Bipolar plate for a fuel cell and fuel cell stack

US9088011B2 · kind B2 · utility

Assignee

• ThyssenKrupp Steel Europe AG · DE

Inventors

• Stefan Wischmann · Berlin, DE
• Horst Walter Tamler · Witten, DE
• Roland Wunderlich · Bergkamen, DE
• Michael Steinhorst · Essen, DE
• Krasimir Nikolov · Dortmund, DE
• Nicole Weiher · Bochum, DE
• Jens Becker · Ludwigshafen am Rhein, DE
• Stefan Peter Puls · Dortmund, DE
• Bernd Schuhmacher · Dortmund, DE

Key dates

• Filing date: Jul 3, 2008
• Grant date: Jul 21, 2015
• Expiry date: May 14, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A bipolar plate which can be produced particularly economically for a fuel cell, with which a high degree of efficiency is guaranteed over a long service life. The bipolar plate has a core layer consisting of a steel material, the surfaces of said core layer, which are associated with the respective electrolyte carriers of the fuel cell, having a corrosion protection layer, protecting the core layer against corrosion. The corrosion protection layers consist of a metal material and extend on both sides over the whole surface of the core layer. At the same time the corrosion protection layers are in turn coated over the whole surface with an electrically conductive functional coating, which is essentially entirely impermeable for the metal ions emerging from the core layer and/or the corrosion protection layers. The invention likewise relates to at least one fuel cell comprising a bipolar plate according to the invention.