Title:
APPARATUS AND METHOD FOR ESTIMATING BATTERY STATE-OF-CHARGE
Document Type and Number:
WIPO Patent Application WO/2019/078477
Kind Code:
A1
Abstract:
An apparatus for estimating a battery state-of-charge, according to the present invention, comprises: a sensing unit configured to respectively measure the voltage, current and temperature of a battery; and a processor operably coupled to the sensing unit, wherein the processor can be configured so as to: set a first reference voltage on the basis of a first state of charge according to the battery voltage, which is calculated in advance through the battery current measured at every charging/discharging cycle of the battery; calculate a second state of charge according to the battery voltage by using an equivalent circuit model corresponding to the battery; set a voltage area of the battery as a first voltage area and a second voltage area on the basis of the first reference voltage; and estimate a state of charge of the battery in each of the first voltage area and the second voltage area as either the first state of charge or the second state of charge.
Inventors:
LEE BOM-JIN (KR)
Application Number:
PCT/KR2018/010005
Publication Date:
April 25, 2019
Filing Date:
August 29, 2018
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
G01R31/36; H01M10/42; H01M10/48; H01M50/569
Foreign References:
| KR20160014165A | 2016-02-11 | |||
| KR20140070790A | 2014-06-11 | |||
| KR20170116427A | 2017-10-19 | |||
| JP2013507628A | 2013-03-04 | |||
| US8264202B2 | 2012-09-11 | |||
| KR20170136781A | 2017-12-12 |
Other References:
See also references of EP 3637120A4
Attorney, Agent or Firm:
PHIL ONZI INTL PATENT LAW FIRM (KR)
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