The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
Jan. 10, 2022
Audi Ag, Ingolstadt, DE;
AUDI AG, Ingolstadt, DE;
Abstract
A method for operating a fuel cell device comprising a fuel cell stack having at least one fuel cell, involving the steps; a) drying of the fuel cell stack upon switching off the fuel cell device; b) determining the membrane residual water and the cathode residual water by means of electrochemical impedance spectroscopy when restarting the fuel cell device; c) using a cell voltage monitoring unit to identify the wettest cathode in one of the fuel cells; d) model-based determination of the water transport from the wettest cathode to the anode and thus the anode moisture in the fuel cell device; and; e) adjusting the electric current and the fuel volume flow in dependence on the anode moisture. A fuel cell device and a motor vehicle having a fuel cell device is also provided.