The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Electrochemical Analysis and SOC Estimation Techniques by Using Extended Kalman Filter of the Non-aqueous Li-air Battery

비수계 리튬에어 배터리의 전기화학적 분석 및 확장 칼만 필터를 이용한 SOC 추정기법

  • Yoon, Chang-O (Dept. of Electrical Engineering, Chungnam National University) ;
  • Lee, Pyeong-Yeon (Dept. of Electrical Engineering, Chungnam National University) ;
  • Kim, Jong-Hoon (Dept. of Electrical Eng., Chungnam National University)
  • Received : 2016.09.29
  • Accepted : 2018.01.17
  • Published : 2018.04.20
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Abstract

In this work, we propose techniques for estimating the SOC of Li-air battery. First, we describe and explain the operation principle of the Li-air battery. Energy density of the Li-air battery was compared with that of the Li-ion battery. The capacity and impedance value of the fully discharged voltage is analyzed, and the OCV value for SOC estimation is measured through the electrochemical characterization of the Li-air battery. Estimation value is obtained by SOC modeling through extended Kaman filter and is compared with the measurement value from the Coulomb counting method. Moreover, the performance of SOC estimation circuit is evaluated.

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References

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