US 12,278,405 B2
Fuel cell stack and bipolar plate assembly
Johan Flink, Gothenburg (SE); Bernd Gaugler, Ulm (DE); and Claudia Kunz, Ulm (DE)
Assigned to POWERCELL SWEDEN AB, Gothenburg (SE); and Reinz-Dichtungs-GmbH, Neu-Ulm (DE)
Appl. No. 16/489,019
Filed by POWERCELL SWEDEN AB, Gothenburg (SE); and Reinz-Dichtungs-GmbH, Neu-Ulm (DE)
PCT Filed Feb. 23, 2018, PCT No. PCT/SE2018/050177
§ 371(c)(1), (2) Date Aug. 27, 2019,
PCT Pub. No. WO2018/164624, PCT Pub. Date Sep. 13, 2018.
Claims priority of application No. 1750252-7 (SE), filed on Mar. 7, 2017.
Prior Publication US 2020/0006791 A1, Jan. 2, 2020
Int. Cl. H01M 8/0297 (2016.01); H01M 8/0267 (2016.01); H01M 8/1004 (2016.01); H01M 8/2484 (2016.01)
CPC H01M 8/0297 (2013.01) [H01M 8/0267 (2013.01); H01M 8/1004 (2013.01); H01M 8/2484 (2016.02)] 9 Claims
OG exemplary drawing
 
1. Bipolar plate assembly for a fuel cell or a fuel cell stack having at least a first flow field plate and a second flow field plate,
each of the first flow field plate and the second flow field plate comprising first and second sides parallel to a main plane of the bipolar plate assembly and separated by a peripheral edge extending from the first side to the second side, the peripheral edge of the first flow field plate and the peripheral edge of the second flow field plate being perpendicular to the main plane,
wherein one of the first and second sides of the first flow field plate and one of the first and second sides of the second flow field plate face each other and are fastened to each other, and both the first flow field plate and the second flow field plate have a reactant flow field at one side and a cooling fluid flow field on another side, wherein, in the bipolar plate assembly, the cooling fluid flow field of the first flow field plate and the cooling fluid flow field of the second flow field plate face each other, and the reactant flow field of the first flow field plate and the reactant flow field of the second flow field plate are arranged at outside surfaces of the bipolar plate assembly,
wherein the bipolar plate assembly comprises a first area and a second area,
the first area comprises the peripheral edge of the first flow field plate being flush with the peripheral edge of the second flow field plate,
the second area comprises the peripheral edge of the first flow field plate being recessed from the peripheral edge of the second flow field plate, and
the second area further comprises the peripheral edge of the first flow field plate and the peripheral edge of the second flow field plate both being recessed relative to the peripheral edge of the first flow field plate and the peripheral edge of the second flow field plate in the first area, when viewed into the main plane.