US 11,923,570 B2
Assembly for an electrochemical device and method for producing such an assembly
Peter Stahl, Metzingen (DE); Oliver Fink, Metzingen (DE); Karsten Dahl, Owen (DE); and Juergen Kraft, Metzingen (DE)
Assigned to EKPO FUEL CELL TECHNOLOGIES GMBH, Dettingen (DE)
Filed by ElringKlinger AG, Dettingen (DE)
Filed on Dec. 31, 2020, as Appl. No. 17/139,463.
Application 17/139,463 is a continuation of application No. PCT/EP2019/067363, filed on Jun. 28, 2019.
Claims priority of application No. 10 2018 115 994.3 (DE), filed on Jul. 2, 2018.
Prior Publication US 2021/0135254 A1, May 6, 2021
Int. Cl. H01M 8/0276 (2016.01); H01M 8/0286 (2016.01)
CPC H01M 8/0276 (2013.01) [H01M 8/0286 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An assembly for an electrochemical device, comprising at least one gas diffusion layer and at least one sealing element produced on the gas diffusion layer,
wherein the sealing element comprises an inner sealing region fixed to the gas diffusion layer and an outer sealing region connected to the gas diffusion layer via the inner sealing region,
wherein the inner sealing region has a flow field sealing line, which extends around the gas diffusion layer,
wherein the outer sealing region has at least one medium channel sealing line, which extends around a medium through-opening of the sealing element,
wherein the sealing element comprises at least one relief region, which is arranged between the flow field sealing line of the inner sealing region and the at least one medium channel sealing line of the outer sealing region and
a) comprises a relief opening extending through the sealing element
and/or
b) has a smallest height, which is smaller than one fourth of the greatest height of the inner sealing region and is smaller than one fourth of the greatest height of the outer sealing region;
wherein the sealing element comprises a plurality of relief regions, which follow one another along a peripheral direction of the gas diffusion layer.