Fast Charging of Lithium-Ion Batteries Using a Full-Bridge Rectifier and Buck Converter with SOC Tracking

Year : 2025 | Volume : 15 | Issue : 02 | Page : 18 25
    By

    K. Priyanka,

  • G. Ruchitha,

  • G. David,

  • B. Kavya,

  • Ravindra Janga,

  1. Student, Department of Electrical and Electronics Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, India
  2. Student, Department of Electrical and Electronics Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, India
  3. Student, Department of Electrical and Electronics Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, India
  4. Student, Department of Electrical and Electronics Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, India
  5. Assistant Professor, Department of Electrical and Electronics Engineering, Bapatla Engineering College, Bapatla, Andhra Pradesh, India

Abstract

This paper presents a simplified and cost-effective approach to electric vehicle (EV) fast charging by replacing the conventional neutral point clamped (NPC) converter with a full-bridge diode rectifier followed by a buck converter. The proposed topology is designed to deliver a regulated 80 V DC from a three-phase AC grid to charge a lithium-ion battery at a controlled current of 3 A. The converter design includes a three-phase diode bridge rectifier, appropriately sized filter components, and a buck converter operating at a switching frequency of 20 kHz. A key focus of the study is on real-time monitoring of the battery’s state of charge (SOC) using the Coulomb counting method, allowing performance evaluation under dynamic charging conditions. Simulation results demonstrate that the simplified converter configuration effectively supports the fast charging profile of a 14S Li-ion battery pack, achieving accurate SOC tracking and efficient power transfer. This research highlights the feasibility of using a full-bridge rectifier and buck converter combination in place of complex multilevel converters, making the system more suitable for low-cost and compact EV charging stations. The observed system performance suggests significant potential for deployment in DC microgrid-based charging infrastructures.

Keywords: Battery state of charge, buck converter, DC fast charging, full-bridge rectifier, lithium-ion battery

[This article belongs to Trends in Electrical Engineering ]

How to cite this article:
K. Priyanka, G. Ruchitha, G. David, B. Kavya, Ravindra Janga. Fast Charging of Lithium-Ion Batteries Using a Full-Bridge Rectifier and Buck Converter with SOC Tracking. Trends in Electrical Engineering. 2025; 15(02):18-25.
How to cite this URL:
K. Priyanka, G. Ruchitha, G. David, B. Kavya, Ravindra Janga. Fast Charging of Lithium-Ion Batteries Using a Full-Bridge Rectifier and Buck Converter with SOC Tracking. Trends in Electrical Engineering. 2025; 15(02):18-25. Available from: https://journals.stmjournals.com/tee/article=2025/view=224544


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Regular Issue Subscription Original Research
Volume 15
Issue 02
Received 24/04/2025
Accepted 09/05/2025
Published 12/08/2025
Publication Time 110 Days
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