基于修正参数的电动汽车SOC估算方法仿真

Simulation on Electric Vehicle SOC Estimation Based on Correction Factors

电动汽车电池管理系统中最为重要的一个指标就是电池荷电状态(SOC)的估算。针对铅蓄电池的反应机理和工作特性,提出了一种带修正参数的安时-开路电压结合法,分析了将电池老化、放电效率以及温度等参数进行修正后对估算结果的影响,在Matlab中建立了SOC估算仿真模型。仿真结果和实验结果对比表明,该方法具有较高精度,可以精确地反映动力电池组使用情况。

One of the most important indicators in electric vehicle battery management system is the state of charge estimation.For the reaction mechanism and working characteristics of lead -acid batteries, Ahopen circuit voltage with correction factors was put forward .Correction factors to the parameters which could affect the battery performance like discharge system , temperature and the aging of the battery were analyzed and the SOC estimation model was constructed in MATLAB .The simulation result and experiments show that the method has a high precision and can reflect the status of battery usage accurately .