Patent ID: 8293413

Claim:
A fuel cell system comprising: a fuel cell which generates power through an electrochemical reaction of reaction gases; a gas supply channel through which the reaction gas is supplied to the fuel cell; a gas supplying device provided on the gas supply channel; a temperature detecting unit which detects a temperature of the reaction gas; an intercooler which cools a gas which has passed through the gas supplying device; a coolant channel through which a coolant which cools the intercooler flows; a coolant pump provided on the coolant channel; and a controller, wherein the controller comprises a cooling section abnormality determining unit which is programmed to determine the presence or absence of an abnormal state of the coolant pump, and a gas supplying device operation controlling unit which is programmed to control, when it is determined that an abnormality has occurred in the coolant pump, a rotational speed of the gas supplying device is increased or decreased so that the temperature of the reaction gas is less than or equal to a predetermined value according to the temperature of the reaction gas detected by the temperature detecting unit, and wherein the cooling section abnormality determining unit is programmed to determine the presence or absence of an occurrence of an abnormality of the coolant pump based on a detection signal indicating a rotational speed of a coolant pump motor when there is a request to rotate the coolant pump motor which drives the coolant pump, based on detection of occurrence of disconnection or short-circuiting in a circuit connected to the coolant pump motor, or based on an abnormal decrease or an abnormal increase in a temperature of the coolant pump motor.