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:
Feb. 18, 2014
Filed:
Feb. 25, 2009
Matthias Gottmann, Sunnyvale, CA (US);
Patrick Muhl, Mountain View, CA (US);
Chad Pearson, Mountain View, CA (US);
James Daniel Smith, Sunnyvale, CA (US);
Matthias Gottmann, Sunnyvale, CA (US);
Patrick Muhl, Mountain View, CA (US);
Chad Pearson, Mountain View, CA (US);
James Daniel Smith, Sunnyvale, CA (US);
Bloom Energy Corporation, Sunnyvale, CA (US);
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.