基于电化学阻抗谱的新能源汽车动力电池荷电状态在线估算方法研究

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中图分类号：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

随着新能源汽车产业的快速发展，汽车行业对动力电池管理系统的要求越来越高，准确掌握电池的荷电状态（SOC）是提高电池使用效率、延长使用寿命的关键。（剩余3979字）