摘要
以21700型三元动力锂离子电池为研究对象,在过热、针刺与撞击3种滥用条件下开展热失控试验。分析试验过程中电池温度与电压等关键参数的变化,探究不同极端条件下锂离子电池热失控特性,并分析其破坏机理。结果表明:该品牌21700锂离子电池在3种滥用条件下均被引发热失控并起火燃烧;同时不同滥用条件下电池热失控特性存在较大差异;根据热失控高温危险性由强到弱排序依次为:过热>针刺>撞击。然而在热失控喷射阶段,机械滥用条件下释放的能量要高于热滥用热失控。机械滥用条件下热失控响应时间极快,使得应急反应时间缩短。
The 21700-type ternary lithium-ion batteries were chosen as test subject,the test of thermal runaway was carried under different abuse conditions.To explore the changes in thermal runaway characteristics of batteries under different extreme conditions and analysis its destruction mechanism,the key parameters(surface temperature and open-circuit voltage)were compared and analyzed during the test.Test results show that:the 21700 lithium-ion battery was triggered thermal runaway and burst into flames under the three abuse conditions.Meanwhile,the three abuse conditions,and sorted by the high temperature risk in descending order:overheating>nail penetration>impact.However,at thermal runaway injection stage,the energy released under mechanical abuse condition is higher than that under the heat abuse condition.The response time of thermal runaway is much faster under the condition of mechanical abuse,which make the emergency response time shortened.
作者
郭君
王海斌
贺元骅
Guo Jun;Wang Haibin;He Yuanhua(College of Civil Aviation Safety Engineering,Civil Aviation Flight University of China,Deyang Sichuan 618307,China)
出处
《科技通报》
2021年第4期123-127,共5页
Bulletin of Science and Technology
基金
国家重点研发计划(2018YFC0809500)
国家自然科学基金项目(U1633203)
关键词
锂离子电池
热失控
滥用条件
过热
针刺
撞击
Lithium-ion battery
thermal runaway
abuse condition
overheating
nail penetration
impact
作者简介
郭君(1994-),男,山西省人,在读硕士研究生,主要研究方向为锂电池安全防护。E-mail:guojun802321@163.com;通信作者:贺元骅(1965-),男,四川德阳人,教授,硕士,主要从事消防理论技术、民用飞机灭火系统研究。E-mail:1445430865@qq.com。
