基于電化學阻抗譜的新能源汽車動力電池荷電狀態(tài)在線估算方法研究

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中圖分類號：U469.7 收稿日期：2025-07-03 DOI：10.19999/j.cnki.1004-0226.2025.08.011

Research on Online Estimation Method of State of Charge for New Energy Vehicle Power Batteries Based on Electrochemical Impedance Spectroscopy

Pan Haijun Guizhou Technical College of Mechanics and Electrics，Duyun 558ooo，China

Abstract：WiththevigorousdevelopmentofChina'snewenergyvehicleindustry，theindustry'srequirementsforbaterymanagementsystemsareincreasing.TraditionalbatterySOCestimationmethodshavecertaindficiencies，whiletheestimationmethodbased onelectrochemical impedancespectroscopy（EIS）hasadvantagessuchashighacuracyandonline monitoring.ThispaperfistelucidatestheimportanceofSOCestimationforewenergyvhiclepowerbateries，ntroducs theconceptandcharacteristicsofelectro chemical impedance spectroscopy，andthenfocusesontheonline estimation methodofSOCfornewenergyvehiclepowerbateries basedon EIS，providing strong support for the optimizationof battry management systems for new energy vehicles.

Keywords：New energy vehicles;Power batteries;State of charge estimation

1前言

隨著新能源汽車產(chǎn)業(yè)的快速發(fā)展，汽車行業(yè)對動力電池管理系統(tǒng)的要求越來越高，準確掌握電池的荷電狀態(tài)（SOC）是提高電池使用效率、延長使用壽命的關(guān)鍵。（剩余3979字）