Patents by Inventor Ross W. Johnston Bailey

Ross W. Johnston Bailey 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, apparatus and article to test fuel cells
    Patent number: 6798221
    Abstract: A fuel cell resistance test system includes a contact head having a plurality of spaced electrical contacts for contacting multiple ones of the fuel cells composing the stack. In one embodiment, a plurality of selectively actuable switches produce a short between respective pairs of adjacent ones of the electrical contacts. A processor opens each of the switches, one at a time in succession, to apply a defined voltage from a voltage source, successively across pairs of adjacent ones of the electrical contacts. A current sensor measures a resulting current and the processor or other computer determines whether a short exists based on the magnitude of the defined voltage and the magnitude of the resulting current. Alternatively, the test system may include a current source and a voltage sensor.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: September 28, 2004
    Assignee: Ballard Power Systems Inc.
    Inventors: Zhaoyu Wang, Ross W. Johnston Bailey, Graham E. Hill, Hong The Nguyen
  • Method, apparatus and article to test fuel cells
    Publication number: 20030076110
    Abstract: A fuel cell resistance test system includes a contact head having a plurality of spaced electrical contacts for contacting multiple ones of the fuel cells composing the stack. In one embodiment, a plurality of selectively actuable switches produce a short between respective pairs of adjacent ones of the electrical contacts. A processor opens each of the switches, one at a time in succession, to apply a defined voltage from a voltage source, successively across pairs of adjacent ones of the electrical contacts. A current sensor measures a resulting current and the processor or other computer determines whether a short exists based on the magnitude of the defined voltage and the magnitude of the resulting current. Alternatively, the test system may include a current source and a voltage sensor.
    Type: Application
    Filed: February 14, 2002
    Publication date: April 24, 2003
    Applicant: Ballard Power Systems Inc.
    Inventors: Zhaoyu Wang, Ross W. Johnston Bailey, Graham E. Hill, Hong The Nguyen