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:
Oct. 08, 2002
Filed:
Jul. 31, 2000
Yixin Zeng, Kariya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A solid polymer electrolyte fuel cell having a coolant circulation circuit is made up of a coolant flow field plate having a surface opposed to a cell surface, an open faced coolant flow channel formed in a major region of the surface of the coolant flow field plate, the open-faced coolant flow channel being divided into a plurality of divisional passages in regional fashion, a coolant inlet port at one end of each of the divisional passages, and a coolant outlet port at the other end of each of the divisional passages. Thus, the major region is divided into the corresponding plurality of divisional regions which can be differentiated in temperature gradient, with the result that the coolant temperature gradient may be made non-linear, excessive local wetting and/or drying at electrodes can be restricted, and the inner resistance of the cell and the current density at the cell surface can be made uniform.