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