18650NCA型单体电池电热特性的实验与仿真研究  

Experimental and simulation research on thermal performance of 18650NCAsingle cell

作　　者：张宇[1] 杨文[1] 陈星[1] 李康群 周飞[1] ZHANG Yu;YANG Wen;CHEN Xing;LI Kangqun;ZHOU Fei(National Key Laboratory of Helicopter Transmission Technology,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China)

机构地区：[1]南京航空航天大学直升机传动技术国家级重点实验室,江苏南京210016

出　　处：《电源技术》2022年第3期289-293,共5页Chinese Journal of Power Sources

摘　　要：针对18650NCA型(正极材料为LiNi_(0.8)Co_(0.1)Al_(0.1)O_(2))锂离子电池的性能进行了系统性研究,通过实验测得在不同温度、不同倍率下电池的温升。使用以上实验数据在COMSOL软件中建立锂离子单体电池模型。最后进行不同工况(ECE、NEDC)和不同环境温度下的充放电实验,记录电池表面温度,再使用搭建的模型在不同动态工况下和不同放电倍率下仿真,将仿真数据与实验数据对比。研究结果表明:在15、25和35℃三种环境温度下,三种恒流工况和两种动态工况下的误差均低于2℃,在恒流工况下误差占温升的占比小于5%,在动态工况下小于10%,可以满足预测精度要求。A systematic study on the performance of the 18650NCA type(the cathode material was LiNi_(0.8)Co_(0.1)Al_(0.1)O_(2))lithium-ion battery was carried out,and the temperature rise of the battery at different temperatures and different magnifications was measured through experiments.The above experimental data was used to build a lithium-ion battery model in COMSOL software.Finally,the charging and discharging experiments under different dynamic conditions(ECE,NEDC)and different discharging rates were carried out,and the surface temperature of the battery was recorded.The simulation results were compared with the experimental data by using the established model under different dynamic conditions and different discharging rates.The results show that under the three ambient temperatures of 15,25 and 35℃,the errors under the three constant current working conditions and the two dynamic working conditions are all lower than 2℃,the proportion of error to temperature rise is less than 5%under constant current condition and less than 10%under dynamic condition,which meet the requirements of prediction accuracy.

关 键 词：锂离子电池 COMSOL仿真 误差分析 

分 类 号：TM912[电气工程—电力电子与电力传动]