To ensure limiting of a system demand current in any operation state, and to stably restore supply current at current recovery time while speedily allowing it to respond at current limiting time.
In a fuel battery system provided with a fuel battery equipped with a plurality of cells and carrying out a process of limiting supply current to a load by making compensation operation based on a minimum cell voltage Vm against a system demand current corresponding to system demand power demanded of the system, the compensation operation for limiting the supply current I1 by PI compensation is carried out with a current value of a system demand current I0 when the minimum cell voltage Vm falls short of a given minimum voltage tolerance Vth as a reference value, where, a gain of the PI compensation in the case of limiting the supply current I1 and a gain of the PI compensation in the case of recovering the supply current are set to have different values.
MANABE KOTA
OGAWA TOMOYA
Shinji Oga
Toshifumi Onuki
Akihiko Eguchi
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