电池2017，Vol.47Issue(1)：23-26,4.DOI:10.19535/j.1001-1579.2017.01.007
磷酸铁锂动力锂离子电池穿刺实验
Nail penetration test for lithium iron phosphate power Li-ion battery
摘要
Abstract
In order to evaluate safety problem during internal short circuit of lithium iron phosphate (LiFePO4) power Li-ion battery,temperature on the surface of battery with ceramic cap,open circuit voltage and inrush current were analyzed by the nail penetration test of single and parallel connection battery respectively.No matter what the connection and nailing position were,the monitored temperature on the surface of battery near positive pole ear was higher than one in other places during nail test,which could reach the maximum value of 442.5 ℃,increased rapidly in the early stage and then decreased gradually,the bigger electrolyte concentration caused the greater internal resistance.The smaller nailing contact resistance caused the higher temperature on the surface of battery,then instantaneous charged current of the nailed battery in parallel connection became lager,the maximum value of which could reach 256.0 A.The safety performance of the battery with ceramic cap was improved.关键词
磷酸铁锂(LiFePO4)/动力锂离子电池/穿刺/内短路/涌流Key words
lithium iron phosphate(LiFePO4)/power Li-ion battery/nail penetration/internal short circuit/inrush current分类
信息技术与安全科学引用本文复制引用
金标,周明涛,刘方方,安治文..磷酸铁锂动力锂离子电池穿刺实验[J].电池,2017,47(1):23-26,4.基金项目
广东省青年创新人才类项目(自然科学类)(2015KQNCX190),广东科技学院自然科学类重点科研项目(GKY-2014KYZD-1) （自然科学类）
