System and method of draining residual water of a fuel cell for a vehicle

A system of draining residual water of a fuel cell for a vehicle, the system comprising:

• a fuel cell;
• an outdoor temperature sensor configured to measure an outdoor temperature;
• a drainer configured to drain residual water in the fuel cell;
• and
• a controller configured to control the drainer to preemptively drain the residual water in the fuel cell before parking of the vehicle is completed or an operation of the fuel cell is terminated, when a parking available situation is detected during driving of the vehicle in a state where the outdoor temperature is equal to or less than a reference temperature,
• wherein the controller is configured to limit an operating voltage of the fuel cell to be less than a reference voltage when the parking available situation is detected, and the controller is further configured to control driving of the drainer based on a set minimum air supply supercharge ratio to drain the residual water in the fuel cell.

A method of draining residual water of a fuel cell for a vehicle, the method comprising:

• determining, by a controller, whether a parking available situation is detected during driving of the vehicle in a state where an outdoor temperature is equal to or less than a reference temperature;
• and
• preemptively controlling, by the controller, a drainer before parking of the vehicle is completed or an operation of the fuel cell is terminated in a case where the parking available situation is detected during the driving of the vehicle, thus draining the residual water in the fuel cell,
• wherein the parking available situation is a case where an automatic parking function of the vehicle is activated, a case where the vehicle enters a parking lot, or a case where a vehicle speed is low and a parking driving line is recognized around the vehicle.