| 摘要 |
PURPOSE:To provide a fuel-cell control device which can control flow rates at which oxygen and hydrogen are supplied to a fuel cell commensurately with the load of the fuel cell while controlling the fifferential pressure between the supplied oxygen and hydrogen without mixing them. CONSTITUTION:Pressure signals (PH) and (PO) obtained through pressure-detecting elements 16 and 17 installed in downstream from flow-rate controlling valves 6 and 7 are sent to a computer unit 18 where the pressures of the oxygen and the hydrogen sides are compared with each other to obtain a signal of high value preferred operation by which a pressure control valve 10 or 11 is driven. Owing to the operation of the valve 10 or 11, the fluid of higher pressure is exhausted downstream from an exhaust check valve 8 or 9, after bypassing the fuel cell body 5. In addition, even in a state of emergency when a pressure difference becomes over 0.7kg/cm<2> at the time of a sudden change in the supply pressure of oxygen or hydrogen or supply pressure of either oxygen or hydrogen becomes abnormally high, any breakage of an electrolyte chamber 1 can be prevented by driving either pressure-controlling valve 10 or 11 on higher pressure side. |
