18708371. FUEL CELL DETERIORATION DETERMINATION DEVICE AND FUEL CELL VEHICLE (SUBARU CORPORATION)
FUEL CELL DETERIORATION DETERMINATION DEVICE AND FUEL CELL VEHICLE
Organization Name
Inventor(s)
Hideyuki Taneoka of Tokyo (JP)
FUEL CELL DETERIORATION DETERMINATION DEVICE AND FUEL CELL VEHICLE
This abstract first appeared for US patent application 18708371 titled 'FUEL CELL DETERIORATION DETERMINATION DEVICE AND FUEL CELL VEHICLE
Original Abstract Submitted
A fuel cell deterioration determination device includes an impedance measurer and a deterioration determiner. The impedance measurer applies an alternating current signal to a fuel cell stack and measure an alternating current impedance of the fuel cell stack. The deterioration determiner estimates, based on a characteristic of the measured alternating current impedance, a degree of an activation overvoltage in the fuel cell stack as deterioration of the catalyst metal, and also a degree of a diffusion overvoltage in the fuel cell stack as deterioration of the catalyst carrier. The deterioration determiner determines, based on reference values of the activation overvoltage and the diffusion overvoltage with respect to a vehicle travel distance held in advance, progresses of the deterioration of the catalyst metal and the deterioration of the catalyst carrier.