全氟己酮和细水雾抑制三元锂离子电池火灾有效性研究

锂离子电池热失控是造成电动汽车火灾事故的首要因素。文章概述了车用锂离子电池热失控火灾危险性及抑制方法，并开展了全氟己酮、细水雾对车用三元锂离子电池热失控火灾的灭火试验。结果表明，三元锂离子电池热失控时表面最高温度超过500℃，表面最大升温速率达到18.93℃/s；全氟己酮灭火剂和细水雾均能有效扑灭电池初期明火，但在灭火后数分钟内电池发生复燃。两种灭火剂均能有效降低电池表面最高温度和最大升温速率。

Study on the effectiveness of C6F12O and water mist in suppressing thermal runaway fire of NCM lithium-ion battery

Thermal runaway of lithium-ion battery is the primary factor causing electric vehicle fire accidents. In this paper, the risk of thermal runaway fire of automotive Lithium-ion battery and its suppression and extinguishing methods are summarized, and the fire extinguishing experiments of C6F12O and water mist on thermal runaway fire of ternary lithium-ion battery are carried out. The results show that the maximum surface temperature exceeds 500 ℃ and the maximum surface temperature rise rate reaches 18.93 ℃/s when the ternary lithium battery is thermally out of control; Both C6F12O and water mist can effectively extinguish the initial open fire of the battery, but the battery reignited within a few minutes after the fire was extinguished. The two extinguishing agents can effectively reduce the maximum surface temperature and the maximum heating rate of the battery.