METHOD AND APPARATUS FOR DIAGNOSING SOH IMBALANCE OF USED BATTERY DEVICE

WIPO Patent Application WO/2024/005338

A1

A method for diagnosing state of health (SOH) imbalance between battery cells included in a used battery device comprises the steps of: detecting the voltage value differences between the battery cells; charging the battery cells for a first period, receiving respective charging voltage values of the battery cells from the used battery device, and determining a charging voltage ranking on the basis of the charging voltage values; discharging the battery cells for a second period, receiving respective discharging voltage values of the battery cells from the used battery device, and determining a discharging voltage ranking on the basis of the discharging voltage values; determining N (N is a natural number) high-rank battery cells having large voltage value differences between the charging voltage values and the discharging voltage values; and diagnosing that the battery device has SOH imbalance if there is, among the N high-rank battery cells, a deteriorated battery cell of which the discharging voltage ranking drops by at least an M (M is a natural number) rank in comparison to the charging voltage ranking.

KIM YE-KYU (KR)
KIM SANG-HOON (KR)
LEE BYUNG-EUN (KR)
LEE HYUNG-KEUN (KR)
CHUNG GYU-JIN (KR)

PCT/KR2023/005922

January 04, 2024

April 28, 2023

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SK ON CO LTD (KR)

G01R31/392; G01R19/00; G01R19/10; G01R31/36; G01R31/3835; G01R31/388; G01R31/396

KR20150029204A	2015-03-18
KR20160079637A	2016-07-06
KR20080000390A	2008-01-02
KR20160067510A	2016-06-14
US20190170826A1	2019-06-06

C&S PATENT AND LAW OFFICE (KR)

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