Title:
二次電池の充電状態を推定するための装置及びその方法
Document Type and Number:
Japanese Patent JP6848144
Kind Code:
B2
Abstract:
Provided is an apparatus and method for estimating a state of charge of a secondary battery. The apparatus includes a sensor unit configured to measure a voltage and a current of the secondary battery in a predetermined cycle, and a control unit operably coupled to the sensor unit. The control unit is configured to estimate the state of charge of the secondary battery in the predetermined cycle based on the voltage and the current measured by the sensor unit. The control unit is further configured to determine an operating state of the secondary battery as any one of a linear operating state and a non-linear operating state based on a threshold voltage and the measured voltage, and then determine first process noise indicating inaccuracy of a current integration model and second process noise indicating inaccuracy of an equivalent circuit model according to the determined operating state.
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Inventors:
Kim, Yong-Jin
Cha, Seung-young
Cha, Seung-young
Application Number:
JP2019556250A
Publication Date:
March 24, 2021
Filing Date:
September 19, 2018
Export Citation:
Assignee:
LG HAUSYS,LTD.
International Classes:
G01R31/389; G01R31/385; H01M10/48; H02J7/00
Domestic Patent References:
| JP2008010420A |
Foreign References:
| WO2016147722A1 |
Attorney, Agent or Firm:
Longhua International Patent Service Corporation