Method of controlling a cooling fan for a fuel cell stack

A method of controlling a cooling fan for a fuel cell stack, the method comprising:

• determining, by a controller, whether a predetermined duty map update condition is satisfied based on a state variable for cooling fan control during driving of a cooling fan for cooling water heat dissipation of a fuel cell stack;
• when the duty map update condition is satisfied, determining, by the controller, available power of the fuel cell stack for each cooling water temperature corresponding to a current fuel cell stack deterioration, the current fuel cell stack deterioration corresponding to current fuel cell stack deterioration based on a current cooling water temperature and set data for each fuel cell stack deterioration;
• determining, by the controller, a target cooling water temperature at which available power of the fuel cell stack is maximized from the determined available power of the fuel cell stack for each cooling water temperature;
• and
• updating, by the controller, a cooling fan duty map for pulse width modulation (PWM) control of the cooling fan using the target cooling water temperature at which the determined available power of the fuel cell stack is maximized.