LSB(Lithium Secondary Battery) 발화·폭발에 따른 극판 형상 분석 및 평가 연구

The need for safety standards of lithium battery is gradually required, but systematic analysis is still insufficient. There is still an objective and empirical accident analyzing method for batteries after ignition. The explosion pattern is analyzed, through non-destructive analysis (X-ray SEM) and destruction (disassembly) analysis of the battery. The possibility of accident after the ignition is suggested through the experiment of the internal shot and the overcharge representation. If the battery penetrates a part of the battery can with an external impact (nail), battery swells and an internal short circuit between the impact object and the jelly roll (electrode plate) happens. Ignition and explosion patterns by swelling, short-cut and overcharge are analysed and evaluated systematically by experiments. These results can be shared not only by the objective and reasonable analysis method of lithium secondary batteries but also by the fire investigation technique.