Title:
DISCHARGE VOLTAGE GRAPH PREDICTION METHOD AND BATTERY SYSTEM USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/149770
Kind Code:
A1
Abstract:
A method for predicting a constant current discharge graph for a battery cell according to one aspect of the invention comprises the steps of: measuring a first time required for the voltage of the battery cell to decrease to a first discharge limit voltage by means of a first constant current discharge; measuring a second time required for the voltage of the battery cell to decrease to a second discharge limit voltage by means of a second constant current discharge; and calculating a proportional constant and an exponential parameter in the relationship between discharge current and time on the basis of the first constant current and the first time, and the second constant current and the second time. When the discharge current is 0, the first discharge limit voltage is a discharge reference voltage, minus a first voltage drop due to the first constant current and the internal resistance of the battery cell, and the second discharge limit voltage is the discharge reference voltage minus a second voltage drop due to the second constant current and the internal resistance of the battery cell.
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Inventors:
LEE SUN JONG (KR)
KIM CHEOLTAEK (KR)
KIM CHEOLTAEK (KR)
Application Number:
PCT/KR2021/019714
Publication Date:
July 14, 2022
Filing Date:
December 23, 2021
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
G01R31/367; G01R19/10; G01R19/175; G01R31/36; G01R31/382; G01R31/385; G01R31/396; H01M10/42; H01M10/48
Foreign References:
| JP2019219193A | 2019-12-26 | |||
| JP2007163145A | 2007-06-28 | |||
| JP2013059244A | 2013-03-28 | |||
| KR20080000896A | 2008-01-03 | |||
| JP2009244179A | 2009-10-22 |
Other References:
See also references of EP 4194868A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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