三元软包装锂离子电池热特性实验  

An experiment on thermal characteristics of ternary pouch Li-ion battery

作　　者：王明强 许淘淘 畅志远 孙国华 WANG Ming-qiang;XU Tao-tao;CHANG Zhi-yuan;SUN Guo-hua(China Aviation Lithium Battery(Luoyang)Co.,Ltd.,Luoyang,Henan 471003,China)

机构地区：[1]中航锂电(洛阳)有限公司,河南洛阳471003

出　　处：《电池》2020年第5期475-479,共5页Battery Bimonthly

基　　金：国家重点开发计划(2017YFB0102005)。

摘　　要：以24 Ah、3.65 V三元软包装锂离子动力电池为研究对象,对电池单体不同工况充放电热特性、电池模块散热方案及基于液体的电池包热管理系统进行研究。随着充放电倍率增大和环境温度的降低,电池发热功率增大,温升显著增加;电池模块散热设计中,采用电池侧边散热的质量轻、成本低,相比于采用大面散热,充放电温升和纯冷却温差分别降低2.1℃和0.5℃;采用液体热管理的电池包具有良好的热特性,-20℃低温加热,温差为7.9℃,温升速率为0.52℃/min,40℃下1.5 C快充,最高温度为47.9℃,最大温差为3.9℃。The battery thermal characteristics,module heat dissipation scheme and liquid-based battery pack thermal management system of the ternary pouch Li-ion battery with rated capacity of 24 Ah and voltage of 3.65 V were studied experimentally.The battery heating power and temperature rose significantly with the increasing of charge-discharge rate and reduction of environment temperature.The charge-discharge temperature-rise and cooling temperature difference respectively decreased by 2.1℃and 0.5℃in scheme two which used lighter and cheaper side heat dissipation compared with scheme one with large side heat dissipation.The ternary pouch battery pack with liquid-cooling thermal management had good thermal characteristics.When the battery pack heated at-20℃,the temperature difference was 7.9℃,soft pouch the temperature rise rate was 0.52℃/min.When the battery pack charged by 1.5 C at 40℃,the maximum temperature was 47.9℃,the maximum temperature difference was 3.9℃.

关 键 词：电动车辆 三元软包装锂离子电池 热特性 热管理 

分 类 号：TM912.9[电气工程—电力电子与电力传动]