阅读说明：本技术 一种可提升锂离子电池安全性能的软连接片 (Soft connecting sheet capable of improving safety performance of lithium ion battery ) 是由 李缜 张沿江 王启岁 汪涛 吴洋洋 娄帅帅 于 2020-11-20 设计创作，主要内容包括：本发明提供了一种可提升锂离子电池安全性能的软连接片,所述软连接片沿电流路径的两端分别为极耳连接端、电池盖板连接端,中间设置含有导电金属层结构的保护区；所述保护区为多层结构,包括依序设置的基层、网格化金属层和PTC层；基层、网格化金属层与极耳连接端和电池盖板连接端导通；网格化金属层包括多个金属片,各金属片之间通过接触点导通从而形成网格化金属层。在电池发生短路等大电流条件下,表面网格化金属层接触点会迅速熔断,形成“孤岛效应”,从而使得连接片电流中断,起到断路的作用,另外网格化金属层表面镀有对温度敏感的PTC材料,当短路时极耳温度过高会触发连接片内阻迅速增大,起到缓慢释放热量的功能,形成双重保护。(The invention provides a soft connecting sheet capable of improving the safety performance of a lithium ion battery, wherein the two ends of the soft connecting sheet along a current path are respectively a tab connecting end and a battery cover plate connecting end, and a protection area containing a conductive metal layer structure is arranged in the middle of the soft connecting sheet; the protection area is of a multilayer structure and comprises a base layer, a gridding metal layer and a PTC layer which are sequentially arranged; the base layer and the gridding metal layer are communicated with the tab connecting end and the battery cover plate connecting end; the grid metal layer comprises a plurality of metal sheets, and the metal sheets are conducted through contact points to form the grid metal layer. Under the heavy current conditions such as the battery takes place the short circuit, the surperficial grid metal level contact point can fuse rapidly, forms "island effect" to make connection piece current interrupt, play the effect that opens circuit, grid metal level surface plates the PTC material sensitive to temperature in addition, and utmost point ear high temperature can trigger the connection piece internal resistance and increases rapidly when the short circuit, plays the thermal function of slow release, forms duplicate protection.)

技术领域

本发明涉及一种锂离子电池软连接片，属于电池结构件技术领域。

背景技术

在锂离子电池生产和使用过程中，安全性能越来越受到重视，电池的安全性能不仅影响消费者的人身安全，它同样影响一个企业的生存和发展，通常会在生产过程中对电池本身影响较大的粉尘、毛刺和水分进行控制，但电池在发生短路时，会在瞬间释放出巨大的能量，然后电池会发生着火甚至是爆炸，严重影响人身安全。那么如何避免或者减缓这种瞬间释放的能量，提升电池安全性能则是需要电池企业研究的重点课题。