Bipolar plate for polymer electrolyte membrane fuel cell, has feed channel whose connecting portions are formed with connecting passages, where connecting passages have constant width and are connected to feed or discharge channel

摘要

The plate (3) has a feed channel (39) and a discharge channel (45) connected by a set of connecting passages (41) such that distance from an inlet opening (37) to an outlet opening (47) through the individual connecting passages is constant. Connecting portions (43) of the feed channel are formed with the connecting passages, where the connecting passages have constant width. Nubs form a channel structure on concentric circular paths. The connecting passages are connected via a common inlet (51) and outlet (53) to the feed channel or discharge channel.