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:
Feb. 28, 2023
Filed:
Jan. 15, 2020
GM Global Technology Operations Llc, Detroit, MI (US);
Alfred Zhang, Troy, MI (US);
Justin Bunnell, Northville, MI (US);
Garrett M. Seeman, Novi, MI (US);
Jeffrey S. Piasecki, Rochester, MI (US);
Charles W. Wampler, Birmingham, MI (US);
Brian J. Koch, Berkley, MI (US);
Jing Gao, Rochester, MI (US);
Jeffrey A. Bednar, Highland, MI (US);
Xiumei Guo, Troy, MI (US);
Justin R. McDade, Livonia, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for battery capacity estimation is provided. The method includes monitoring a sensor, collecting a plurality of data points including a voltage-based state of charge value and an integrated current value, defining within the data points a first data set collected during a first time period and a second data set collected during a second time period, determining an integrated current error related to the second data set, comparing the integrated current error related to the second data set to a threshold integrated current error. When the error related to the second data set exceeds the threshold, the method further includes resetting the second data set based upon an integrated current value from the first time period. The method further includes combining the data sets to create a combined data set and determining a voltage slope capacity estimate as a change in integrated current versus voltage-based state of charge.