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Control method for fuel cell vehicle, and fuel cell vehicle

  • US 7,946,365 B2
  • Filed: 02/01/2007
  • Issued: 05/24/2011
  • Est. Priority Date: 02/03/2006
  • Status: Expired due to Fees
First Claim
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1. A control method for a fuel cell vehicle including a motor being a driving source of the fuel cell vehicle, a motor controller for controlling an operation status of the motor, and a fuel cell system being a power source for the motor,said fuel cell system including:

  • a fuel cell which receives reaction gasses and performs electrochemical reactions to generate an electrical power, a power storage device which is charged with the generated electrical power from the fuel cell and a regeneration power from the motor;

    a first DC-DC converter provided between the power storage device and the motor controller; and

    a second DC-DC converter provided between the fuel cell and the motor controller, the first DC-DC converter and the second DC-DC converter both including switching elements, the switching elements performing switching operations to control voltage,said control method for a fuel cell vehicle comprising;

    obtaining a target motor output power corresponding to an accelerator opening degree; and

    controlling operation of the first DC-DC converter and the second DC-DC converter, such that an output voltage of the fuel cell system becomes equal to or larger than a predetermined voltage that is required for securing a desired motor output power, when the target motor output power is larger than a predetermined output power threshold value.

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