A bipolar plate assembly for a fuel cell having a pair of stamped plates joined together to define a coolant volume therein. Each of the pair of stamped plates have a flow field arranged to maximize the contact area between the plates while allowing coolant to distribute and flow readily within the coolant...http://www.google.co.uk/patents/US7459227?utm_source=gb-gplus-sharePatent US7459227 - Stamped fuel cell bipolar plate
