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. 25, 2008
Filed:
Feb. 24, 2005
Maximilian Danzer, Scheyern, DE;
Franz-josef Wetzel, Gernlinden, DE;
Xiaofeng Yan, Leonberg-Warmbronn, DE;
Thomas Hoefler, Munich, DE;
Bernd Kuhn, Echterdingen, DE;
Andreas Oswald Stoermer, Tuntenhausen, DE;
Olav Finkenwirth, Munich, DE;
Maximilian Danzer, Scheyern, DE;
Franz-Josef Wetzel, Gernlinden, DE;
Xiaofeng Yan, Leonberg-Warmbronn, DE;
Thomas Hoefler, Munich, DE;
Bernd Kuhn, Echterdingen, DE;
Andreas Oswald Stoermer, Tuntenhausen, DE;
Olav Finkenwirth, Munich, DE;
Bayerische Motoren Werke Aktiengesellscaft, Munich, DE;
Abstract
The invention relates to a fuel cell stack which is composed of several individual fuel cells that are stacked on top of each other. Each of said fuel cells comprises a cathode-electrolyte-anode unit () and a perforated film () which distributes a combustible gas across the first electrode surface thereof, supports the cathode-electrolyte-anode unit (), and is combined into a cassette () that is provided with a hollow space along with an additional structure (). The combustible gas reaches the first electrode (A) via said cassette (). The side of each cassette (), which is located opposite the cathode-electrolyte-anode unit (), is provide with a structure for distributing atmospheric oxygen across the surface of the second electrode of a neighboring cassette such that the stack is formed by several superimposed cassettes (), between the film () of which a cathode-electrolyte-anode unit () and the structure for distributing atmospheric oxygen across the surface of the second electrode are disposed along with the additional structure (). In order to brace the individual cassettes against each other in a housing or similar, the inventive stack comprises at least one bracing cassette, the walls of which are impermeable and which is filled with a material that expands to a relatively great extent when being heated.