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A High-Gain Reflex-Based Bidirectional DC Charger with Efficient Energy Recycling for Low-Voltage Battery Charging-Discharging Power Control

Author

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  • Ching-Ming Lai

    (Department of Vehicle Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Road, Taipei 106, Taiwan
    Graduate Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Road, Taipei 106, Taiwan)

  • Yun-Hsiu Li

    (Graduate Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Road, Taipei 106, Taiwan)

  • Yu-Huei Cheng

    (Department of Information and Communication Engineering, Chaoyang University of Technology, Taichung 41349, Taiwan)

  • Jiashen Teh

    (School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal 14300, Malaysia)

Abstract

This study proposes a high-gain reflex-charging-based bidirectional DC charger (RC-BDC) to enhance the battery charging efficiency of light electric vehicles (LEV) in a DC-microgrid. The proposed charger topology consists of an unregulated level converter (ULC) and a two-phase interleaved buck-boost charge-pump converter (IBCPC), which together provide low ripple and high voltage conversion ratio. As the high-gain RC-BDC charges, the LEV’s battery with reflex charging currents, high battery charging efficiency, and prolonged battery life cycles are achieved. This is possible due to the recovering of negative pulse energy of reflex charging currents to reduce charge dissipations within LEV’s batteries. Derivations of the operating principles of the high-gain RC-BDC, analyses of its topology, and the closed-loop control designs were presented. Simulations and experiments were implemented with battery voltage of 48 V and DC-bus voltage of 400 V for a 500 W prototype. The results verify the feasibility of the proposed concept and were compared with the typical constant-current/constant-voltage (CC/CV) charger. The comparison shows that the proposed high gain RC-BDC improves battery charging speed and reduces the battery thermal deterioration effect by about 12.7% and 25%, respectively.

Suggested Citation

  • Ching-Ming Lai & Yun-Hsiu Li & Yu-Huei Cheng & Jiashen Teh, 2018. "A High-Gain Reflex-Based Bidirectional DC Charger with Efficient Energy Recycling for Low-Voltage Battery Charging-Discharging Power Control," Energies, MDPI, vol. 11(3), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:623-:d:135784
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    References listed on IDEAS

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    1. Cheng-Tao Tsai & Ying-Che Kuo & Ying-Piao Kuo & Chin-Tsung Hsieh, 2015. "A Reflex Charger with ZVS and Non-Dissipative Cells for Photovoltaic Energy Conversion," Energies, MDPI, vol. 8(2), pages 1-17, February.
    2. Ching-Ming Lai & Yuan-Chih Lin & Dasheng Lee, 2015. "Study and Implementation of a Two-Phase Interleaved Bidirectional DC/DC Converter for Vehicle and DC-Microgrid Systems," Energies, MDPI, vol. 8(9), pages 1-23, September.
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    Cited by:

    1. Castillo-Calzadilla, T. & Cuesta, M.A. & Olivares-Rodriguez, C. & Macarulla, A.M. & Legarda, J. & Borges, C.E., 2022. "Is it feasible a massive deployment of low voltage direct current microgrids renewable-based? A technical and social sight," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).
    2. Oswaldo Lopez-Santos & José Omar Urrego-Aponte & Sebastián Tilaguy-Lezama & José David Almansa-López, 2018. "Control of the Bidirectional Buck-Boost Converter Operating in Boundary Conduction Mode to Provide Hold-Up Time Extension," Energies, MDPI, vol. 11(10), pages 1-15, September.

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