An electrochemical engine in a vehicle comprises a fuel cell stack operable to produce electricity given hydrogen and oxygen, an air generator to supply oxygen to the fuel cell stack, and a first storage tank containing hydrogen-retention material which up...

A method of heating a cold MEA to accelerate cold start-up of a PEM fuel cell. The MEA is locally heated from below freezing to a suitable operating temperature by the exothermal chemical reaction between H2 and O2 on the anode and/or cathode catalysts. To...

A PEM fuel cell having serpentine flow field channels (66a-66j) comprising a plurality of serially-linked serpentine segments (A-E) extending between inlet (72) and exhaust (74) manifolds. Each segment has an inlet leg (76), an exit leg (78), at least one ...

A PEM fuel cell having serpentine flow field channels wherein each channel has an inlet leg, an exit leg, at least one medial leg therebetween and hairpin curves connecting the legs to each other. The legs all extend in the same general direction between a...

A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particle...

A hybrid powertrain (10) has a suitable heat engine (12) having rotational output, a multi-speed transmission (14) and a motor/generator (MG) (16). The transmission input or cluster shaft (20) is continuously connected with the MG. One set of ratio gears (...

An electrochemical fuel cell stack comprising an upper end plate assembly (14); a lower end plate assembly (16); at least one electrochemical fuel cell assembly (12) interposed between the upper and lower end plate assemblies; and a clamp mechanism operati...