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. 29, 2015
Filed:
Sep. 09, 2011
James C. Gibbs, Brighton, MI (US);
Joseph Bisbing, White Lake, MI (US);
Kurt M. Johnson, Brighton, MI (US);
Damon R. Frisch, Troy, MI (US);
Brian J. Koch, Berkley, MI (US);
James C. Gibbs, Brighton, MI (US);
Joseph Bisbing, White Lake, MI (US);
Kurt M. Johnson, Brighton, MI (US);
Damon R. Frisch, Troy, MI (US);
Brian J. Koch, Berkley, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method and system for use with a vehicle battery pack having a number of individual battery cells, where the method estimates, extrapolates or otherwise determines individual cell resistances. According to an exemplary embodiment, the method and system use a voltage and temperature reading for each of the individual battery cells, as well as a voltage and current reading for the overall battery pack to determine one or more cell resistance values, such as a minimum and maximum cell resistance for the battery pack. This approach relies upon temperature deviations in the battery pack to make assumptions or estimates regarding individual battery cell resistances. By having individual cell resistance values—instead of using an overall pack resistance value and building in a buffer to account for cell variations—better and more accurate cell-level data can be obtained that, in turn, can improve charging, discharging, cell balancing and/or other battery-related processes.