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HYDROGEN SUPPLY SYSTEM FOR FUEL CELL AND METHOD FOR CONTROLLING THE SAME

  • US 20090269624A1
  • Filed: 11/10/2008
  • Published: 10/29/2009
  • Est. Priority Date: 04/28/2008
  • Status: Abandoned Application
First Claim
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1. A method for accelerating activation of a fuel cell, the method comprising:

  • a first step of supplying hydrogen to a fuel electrode of a fuel cell and air to an air electrode of the fuel cell and maintaining a cell voltage at an opening-circuit voltage of a predetermined level;

    a second step of cutting off air supply to the air electrode;

    a third step of reducing the cell voltage from the predetermined level of the opening-circuit voltage to a threshold level after cutting off the air supply to the air electrode;

    a fourth step of supplying air to the air electrode again to increase the opening-circuit voltage to the predetermined level when the opening-circuit voltage is reduced to the threshold level;

    a fifth step of supplying a sufficient amount of hydrogen and air to the fuel electrode and the air electrode, respectively, and operating the fuel cell in a constant current or constant voltage operation mode; and

    a sixth step of repeating the first to fifth steps for a predetermined number of times.

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