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. 05, 2021
Filed:
Oct. 30, 2018
GM Global Technology Operations Llc, Detroit, MI (US);
Raghunathan K, Troy, MI (US);
Ramona Y. Ying, Rochester Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A battery control system for a vehicle includes a battery state estimator configured to obtain a battery cell open circuit voltage (OCV) of a battery in response to a charging system charging the battery to a maximum charging voltage. The system includes a negative voltage determination module configured to determine a negative OCV of the battery based on the obtained cell or battery OCV. The system includes a voltage shift determination module configured to identify a difference between the negative OCV of the battery and a previous negative OCV of the battery. The system also includes a charge voltage module configured to selectively reduce the maximum charging voltage to a reduced maximum charging voltage based on the difference and transmit the reduced maximum charging voltage to the charging system. The charging system is instructed to charge the battery such that the battery does not exceed the reduced maximum charging voltage.