US 9,812,716 B2
Sealing assembly for a fuel cell stack having a coated metallic sheet intermediate element
Hans-Rainer Zerfass, Taunusstein (DE); Armin Diez, Lenningen (DE); Peter Schenk, Hohenstein (DE); Wolfgang Fritz, Metzingen (DE); Peter Lamp, Kaufering (DE); Manfred Wier, Munich (DE); and Joachim Tachtler, Ismaning (DE)
Assigned to ElringKlinger AG, Dettingen (DE)
Filed by ElringKlinger AG, Dettingen (DE)
Filed on Jan. 22, 2014, as Appl. No. 13/999,163.
Application 13/999,163 is a division of application No. 12/804,961, filed on Aug. 3, 2010, granted, now 8,663,864.
Application 12/804,961 is a division of application No. 11/239,187, filed on Sep. 29, 2005, abandoned.
Claims priority of application No. 10 2004 047 539 (DE), filed on Sep. 30, 2004.
Prior Publication US 2014/0147767 A1, May 29, 2014
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 2/20 (2006.01); H01M 8/0271 (2016.01); H01M 8/0273 (2016.01); H01M 8/0282 (2016.01); H01M 8/0286 (2016.01); H01M 8/0297 (2016.01); H01M 8/12 (2016.01); H01M 8/242 (2016.01); H01M 8/24 (2016.01)
CPC H01M 8/0271 (2013.01) [H01M 8/0273 (2013.01); H01M 8/0282 (2013.01); H01M 8/0286 (2013.01); H01M 8/0297 (2013.01); H01M 8/12 (2013.01); H01M 8/242 (2013.01); H01M 8/24 (2013.01); Y02P 70/56 (2015.11)] 18 Claims
OG exemplary drawing
 
1. A fuel cell stack comprising a first fuel cell unit and a second fuel cell unit, which are arranged consecutively in a stacking direction, wherein each of said first and second fuel cell units comprises a respective housing with a respective housing upper part that is provided with at least one of a first fuel gas feed opening and a first oxidising agent feed opening, a respective housing lower part that is provided with at least one of a second fuel gas feed opening and a second oxidising agent feed opening, and a respective intermediate element made from a metallic sheet,
wherein a respective electrically insulating coating is arranged between the respective housing lower part and the respective intermediate element and
wherein the intermediate element of the first fuel cell unit is distinct from the housing lower parts and from the housing upper parts of the first and second fuel cell units and is secured welded and/or soldered to form a connection to the housing upper part of the second fuel cell unit which is solid during operation of the fuel cell stack, and wherein the intermediate element of the first fuel cell unit is soldered to the housing lower part of the first fuel cell unit by means of a solder which is solid at a temperature in the range of about 800° C. to about 900° C.