Polymer electrolyte membrane fuel cell with dosing space and production process has separation wall forming closing space for feeding controlled amount of oxidant to cathode space

摘要

A polymer electrolyte membrane (PEM) fuel cell comprises a membrane electrode arrangement, a cathode space with a far wall connected to a separation plate and a separation wall (23) that separates a further space (dosing space) (26) from the cathode space. The dosing space has a fluid connection to the cathode space so that oxidant can be dosed from the dosing space into the adjacent cathode space. The separation wall alters the depth (13,13") of the dosing channel (27) so that the amount of oxidant dosed is predetermined and fixed. An independent claim is also included for the production of a separation plate for the above.