Patents by Inventor Patrick Muhl

Patrick Muhl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of controlling a fuel cell system using impedance determination
    Patent number: 9190681
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: November 17, 2015
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Matthias Gottmann, Patrick Muhl, Chad Pearson, James Daniel Smith
  • FUEL CELL MONITORING AND CONTROL SYSTEM
    Publication number: 20150162632
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Application
    Filed: February 20, 2015
    Publication date: June 11, 2015
    Inventors: Matthias Gottmann, Patrick Muhl, Chad Pearson, James Daniel Smith
  • Method of controlling a fuel cell system using impedance determination
    Patent number: 8986900
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: March 24, 2015
    Assignee: Bloom Energy Corporation
    Inventors: Matthias Gottmann, Patrick Muhl, Chad Pearson, James Daniel Smith
  • FUEL CELL MONITORING AND CONTROL SYSTEM
    Publication number: 20140093802
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Application
    Filed: December 4, 2013
    Publication date: April 3, 2014
    Applicant: Bloom Energy Corporation
    Inventors: Matthias Gottmann, Patrick Muhl, Chad Pearson, James Daniel Smith
  • Controlling a fuel cell system based on fuel cell impedance characteristic
    Patent number: 8652697
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: February 18, 2014
    Assignee: Bloom Energy Corporation
    Inventors: Matthias Gottmann, Patrick Muhl, Chad Pearson, James Daniel Smith
  • Fuel cell monitoring and control system
    Publication number: 20100216043
    Abstract: A method of controlling a fuel cell system includes applying alternating current (AC) signals to an individual fuel cell. The AC signals have a plurality of different frequencies. A voltage across the individual fuel cell is determined at each of the plurality of different frequencies. An impedance characteristic of the individual fuel cell is determined based at least in part on the voltage across the individual fuel cell at each of the plurality of different frequencies. The individual fuel cell is controlled based at least in part on the impedance characteristic.
    Type: Application
    Filed: February 25, 2009
    Publication date: August 26, 2010
    Inventors: Matthias Gottmann, David McKenzie, Patrick Muhl, Chad Pearson, James Daniel Smith