Title:
BATTERY MANAGEMENT SYSTEM, BATTERY PACK INCLUDING SAME, AND METHOD OF ESTABLISHING CHARGING PROTOCOL OF LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/101901
Kind Code:
A2
Abstract:
By a method of establishing a charging protocol of a lithium secondary battery and a battery management system according to the present invention, a closed circuit voltage (CCVSOCx) and an open circuit voltage (OCVSOCx), which change according to a depth of charge (SOCx), are measured while charging a 2-electrode battery cell at each charge current (I), the measured CCVSOCx and OCVSOCx are substituted in Equation 1 below to calculate an internal resistance value (RSOCx), which changes according to the depth of charge, and an internal resistance profile obtained by plotting the internal resistance value (RSOCx), which changes according to the depth of charge, is collected for each charge current (I) to determine a limit depth of charge corresponding to each charge current from the internal resistance profile. [Equation 1] Internal resistance value changing according to depth of charge (RSOCx)=(CCVSOCx - OCVSOCx)/I
Inventors:
YOON YEO KYUNG (KR)
KIM YONG JUN (KR)
KIM YONG JUN (KR)
Application Number:
PCT/KR2023/017917
Publication Date:
May 16, 2024
Filing Date:
November 08, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H02J7/00; G01R31/3835; G01R31/389
Attorney, Agent or Firm:
KIM, Hong Gyun (KR)
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