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. 08, 2011
Filed:
Feb. 25, 2005
Dieter Grafl, Ulm, DE;
Raimund Stroebel, Ulm, DE;
Lothar Quick, Nersingen, DE;
Joachim Scherer, Ulm, DE;
Christian Schleier, Günzburg, DE;
Bernd Gaugler, Ulm, DE;
Dieter Grafl, Ulm, DE;
Raimund Stroebel, Ulm, DE;
Lothar Quick, Nersingen, DE;
Joachim Scherer, Ulm, DE;
Christian Schleier, Günzburg, DE;
Bernd Gaugler, Ulm, DE;
Reinz-Dichtungs-GmbH, Neu-Ulm, DE;
Abstract
The present invention relates to a contact plate for fuel cells with a coherent active area () on at least one side of the contact plate, wherein the active area () consists of a contact surface () which over the whole surface comprises a coating () of an electrically conductive, corrosion-resistant material, and of recesses () so that the recesses () form a channel structure, wherein the coating () furthermore at least in the bottom regions () of the recesses () is omitted. The invention further relates to a corresponding fuel cell or to a fuel cell stack with at least one such contact plate as well as to various methods for manufacturing such contact plates which may serve as bipolar plates as well as monopolar plates or end plates. With the contact plate according to the invention, one achieves an optimally reduced contact resistance with a minimal material expense for the coating ().