1.5kW质子交换膜燃料电池堆动态工况响应特性

Response features of a 1.5 kW proton exchange membrane fuel cell stack for dynamic cycle

考察了自制1.5kW质子交换膜燃料电池(PEMFC)电堆在动态工况下的性能。研究了PEMFC电堆电压、功率、反应参数随车载工况运行出现的响应情况。发现在大电流密度下,由于各单电池的差异,电堆电压和功率出现比较明显的波动现象。在选定两个工况周期中,电堆各单电池电压的差异系数CV最大达到4.23%,最高单电池电压和最低单电池电压相差0.106V。数据分析表明在该动态工况下,PEMFC电堆的动态响应特性受到反应物和电堆温度变化、空气局部流量过大或不足以及电堆内部阳极和阴极出现明显压降等因素的影响。该研究不仅为后续耐久性测试提供分析依据,还对PEMFC电堆实际车载运行参数与控制策略的优化具有指导意义。

The performance of a homemade 1.5 kW proton exchange membrane fuel cell（PEMFC）stack was evaluated under dynamic drive cycle,and the variation features（response）of PEMFC stack voltage,power and reaction parameters were investigated at various onboard operation modes.It is found that there is more obvious fluctuation of stack power and voltage at high current densities due to difference between single cells.The highest variation coefficient（CV）is 4.23% for two dynamic drive cycle periods;the difference value between the maximum and the minimum cell voltage is 0.106 V.Data analysis indicates that PEMFC stack performance could be affected by some factors such as temperature changes of reactants and cell stack,air overflow or starvation,obvious pressure drop between anode and cathode,etc.This research could not only provide a basis for measurement and analysis of durability,but also is of important significance for parameter optimization of PEMFC running onboard