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:
Apr. 13, 2010
Filed:
Oct. 06, 2005
Masahiro Komachiya, Hitachinaka, JP;
Hiroshi Yamauchi, Hitachi, JP;
Katsunori Nishimura, Hitachiota, JP;
Kou Takahashi, Hitachi, JP;
Yoshinari Hori, Hitachinaka, JP;
Yoshihide Kondo, Ondo, JP;
Masahiro Komachiya, Hitachinaka, JP;
Hiroshi Yamauchi, Hitachi, JP;
Katsunori Nishimura, Hitachiota, JP;
Kou Takahashi, Hitachi, JP;
Yoshinari Hori, Hitachinaka, JP;
Yoshihide Kondo, Ondo, JP;
Hitachi, Ltd., , JP;
Abstract
A part of cell stack portions constituting a part of a fuel cell stack is used as a voltage detection portion, the size of a frequency component belonging to a predetermined specific frequency range is extracted from a voltage signal detected and the existence/absence of abnormality of a fuel cell system is diagnosed on the basis of the frequency component extracted.