空冷型PEMFC电堆的单电池特性研究

谭凯峰; 陈维荣; 韩 明; 张雪霞

doi:10.13208/j.electrochem.180852

电化学 >

2018 , Vol. 24 >Issue 6: 766 - 771

DOI: https://doi.org/10.13208/j.electrochem.180852

庆祝衣宝廉院士八十华诞专辑

空冷型PEMFC电堆的单电池特性研究

谭凯峰 ,
陈维荣 ,
韩明 ,
张雪霞

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1. 西南交通大学电气工程学院，四川成都610031； 2. 淡马锡理工学院清洁能源研究中心，新加坡 529757

收稿日期: 2018-09-21

修回日期: 2018-10-17

网络出版日期: 2018-11-02

基金资助

新加坡淡马锡理工学院研究基金和国家自然学科基金渊青年基金冤（No. 51607149）资助

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Voltage Distribution of Self-Humidifying Air-Cooled PEMFC

TAN Kai-feng ,
CHEN Wei-rong ,
HAN Ming ,
ZHANG Xue-xia

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1. School of Electrical Engineering, Southwest Jiaotong University，Chengdu 610031, China; 2. Clean Energy Research Center, Temasek Polytechnic, Singapore 529757, Singapore

Received date: 2018-09-21

Revised date: 2018-10-17

Online published: 2018-11-02

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摘要

本文对实验室自制的自增湿空冷型PEMFC电堆进行了自适应特性研究，并分析了各单电池的性能以及各电池的电压分布情况. 实验中设定操作条件为：阳极工作压力为2 bar，阴极风扇功率0.3 W，氢气室每隔10 s排水1 s. 从实验结果可以看出，空冷型PEMFC的电压分布与负载电流的大小具有一定的联系，大电流负载下电池的电压分布会出现明显的不均匀现象，根据分析结果可以看出，电堆的单体电压波动率与负载电流之间存在近似的指数关系分布，且各单片电池间内阻的差异与大电流下过高的电堆温度都会造成电压分布不均匀的现象.

关键词： 空冷型PEMFC; 电流密度-电压特征曲线; 电压分布

本文引用格式

谭凯峰 , 陈维荣 , 韩明 , 张雪霞 . 空冷型PEMFC电堆的单电池特性研究[J]. 电化学, 2018 , 24(6) : 766 -771 . DOI: 10.13208/j.electrochem.180852

Abstract

In this work, the self-adaptive characteristics of self-humidifying air-cooled PEMFC stack was investigated. The performance and the unit-cell voltage distribution of the stack were measured and analyzed through the unit-cell I-V curve fitting. The operating conditions for this experimental study were set as follows: hydrogen pressure at the anode was 2 bar, the fan power used for the reactant oxygen feed and stack cooling was at 0.3 W, and the duration and time gap of water purged from hydrogen chamber were 1 s and 10 s, respectively. The experimental results showed that the self-humidifying air-cooled PEMFC stack used for this work could be in stable operation with a certain fan power, e.g., 0.3 W, at self-adaptive mode without the requirement of external control circuit. The unit voltage distribution of the air-cooled PEMFC stack was highly affected by the load current. Under the operation with higher current density, the unit-cell voltage distribution of the stack was less uniform due to the difference in the internal resistance of the unit-cells and the excessive temperature existed in the stack. Based on the data analyses, an approximate exponential relationship was found between the voltage fluctuation rate and the load current density.

Key words： air cooled PEMFC; I-V curve; voltage distribution

参考文献

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