Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Electric Model of Li-Ion Polymer Battery for Motor Driving Circuit in Hybrid Electric Vehicle

  • Lee, June-Sang (Dept. of electrical and electronic engineering, Sungkyunkwan University) ;
  • Lee, Jae-Joong (Dept. of electrical and electronic engineering, Sungkyunkwan University) ;
  • Kim, Mi-Ro (Dept. of computer aided engineering, Hyundai Mobis) ;
  • Park, In-Jun (Dept. of advanced material science and engineering, Sungkyun-kwan University) ;
  • Kim, Jung-Gu (Dept. of advanced material science and engineering, Sungkyun-kwan University) ;
  • Lee, Ki-Sik (Dept. of electronic and electrical engineering, Dankook University) ;
  • Nah, Wan-Soo (School of information and communication engineering, Sungkyunkwan University)
  • Received : 2011.12.01
  • Accepted : 2012.08.17
  • Published : 2012.11.01
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Abstract

This paper presents an equivalent circuit model of a LIPB (Li-Ion Polymer battery) for Hybrid Electric Vehicles (HEVs). The proposed equivalent circuit can be used to predict the charging/discharging characteristics in time domain as well as the impedance characteristic analysis in frequency domain. Based on these features, a one-cell model is established as a function of Depth of Discharge (DoD), and a 48-cell model for a battery pack was also established. It was confirmed by experiment that the proposed model predict the discharging and impedance (AC) characteristics quite accurately at different constant current levels. To check the usefulness of the proposed circuit, the model was used to simulate a motor driving circuit with an Insulated Gate Bipolar Transistor (IGBT) inverter and Brushless DC (BLDC) motor, and it is confirmed that the model can calculate the battery voltage fluctuation in time domain at different DoDs.

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References

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