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:
Aug. 18, 2015
Filed:
Oct. 22, 2013
GM Global Technology Operations Llc, Dearborn, MI (US);
Yilu Zhang, Northville, MI (US);
Xinyu Du, Windsor, CA;
Mutasim A. Salman, Rochester Hills, MI (US);
Shuo Huang, Warren, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
An embodiment contemplates a method of determining a state-of-charge of a battery for a vehicle. (a) An OCV is measured for a current vehicle ignition startup after ignition off for at least eight hours. (b) An SOCis determined for the current vehicle ignition startup. (c) An SOCis determined for a current vehicle ignition startup. (d) A determination is made whether the difference in the SOCfor the current startup and the SOCfor the current startup is less than a predefined error bound using. Steps (a)-(d) is performed in response to the difference being greater than the predefined error; otherwise, determining an ignition-off current for the current vehicle ignition startup as a function of the SOCof the current vehicle ignition startup and previous vehicle ignition startup, and a SOC based on current integration over time. Determining an SOCof the current vehicle ignition startup using the processor.