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리튬이차전지의 과충전에 의한 열폭주 현상의 이해

Understanding Thermal Runaway Phenomena in Overcharged Lithium-Ion Batteries

이재승|봉성율|이민서|유지선|강경신
한국전기화학회 (The Korean Electrochemical Society)|2024.05|전기화학회지 (Journal of the Korean Electrochemical Society)|제27권 제2호|pp. 55-72|DOI https://doi.org/10.5229/JKES.2024.27.2.55

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키워드

Lithium-ion batteryTemperatureThermal runawayOverchargeState of chargeVoltage
주제분류화학

초록

이차전지는 우리 생활에 있어 지구온난화에 따른 화석연료의 대체원으로서 전기차 및 에너지저장장치(Energy storage system, ESS) 등 필수불가결한 신재생에너지원으로 활용하고 있다. 그러나, 과방전, 고속충방전, 단락 등 여러 원인에 따른 이차전지 내 열폭주 현상으로 인해 배터리 화재 및폭발에 대한 사건사례들이 보고되고 있으며, 각각의 원인에 적합한 해결책을 찾기 위해 많은 노력을기울이고 있다. 특히, 과충전 과정에서 원인으로 추정되는 사례들이 지속적으로 보고되고 있으므로, 본 총설에서는 과충전 과정에서 발생할 수 있는 이차전지의 화학적 반응들을 살펴보고, 이를 점검및 예방하기 위한 위험조사방법에 대해서 이야기하고자 한다.

Abstract

Secondary batteries are used as an essential renewable energy source in our lives, such as electric vehicles and energy storage systems (ESS), as an alternative to fossil fuels due to global warming. However, cases of battery fires and explosions have been reported due to thermal runaway in secondary batteries due to various causes such as overdischarge, high-speed charging and discharging, and external short circuit, and great efforts are being made to find solutions suitable for each cause. In particular, as cases presumed to be caused by the overcharging process have been reported, this review will examine the chemical reactions of secondary batteries that can occur during the overcharging process and discuss risk investigation methods to check and prevent them.

참고문헌 (33)

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