COOLING DEVICE OF FUEL CELL

PROBLEM TO BE SOLVED: To provide a cooling device of a fuel cell capable of accurately detecting the use rate of ion exchange resin stored in an ion exchanger. SOLUTION: This cooling device of the fuel cell comprises a circulating route 1 for circulating cooling water between a fuel cell 20 and a radiator 30, a pump 2 installed in the circulating route 1, a bypass route 3 branched from the circulating route 1 and merging to the circulating route 1 after bypassing the fuel cell, and the ion exchanger 4 installed in the bypass route 3 to adsorb ions in the cooling water. The cooling device also comprises electric conductivity sensors 5a and 5b for measuring the electric conductivity of the cooling water at the outlet and inlet of the ion exchanger 4. The use rate of the ion exchange resin stored in the ion exchanger 4 is calculated by the ratio of the electric conductivities of the cooling water at the inlet and outlet of the ion exchanger 4. COPYRIGHT: (C)2004,JPO