FUEL CELL SYSTEM CONTROL METHOD AND FUEL CELL VEHICLE

摘要

In a control method for a fuel cell system, a fuel cell side converter that is provided between a fuel cell and an inverter is controlled to step up a fuel cell voltage to an inverter terminal voltage supplied to the inverter. A margin voltage is set to guarantee step-up operation or interruption of operation of the fuel cell side converter. A directly connected state or a voltage transforming state regarding an operation state of an energy storage device side converter is selected such that the inverter terminal voltage is higher than a sum of the margin voltage and the fuel cell voltage. The energy storage device side converter does not transform the energy storage device voltage in the directly connected state. The energy storage device side converter transforms the energy storage device voltage to the inverter terminal voltage in the voltage transforming state.

主权项

1. A control method for a fuel cell system, comprising:
controlling an inverter to transform a fuel cell voltage generated by a fuel cell and an energy storage device voltage generated by an energy storage device to supply power to a motor; controlling a fuel cell side converter that is provided between the fuel cell and the inverter to step up the fuel cell voltage to an inverter terminal voltage supplied to the inverter; setting a margin voltage to guarantee step-up operation or interruption of operation of the fuel cell side converter; and selecting a directly connected state or a voltage transforming state regarding an operation state of an energy storage device side converter that is provided between the energy storage device and the inverter such that the inverter terminal voltage is higher than a sum of the margin voltage and the fuel cell voltage, the energy storage device side converter not transforming the energy storage device voltage in the directly connected state, the energy storage device side converter transforming the energy storage device voltage to the inverter terminal voltage in the voltage transforming state.