Patent ID: 7811719
Filing Date: 2010-10-12
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A PEM fuel cell, with a membrane-electrode assembly (MEA), a cathode chamber, which borders on the cathode of the MEA and on its side facing the cathode is defined for one part by a separator plate assembly and for the other part by a partition wall, which partition wall is arranged on the cathode side of the separator plate assembly and is joined to the separator plate assembly, whereby the partition wall separates at least one charging chamber from the cathode chamber and whereby the at least one charging chamber possesses in at least one charging spot a fluid connection to the adjoining cathode chamber, so that oxidant can be charged from the charging chamber through the charging spots into the adjoining cathode chamber, and wherein the depth of the distribution channels increases along the flow direction from the charging region to the cathode outlet, and, complementary to this, the depth of the charging channels decreases along the flow direction from the oxidant port to the end of the charging region, such that the quantity of oxidant that is charged at a charging spot from the charging chamber into the cathode chamber can be set in advance.