采用阶跃电流辨识电池参数时电流幅值的确定方法
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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 stepchange 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.
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 stepchange 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.
引文
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[9]胡毅.采样定理的截断误差分析[J].中国科学院研究生院报,2008,25(4):460-466.Hu Yi.Truncated error estimate on sampling theorem[J].Journal of the Graduate School of the Chinese Academy of Sciences,2008,25(4):460-466(in Chinese).
[10]江缉光,刘秀成.电路原理[M].北京:清华大学出版社,2007:448-460.
[11]葛俊,童陆园.过程辨识[M].北京:清华大学出版社,2007:134.
[12]Garnier H,Mensler M,Richard A.Continuous-time model identification from sampled data:Implementation issues and performance evaluation[J].International Journal of Control,2003,76(13):1337-1357.
[13]钱政,贾果欣.误差理论与数据处理[M].北京:科学出版社,2013:7-8.
[2]Blanco C,Sanchez L,Gonzalez M,et al.An equivalent circuit model with variable effective capacity for Li Fe PO4batteries[J].IEEE Transactions on Vehicular Technology,2014,63(8):3592-3599.
[3]He Zhichao,Yang Geng,Lu Languang.A parameter identification method for dynamics of lithium iron phosphate batteries based on step-change current curves and constant current curves[J].Energies,2016,9(6):444-468.
[4]刘光明,欧阳明高,卢兰光,等.锂离子电池内部温度场的传递函数在线估计[J].汽车安全与节能学报,2013,4(1):61-66.Liu Guangming,Ou Yang Minggao,Lu Languang,et al.Online estimation of internal temperature fields of lithium-ion batteries using a transfer function[J].Journal of Automotive Safety and Energy,2013,4(1):61-66(in Chinese).
[5]何志超,杨耕,卢兰光,等.一种动力电池动态特性建模[J].电工技术学报,2016,31(11):194-203.He Zhichao,Yang Geng,Lu Languang,et al.A modeling method for power battery dynamics[J].Transactions of China Electrotechnical Society,2016,31(11):194-203(in Chinese).
[6]刘艳莉,戴胜,程泽,等.基于有限差分扩展卡尔曼滤波的锂离子电池SOC估计[J].电工技术学报,2014,29(1):221-228.Liu Yanli,Dai Sheng,Cheng Ze,et al.Estimation of state of charge of Lithium-ion Battery based on finite difference extended Kalman filter[J].Transactions of China Electrotechnical Society,2014,29(1):221-228(in Chinese).
[7]Chen M,Rincón-Mora G A.Accurate electrical battery model capable of predicting runtime and I-V performance[J].IEEE Transactions on Energy Conversion,2006,21(2):504-511.
[8]Nieto N,Daz L,Gastelurrutia J,et al.Thermal modeling of large format lithium-ion cells[J].Journal of Electrochemical Society,2013,160(2):212-217.
[9]胡毅.采样定理的截断误差分析[J].中国科学院研究生院报,2008,25(4):460-466.Hu Yi.Truncated error estimate on sampling theorem[J].Journal of the Graduate School of the Chinese Academy of Sciences,2008,25(4):460-466(in Chinese).
[10]江缉光,刘秀成.电路原理[M].北京:清华大学出版社,2007:448-460.
[11]葛俊,童陆园.过程辨识[M].北京:清华大学出版社,2007:134.
[12]Garnier H,Mensler M,Richard A.Continuous-time model identification from sampled data:Implementation issues and performance evaluation[J].International Journal of Control,2003,76(13):1337-1357.
[13]钱政,贾果欣.误差理论与数据处理[M].北京:科学出版社,2013:7-8.