基于DRT的锂离子电池等效电路预识别  

Pre-Identification of Equivalent Circuit for Lithium-Ion Batteries Based on DRT

作　　者：夏旻磊 闵宇霖 XIA Minlei;MIN Yulin(School of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学环境与化学工程学院,上海200090

出　　处：《上海电力大学学报》2025年第2期140-146,152,共8页Journal of Shanghai University of Electric Power

摘　　要：等效电路模型(ECM)是一种常见的电池建模方法,能够反映电池的化学特性。然而,ECM的选择通常依赖于实验数据和经验判断,导致ECM的泛化能力较差。通过引入弛豫时间分布(DRT)方法,从镍钴铝(NCA)电池的电化学阻抗谱(EIS)中提取特征频率,并建立其与ECM中不同电路元件的对应关系,进而计算出合理的初始参数,为ECM的选型与拟合计算提供理论依据。The equivalent circuit model(ECM)is a common battery modeling method that can reflect the chemical characteristics of the battery.However,the selection of the ECM typically depends on experimental data and empirical judgment,resulting in poor generalization ability of the model and serving as a major source of error in online applications.By introducing the distribution of relaxation times(DRT)method,characteristic frequencies are extracted from the electrochemical impedance spectrum(EIS)of nickel-cobalt-aluminum(NCA)batteries.A corresponding relationship between these frequencies and the various circuit components in the ECM is established,enabling the calculation of reasonable initial parameters,thus providing a theoretical basis for ECM selection and fitting calculations.

关 键 词：电化学阻抗谱 弛豫时间分布 等效电路模型 

分 类 号：TM315[电气工程—电机]