Modeling and SoC Estimation of Lithium-Ion Batteries Used in Electric Vehicles

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Yağcı B., Ünlü M.

INTERNATIONAL CONFERENCE ON ENGINEERING TECHNOLOGIES (ICENTE’24) , Konya, Turkey, 21 - 23 November 2024, pp.200-205, (Full Text)

  • Publication Type: Conference Paper / Full Text
  • City: Konya
  • Country: Turkey
  • Page Numbers: pp.200-205
  • Open Archive Collection: AVESIS Open Access Collection
  • Kocaeli University Affiliated: Yes

Abstract

Abstract-

With advancing technologies, energy demand is increasing worldwide. However, it is impossible to find enough fossil fuels to meet this energy demand. For this reason, studies on energy storage technologies have increased. Along with these studies, battery technology has also developed. In this way, electric vehicles have increased their popularity. Modeling is very important to define the battery correctly in electric vehicles. In this study, the thevenin model is taken as a reference for the lithiumion battery. A lithium-ion battery is charged under constant current. Voltage values were taken as a function of time. A time dependent voltage graph was created using Excel. The thevenin equivalent circuit of the battery was extracted from the charge graph. Using the obtained thevenin model, the charge curve was extracted in MATLAB/Simulink. Finally, an exponential curve connected to the SoC was created using the least squares method from the numerical analysis methods

Keywords - Energy Storage, Electric Vehicles, Lithium-Ion Batteries, Battery Modeling.