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:
Jun. 15, 2021
Filed:
Jan. 11, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
Garrett M. Seeman, Novi, MI (US);
Justin Bunnell, Northville, MI (US);
Ciro A. Spigno, Waterford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for estimating remaining energy in a battery pack having series-connected cells/cell groups includes measuring battery parameters, including a battery voltage, current, and temperature. The controller estimates a static state of charge difference (ΔSOC) value and a current-dependent ΔSOC value in real-time using the parameters, including calculating the static ΔSOC value as a difference between an average SOC of the battery pack and an SOC of a weakest/lowest energy cell group. The current-dependent ΔSOC value is a percentage SOC per unit of the current. The static ΔSOC value and current-dependent ΔSOC values are filtered via a multi-parameter state estimator block. Using the filtered state values, the controller executes a control action responsive to the estimated remaining energy, including displaying the remaining energy and/or a quantity derived from the remaining energy via a display device. A powertrain system includes the controller, electric machine, and battery pack.