Patent ID: 7514169

Claim:
A fuel cell system mounted on a vehicle, the system comprising: a fuel cell stack: a water supply cycle comprising: a piping; a cooling water pump which supplies the cooling water to the fuel cell stack; and a radiator which performs heat exchange between a cooling water and a cooling air, wherein the fuel cell stack, the cooling water pump and the radiator are connected to each other by the piping; n numbers of pressure detectors provided on the piping and detecting pressure of the cooling water, the n being an even number of two or greater, wherein if a center point of a cross-section of the piping is divided into n numbers of equal parts by axis lines and one of the axis lines is set as an axis line of a reference pressure detector, the other pressure detector is provided within an angle range of ±360/2n degrees about the other axis line, and wherein the pressure detectors are placed in a position where pressure variation of the cooling water in the piping is caused by lateral acceleration, longitudinal acceleration, or vertical acceleration of the vehicle; and a controller which determines a pressure anomaly of the cooling water within the piping by comparing a predetermined anomaly value to an added value or an average value of pressure values detected by the n numbers of pressure detectors, wherein when the controller determines that there is the pressure anomaly of the cooling water in the piping, the controller controls the cooling water pump to stop supply of the cooling water to the fuel cell stack.