Patent ID: 8338045

Claim:
A fuel cell system comprising: a liquid storage section for storing a reacting solution; a reacting section for generating reacting gas from the reacting solution supplied from the liquid storage section; a gas storage section for storing the reacting gas supplied from the reacting section; a fuel cell for generating electricity while the reacting gas supplied from the gas storage section is being used as fuel, the fuel cell having an electrode connected to a solid high molecular electrolyte film; means for supplying the reacting solution from the liquid storage section to the reacting section when the pressure in the liquid storage section is higher than the pressure in the reacting section and for stopping the supply of the reacting solution when the pressure in the liquid storage section is lower than the pressure in the reacting section; and a pressure adjusting device that suppresses a reduction in the pressure in the liquid storage section caused when the reacting solution is supplied from the liquid storage section to the reacting section, the pressure adjusting device having a port through which air at atmospheric pressure is supplied into the liquid storage section, and a check valve for obstructing backward flow of the air from the liquid storage section through the port.