This study proposes Lithium-ion battery aging correction state-of-charge (SOC) estimation techniques. Although the battery is aging, the SOC error estimation system maintains the setting range using a low-cost 8 bit micro-controller. The proposed method can track and correct the open-circuit voltage against capacity in the battery management system by comparing the capacity error with the coulomb counting and look-up table methods. The experimental results verify that the SOC estimation error is still lower than 3.5% after 1000 cycles. The SOC estimation verification platform verifies the Sanyo UR18650 W lithium battery. After 300 accelerated aging cycle charge–discharge tests, the test results showed that the SOC prediction precision for an aged battery is as high as 2.67%.
State-of-charge estimation with aging effect and correction for lithium-ion battery
IET Electrical Systems in Transportation ; 5 , 2 ; 70-76
2015-06-01
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
battery management system , aging effect , secondary cells , 8 bit micro-controller , look-up table methods , state-of-charge estimation , open-circuit voltage , coulomb counting , SOC estimation error , Sanyo UR18650 W lithium battery , capacity error , Li , microcontrollers , ageing , SOC estimation techniques , SOC error estimation system , table lookup , lithium , lithium-ion battery aging correction , SOC estimation verification platform , accelerated aging cycle charge–discharge tests , life testing
Metadata by IET is licensed under CC BY 3.0
Lithium ion battery charge state estimation and equalization control method
Europäisches Patentamt | 2024
|State of Charge Estimation of Lithium-Ion Battery Using Energy Consumption Analysis
Springer Verlag | 2023
|