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FUEL CELL SYSTEM AND METHOD FOR LIMITING CURRENT THEREOF

机译:燃料电池系统及其电流限制方法

摘要

In a fuel cell system comprising a fuel cell with plural cells and performing processing for limiting a supply current to a load by performing a compensation computation with respect to a system-request current corresponding to a system-request power requested by the system based on the lowest cell voltage in the cells, the compensation computation being performed for limiting the supply current through a PI compensation using, as a reference value, a current value of the system-request current as of the time when the lowest cell voltage falls below a predetermined lowest-cell-voltage acceptable value, values for gains in the PI compensation for limiting the supply current are different from values for gains in the PI compensation for restoring the supply current. The system-request current can be securely limited in any operation statuses, and in addition, the supply current can be made rapidly responsive during the limitation of the current, while the supply current can be stably converged during the current restoration.
机译:在一种燃料电池系统中,该燃料电池系统包括具有多个电池的燃料电池,并且通过基于与该系统所请求的系统请求功率相对应的系统请求电流进行补偿计算,来进行用于限制对负载的供给电流的处理。电池中的最低电池电压,执行补偿计算以使用最低电池电压降至预定值以下时的系统请求电流的电流值作为参考值来限制通过PI补偿的电源电流在最低电池电压可接受值的情况下,用于限制电源电流的PI补偿的增益值与用于恢复电源电流的PI补偿的增益值不同。可以在任何操作状态下可靠地限制系统请求电流,此外,在电流限制期间可以使电源电流快速响应,而在电流恢复期间可以稳定地收敛电源电流。

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