BATTERY MANAGEMENT DEVICE, BATTERY PACK, BATTERY SYSTEM, AND BATTERY MANAGEMENT METHOD

Title:

BATTERY MANAGEMENT DEVICE, BATTERY PACK, BATTERY SYSTEM, AND BATTERY MANAGEMENT METHOD

Document Type and Number:

WIPO Patent Application WO/2022/025725

Kind Code:

A1

Abstract:

A battery management device according to the present invention comprises: a voltage measurement circuit for measuring a cell voltage of each of multiple battery cells; and a control unit for determining the cell voltage of each of the multiple battery cells and a reference voltage of the multiple battery cells at every set time in an idle period. The control unit determines a first accumulated variance of the cell voltage of each battery cell in the idle period. The control unit determines a second accumulated variance of the reference voltage in the idle period. The control unit decides whether each cell is abnormal, by comparing the first accumulated variance of each battery cell with the second accumulated variance.

Inventors:

SHIM MYUNG-HYUN (KR)
YOON SUNG-YUL (KR)
KIM KI-WOONG (KR)
KIM WON-KYUNG (KR)
LEE JEONG-BIN (KR)
IM JAE-SUNG (KR)
CHOI WON-BIN (KR)

Application Number:

PCT/KR2021/010016

Publication Date:

February 03, 2022

Filing Date:

July 30, 2021

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

G01R31/396; G01R19/00; G01R19/165; G01R19/30; G01R31/36; G01R31/382

Foreign References:

KR20200026128A	2020-03-10
KR20180055123A	2018-05-25
JP2003059544A	2003-02-28
JP2003243048A	2003-08-29
KR20200077238A	2020-06-30
KR20200096289A	2020-08-11

Other References: