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:
Mar. 12, 2002
Filed:
Feb. 07, 2001
Applicant:
Inventor:
Ramona Y. Ying, Rochester Hills, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/7416 ;
U.S. Cl.
CPC ...
G01N 2/7416 ;
Abstract
A method and apparatus for determining the state of charge of a battery including the steps of determining whether the battery is in a charge decreasing, sustaining or increasing mode, integrating the charge going in and out of the battery to determine a current-based state of charge measurement if the battery is in a charge increasing or sustaining mode, and determining the open circuit voltage to determine an open circuit-based state of charge measurement if the battery is in a charge decreasing mode.