Control method of fuel cell hybrid system

摘要

PURPOSE: A control method of fuel cell hybrid system is provided to improve durability of the fuel cell system by using OCV domain avoidance operation. CONSTITUTION: A control method of fuel cell hybrid system comprises the following steps: driving vehicles in a normal driving mode of the fuel system; stop providing air to the fuel battery in order to stop power generation of the fuel battery and lowering fuel battery voltage if idle stop condition is satisfied; maintaining voltage of a bidirectional power conversion device by lowering the voltage to a set value; forcedly charging output power of the fuel cell with high voltage battery due to maintenance of voltage; and lowering voltage of the fuel cell battery less than voltage of the power conversion device. An EV mode driving is executed which runs a drive motor only with high voltage battery output.