锂离子电池火灾实验及残留物热重分析

Fire test of lithium-ion battery and residue TG analysis

对常用18650型三元锂离子电池进行过充、外短路、针刺实验,重点对三种实验后的正极残留物进行热重实验分析,得到电池表面温度数据,并对其正极残留物热重分析数据进行研究。结果表明,过充电对电池的破坏程度最大,火灾危险性也最大,针刺、外部短路在小范围内仅引起电池表面的升温。

The experiments of 18650 lithium-ion batteries at three abuse state-overcharge, short circuit, acupuncture- are carried out, and the surface temperature are captured. Mean- while, the positive pole residues are particularly analyzed with TG results, the results showed that overcharge can severely de- stroy battery, with high fire risk, while short circuit and acu- puncture make the surface temperature rise.