Haiqing Xiao

Research on Safety of Li-ion Batteries in Crushing Test

The crushing tests are generally performed at room temperature based on actual standards, but in fact, the power battery work in variety of different environment temperatures. Therefore, the crushing tests of the power battery were researched at different environment temperatures (-30℃, 20℃, 40℃ and 65℃). The results showed that the crush can induce the internal short circuit, thermal runaway and even fire and explosion. The other result is that the higher the environment temperature is, the worse the battery thermal stability is. That is to say, the battery is prone to induce thermal runaway when the temperature is high.

Failure Analysis of Power Battery Under High Environment Temperatures in Impact Test

The impact tests of the power battery were performed at 40 and 65 °C environment temperatures. The results showed that the impact and the high environment temperatures can induce the internal short circuit, the heat can accumulate inside the battery, and those accumulated heat can lead to thermal runaway and even battery burning and explosion. The other result is that the higher the environment temperature is, the worse the batterys thermal stability is.