Patent ID: 8722258

Claim:
An open fuel cell system comprising: a main fuel cell that generates electricity by reacting hydrogen with the oxygen in the air; a supply unit that supplies the hydrogen and the air to the main fuel cell; a recirculating unit that recirculates hydrogen discharged from the main fuel cell to the main fuel cell; a sensing unit that senses voltage of a plurality of cells in the main fuel cell; a reproducing unit that selectively communicates with a side of the main fuel cell and removes water and impurities in the main fuel cell; a humidifying unit that supplies the water in the air discharged from the main fuel cell to the main fuel cell; and a control unit that controls the operations of the supply unit, the recirculating unit, the sensing unit, the reproducing unit, and the humidifying unit, wherein the recirculating unit includes: a gas-liquid separator that separates hydrogen and water produced in the main fuel cell, and wherein the humidifying unit includes: a humidifying pipe that guides moist air discharged from the gas-liquid separator into a humidifier that supplies hydrogen and air humidified in the main fuel cell: and a humidification control valve that selectively closes the humidifying pipe, and wherein the reproducing unit includes: a reproducing pipe that guides the flow direction of the hydrogen passing through the main fuel cell; a reproducing valve that selectively closes the reproducing pipe; a sacrifice fuel cell that produces water by reacting the hydrogen supplied from the reproducing pipe with air therein; an air intake pipe that guides air flowing into the sacrifice fuel cell; and a water collecting unit that collects the water produced in the sacrifice fuel cell.