液氮抑制锂离子电池热失控传播的实验研究

Experimental study on liquid nitrogen inhibition of uncontrolledheat transmission in lithium ion batteries

该研究旨在探究电池间距对锂离子电池热失控传播的影响,并确定无法引发电池热失控的最小电池间距,同时研究不同液氮喷射方式对热失控传播的阻断效果。实验结果表明,电池间距对热失控的传播有显著影响。当间距达到4 mm时,热失控基本无法传播。各种液氮喷射方式都能有效阻断热失控传播,但直接喷射热失控电池是最理想的方法。

The aim of this study is to investigate the effect of cell spacing on the propagation of thermal runaway in lithium ion batteries and determine the cell spacing that cannot trigger thermal runaway in batteries,and investigate the blocking effect of different liquid nitrogen injection methods on the propagation of thermal runaway.The experimental results show that the cell spacing has a significant effect on the propagation of thermal runaway,and when the spacing reaches 4 mm,thermal runaway is basically unable to propagate.Various liquid nitrogen injection methods can effectively block thermal runaway propagation,but direct injection of thermal runaway cells for cooling is the most ideal method.