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:
Apr. 23, 2019
Filed:
Nov. 15, 2013
Lg Chem, Ltd., Seoul, KR;
Kyu-Ha Park, Seoul, KR;
Cheol-Taek Kim, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
Disclosed is an apparatus and method for estimating a battery state, the apparatus including a measurement unit for measuring a terminal voltage, a charging/discharging current and a current offset value of a battery, a prediction unit for predicting a state variable and an output variable according to a state equation including SOC and an overpotential of the battery as state variables and includes a terminal voltage of the battery as an output variable, a correction unit for correcting the predicted state variable, a SOC estimation unit for estimating SOC of the battery by means of the corrected state variable, and a control unit for selecting a single state variable to estimate SOC of the battery according to the measured current offset value, so that the SOC estimation unit estimates SOC of the battery by means of the selected state variable.