电池2024，Vol.54Issue(6)：793-798,6.DOI:10.19535/j.1001-1579.2024.06.007
化学-热耦合分析电池的内阻和产热
Analysis of internal resistance and heat production of battery by chemical-thermal coupling
摘要
Abstract
Li-ion battery generates a lot of heat during operation,so the study of the battery heat production mechanism and its influence on the internal resistance is significant.The effects of ambient temperature,state of charge(SOC)and cathode material on internal resistance are analyzed by hybrid pulse power characterization(HPPC)tests.An electrothermal coupling model based on lumped battery module is established,the effects of discharge rate and ambient temperature on the surface temperature of the battery are analyzed.With the change of SOC,the resistance shows a trend of high at both ends and flat in the middle.As the ambient temperature increases,the internal resistance of the battery shows a decreasing trend.At SOC of 0.1 and 0.9,the internal resistance at 15℃and 25℃is about 2.0 times and 1.5 times of that at 35℃,respectively.The cathode material is an important factor that causes the significant change of the internal resistance of the battery.The heat production of the battery increases with the increase of discharge rate,the temperature rise is more obvious at low temperature.关键词
内阻/产热/放电倍率/正极材料/化学-热耦合/锂离子电池Key words
internal resistance/heat generation/discharge rate/cathode material/chemical-thermal coupling/Li-ion battery分类
信息技术与安全科学引用本文复制引用
李航,刘晓建,白金,宋亚勤..化学-热耦合分析电池的内阻和产热[J].电池,2024,54(6):793-798,6.基金项目
国家自然科学基金项目(62074125) （62074125）
