功率型锂离子动力电池的内阻特性

为了深入分析功率型锂离子电池的内阻特性及影响因素之间的关系，本文利用混合脉冲功率特性测试方法（HybridPulsePowerCharacterization，HPPC）测试锂离子电池在不同温度环境、荷电状态（StageofCharge，SOC）下的内阻变化规律，实验结果表明锂离子电池内阻在低温环境和较低SOC下变化明显．最后利用多项式最小二乘法拟合得到锂离子电池内阻与环境温度之间的关系表达式，为下一步实现电池功率在线预测提供了数据支持和理论基础．

Characteristic on internal resistance of lithium-ion power battery

For in-depth analysis internal resistance of power lithium-ion battery and the relationship between factors, hybrid pulse power characterization（HPPC） method is used for testing internal resistance of lithium-ion battery under the different temperatures and the stage of charge（SO（2） in this paper. The results show that the power lithium-ion internal resistance has changed significantly at low temperature and SOC. Finally, the relationship expression between the power lithium-ion battery internal resistance and the temperature was proposed by polynomial least square curve fitting, it provides a theoretical basis and data support for the battery power online prediction.