电动汽车锂电池工作特性等效电路比较研究

Comparative Study of Lithium-Ion Battery Equivalent Circuit Models in Electric Vehicles

分析了锂离子电池的特性和充放电原理,介绍了锂离子的电化学模型、Rint模型、四阶动态模型、PNGV模型、GNL模型以及Thevinin电路模型,分析了各等效电路模型的优缺点,综合分析各种等效电路特点,确定了Thevinin等效电路模型作为电动汽车锂离子电池SOC估算的电池模型的分析方式。

This paper first analyzes the characteristics of Lithium-ion batteries, as well as characteristics of charge and discharge. Then several Lithium-ion battery equivalent circuit models such as the electrochemical, Rint, fourth-order dynamic, PNGV, GNL and Thevinin models are evaluated. Based on a comprehensive analysis of the advantages and disadvantages of each model, in this paper, the Thevinin is considered as a suitable model for SOC estimation of Lithium-ion batteries in electric vehicles.