BATTERY DIAGNOSIS METHOD, AND BATTERY DIAGNOSIS APPARATUS AND BATTERY SYSTEM PROVIDING SAME

WIPO Patent Application WO/2023/224195

A1

The present invention relates to a battery diagnosis method capable of diagnosing the state of a battery including a plurality of battery cells connected in parallel, and a battery diagnosis apparatus and a battery system providing the method. The battery diagnosis apparatus of the present invention comprises: a measuring unit that measures a battery voltage, which is a voltage at both ends of a battery including a plurality of battery cells, and a battery current, which is a current flowing through the battery; a storage unit that stores an internal resistance value of the battery which is calculated on the basis of the battery voltage and the battery current at each diagnosis time point of diagnosing a defect of the battery; and a control unit that calculates, at each diagnosis time point, a moving average value that is an average of a plurality of internal resistance values corresponding to the number of samples previously stored on the basis of the diagnosis time point, and compares the internal resistance value calculated at each diagnosis time point with an upper limit value, which has a predetermined value larger than the moving average value, and a lower limit value, which has a predetermined value smaller than the moving average value to diagnose the defect the battery.

KIM DONG HYUN (KR)
AN HYO SEONG (KR)

PCT/KR2022/018716

November 23, 2023

November 24, 2022

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LG ENERGY SOLUTION LTD (KR)

G01R31/396; G01R27/08; G01R31/36; G01R31/374; G01R31/3842; G01R31/389; G01R31/392

JP2008256673A	2008-10-23
KR20220060814A	2022-05-12
JP2015031674A	2015-02-16
KR20210054930A	2021-05-14
JP6571268B2	2019-09-04

YOU ME PATENT AND LAW FIRM (KR)

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