摘要
利用自主设计的实验平台,采用加热棒模拟锂电池外部过热场景,分别在95、80、60 kPa的环境压力下对18650型锂电池热失控表面温度和CO体积分数变化进行对比,探究低压双流体细水雾对锂电池热失控的抑制效果。结果表明:低压双流体细水雾可在低雾化压力下产生较小的雾滴粒径,并能有效抑制锂电池热失控与热传播,减少CO生成量;雾化压力为1.2 MPa时产生的细水雾雾滴粒径最小,冷却效果最好。随着环境压力降低,细水雾的抑制效果下降。可考虑使用惰性气体作为雾化气体,增强灭火效果。
Using the self-designed experimental platform, simulating the external overheating scene of lithium battery with heating rod, the surface temperature and CO volume fraction of thermal runway of 18650 Lithium battery were compared under 95, 80 and60 kPa respectively. The inhibitory effect of low-pressure twin-fluid water mist on the thermal runaway of Lithium batteries was researched. The results showed that low-pressure twin-fluid water mist can produce smaller droplet at low atomization pressure,which can effectively inhibit thermal runaway and heat propagation of Lithium batteries, and reduce CO production. The fine water mist of 1.2 MPa produces the smallest droplet and the best cooling effect. As the environmental pressure decreases, the effect of the suppression of water mist declines. Inert gas can be considered as atomizing gas to enhance the fire extinguishing effect.
作者
贺元骅
郭君
王海斌
沈俊杰
HE Yuan-hua;GUO Jun;WANG Hai-bin;SHEN Jun-jie(Civil Aviation Flight University of China,Sichuan Guanghan 618307,China)
出处
《消防科学与技术》
CAS
北大核心
2020年第2期223-227,共5页
Fire Science and Technology
基金
国家重点研发计划项目(2018YFC0809500)
国家自然科学基金项目(U1633203)
中国民航飞行学院大学生创新创业项目(S201910624238)。
关键词
锂离子电池
热失控
低压双流体细水雾
雾滴粒径
抑制效果
Lithium-ion battery
thermal runaway
low pressure twin-fluid water mist
droplet particle size
suppression effect
