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:
Jan. 02, 2024
Filed:
Jun. 20, 2018
Applicants:
Audi Ag, Ingolstadt, DE;
Volkswagen Ag, Wolfsburg, DE;
Inventors:
Assignees:
Volkswagen AG, Wolfsburg, DE;
Audi AG, Ingolstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01L 5/00 (2006.01); H01M 8/04313 (2016.01); G01L 5/04 (2006.01); H01M 8/248 (2016.01);
U.S. Cl.
CPC ...
H01M 8/04313 (2013.01); G01L 5/042 (2013.01); H01M 8/248 (2013.01); H01M 2220/20 (2013.01);
Abstract
The present invention relates to a method for determining the compressive tensile force acting on a fuel cell stack due to at least one tensioning element. Thereby, the compressive tensile force is the overall tensile force compressing the fuel cell stack. This is determined according to the invention by means of acoustic measurements on vibratable sections of the tensioning elements. The subject matter of the invention also includes a data processing program for carrying out the method according to the invention along with the use of a smartphone for carrying out the method according to the invention.