DEVICE AND METHOD FOR DIAGNOSING BATTERY

Title:

DEVICE AND METHOD FOR DIAGNOSING BATTERY

Document Type and Number:

WIPO Patent Application WO/2021/230642

Kind Code:

A1

Abstract:

The present invention provides a device for measuring voltages of respective battery cells, thereby diagnosing whether an error has occurred in the battery cells. The present invention includes a voltage measurement circuit, a data processing circuit, and a diagnostic circuit. The voltage measurement circuit measures voltage of a battery cell. The data processing circuit calculates a target statistical value indicating a state of a battery cell on the basis of voltage measured by the voltage measurement circuit, and calculates a cumulative statistical value by accumulating target statistical values of the battery cell during an analysis period. The diagnostic circuit determines whether an error has occurred in a battery cell, through an accumulation determination operation of comparing a cumulative statistical value with a cumulative reference value, and counts the number of accumulated errors when it is determined, during the accumulation determination operation, that an error has occurred in the battery cell.

Inventors:

KIM YOUNG JIN (KR)
JOE WON TAE (KR)
LEE BOM JIN (KR)
LIM BO MI (KR)

Application Number:

PCT/KR2021/005917

Publication Date:

November 18, 2021

Filing Date:

May 12, 2021

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

G01R31/367; G01R31/36; G01R31/3835; G01R31/396; H01M10/42; H01M10/48

Foreign References:

KR20190073654A	2019-06-27
KR20170102598A	2017-09-12
JP2004247319A	2004-09-02
JP2011054413A	2011-03-17
CN102667513B	2015-03-25

Other References: