US 12,261,330 B2
Bipolar plate for a fuel cell, fuel cell having a bipolar plate
Juergen Hackenberg, Sachsenheim (DE); and Martina Bubrin, Stuttgart (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/782,220
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 23, 2020, PCT No. PCT/EP2020/083055
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/110454, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 10 2019 218 859.1 (DE), filed on Dec. 4, 2019.
Prior Publication US 2023/0024473 A1, Jan. 26, 2023
Int. Cl. H01M 8/0228 (2016.01); H01M 8/0208 (2016.01)
CPC H01M 8/0228 (2013.01) [H01M 8/0208 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A bipolar plate (1) for a fuel cell, the bipolar plate comprising a stainless steel bipolar plate substrate (2) and a coating (3) applied on the bipolar plate substrate (2) to increase a corrosion resistance of the bipolar plate (1),
wherein the coating (3) has a multilayer configuration and comprises at least one layer (4) of a metallic matrix (5) with nonpassivating dispersoid particles (6) incorporated therein, and a corrosion-resistant layer (7), wherein the corrosion-resistant layer (7) is disposed between the bipolar plate substrate (2) and the at least one layer (4), wherein the corrosion-resistant layer (7) has the same metallic matrix (5) as the at least one layer (4) and differs from the at least one layer (4) only in an absence of the dispersoid particles (6).