不同灭火剂对18650锂离子电池热失控抑制的对比研究。
A comparative study on the thermal runaway inhibition of 18650 lithium-ion batteries by different fire extinguishing agents.
作者信息
Zhao Junchao, Xue Feng, Fu Yangyang, Cheng Yuan, Yang Hui, Lu Song
机构信息
State Key Laboratory of Fire Science, University of Science of Technology of China, Hefei, Anhui, 230026, P.R.China.
出版信息
iScience. 2021 Jul 10;24(8):102854. doi: 10.1016/j.isci.2021.102854. eCollection 2021 Aug 20.
Safety issue of lithium-ion batteries (LIBs) is always a concern. We have studied the inhabitation on thermal runaway (TR) and propagation of 18,650 LIBs in an enclosed space systematically. LIBs at 70% state of charge are chosen for testing. Four fire extinguishing agents are applied on LIB arrays for 20 s, and the inhibiting effects are different. The cooling efficiency varies with the surface temperatures of LIBs. Water spray has the highest cooling efficiency and inhibits the TR propagation among LIB arrays successfully. Three LIBs undergo TR for the releasing of ABC ultrafine dry powder. BC ultrafine dry powder and Novec 1230 are failed to inhibit the TR propagation. Nevertheless, Novec 1230 shows the best on inhibiting fire occurring and the generation of toxic gas. Generally, this study provides valuable information for the choice of fire extinguishing agents.
锂离子电池（LIBs）的安全问题一直备受关注。我们系统地研究了18650型锂离子电池在封闭空间内热失控（TR）及热传播的抑制情况。选择充电状态为70%的锂离子电池进行测试。将四种灭火剂作用于锂离子电池阵列20秒，其抑制效果各不相同。冷却效率随锂离子电池的表面温度而变化。喷水具有最高的冷却效率，并成功抑制了锂离子电池阵列间的热传播。有三个锂离子电池因释放ABC超细干粉而发生热失控。BC超细干粉和 Novec 1230未能抑制热传播。然而，Novec 1230在抑制火灾发生和有毒气体生成方面表现最佳。总体而言，本研究为灭火剂的选择提供了有价值的信息。
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