基于交流阻抗技术的燃料电池状态分析  

Condition analysis of PEMFC based on AC impedance technology

作　　者：刘锋 曾东荣 陈丽丽 王诚[2] LIU Feng;ZENG Dongrong;CHEN Lili;WANG Cheng(Foshan CleanEst Energy Technology Co.,Ltd.,Foshan Guangdong 528000,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]佛山市清极能源科技有限公司,广东佛山528000 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《电源技术》2022年第12期1443-1446,共4页Chinese Journal of Power Sources

基　　金：2019年佛山市科技创新团队(1920001000075)。

摘　　要：质子交换膜燃料电池电堆的输出性能与其内部的水热管理状态密切相关,恒定频率下的交流阻抗值可以用来判断电堆的状态。通过实验验证了电堆阴极湿度和阴极计量比的变化与交流阻抗之间的关系,提出利用300与10 Hz低频阻抗值结合的方法分析电堆状态。本方法可在车用燃料电池系统实现基于交流阻抗值的闭环控制,进而提高发动机的可靠性并延长电堆寿命。The performance of PEMFC is closely related to its internal state of heat and water management.The condition mode of the stack can be identified based on the AC impedance value at constant frequency.The relationship between the change of cathode humidity and cathode metering ratio and AC impedance was verified through experiments.A method combining 300 and 10 Hz low-frequency impedance was proposed to analyze the state of the stack.This method can be used to realize closed-loop control based on AC impedance value for automotive fuel cell system,and thus improves engine reliability and prolonged the stack life.

关 键 词：质子交换膜燃料电池 交流阻抗 状态分析 

分 类 号：TM911.4[电气工程—电力电子与电力传动]