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FUEL CELL SYSTEM

  • US 20100316921A1
  • Filed: 10/29/2008
  • Published: 12/16/2010
  • Est. Priority Date: 11/02/2007
  • Status: Active Grant
First Claim
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1. A fuel cell system comprising:

  • a fuel cell that generates electric power through an electrochemical reaction between a fuel gas and an oxidant gas;

    a motor that can be driven upon a supply of electric power and can generate regenerative power;

    a power storage unit which is connected in parallel with the fuel cell with respect to the motor and which can be charged with power generated from the fuel cell and regenerative power of the motor and can discharge charge power to the motor;

    an auxiliary apparatus that is used for operating at least the fuel cell; and

    a control unit that controls a power distribution between the fuel cell, the power storage unit, the motor and the auxiliary apparatus, whereinthe control unit determines the power distribution using a power generation command value based on power required to be generated during a normal operation, while the control unit determines the power distribution using a power generation measured value of the fuel cell instead of the power generation command value during a high-potential prevention control that avoids a voltage of the fuel cell becoming equal to or higher than a predetermined high-potential prevention voltage threshold lower than an open circuit voltage of the fuel cell.

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