US 12,463,228 B2
Method for a frost start of a fuel cell device, fuel cell device and motor vehicle having a fuel cell device
Oliver Keitsch, Heilbronn (DE); Armin Siebel, Neckarsulm (DE); and Sebastian Voigt, Heilbronn (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 18/004,434
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Oct. 25, 2021, PCT No. PCT/EP2021/079466
§ 371(c)(1), (2) Date Jan. 5, 2023,
PCT Pub. No. WO2022/090121, PCT Pub. Date May 5, 2022.
Claims priority of application No. 10 2020 128 273.7 (DE), filed on Oct. 28, 2020.
Prior Publication US 2023/0299321 A1, Sep. 21, 2023
Int. Cl. H01M 8/04 (2016.01); H01M 8/0267 (2016.01); H01M 8/04302 (2016.01); H01M 8/248 (2016.01)
CPC H01M 8/04302 (2016.02) [H01M 8/0267 (2013.01); H01M 8/248 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for a frost start of a fuel cell device having a fuel cell stack, in which a plurality of fuel cells electrically switched in series is pressed by a compression force of a clamping device between two end plates, and having a controller which is adapted to carry out the method for the frost start of the fuel cell device, the method comprising:
determining the presence of frost start conditions,
reducing the compression force using the clamping device, and
operating the fuel cells in a frost start operation, in which a compression force acting on the fuel cells of the fuel cell stack and reduced as compared to that of a normal operation is maintained.