Patent ID: 8492040

Claim:
A fuel cell system comprising: a drive motor; a fuel cell that supplies the drive motor with electric power; and a controller configured to: perform normal electric power generation under a condition in which the fuel cell is not warmed up; perform warm-up electric power generation with lower electric power generation efficiency than the normal electric power generation to cause a system loss for warming up the fuel cell; control performance of warm-up electric power generation on a basis of a predetermined index on a necessity to warm up the fuel cell, and control an operation state of the fuel cell during warm-up electric power generation on a basis of a correlation between the system loss required for warm-up of the fuel cell and a warm-up output required for driving of a load including the drive motor during warm-up of the fuel cell, wherein the controller is configured to control the operation state of the fuel cell on a basis of (i) a first predetermined curve that shows the system loss required for warm-up of the fuel cell, and (ii) a second predetermined curve that shows the warm-up output required for driving of the load including the drive motor during warm-up of the fuel cell.