Title:
APPARATUS, SYSTEM, AND METHOD FOR PREDICTING PERFORMANCE OF SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2022/071651
Kind Code:
A1
Abstract:
The present invention relates to an apparatus, system, and method for predicting the performance of a secondary cell. The apparatus of the present invention comprises: a current sensor for measuring a discharge current output from the secondary cell during a discharge period in which the secondary cell is discharged from a predetermined reference voltage to a constant voltage; and a control unit for calculating the relationship between the change in resistance and the change in state of charge (SOC) during the discharge period on the basis of the reference voltage and the change in the discharge current over time. The control unit calculates the resistance values of each of a first resistance, a second resistance, and a third resistance on the basis of the relationship between the change in resistance and the change in SOC during the discharge period, wherein the first resistance is the resistance due to the voltage drop of the secondary cell, the second resistance is the resistance generated as ions are inserted into an active material of the secondary cell during the discharge period, and the third resistance is the polarization resistance generated by the movement of the ions in the secondary cell.
Inventors:
PARK JI HYE (KR)
JOE WONTAE (KR)
JOE WONTAE (KR)
Application Number:
PCT/KR2021/009685
Publication Date:
April 07, 2022
Filing Date:
July 27, 2021
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
G01R31/389; G01R19/00; G01R19/12; G01R27/08; G01R31/36; G01R31/382; H01M10/42; H02J7/00
Domestic Patent References:
| WO2001051947A1 | 2001-07-19 |
Foreign References:
| JP2014149280A | 2014-08-21 | |||
| JP2004134129A | 2004-04-30 | |||
| CN108196191A | 2018-06-22 | |||
| KR20070020322A | 2007-02-20 | |||
| KR20200126848A | 2020-11-09 |
Other References:
See also references of EP 4123324A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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