基于simulink的磷酸铁锂动力电池模型仿真研究

Simulation research on model of LiFePO4 Li-ion power battery

电动汽车的电池管理系统设计及电池剩余电量预测依赖于电池等效电路模型,文章基于电动汽车磷酸铁锂动力电池,建立了二阶RC等效电路的simulink模型,并对其进行了美国联邦城市驾驶工况仿真测试。结果表明在一定误差范围内,模型能够较好的模拟电池的充放电特性,可将模型应用于进一步的电池SOC估算方法中。

The design for the power Li-lion battery management system and the prediction of the residual capacity are both rely on the equivalent circuit model of the Li-lion battery, therefore, based on the Li Fe PO4Li-ion power battery for electric vehicle, the simulink model of two order RC equivalent circuit is built and validated by FUDS condition. The result shows thatthe model can simulate charge and discharge process well in certain error range and can be appliedfurtherly to method of SOC estimation.