US 12,469,858 B2
Method for producing a multi-layer bipolar plate for an electrochemical device and bipolar plate for an electrochemical device
Peter Stahl, Metzingen (DE); and Juergen Kraft, Metzingen (DE)
Assigned to EKPO Fuel Cell Technologies GmbH, Dettingen (DE)
Filed by EKPO Fuel Cell Technologies GmbH, Dettingen (DE)
Filed on Jun. 22, 2022, as Appl. No. 17/846,801.
Application 17/846,801 is a continuation of application No. PCT/EP2020/085117, filed on Dec. 8, 2020.
Claims priority of application No. 10 2019 135 785.3 (DE), filed on Dec. 23, 2019.
Prior Publication US 2022/0320533 A1, Oct. 6, 2022
Int. Cl. H01M 8/0273 (2016.01); H01M 8/0206 (2016.01); H01M 8/0258 (2016.01); H01M 8/0297 (2016.01); H01M 8/2418 (2016.01)
CPC H01M 8/0273 (2013.01) [H01M 8/0206 (2013.01); H01M 8/0258 (2013.01); H01M 8/0297 (2013.01); H01M 8/2418 (2016.02)] 14 Claims
OG exemplary drawing
 
1. A method for producing a multi-layer bipolar plate for an electrochemical device, comprising the following:
producing at least one sealing element made of an elastic material on a first bipolar plate layer of the bipolar plate;
connecting the first bipolar plate layer of the bipolar plate with the sealing element produced thereon and a second bipolar plate layer of the bipolar plate by welding by means of a welding energy source along at least one connection welding seam;
wherein
during the welding operation, the second bipolar plate layer faces toward the welding energy source and wherein during the welding operation, a weld pool produced by means of the welding energy source does not completely penetrate the first bipolar plate layer.