质子交换膜燃料电池动态特性仿真

MODELING AND SIMULATION OF PEM FUEL CELL DYNAMIC BEHAVIORS

建立了质子交换膜燃料电池数学模型,并进行了仿真实现,计算分析了质子交换膜燃料电池典型动态特性和温度对其工作状况的影响。结果表明PEMFC内气体传质速度是影响电压响应时间的决定因素,扩散层内液态水的积累需要较长的时间,数量级在10^2～10^3 s,温度升高会降低PEMFC的动态响应时间并提高电池的输出功率,温度超过80℃后会降低电池的输出性能。

The PEM fuel cell model which contains a mass transfer submodel and an electric submodel is established and implemented in SIMULINK environment. The influences of the response of PEM fuel cell in transient working condition and temperature on the performance of fuel cell have been studied. It is found that the gas phase transfer velocity is the determinative faction of cell response time. The new balance of liquid water saturation in gas diffusion layer needs long time which is about 10^2-10^3 s. The cell response time decreased when temperature increased as well as the cell output power turn to be lower when temperature higher than 80℃.