电源技术2026，Vol.50Issue(3)：545-553,9.DOI:10.3969/j.issn.1002-087X.2026.03.019
面向在线EIS测试的宽频带DC-DC激励源设计
Design of wide-bandwidth DC-DC excitation source for online electrochemical impedance spectroscopy
摘要
Abstract
Online electrochemical impedance spectroscopy(EIS)is essential for the real-time monitor-ing of lithium-ion batteries.EIS techniques based on DC-DC converters facilitate non-destructive and low-cost online impedance measurements.However,current research is constrained by the limited control bandwidth of converters and high-frequency switching losses,making it challenging to achieve impedance measurements at high frequencies(>10 kHz).A hybrid hysteresis control scheme was proposed to address the limitations of controller bandwidth on the perturbation frequency while enabling soft-switching.Based on a piecewise linear approximation model of the DC-DC converter,a systematic analysis of the instantaneous switching loss was first conducted.The distribution of soft and hard switching instantaneous losses of the converter under variable frequency control was com-pared,and then some soft switching strategies were proposed.Experimental results demonstrate that,within a switching frequency range of 1.0-1.8 MHz,the hybrid hysteresis control can output a stable sinusoidal current over a wide frequency range from 0.1-70 000 Hz.Moreover,the proposed strategy achieves a significant efficiency improvement of approximately 4%compared to the traditional soft-switching strategy.关键词
高频EIS/DC-DC变换器/混合型滞环控制/部分软开关/开关损耗Key words
high-frequency EIS/DC-DC converter/hybrid hysteresis control/partial soft-switching/switching loss分类
信息技术与安全科学引用本文复制引用
杨泽琦,张哲,刘渊,姚恒,丁飞..面向在线EIS测试的宽频带DC-DC激励源设计[J].电源技术,2026,50(3):545-553,9.基金项目
国家重点研发计划项目(2024YFB2504900) （2024YFB2504900）
