Patents Assigned to IRD Fuel Cells A/S
  • Method and system for stable direct methanol fuel cell operation at varying loads and sub-zero temperatures
    Patent number: 9350032
    Abstract: Methods and systems for operation of direct methanol fuel cell (DFMC) systems with enhanced flexibility within a wide range of electrical loads as well as no external load are provided. With these methods and systems, the fuel cell operates at low power in a non shut-down state in a fully controlled manner thus allowing the fuel cell to withstand frost conditions and to maintain optimal ancillary battery capacity.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: May 24, 2016
    Assignee: IRD FUEL CELLS A/S
    Inventors: Visti Andresen, Jacob Lindner Bonde, Joergen S. Lundsgaard, Madeleine Odgaard
  • Methods and systems for determining and controlling fuel concentrations in fuel cells
    Patent number: 8617767
    Abstract: Methods and systems for electrical determination and adjustment of the fuel concentration in direct methanol fuel cells (DMFC) are provided.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: December 31, 2013
    Assignee: IRD Fuel Cells A/S
    Inventors: Madeleine Odgaard, Steen Yde-Andersen, Joergen Sehjerning Lundsgaard
  • Modified fuel cells with internal humidification and/or temperature control systems
    Patent number: 7727660
    Abstract: Modified fuel cells with improved distribution of humidity and/or temperature are provided.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: June 1, 2010
    Assignee: IRD Fuel Cells A/S
    Inventors: Henning Frederiksen, Steen Yde-Andersen, Laila Grahl-Madsen, Joergen Schjerning Lundsgaard
  • Dual function, bipolar separator plates for fuel cells
    Patent number: 7615308
    Abstract: Dual function, bipolar separator plates are provided for use in fuel cells. These separator plates contain both a cathodic flow field and an anodic flow field in a single separator plate.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: November 10, 2009
    Assignee: IRD Fuel Cells A/S
    Inventors: Henning Frederiksen, Steen Yde-Andersen, Laila Grahl-Madsen, Joergen Schjerning Lundsgaard
  • Fuel-cell reactant delivery and circulation device
    Patent number: 7255948
    Abstract: Fuel cells equipped with a self-contained gas- or air-lift which circulates fuel through the channels of the separator plate of the fuel cell via gaseous carbon dioxide produced by the reaction of the membrane electrode assembly and the fuel are provided. Also provided are exemplary self-contained gas-or air-lifts useful for production of these fuel cells.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: August 14, 2007
    Assignee: IRD Fuel Cells A/S
    Inventors: Jorgen Schjerning Lundsgaard, John Kaas, Madeleine Odgaard, David M. Thomas
  • Interlocking isolator for fuel cells
    Patent number: 6916572
    Abstract: An interlocking isolator for a proton exchange membrane fuel cell is provided which protects a fuel cell positioned in the interlocking isolator from electricity and heat. The interlocking isolator also permits multiple fuel cells positioned with the isolators to be stacked adjacently, thereby forming fuel cell stacks.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: July 12, 2005
    Assignee: IRD Fuel Cells A/S
    Inventors: Jorgen Schjerning Lundsgaard, Henning Frederiksen
  • Membrane electrode assemblies for direct methanol fuel cells and methods for their production
    Patent number: 6800391
    Abstract: A method of producing a membrane electrode assembly for use in direct methanol fuel cells by serigraphically printing cathode catalysts or anode catalysts with a carbon backing layer onto graphite or carbon paper, boiling impurities from these layers, and bonding the boiled, printed cathode and anode catalyst layers onto opposite sides of a polymer electrolyte membrane via semi-isostatic compression in a constraint which restricts volume and lateral defamation is provided. Also provided are membrane electrode assemblies produced in accordance with this method.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: October 5, 2004
    Assignee: IRD Fuel Cell A/S
    Inventors: Madeline Odgaard, Steen Yde-Andersen