BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK, AND VEHICLE

Title:

BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK, AND VEHICLE

Document Type and Number:

WIPO Patent Application WO/2022/114871

Kind Code:

A1

Abstract:

A battery diagnosis device according to the present invention is for diagnosis of a cell group including multiple battery cells connected in series, and comprises: a voltage sensing circuit configured to periodically generate a voltage signal indicating a cell voltage of each battery cell; and a control circuit configured to generate time series data indicating a change in the cell voltage of each battery cell over time on the basis of the voltage signal. The control circuit is configured to: (i) determine a first average cell voltage and a second average cell voltage of each battery cell on the basis of the time series data [wherein the first average cell voltage corresponds to a short-term moving average, and the second average cell voltage corresponds to a long-term moving average]; and (ii) detect an anomaly in the voltage of each battery cell on the basis of a difference between the first average cell voltage and the second average cell voltage.

Inventors:

SUNG YONG-CHUL (KR)
AN YANG-SOO (KR)

Application Number:

PCT/KR2021/017684

Publication Date:

June 02, 2022

Filing Date:

November 26, 2021

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

G01R31/36; B60L3/00; B60L58/18; G01R19/00; G01R19/10; G01R19/165; G01R31/382; G01R31/392; G01R31/396

Foreign References:

JP2020119712A	2020-08-06
JP2001027663A	2001-01-30
JP2017156268A	2017-09-07
JP2019039825A	2019-03-14
KR101619657B1	2016-05-11
KR20200163366A	2020-11-27

Other References: