APPARATUS FOR CONTROLLING HYDROGEN SUPPLY OF FUEL CELL SYSTEM, AND METHOD FOR CONTROLLING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an apparatus for controlling hydrogen supply of a fuel cell system and a method for controlling the same, that can secure enough hydrogen recirculation amount even at a low output power section by using a normal jet pump.SOLUTION: The apparatus for controlling hydrogen supply of the fuel system includes: a jet pump 16, which is provided on an inlet side of a fuel cell stack 30 to form a recirculation flow by supplying hydrogen to the fuel cell stack; a proportional control solenoid valve 40, which is connected to a hydrogen supply line and communicates with the nozzle inlet of the jet pump to control supply of hydrogen to the jet pump; and a valve controller 22 which controls the drive of the proportional control solenoid valve by the output of the fuel cell system. The valve controller controls the drive of the proportional control solenoid valve according to a pulse flow control method at a low output power section where the output power of the present status is lower than a predetermined reference output power, and controls the drive of the proportional control solenoid valve according to a method of controlling the proportion at a high output power section where the present status output power is higher than the predetermined reference output power.