| 摘要 |
A hydrogen supply system for shut-down in a fuel cell vehicle is provided to prevent deterioration of a stack with time after the shut-down of a fuel cell vehicle by maintaining an anode and a cathode at a low potential. A hydrogen supply system for shut down in a fuel cell vehicle including hydrogen tank(2), an air supplying unit and a stack for generating electric energy by reacting hydrogen and oxygen supplied from the hydrogen tank and the air supplying unit, respectively, comprises: a hydrogen feeding line(100) linked to the hydrogen tank and the stack, and comprising a first control valve(110) for controlling the feed of hydrogen gas from the hydrogen tank, and a first pressure regulator (120) for regulating the pressure of hydrogen supplied to the stack via the first control valve; a shut-sown hydrogen line(200) comprising a second control valve(210) whose one end is branched from the line preceding the first control valve and the other end is linked to the hydrogen feeding line between the first pressure regulator and the stack so as to control turning on/off of the feed of hydrogen from the hydrogen tank while the first valve is turned off upon the shut-down of the fuel cell vehicle, and a second pressure regulator(220) disposed in front of the second control valve for stably controlling the pressure of hydrogen supplied through the first control valve; and a control unit(300) for interrupting the feeding of hydrogen from the hydrogen feeding line upon the shut-down of the vehicle and for causing the hydrogen to be supplied through the shut-down hydrogen line. |
