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METHOD FOR CONTROLLING OUTPUT OF FUEL CELL IN FUEL CELL HYBRID VEHICLE

  • US 20090325004A1
  • Filed: 12/15/2008
  • Published: 12/31/2009
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
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1. A method for controlling output of a fuel cell in a fuel cell hybrid vehicle including a fuel cell as a main power source and a storage means as an auxiliary power source, the vehicle comprising a power converter disposed between the fuel cell and the storage means and provided for a constant current operation of the fuel cell and a directly connected switch for directly connecting/disconnecting between the fuel cell and the storage means, the method comprising controlling the output of the fuel cell according to the amount of electrical energy of the storage means by a mode selected from the group consisting of a fuel cell stop mode in which power generation of the fuel cell is stopped, a fuel cell constant current mode in which the power converter is operated so that the fuel cell is operated at a constant power at a maximum efficiency point, and a fuel cell-storage means direct connection mode in which the fuel cell and the storage means are directly connected by the directly connected switch and then the output of the fuel cell is controlled according to a load required by the vehicle.

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