China Safety Science Journal ›› 2017, Vol. 27 ›› Issue (11): 18-23.doi: 10.16265/j.cnki.issn1003-3033.2017.11.004

• Safety Science of Engineering and Technology • Previous Articles     Next Articles

Study on lithium-ion batteries' fire characteristics and trace identification technology

ZHANG Yi, WANG Lifen, LYU Zhong, YANG Shiqun, PENG Bo, ZHAO Changzheng   

  1. Sichuan Fire Evidence Identification Center of Fire Department of MPS, Sichuan Fire Research Institute of MPS, CHENGdu Sichuan 610036, China
  • Received:2017-09-07 Revised:2017-10-16 Published:2020-10-21

Abstract: In order to investigate the fire characteristics of lithium-ion battery under different fault conditions, puncturing, external heating, and overvoltage charging experiments were carried out on several common lithium-ion batteries of electric vehicles. Melted marks caused by the battery combustion were investigated as well. The results show in the puncturing and external heating experiments, both temperature rise and toxic gas release level of the ternary materials lithium-ion battery are higher than those of any of both the LiCoO2 lithium-ion battery and the LiFePO4 lithium-ion battery. In the overvoltage charging experiments, the ternary materials lithium-ion battery is easy to give out heat, and its surface temperature increases quickly, showing an obvious fire risk. The heat produced by the battery combustion can melt the iron shell. And the metallographic structures of the melted mark presents the characteristic of arc trace. That the metallographic structures of metal shell grow, presenting an uneven distribution.

Key words: lithium-ion battery, fire characteristic, gas release, metallographic analysis, trace identification

CLC Number: