Impedance Spectroscopy and Characteristic Frequency Analysis of the PEMFC Cold Start Process

被引：0
|
作者：
Tao A. [1 ,2 ]
Tao J. [1 ,2 ]
Wei X. [1 ,2 ]
机构：
[1] School of Automotive Studies, Tongji University, Shanghai
[2] Clean Energy Automotive Engineering Center, Tongji University, Shanghai
来源：
Qiche Gongcheng/Automotive Engineering | 2024年 / 46卷 / 02期
关键词：
analytical impedance model; cold start; equivalent circuit model; impedance spectroscopy; PEMFC;
D O I：
10.19562/j.chinasae.qcgc.2024.02.009
中图分类号：
学科分类号：
摘要：
In order to optimize the cold start process of PEMFC，it is essential to provide sufficient feedback data. Common impedance spectroscopy and equivalent circuits cannot provide sufficient and real-time feedback due to long acquisition period. Therefore，the cold start impedance model is developed in COMSOL，and the change of impedance spectroscopy is analyzed in combination with experiments. The characteristic frequencies of 1kHz，50Hz and 1Hz are proposed in the high，medium and low frequency ranges respectively to characterize the cold start process of the fuel cell. The results show the above characteristic frequencies vary significantly in the pre-，mid- and post-cold start phases，with the change in impedance at characteristic frequencies of 1 kHz，50Hz and 1Hz of 0.38，0.31 and 1.47 respectively. It improves the real-time performance of data acquisition while retaining feature information compared to obtaining the full impedance spectroscopy and fitting the equivalent circuit. Therefore，the impedance at the characteristic frequency points can be used to characterize the cold start process ，which provides real-time monitoring for the internal state of the cold start. © 2024 SAE-China. All rights reserved.
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页码：269 / 280
页数：11
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