1
David P Wilkinson, Henry H Voss, Keith B Prater: Lightweight fuel cell membrane electrode assembly with integral reactant flow passages. Ballard Power Systems, McAndrews Held & Malloy, October 12, 1993: US05252410 (105 worldwide citation)

An electrochemical fuel cell is provided for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy. The fuel cell includes a membrane electrode assembly interposed between two separator layers. The separator layers are formed of thin elec ...


2
Kirk B Washington, David P Wilkinson, Henry H Voss: Laminated fluid flow field assembly for electrochemical fuel cells. Ballard Power Systems, McAndrews Held & Malloy, April 5, 1994: US05300370 (104 worldwide citation)

A laminated fluid flow field assembly for an electrochemical fuel cell comprises a separator layer and a stencil layer. The separator layer is formed of electrically conductive, substantially fluid impermeable sheet material. The stencil layer is formed of electrically conductive sheet material, and ...


3
David P Wilkinson, Henry H Voss, David S Watkins, Keith B Prater: Solid polymer fuel cell systems incorporating water removal at the anode. Ballard Power Systems, McAndrews Held & Malloy, November 22, 1994: US05366818 (100 worldwide citation)

A solid polymer fuel cell electric power generation system removes a substantial portion of water accumulated at the cathode in the outlet fuel stream of the anode. The system permits the operation of a hydrogen/oxygen fuel cell in a dead-ended mode where substantially pure oxygen is employed as the ...


4
Gustav Boehm, David P Wilkinson, Shanna Knights, Reinhold Schamm, Nicholas J Fletcher: Method and apparatus for operating a fuel cell. Ballard Power Systems, McAndrews Held & Malloy, October 8, 2002: US06461751 (77 worldwide citation)

The present invention relates to improving the overall efficiency of a fuel cell system by reducing parasitic power consumption. A controller is programmed to decrease oxidant stoichiometry until oxidant starvation is detected or until oxidant stoichiometry is about one. When oxidant starvation is d ...


5
Nicholas J Fletcher, Gordon J Lamont, Vesna Basura, Henry H Voss, David P Wilkinson: Electrochemical fuel cell employing ambient air as the oxidant and coolant. Ballard Power Systems, McAndrews Held & Malloy, November 28, 1995: US05470671 (68 worldwide citation)

An electrochemical fuel cell assembly includes a membrane electrode assembly which comprises an anode, a cathode having a surface thereof exposed to ambient air, and an ion exchange membrane interposed between the anode and the cathode. A seal forms a gas-impermeable barrier around the anode to whic ...


6
David P Wilkinson, Jeffery R Dahn: Electrolyte solution sequestering agents for electrochemical cells having carbonaceous electrodes. Her Majesty the Queen in right of the Provence of British Columbia, July 14, 1992: US05130211 (61 worldwide citation)

A secondary electrochemical cell including a first electrode and a counteectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of the electrodes and an electrolyte solution containing an organic solvent, a salt of the alkali metal and at least ...


7
David P Wilkinson, Henry H Voss, Nicholas J Fletcher, Mark C Johnson, Eric G Pow: Electrochemical fuel cell stack with concurrent flow of coolant and oxidant streams and countercurrent flow of fuel and oxidant streams. Ballard Power Systems, McAndrews Held & Malloy, June 30, 1998: US05773160 (55 worldwide citation)

A fuel cell assembly within an electrochemical fuel cell stack has an anode layer and a cathode layer. A cooling layer is disposed adjacent the fuel cell assembly. Each layer comprises channels for directing a fluid stream from an inlet to a an outlet. The coolant stream channels extend such that, i ...


8
David P Wilkinson, Mark C Johnson, Kevin M Colbow, Stephen A Campbell: Method and apparatus for reducing reactant crossover in an electrochemical fuel cell. Ballard Power Systems, McAndrews Held & Malloy, September 30, 1997: US05672439 (52 worldwide citation)

In an electrochemical fuel cell, a sufficient quantity of catalyst, effective for promoting the reaction of reactant supplied to an electrode, is disposed within the volume of the electrode so that a reactant introduced at a first major surface of the electrode is substantially completely reacted up ...


9
David P Wilkinson, Henry H Voss, James Dudley, Gordon J Lamont, Vesna Basura: Electrochemical fuel cell assembly with integral selective oxidizer. Ballard Power Systems, McAndrews Held & Malloy, January 9, 1996: US05482680 (45 worldwide citation)

A method and apparatus selectively oxidizes, within the fuel cell assembly, the carbon monoxide present in a fuel stream fed to the assembly. A quantity of catalyst is contained within at least a portion of a fuel stream passageway within the stack. The carbon monoxide is selectively oxidized by the ...


10
David P Wilkinson, Gordon J Lamont, Henry H Voss, Clemens Schwab: Method of fabricating an embossed fluid flow field plate. Ballard Power Systems, Daimler Benz, McAndrews Held & Malloy, June 18, 1996: US05527363 (44 worldwide citation)

An embossed fluid flow field plate for electrochemical cells comprises two sheets of compressible, electrically conductive material. Each sheet has two oppositely facing major surfaces. At least one of the major surfaces has an embossed surface which has a fluid inlet formed therein. The embossed su ...