摘要
质子交换膜燃料电池中温度、湿度会显著影响电池的工作性能。为实时监控电池内的温度响应,本文采用先进MEMS微纳加工技术,成功开发出可用于燃料电池中的微型薄膜热电偶,其厚度大约为7μm,且空间分辨率能达到流场板流道和脊背的尺度。本文将该薄膜热电偶嵌入在流场板和气体扩散层之间,在ARBIN燃料电池测试平台上测试电池的伏安特性曲线,并监测电池温度-电流的变化关系,结果发现薄膜热电偶的热响应速度非常快,可即时测量电池内部的温度,且对工作部件干扰小。测试结果表明,电池内部的电压随着工作电流的增加而降低,而温度随着工作电流的增加而增加。
The temperature and humidity in the proton exchange membrane fuel cell (PEMFC) are extremely important to the working performances of the cell.For real-time monitoring the temperature response in the cell,we developed a micro thin film thermocouple (TFTC) using micro-electro-mechanical systems (MEMS) techniques.The thickness of the TFTC is 7μm and the resolution is smaller than the rib-channel scale.The TFTC array was placed between the flow field plate and gas diffusion layer.The volt-ampere characteristics and the relationship between temperature and current had been tested on the ARBIN fuel cell test platform.It is found that the TFTC can real-time monitor the temperature with the rapid response speed and little disturbance.With the increase of the current,the voltage in the cell decreases and the temperature increases.
作者
唐于晴
丁靖
蔡赛杰
陶文铨
TANG Yu-Qing;DING Jing;CAI Sai-Jie;TAO Wen-Quan(Key Laboratory of Thermo-Fluid Science and Engineering of MOE,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第8期1840-1844,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51836005)
国家重点研发计划课题(No.2017YFB0102702)