Parallelepiped shaped polar or bipolar plate for proton exchange membrane type fuel cell, has outer surface including strips that are oriented along directions having non-zero angle with respect to cooling gas circulation direction

摘要

The plate (1) has an outer surface including straight strips (3-5) co-operating with blades of an outer surface of another plate of an adjacent cell for forming cooling gas cross-corrugated guiding channels, where the plates are made of graphite, composite material and metal alloy. Cooling gas inlet and outlet sides (E, S) define a cooling gas circulation direction (D) between two adjacent plates. The strips in diagonal manner are oriented along directions having a non-zero angle ranging from 1 to 60 degree, with respect to the direction (D).