Metallic bipolar plate for proton exchange membrane fuel cell stack, has two medium guiding channels, where area of surface of plate forms part of channels and are provided with coating that has thermally isolating characteristics

摘要

Plate has a medium guiding channel (4) forming a side of the plate, where the side faces diaphragm electrode arrangements and another medium guiding channel (2) provided for a cooling agent. Areas of the surface of the plate are provided with a coating, where the coating has thermally isolating characteristics. The areas are provided for electrical contacting between the plate and an electrode and form a part of the channels.