动力电池SOC估算方法的实时工况对比研究

Comparative study of the Power Batteries on Real-time Conditions of SOC Estimation Methods

随着燃料电池混合动力汽车的普及,三元锂电池的荷电状态(SOC)估算应用是电池管理系统的重要研究方向,直接决定燃料电池混合动力系统的续航里程。为进一步了解和探索SOC估算方法的准确性,本文基于电池物理模型,通过安时积分法(AH)和内阻法SOC与实际路况SOC的对比分析,研究结果表明:内阻法SOC估算方法能够更符合实际车辆运营SOC的变化情况。

With the popularity of fuel cell hybrid vehicles,state of charge(SOC)estimation of ternary lithium batteries is an important research directions for battery management systems,which directly determines the mileage of fuel cell hybrid power systems.In order to further understand and explore the accuracy of SOC estimation method,this paper,based on the battery physical model,compared the SOC of AH method with internal resistance method under the SOC of actual road condition.The result shows that the SOC estimation method of internal resistance method can better meet the changes of SOC in actual vehicles operation.