Title:
BATTERY MANAGEMENT SYSTEM, BATTERY PACK, ELECTRIC VEHICLE, AND BATTERY MANAGEMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/080161
Kind Code:
A1
Abstract:
A battery management system according to the present invention categorizes a plurality of battery cells into at least one group on the basis of the estimated SOC of each of the plurality of battery cells from a previous cycle. The battery management system estimates, on the basis of a first cell current, a second cell current, and the average SOC of each group from a previous cycle, the average polarization voltage of each group in the present cycle by using a first Kalman filter. The first cell current represents a cell current measured in the previous cycle, and the second cell current represents a cell current measured in the present cycle. The battery management system estimates, on the basis of the first cell current, the second cell current, and the average polarization voltage of each group in the present cycle, the SOC of each battery cell in the present cycle by using a second Kalman filter.
Inventors:
LEE SUN-JONG (KR)
Application Number:
PCT/KR2020/011775
Publication Date:
April 29, 2021
Filing Date:
September 02, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
G01R31/367; B60L3/00; B60L58/12; G01R15/04; G01R19/00; G01R19/10; G01R19/165; G01R31/36; G01R31/396
Foreign References:
| KR20160048666A | 2016-05-04 | |||
| KR20190073254A | 2019-06-26 | |||
| KR20190027609A | 2019-03-15 | |||
| KR20190098531A | 2019-08-22 | |||
| JP2017138128A | 2017-08-10 | |||
| KR20190133525A | 2019-12-03 |
Other References:
See also references of EP 3929606A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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