Journal of Electrical Engineering and Technology

  • 제12권5호
  • /
  • Pages.1812-1820
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  • 2017
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Analysis of a Symmetric Active Cell Balancer with a Multi-winding Transformer

  • Jeon, Seonwoo (Dept. of Electrical Engineering, Hanyang University) ;
  • Kim, Myungchin (School of Electrical Engineering, Chungbuk National University) ;
  • Bae, Sungwoo (Dept. of Electrical Engineering, Hanyang University)
  • 투고 : 2016.11.01
  • 심사 : 2017.01.03
  • 발행 : 2017.09.01
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초록

This paper analyzes a symmetric active cell balancer for a battery management system. The considered cell balancer uses a forward converter in which the circuit structure is symmetric. This cell-balancing method uses fewer switches and is simpler than the previously proposed active cell-balancing circuits. Active power switches of this cell-balancing circuit operate simultaneously with the same pulse width modulation signals. Therefore, this cell-balancing circuit requires less time to be balanced than a previous bidirectional-forward-converter-based cell balancer. This paper analyzes the operational principles and modes of this cell balancer with computer-based circuit simulation results as well as experimental results in which each unbalanced cell is equalized with this cell balancer. The maximum power transfer efficiency of the investigated cell balancer was 87.5% from the experimental results. In addition to the experimental and analytical results, this paper presents the performance of this symmetric active cell-balancing method.

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참고문헌

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피인용 문헌

  1. A Modular Cell Balancer Based on Multi-Winding Transformer and Switched-Capacitor Circuits for a Series-Connected Battery String in Electric Vehicles vol.8, pp.8, 2018, https://doi.org/10.3390/app8081278