1
Richard F Buswell, Joseph V Clausi, Ronald Cohen, Craig Louie, David S Watkins: Hydrocarbon fueled solid polymer fuel cell electric power generation system. Ballard Power Systems, McAndrews Held & Malloy, November 1, 1994: US05360679 (137 worldwide citation)

A power plant system produces utility grade electrical AC power from gaseous or liquid hydrocarbon fuels using a fuel cell stack employing ion exchange membranes. The fuel is desulfurized, mixed with water, heated and vaporized before being introduced into a reformer. The reformer produces a hydroge ...


2
Vijay Bhavaraju, Kerry E Grand, Anil Tuladhar: Method and apparatus for determining a maximum power point of photovoltaic cells. Ballard Power Systems Corporation, August 14, 2007: US07256566 (128 worldwide citation)

The maximum power point (MPP) of a photovoltaic array that can be coupled to power inverter is determined. A capacitor on a DC-bus side of the inverter is used as a load from which I-V characteristics of the photovoltaic array can be generated. The photovoltaic array is connected to the capacitor, w ...


3
Robert D Merritt, Brian N Gorbell: Electrochemical fuel cell system with a regulated vacuum ejector for recirculation of the fluid fuel stream. Ballard Power Systems, McAndrews Held & Malloy, August 15, 1995: US05441821 (128 worldwide citation)

An electric power generation system has a regulated vacuum ejector for recirculating the fluid fuel stream. The system includes a fuel cell stack, a pressurized fuel supply having a pressure control valve for regulating the pressure of the fuel supply, a vacuum ejector interposed between the fuel su ...


4
Duo Deng, Anil Tuladhar, Kenneth J Farkas, Kerry E Grand: Method and apparatus for tracking maximum power point for inverters, for example, in photovoltaic applications. Ballard Power Systems Corporation, Seed IP Law Group PLLC, January 2, 2007: US07158395 (123 worldwide citation)

A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a power grid. The outer loop accommod ...


5
David S Watkins, Kenneth W Dircks, Danny G Epp, Robert D Merritt, Brian N Gorbell: Integrated fuel cell power generation system. Ballard Power Systems, McAndrews Held & Malloy, April 6, 1993: US05200278 (121 worldwide citation)

An integrated fuel cell power generation system comprises a fuel cell stack having a humidification section and an electrochemically active section. The humidification section imparts water vapor to an inlet hydrogen containing fuel stream and an inlet oxygen containing oxidant stream. The electroch ...


6
Robert D Merritt, James D Blair: Constant voltage fuel cell with improved reactant supply and control system. Ballard Power Systems, McAndrews Held & Malloy, November 22, 1994: US05366821 (111 worldwide citation)

A method and apparatus for providing a substantially constant output voltage from a fuel cell, notwithstanding output current variations, is disclosed. The voltage and secondarily the current of the cell is determined at least periodically. The pressure of the reactant gas in the fuel cell is then r ...


7
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 ...


8
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 ...


9
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 ...


10
Russell H Barton, Peter R Gibb, Joel A Ronne, Henry H Voss: Membrane electrode assembly for an electrochemical fuel cell and a method of making an improved membrane electrode assembly. Ballard Power Systems, McAndrews Held & Malloy, May 2, 2000: US06057054 (91 worldwide citation)

An improved membrane electrode assembly ("MEA") comprises coextensive ion exchange membrane and electrode layers and a resilient fluid impermeable integral seal made by impregnating a sealing material into the porous electrode layers in the sealing regions. The integral seal preferably circumscribes ...



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