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:
Mar. 13, 2007
Filed:
Jul. 02, 2003
Keisuke Wakabayashi, Yokosuka, JP;
Yasukazu Iwasaki, Yokohama, JP;
Keisuke Wakabayashi, Yokosuka, JP;
Yasukazu Iwasaki, Yokohama, JP;
Nissan Motor Co., Ltd., Kanagawa-Ken, JP;
Abstract
A fuel cell system has a heater () for heating water in the fuel cell system; and a controller () for controlling the heater. The controller () executes a stop mode having the smaller energy consumption of a temperature maintenance mode where water in the fuel cell system is maintained to a temperature greater than freezing point in a period after a shutdown the fuel cell system until a scheduled start-up date-time and a defrost start-up mode where frozen water in the fuel cell system is melted when the fuel cell system undergoes a start-up operation. The controller () stores a historical external temperature data for a period prior to the shutdown of the fuel cell system. The historical external temperature data is used for predicting the external temperature for the scheduled start-up date-time. The controller () calculates the energy consumption in the defrost start-up mode based on the predicted external temperature.