| 摘要 |
The invention relates to a method of humidifying membranes (4a-c) in a polymer electrolyte membrane fuel cell assembly (14), and comprises periodically exposing said membranes, to pulses of an aqueous phase, in order to humidify said membranes. It also relates to a system for the controlled humidification of the membranes in a polymer electrolyte membrane fuel cell assembly (14). The system comprises a plurality of polymer electrolyte membrane fuel cells (13a-c) coupled to a source (18) of aqueous phase for the humidification of said membranes (4a-c). There are inlets for reactant gases to the reaction compartments (24a-c, 25a-c) of the cells (13a-c), and a plurality of valves (17a-c, 21a-c), controlling the inflow of aqueous phase and reactants, respectively, into the cells. A control unit (26) is programmed to control said valves to open and close according to a predetermined algorithm, such that the supply of aqueous phase will be in the form of pulses. |
