质子交换膜燃料电池堆输出电流调节装置设计

Design of output current regulation device in fuel cells stack control system

针对车用质子交换膜燃料电池关键部件膜电极的劣化模式,提出了一种基于2个电流调节器协同工作的燃料电池堆输出电流控制方法,采用由燃料电池主控单元根据车辆的运行工况和电池堆的运行状态,协同控制2个电流调节器的电流方向和平均电流值,实时优化调整燃料电池堆输出电流和动力电池组充放电电流的配比,能够有效解决膜电极高电位和电位循环的问题。

According to degradation mode of the membrane electrode parts in the automotive proton exchange membrane fuel cells stack, a fuel cells stack output current control method was proposed based on the coordinated control mechanism of two current regulators. Depending on the vehicle operating condition and fuel cells stack operating state, the current direction and average current value of the two current regulators were controlled cooperatively. The ratio of the output current of fuel cells stack and the current of power battery charge and discharge were optimized and adjusted in real time. Then the problems of high potential and potential cycle in the membrane electrode could be solved.