18650 리튬이온 배터리의 열남용 조건으로 유도된 열폭주 특성 (Thermal Runaway Characteristics Induced by Heat Abuse Conditions in 18650 Li-ion Batteries)

서지정보

· 발행기관 : 한국정밀공학회
· 수록지 정보 : 한국정밀공학회지 / 40권 / 10호 / 821 ~ 827페이지
· 저자명 : 김정명, 박희성

초록

This study aimed to characterize the mechanism of thermal runaway phenomenon in lithium-ion batteries, which represent secondary cells among energy storage devices. Thermal runaway reaction was induced by heating 18650 cells with 5%, 40%, and 80% state of charge (SOC). We divided the thermal runaway of the battery into three stages and discussed the physical measurements that distinguish each stage. We also provided a visual comparison and thermal image of the characterized exhaust gases in all stages. The state of charge and the amount of heat generated by thermal runaway were proportional, and in the third stage of thermal runaway, where the highest mass transfer occurred, 40% of SOC released gas for 13 seconds and 80% of SOC emitted gas and flame for 3 seconds. In addition, a temperature and voltage measurement method that can predict the thermal runaway phenomenon of a battery is presented.

영어초록

This study aimed to characterize the mechanism of thermal runaway phenomenon in lithium-ion batteries, which represent secondary cells among energy storage devices. Thermal runaway reaction was induced by heating 18650 cells with 5%, 40%, and 80% state of charge (SOC). We divided the thermal runaway of the battery into three stages and discussed the physical measurements that distinguish each stage. We also provided a visual comparison and thermal image of the characterized exhaust gases in all stages. The state of charge and the amount of heat generated by thermal runaway were proportional, and in the third stage of thermal runaway, where the highest mass transfer occurred, 40% of SOC released gas for 13 seconds and 80% of SOC emitted gas and flame for 3 seconds. In addition, a temperature and voltage measurement method that can predict the thermal runaway phenomenon of a battery is presented.

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