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:
Nov. 24, 2009
Filed:
Jun. 15, 2005
Tsuyoshi Kanai, Tokyo, JP;
Go Sudo, Kanagawa, JP;
Tsuyoshi Kanai, Tokyo, JP;
Go Sudo, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides a system in which a fuel cell can be operated using a fuel having a constantly optimum concentration and the time taken to start the fuel cell is shortened. A low-concentration fuel for performing a power generation reaction and a high-concentration fuel for performing the power generation reaction and a reaction for raising the temperature of a power generation cell are stored respectively in separate storage vessels. The fuel supplied to a negative electrode can be instantaneously changed over according to the temperature of the power generation cell. This makes it possible to perform an operation at a constantly optimum fuel concentration. By having the capability to raise the power generation cell temperature in a short time, it is possible to reduce the capacity of an auxiliary battery used when power generation cell temperature is low, and to reduce the fuel cell system in size.