US Patent 8383280 Fuel cell separator plate with integrated heat exchanger

A fuel cell separator plate having a planar substrate having a main body with first and second opposed major surfaces, a first open channel reactant flow field recessed in the first major surface, and a first segment extending from the main body, and a thermally and electrically conductive first current collector layer having a flow field portion on the first major surface of the main body and a heat exchange portion extending from the flow field portion onto the first segment such that heat in the flow field portion conducts to the heat exchange portion during fuel cell use.