The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Sep. 16, 2002
Ryan J. Balliet, West Hartford, CT (US);
Carl A. Reiser, Stonington, CT (US);
Ryan J. Balliet, West Hartford, CT (US);
Carl A. Reiser, Stonington, CT (US);
UTC Fuel Cells, LLC, South Windsor, CT (US);
Abstract
The invention is a system () and method for determining a gas composition within a fuel cell () of a shut down fuel cell power plant. The system () includes at least one fuel cell (), a sensor circuit () secured in electrical connection with the fuel cell (), wherein the circuit () includes a power source (), a voltage-measuring device (), and a sensor circuit switch (). The circuit () is secured so that the power source () may selectively deliver a pre-determined sensing current to the fuel cell () for a pre-determined sensing duration. The system () selectively admits the reducing fluid into an anode flow field () of the cell () whenever the sensor circuit () senses that a shut down monitoring voltage of the fuel cell () is the same as or exceeds a calibrated sensor voltage limit of the fuel cell ().