原创 单体电池热失控激发实验-概览

上周五同事严博士对单体热失控对周围影响的做个一个系统的介绍，我做了一些整理和记录。

注：这个实验只是对单体电池出现热失控之后整车反应做评估，通过实验方法的论证来确认过程，更多需要借鉴其实验方法和实验控制。

从源头来看，研究EVS的委员会认为，即使很成熟的电池供应商也无法保证所有出厂的电池不会出现热失控，有些原因发生了也很难追溯和记录。就像手机电池炸大腿一样，电动汽车里面的电池组因为能量大，所以危害的评估就至为重要了。

* Thermal runaway reactions can occur with cells or batteries of any chemistry, including lead acid and nickel metal hydride batteries.

* Although rare, thermal runaway reactions do occur in the field, even with batteries produced by the most experienced and conscientious cell and battery manufacturers, and even with batteries that meet applicable standards and routinely pass a variety of abuse tests.

* Some field thermal runaway failures can be ascribed to abuse of the batteries, some to identifiable manufacturing failures, and some failures remain unexplained.

* Thermal runaway reactions with Li-ion cells are of particular concern since cells with this chemistry have a higher energy density than the more familiar automotive battery chemistry types (lead acid or nickel metal hydride), usually contain a flammable electrolyte, and are used to make higher capacity battery packs (RESS) than previously achieved with lead acid or nickel metal hydride chemistries.

整个过程为，小步渐进尝试来确认实际的热失控从小到大，从单个到全局的概览

1）选择一种合适的激发热失控的方法

2）在单体、小量和模块级别测试过程中验证这种热失控的办法

单体激发

模块激发

3）最终在整车实验的情况，运用先前确认的方法来确认情况

今天这篇文章，先做个走马观花做概览，接下来对每种种类的实验细节和可能的一些解释做进一步的阐述，各位读者可以自己看一下。细节我也要找同事学习一下。

参考文件

来源为UNECE Electric Vehicle Safety (EVS) EVS 6th session 上的Single Cell Thermal Runaway Initiation (SCTRI) Test – (Propagation)报告