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基于Simulink的等效电路参数辨识研究

更新时间:2020-10-26 05:07:08 大小:1M 上传用户:zhengdai查看TA发布的资源 标签:simulink等效电路 下载积分:1分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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动力电池参数辨识是电池测试工作中的重要一环,由于电池内部化学反应复杂,电化学模型和经验模型都无法满足工业测试需求。本文采用RC等效电路建立电池模型,在Simulink平台上搭建电池仿真系统,使用工业测试的脉冲放电数据做训练集和测试集,利用非线性最小二乘法和LM最优化算法估算动力电池的参数。实验结果表明,利用并行计算工具可以提高约34%的计算效率,仿真数据与实验数据均方误差为5.33066×10^-3,非线性最小二乘法比Gradient Descent算法更适用于电池参数辨识,模型精度高,该模型可以用于动力电池的测试与开发。

Power battery parameter identification is an important part of battery testing.Due to the complex internal chemical reaction of the battery,electrochemical models and empirical models cannot meet the industrial testing requirements.In this paper,the RC equivalent circuit is used to build the battery model.The battery simulation system is built on the Simulink platform.The industrial test pulse discharge data is used as the training set and test set.The nonlinear least squares method and the LM optimization algorithm are used to estimate the parameters of the power battery.The experimental results show that the parallel computing tool can improve the computing efficiency by about 34%,and the mean square error of simulation data and experimental data is 5.33066×10^-3.The nonlinear least square method is more suitable for the identification of battery parameters than the Gradient Descent algorithm,and the model accuracy is high.The model can be used for the test and development of power battery.

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