阀控式铅酸蓄电池的等效电路模型和参数辨识

摘要

电池模型是研究电池性能的重要工具,根据阀控式铅酸蓄电池的特性,建立一种能反应其内部特性的二阶RC电路等效模型.然后根据模型,推导出能够反映出电池性能的开路电压和内阻.设计伪随机序列作为模型激励,对铅酸电池在特定条件下的充放电实验进行模拟,利用基于遗忘因子的最小递推二乘法进行模型参数辨识.通过端电压比较法对辨识结果进行验证,结果表明:采用M序列作为激励的参数辨识方法,能够准确有效地辨识阀控式铅酸电池等效电路模型的参数,并可以对其参数的获取提供理论基础与支持.二阶等效电路模型及基于递推最小二乘算法的模型参数的辨识结果可以精确地进行充放电过程仿真.%Battery model is an important tool to study the cell performance.A second-order reaction of its internal characteristics RC circuit equivalent model was built according to VRLA features.Based on the model,the open circuit voltage and internal resistance of battery could be derived.The pseudo-random sequence was designed as a model incentive,lead-acid battery charge and discharge under certain conditions was simulated,and the recursive least-square parameters based on forgetting factor could be identified.By comparing the terminal voltages,the identification results can be verified,and the results show that:M sequence as parameter identification incentives,can accurately and effectively identify the parameters of equivalent circuit model of VRLA battery,and can provide theoretical basis and support for the parameter acquisition.Second-order equivalent circuit model and recursive least squares algorithm based on the recognition result of the model parameters can accurately simulate the charging and discharging process.