摘要
为研究磷酸铁锂离子电池在泄压阀打开之后,释放的气体在模组中扩散行为,本文基于实际100%SOC磷酸铁锂离子电池模组尺寸建立1∶1几何模型,模拟电池模组内部电池发生热失控、泄压阀打开及释放气体的扩散行为;通过FDS软件对其进行仿真研究,分析磷酸铁锂离子电池在热失控时释放H_(2)、CO、CH4和CO_(2)气体的扩散规律。研究结果表明:磷酸铁锂离子电池在泄压阀打开后,在8 s内气体充满整个电池模组箱内部上侧,在电池模组箱上方内部的温度维持在55℃;在30 s之后,模组箱内气体空间分布逐渐趋于平衡,不随时间的变化而发生变化。在释放的气体中CO_(2)约占30%,在4种气体中占比最大。本文的研究成果可为磷酸铁锂离子电池模组的设计以及气体探测系统的设计提供参考依据。
In order to investigate the diffusion behavior of the released gas in the module after the pressure relief valve is opened,1∶1 geometric model is established based on the actual size of the 100%SOC LiFePO4 battery module.Thermal runaway occurs in the battery inside the module,and the pressure relief valve opens to release gas.The diffusion of H_(2),CO,CH4 and CO_(2) released from lithium-ion battery was analyzed by using Fire Dynamics Simulator software.The results show that after the pressure relief valve of the lithium-ion battery is opened,the gas will be filled to the upper side of the whole battery module in 8 s,and the internal temperature above the battery module box is maintained at 55℃.After 30 s,the gas spatial distribution in the module tends to be balanced and does not change with a lot time.CO_(2) accounts for about 30%of the gases released,the largest of the four types of gas.The research results of this paper provide a reference for the design of lithium-ion battery module and the design of gas monitoring and monitoring system.
作者
王俊
贾壮壮
秦鹏
黄峥
吴静云
戚文
王青松
WANG Jun;JIA Zhuangzhuang;QIN Peng;HUANG Zheng;WU Jingyun;QI Wen;WANG Qingsong(Jiangsu Electric Power Design Consulting Co.Ltd.,Nanjing 210008,Jiangsu,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,Anhui,China;Economic Research Institute of State Grid Jiangsu Electric Power Co.Ltd.,Nanjing 210008,Jiangsu,China)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2022年第1期185-192,共8页
Energy Storage Science and Technology
基金
国网江苏电力设计咨询有限公司科技项目(JE202001)。
关键词
FDS
锂离子电池模组
热失控
产气
仿真
FDS
lithium-ion battery module
thermal runaway
gas vent
simulation
