SOLID OXIDE TYPE FUEL BATTERY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a solid oxide type fuel battery system which is arranged so that the fuel electrode oxidation and the air electrode reduction of a fuel battery cell can be avoided by shutdown stop.SOLUTION: A solid oxide type fuel battery system (1) comprises: a fuel battery module (2); a fuel-supply device (38); a water-supply device (28); an air-supply device (45); a reformer (20); a voltage detection sensor (126) for detecting an output voltage; a shutdown-stop circuit (110a); an exhaust-control circuit (110d); and an exhaust-control-stop circuit (110e). The shutdown-stop circuit executes a shutdown stop. The exhaust-control circuit activates the air-supply device to exhaust air remaining in the fuel battery module after the shutdown stop. The exhaust-control-stop circuit stops exhaust control if a detection voltage of the voltage detection sensor satisfies a condition for stop during the time when exhausting the air.