Control system for fuel cell

摘要

A control system for a fuel cell includes a reactant gas supplying unit which supplies a reactant gas to the fuel cell, and a discharged reactant gas flow control unit disposed at an outlet of the fuel cell. The discharged reactant gas flow control unit includes a first control valve and a second control valve disposed in parallel with the first control valve. The second control valve has a different pressure-flow control characteristic as compared with the first control valve. Only the second control valve controls the flow rate of a discharged reactant gas until the flow rate exceeds a predetermined value, and the second control valve together with the first control valve controls the flow rate of the discharged reactant gas when the flow rate of the discharged reactant gas exceeds the predetermined value.