A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications

Juncai Xin; Yueshi Guan; Xiang Li; Yijie Wang; Dianguo Xu

doi:10.1109/CIEEC69682.2026.11572081

A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications

Juncai Xin^*
, Yueshi Guan
, Xiang Li
, Yijie Wang
, Dianguo Xu

^*Corresponding author for this work

School of Electrical Engineering and Automation, Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The escalating demand for advanced battery management systems in electric vehicles and energy storage necessitates efficient, high-conversion-ratio bidirectional power converters. This paper proposes a flying-capacitor-based bidirectional converter with a unique closed-loop control strategy for 48 V to 2-4 V bidirectional power transfer. The proposed converter addresses key challenges in low-voltage, high-current energy-storage applications by employing constant-current PI control during charging and voltage closed-loop PI control during discharging. In addition, a hysteresis-based zero-current detection scheme is introduced to ensure stable and seamless power transition. A 200kHz, 48V to 2-4V, 400W prototype was built, whose peak efficiency is 96.37 %. Experimental results validate the converter's dynamic performance and control strategy, confirming its suitability for modern battery management systems.

Original language	English
Title of host publication	Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2243-2248
Number of pages	6
ISBN (Electronic)	9798331549558
DOIs	https://doi.org/10.1109/CIEEC69682.2026.11572081
State	Published - 2026
Externally published	Yes
Event	9th International Electrical and Energy Conference, CIEEC 2026 - Tianjin, China Duration: 15 May 2026 → 17 May 2026

Publication series

Name	Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026

Conference

Conference	9th International Electrical and Energy Conference, CIEEC 2026
Country/Territory	China
City	Tianjin
Period	15/05/26 → 17/05/26

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Bidirectional DC/DC converter
Hysteresis Zero- Current Detection
low-voltage high-current
seamless mode transition

Access to Document

10.1109/CIEEC69682.2026.11572081

Cite this

Xin, J., Guan, Y., Li, X., Wang, Y., & Xu, D. (2026). A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications. In Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026 (pp. 2243-2248). (Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CIEEC69682.2026.11572081

Xin, Juncai ; Guan, Yueshi ; Li, Xiang et al. / A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications. Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026. Institute of Electrical and Electronics Engineers Inc., 2026. pp. 2243-2248 (Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026).

@inproceedings{b8fc065c974c4c418c74150fdc32e2f5,

title = "A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications",

abstract = "The escalating demand for advanced battery management systems in electric vehicles and energy storage necessitates efficient, high-conversion-ratio bidirectional power converters. This paper proposes a flying-capacitor-based bidirectional converter with a unique closed-loop control strategy for 48 V to 2-4 V bidirectional power transfer. The proposed converter addresses key challenges in low-voltage, high-current energy-storage applications by employing constant-current PI control during charging and voltage closed-loop PI control during discharging. In addition, a hysteresis-based zero-current detection scheme is introduced to ensure stable and seamless power transition. A 200kHz, 48V to 2-4V, 400W prototype was built, whose peak efficiency is 96.37 \%. Experimental results validate the converter's dynamic performance and control strategy, confirming its suitability for modern battery management systems.",

keywords = "Bidirectional DC/DC converter, Hysteresis Zero- Current Detection, low-voltage high-current, seamless mode transition",

author = "Juncai Xin and Yueshi Guan and Xiang Li and Yijie Wang and Dianguo Xu",

note = "Publisher Copyright: {\textcopyright} 2026 IEEE.; 9th International Electrical and Energy Conference, CIEEC 2026 ; Conference date: 15-05-2026 Through 17-05-2026",

year = "2026",

doi = "10.1109/CIEEC69682.2026.11572081",

language = "英语",

series = "Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "2243--2248",

booktitle = "Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026",

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Xin, J, Guan, Y, Li, X, Wang, Y & Xu, D 2026, A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications. in Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026. Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026, Institute of Electrical and Electronics Engineers Inc., pp. 2243-2248, 9th International Electrical and Energy Conference, CIEEC 2026, Tianjin, China, 15/05/26. https://doi.org/10.1109/CIEEC69682.2026.11572081

A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications. / Xin, Juncai; Guan, Yueshi; Li, Xiang et al.
Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026. Institute of Electrical and Electronics Engineers Inc., 2026. p. 2243-2248 (Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications

AU - Xin, Juncai

AU - Guan, Yueshi

AU - Li, Xiang

AU - Wang, Yijie

AU - Xu, Dianguo

PY - 2026

Y1 - 2026

N2 - The escalating demand for advanced battery management systems in electric vehicles and energy storage necessitates efficient, high-conversion-ratio bidirectional power converters. This paper proposes a flying-capacitor-based bidirectional converter with a unique closed-loop control strategy for 48 V to 2-4 V bidirectional power transfer. The proposed converter addresses key challenges in low-voltage, high-current energy-storage applications by employing constant-current PI control during charging and voltage closed-loop PI control during discharging. In addition, a hysteresis-based zero-current detection scheme is introduced to ensure stable and seamless power transition. A 200kHz, 48V to 2-4V, 400W prototype was built, whose peak efficiency is 96.37 %. Experimental results validate the converter's dynamic performance and control strategy, confirming its suitability for modern battery management systems.

AB - The escalating demand for advanced battery management systems in electric vehicles and energy storage necessitates efficient, high-conversion-ratio bidirectional power converters. This paper proposes a flying-capacitor-based bidirectional converter with a unique closed-loop control strategy for 48 V to 2-4 V bidirectional power transfer. The proposed converter addresses key challenges in low-voltage, high-current energy-storage applications by employing constant-current PI control during charging and voltage closed-loop PI control during discharging. In addition, a hysteresis-based zero-current detection scheme is introduced to ensure stable and seamless power transition. A 200kHz, 48V to 2-4V, 400W prototype was built, whose peak efficiency is 96.37 %. Experimental results validate the converter's dynamic performance and control strategy, confirming its suitability for modern battery management systems.

KW - Bidirectional DC/DC converter

KW - Hysteresis Zero- Current Detection

KW - low-voltage high-current

KW - seamless mode transition

UR - https://www.scopus.com/pages/publications/105044579688

U2 - 10.1109/CIEEC69682.2026.11572081

DO - 10.1109/CIEEC69682.2026.11572081

M3 - 会议稿件

AN - SCOPUS:105044579688

T3 - Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026

SP - 2243

EP - 2248

BT - Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 9th International Electrical and Energy Conference, CIEEC 2026

Y2 - 15 May 2026 through 17 May 2026

ER -

Xin J, Guan Y, Li X, Wang Y, Xu D. A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications. In Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026. Institute of Electrical and Electronics Engineers Inc. 2026. p. 2243-2248. (Proceedings of 2026 IEEE 9th International Electrical and Energy Conference, CIEEC 2026). doi: 10.1109/CIEEC69682.2026.11572081

A Bidirectional DC/DC Converter for High-Voltage-Gain High-Current Applications

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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