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:
Sep. 20, 2022
Filed:
Apr. 10, 2020
Volkswagen Ag, Wolfsburg, DE;
Gerd Wuebbeler, Berlin, DE;
Rainer Fuessler, Braunschweig, DE;
Clemens Elster, Berlin, DE;
Steffen Seitz, Wendeburg, DE;
Martin Wuensch, Braunschweig, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
A method for determining an ageing parameter Kof a rechargeable battery, especially a lithium rechargeable battery, featuring the steps (a) detecting an impedance Z of the rechargeable battery at different frequencies f, so that a Nyquist plot and a real part path, which plots a real part of the impedance Z against the frequency f, are obtained, determining at least one of the following SOH parameters, which can be selected from a predetermined list, establishing an SOH row vector {right arrow over (P)} from the SOH parameters and all mixed terms of the form p·p, m=1, . . . , 11, n=1, . . . , m. The invention provides for the multiplication of the SOH row vector {right arrow over (P)} by a saved calibration vector {right arrow over (A)}, thereby obtaining the ageing parameter K.