质子交换膜燃料电池系统阳极排放技术研究

Research on Anode Emission Technology of Proton Exchange Membrane Fuel Cell System

针对燃料电池系统气-水分离器自身结构特点以及目前常用的电流积分排水策略存在不能准确判断分离器的水位及系统排水策略控制精度低、可靠性差等问题,在气-水分离器上集成液位传感器,将燃料电池系统排水阀复杂的算法控制转换为简单的开关控制。经试验验证,系统在排水过程中阳极压力波动范围较小、电堆输出性能稳定、氢气损耗低,该燃料电池系统气-水分离器及其排水阀间歇性排放策略优化方法是有效的,有助于燃料电池汽车的进一步推广使用。

Aiming at the fuel cell system gas⁃water separator′s own structural characteristics,as well as the problems existing in current commonly used integral drainage strategy of not being able to accurately judge the separator′s water level,and the low control accuracy and poor reliability of the system′s drainage strategy,the author integrates a liquid level sensor in the gas⁃water separator,which transforms the complex algorithmic control of the fuel cell system′s drainage valve into a simple switching control.After experimental verification,the range of anode pressure fluctuation of the system during drainage is small,the output performance of the electric stack is stable,and the hydrogen loss is low.The optimization method of the gas⁃water separator of the fuel cell system and its intermittent discharge strategy of the drainage valve is effective,which helps to further popularize the use of fuel cell vehicles.