| 摘要 |
The present invention relates to a method for operating a fuel cell system and, in particular, to a pressuring method for operating a fuel cell system capable of improving the efficiency of the fuel cell system and maintaining the voltage stability of a stack. That is to say, the present invention provides the method for operating a fuel cell system capable of maintaining the voltage stability of the stack, improving the efficiency of the system, and improving the cooling performance of a vehicle because pressuring operation is enabled in case of the rise of operation temperature by adjusting the opening angle of a rear-end pressure controller depending on current density in case of the high-temperature operation of the fuel cell system and controlling air SR change depending on the pressure of air operation. [Reference numerals] (AA) Current density VS. Operating pressure and air SR;(BB) Operating pressure / %;(CC) Operating pressure;(DD) Air SR;(EE) Current density / %;(FF) Air SR / % XA |
