US 12,469,867 B2
Method for regulating the platinum oxide fraction in a fuel cell, and fuel cell system for a motor vehicle
Markus Ruf, Waldstetten (DE); and Hannah Staub, Karlsdorf-Neuthard (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 17/999,339
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Oct. 4, 2021, PCT No. PCT/EP2021/077307
§ 371(c)(1), (2) Date Nov. 18, 2022,
PCT Pub. No. WO2022/073938, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 10 2020 126 191.8 (DE), filed on Oct. 7, 2020.
Prior Publication US 2024/0243316 A1, Jul. 18, 2024
Int. Cl. H01M 8/04 (2016.01); H01M 8/04082 (2016.01); H01M 8/04119 (2016.01); H01M 8/04298 (2016.01); H01M 8/0444 (2016.01); H01M 8/04537 (2016.01); H01M 8/04746 (2016.01); H01M 8/04791 (2016.01); H01M 8/04828 (2016.01); H01M 8/04858 (2016.01); H01M 8/043 (2016.01)
CPC H01M 8/04791 (2013.01) [H01M 8/04126 (2013.01); H01M 8/04201 (2013.01); H01M 8/04305 (2013.01); H01M 8/0444 (2013.01); H01M 8/04544 (2013.01); H01M 8/04753 (2013.01); H01M 8/04835 (2013.01); H01M 8/04865 (2013.01); H01M 8/04947 (2013.01); H01M 8/043 (2016.02); H01M 2250/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for regulating a platinum oxide fraction in a catalyst layer of a fuel cell of a fuel cell stack for a motor vehicle, comprising:
model-based determination of a present fraction of platinum oxide in dependence on a present operating state;
determination of an electrical potential and/or a change in potential in dependence on the present fraction of platinum oxide; and
adapting the fraction of platinum oxide in dependence on an anticipated and/or demanded operating state of the fuel cell and/or of the vehicle,
wherein the fraction of platinum oxide is increased or at least maintained by reduction of the power put out by the fuel cell or the fuel cell stack while at the same time increasing the power put out by a battery.