METHOD OF CONTROLLING FUEL CELL SYSTEM, METHOD OF CONTROLLING FUEL CELL AUTOMOBILE, AND FUEL CELL AUTOMOBILE

摘要

A method of controlling a fuel cell system, a method of controlling a fuel cell automobile, and a fuel cell automobile are provided. When the SOC of a battery gets closer to an upper limit, there is a risk that overcharging of the battery may occur. In this case, using a BAT converter, inverter terminal voltage is stepped up to FC open circuit voltage or higher, whereby a step-up type FC converter is placed in an interruption state.

主权项

1. A method of controlling a fuel cell system, the fuel cell system comprising:
a fuel cell configured to generate fuel cell voltage as a primary voltage; an electrical storage device configured to generate electrical storage device voltage as another primary voltage; a load drive unit to which a secondary voltage is supplied, the load drive unit being configured to drive a load; a first converter provided between the electrical storage device and the load drive unit, and configured to perform voltage conversion between the electrical storage device voltage and the secondary voltage; and a second converter provided between the fuel cell and the load drive unit, and configured to perform voltage conversion between the fuel cell voltage and the secondary voltage, the method comprising: a secondary-voltage stepping-up step of controlling the first converter to thereby allow the secondary voltage to become higher than the fuel cell voltage, without following a change of required electrical power for the load.