重庆理工大学学报（自然科学版）2025，Vol.39Issue(3)：220-226,7.DOI:10.3969/j.issn.1674-8425(z).2025.02.027
大容量磷酸铁锂电池热失控特性实验研究
Experimental study on the thermal runaway characteristics of large-capacity lithium-iron phosphate batteries
摘要
Abstract
To study the thermal runaway risk of large-capacity lithium-iron phosphate batteries,we take the 86Ah prismatic lithium-iron phosphate battery for energy storage as the research object and investigate the thermal runaway characteristics of large-capacity lithium-ion batteries with different states of charge(SOC)through a self-built thermal runaway experimental platform.Our results show the larger SOC leads to more active internal chemical reaction of the battery during thermal runaway,more intense thermal runaway,and more mass loss.SOC of the battery increases from 25％to 100％,the safety valve opening time reduces by 19％,and the thermal runaway trigger time is down by 53.1％.The SOC of a lithium-ion phosphate battery is directly proportional to the temperature at the time of thermal runaway.With the increase of battery SOC,the voltage fluctuation decreases and the rapid drop of battery voltage comes earlier,allowing the voltage changes to send earlier warnings to the thermal runaway.关键词
磷酸铁锂电池/热失控/热滥用/荷电状态Key words
lithium-iron phosphate battery/thermal runaway/heat abuse/state of charge分类
安全科学引用本文复制引用
袁树杰,申来雨..大容量磷酸铁锂电池热失控特性实验研究[J].重庆理工大学学报（自然科学版）,2025,39(3):220-226,7.基金项目
安徽理工大学研究生创新基金项目(2021CX2018) （2021CX2018）
