储能科学与技术2019，Vol.8Issue(3)：559-566,8.DOI:10.12028/j.issn.2095-4239.2019.0006
圆柱型磷酸铁锂电池针刺热失控实验研究
Experimental researches on thermal runaway in cylindrical LiFePO4 batteries during nail penetration
摘要
Abstract
Internal short circuit would be triggered when lithium ion batteries in nail penetration, it will generating massive heat and smokes and may cause thermal runaway damage. In this paper, the internal structure and thermogenesis mechanism of cylindrical LiFePO4 battery after nail penetration are analyzed. An experimental platform for nail penetration test is established, Φ5 mm tungsten steel needle is used to penetrate the battery at initial ambient temperature 20 ℃. The battery thermal runaway process, battery voltage changes, battery surface temperature changes and so on are investigated. According to the experimental results, the following conclusions are obtained: (1) Intensity of thermal runaway about cylindrical LiFePO4 batteries during nail penetration is random. (2) The battery voltage would drop to 0 V after battery penetrated, and will drop more rapidly if the battery sprays smoke and explodes. (3) The temperature of the battery will rise rapidly after nail penetration, and it will rise faster and higher as the battery belches smoke or explodes. The damage of nail penetration to the lithium iron battery is devastating and causes thermal runaway. Therefore, the battery structure should be designed to prevent nail penetration and provide extra protection.关键词
磷酸铁锂电池/针刺/内部短路/热失控Key words
LiFePO4 battery/nail penetration/internal short circuit/thermal runaway分类
资源环境引用本文复制引用
李宇,杜建华,杨世治,张萌启,涂然,张认成,毕坤..圆柱型磷酸铁锂电池针刺热失控实验研究[J].储能科学与技术,2019,8(3):559-566,8.基金项目
福建省科技计划引导性项目(2017Y0064) （2017Y0064）
泉州市科技计划项目(2018Z007) （2018Z007）
华侨大学博士启动项目(15BS311) （15BS311）
华侨大学中青年教师科研提升资助计划项目(ZQN-PY403) （ZQN-PY403）
福建省高校重点实验室开放课题(2018XKA011) （2018XKA011）
