摘要
空冷型质子交换燃料电池具有冷启动速度快、效率高的优点,因此被广泛应用于中小功率燃料电池的设计中。空冷型质子交换膜燃料电池结构简单,其附属风扇既负责供氧又负责散热,因此风扇风速对燃料电池性能有较大影响。利用简化的Randles等效电路模型和电流断路法测出了不同风速下燃料电池的阻抗谱,并对实验结果进行了分析和讨论。该方法对比传统方法时效性更好,可以测量瞬时阻抗谱,测量所需时间短,并且不需要昂贵的设备。最终的实验结果表明,风速过高会导致交换膜水淹,另一方面风速过低会导致供氧不足,因此合适的风速使燃料电池性能更好。
The air breath proton exchange membrane fuel cell takes the advantage of high starting speed and high efficiency, so it is wildly used in medium and small-power fuel cell. The structure of the air breath proton exchange membrane fuel cell is simple, which includes an accessary fan to breathe and cool the fuel cell. Therefor, the wind speed of the fan has a great impact on fuel cell performance. The electrochemical impedance spectroscope （EIS） of fuel cell under different wind speed was measured by the combing use of simplified Randles model and current interrupt method, and the analysis of the experimental results were carried out too. Compared with the traditional method, this method has a better timeliness that it can measure the instantaneous impedance spectroscopy, this method also takes less time and do not need expensive equipment. The experimental result shows that high wind speed led to membrane flooding, on the other hand, low wind speed led to oxygen shortage. As a result, a proper wind speed makes the fuel cell perform better.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第29期87-93,I0013,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51177138)
高等学校博士学科点专项科研基金(20100184110015)
中央高校基本科研业务费专项资金(SWJTU11CX030)~~
关键词
燃料电池
交流阻抗谱
电流断路法
fuel cell
electrochemical impedancespectroscope （EIS）
current interrupt method
