| 摘要 |
The invention relates to a system and a method for eliminating reverse current decay in the fuel cells. According to the invention, the system comprises -a fuel cell having an anode and a cathode; -a fuel feed system for supplying the anode of the fuel cell with fuel and forming an anode system; -a bypass line fitted in parallel and in flow connection with said anode system and capable of circulating fuel past the anode; -an oxygen reduction unit; and - a pressure unit for circulating gas in at least part of said anode system and said bypass line. The bypass line is adapted to receive and circulate a flow of hydrogen during a fuel cell shutdown in order to mix the hydrogen with any oxygen present in the anode system, and to remove the oxygen from the anode system in said oxygen reduction unit by catalytic conversion. A control unit for receiving sensing signals representative of the state of the oxygen reduction process and controlling the amount of hydrogen passing through the system in response to said sensor is also described. |
