Abstract: A fuel cell system supplies a reacting solution from a liquid storage section to a reaction section to generate a reacting gas. A gas storage section stores the reacting gas and supplies it to a solid polymer membrane fuel cell which generates electricity using the reacting gas as fuel. The reacting solution is supplied from the liquid storage section to the reaction section when the pressure in the liquid storage section is higher than the pressure in the reaction section and the supply of reacting solution is stopped when the pressure in the liquid storage section is lower than the pressure in the reaction section. In this manner, the supply volume of the reacting solution is controlled in accordance with the driving state of the fuel cell.

Abstract: A fuel cell system comprises a liquid storage section for storing a reacting solution, a reacting section for generating reacting gas from the reacting solution, a gas storage section for storing the reacting gas supplied from the reacting section, and a fuel cell for generating electricity while the reacting gas is being used as fuel. A reacting solution supply volume adjusting device supplies 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 stops the supply of the reacting solution when the pressure in the liquid storage section is lower than the pressure in the reacting section.