Patent ID: 6864003

Claim:
A control device for a fuel cell comprising: a transient state determination unit which determines whether changes in generated output of said fuel cell are within a predetermined range; said transient state determination unit including: a supply line through which hydrogen is supplied to an inlet portion of said fuel cell, and a discharge line through which hydrogen is discharged from said fuel cell; a hydrogen circulation line which connects said supply line and said discharge line; and a hydrogen purge valve provided with said discharge line, a hydrogen purge detection unit which detects the presence/absence of a purge command to said hydrogen purge valve; a failure determination unit which determines, if said transient state determination unit determined that it is not a transient state, failure in said hydrogen purge valve based on an actual hydrogen pressure value at said inlet portion and a target hydrogen pressure value, which is set in accordance with the presence/absence of the purge command detected by said hydrogen purge detection unit; and an alarm unit which generates an alarm when failure in said hydrogen purge valve is determined by said failure determination unit.