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. 09, 2014
Filed:
May. 17, 2011
Kwi Seong Jeong, Gyeonggi-do, KR;
Seung Chan OH, Gyeonggi-do, KR;
Young Bum Kum, Seoul, KR;
Sae Hoon Kim, Gyeonggi-do, KR;
Jung DO Suh, Seoul, KR;
Duck Whan Kim, Seoul, KR;
Young Hyun Lee, Seoul, KR;
Seung Ryeol Yoo, Chungcheongnam-do, KR;
Myung Ju Jung, Daejeon, KR;
Jong Guen Yoon, Chungcheongnam-do, KR;
Kwi Seong Jeong, Gyeonggi-do, KR;
Seung Chan Oh, Gyeonggi-do, KR;
Young Bum Kum, Seoul, KR;
Sae Hoon Kim, Gyeonggi-do, KR;
Jung Do Suh, Seoul, KR;
Duck Whan Kim, Seoul, KR;
Young Hyun Lee, Seoul, KR;
Seung Ryeol Yoo, Chungcheongnam-do, KR;
Myung Ju Jung, Daejeon, KR;
Jong Guen Yoon, Chungcheongnam-do, KR;
Hyundai Motor Company, Seoul, KR;
Kangnam University Industry-Academia Cooperation Foundation, Yongin, Gyeonggi-Do, KR;
Abstract
A technique is described herein for monitoring the operational state of a fuel cell stack by the detection of nonlinearity in such a manner that an external test signal for frequency response is generated and applied to the fuel cell stack during operation, the resulting signal output from the fuel cell stack is measured, and the harmonic content of the measured signal is analyzed, the method including: applying a multiple frequency test signal comprising at least two sinusoidal waves as the test signal for frequency response to the fuel cell stack; and analyzing the resulting current or voltage signal output from the fuel cell stack.