采用阶跃电流辨识电池参数时电流幅值的确定方法  

A Method of Determining Current Amplitude for Battery Parameter Identification Using Step-change Current

作　　者：翟燕飞[1] 何志超[2] 杨耕[2] 孙孝峰[1] 刘旭[2] 

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004 [2]清华大学自动化系,北京100084

出　　处：《电源学报》2017年第2期135-141,共7页Journal of Power Supply

基　　金：国家高技术发展研究计划(863计划)资助项目(2012AA050217);国家自然科学基金资助项目(U1510208;61273045;51361135705);国家重点研发计划资助项目(2016YFB0900302)~~

摘　　要：利用阶跃电流激励辨识动力电池动态特性模型参数时,其幅值将影响模型参数的辨识精度。针对这个问题,对这种动力电池动态特性模型参数辨识方法进行误差分析,提出了阶跃电流信号幅值的确定方法。该方法综合考虑了电池非线性特性和检测装置测量误差对参数辨识精度的影响,确定了参数相对误差与阶跃电流信号幅值之间的函数表达式,并且给出了幅值的确定流程。分析和实验验证了该方法的有效性。The identification precision of model parameters would be affected by the amplitude of signal by using step-change current to identify battery parameters. In this paper, Error analysis of this parameter identification method applied in battery dynamic models is carried out to address this issue. And a method to determine the amplitude of step - change current is proposed. Battery nonlinear characteristics and measure error caused by the detection devices are considered to identify the function between the relative error of parameters and the amplitude of step-change current. The amplitude determination procedure is given in this paper. Analysis and experiments verify the feasibility the proposed method.

关 键 词：动态特性模型 阶跃电流信号幅值 参数辨识精度 电池非线性特性 测量误差 

分 类 号：TM912[电气工程—电力电子与电力传动]