Review of research progress on the battery thermal runaway induced by nail penetration
Nail penetration test is one of the most important meth-ods to investigate the failure mechanisms and thermal runaway features of lithium-ion batteries.This paper summarizes the nail penetration testing methods commonly used by researchers and studies the influence of different variables,including penetration depth,velocity,location,needle material and diameter,on the short-circuiting and thermal runaway behaviour in batteries under nail penetration-induced damage.The results reveal a direct pro-portionality between the depth of nail penetration and the severity of thermal runaway behaviour in batteries.The speed of nail pen-etration has no significant impact on thermal runaway.When nail penetration occurs in regions with dense active materials or near the electrode,the thermal runaway in batteries becomes severer.As for the variables related to the nail itself,such as material and diameter,they exhibit a dual effect on thermal runaway behaviour in batteries,requiring separate analysis of heat generation and dis-sipation considering the actual conditions.Finally,by summariz-ing the influence of various factors on thermal runaway in batter-ies,new insights are proposed to mitigate lithium-ion battery ther-mal runaway and update safety testing procedures,which can pro-vide guidance for subsequent innovative research work.
lithium-ion batterynail penetration testthermal run-awayinternal short circuitbattery safety
万方数据
维普
