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:
Jul. 23, 2013
Filed:
Aug. 09, 2007
Takahiro Kaito, Yokosuka, JP;
Takahiro Kaito, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Abstract
A fuel cell system includes a fuel cell stack A cell voltage detector detects a cell voltage at a cathode outlet-side of a single cell. A total voltage detector detects a total voltage of the fuel cell stack. A cell voltage difference computing unit determines an average cell voltage and a minimum cell voltage and computes a difference A stack current detector detects electric current. An anode outlet local current detector detects a local current. A current density-computing unit computes a stack current density and an anode outlet local current density. A wet state-judging unit judges a wet state of the fuel cell stack based on the difference between the average cell voltage and the minimum cell voltage, and based on the difference between the stack current density and the anode outlet local current density.