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:
Dec. 02, 2008
Filed:
Mar. 05, 2002
Yoshinori Wariishi, Utsunomiya, JP;
Naoyuki Enjoji, Utsunomiya, JP;
Hideaki Kikuchi, Tochigi-ken, JP;
Narutoshi Sugita, Utsunomiya, JP;
Masaharu Suzuki, Utsunomiya, JP;
Seiji Sugiura, Utsunomiya, JP;
Yoshinori Wariishi, Utsunomiya, JP;
Naoyuki Enjoji, Utsunomiya, JP;
Hideaki Kikuchi, Tochigi-ken, JP;
Narutoshi Sugita, Utsunomiya, JP;
Masaharu Suzuki, Utsunomiya, JP;
Seiji Sugiura, Utsunomiya, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A fuel cell stack () includes a first sub-stack (), a second sub-stack (), and a third sub-stack () disposed in the flow direction of an oxidizing gas. An intermediate plate () is interposed between the first and second sub-stacks (), and an intermediate plate () is interposed between the second and third sub-stacks (). In this fuel stack (), the flow of an oxidizing gas is set such that the oxidizing gas flows in series in the direction from the first sub-stack () to the third sub-stack (). Between the sub-stacks additional oxidizing gas supplies () are provided through which oxidizing gas of lower humidity than the humidity of the oxidizing gas entering the first sub-stack is supplied. This arrangement allows an efficient management of the humidity water content of the oxidizing gas with sufficient moisturizing of the solid polymer membrane whilst avoiding excessive condensation of water vapour within the stack.