Kolahian, Pouya;
Baghdadi, Mehdi;
(2025)
A Foil-Wound Multi-Winding Transformer-Based Equalizer for Minimized Voltage Discrepancy.
In:
2025 Energy Conversion Congress & Expo Europe (ECCE Europe).
IEEE: Birmingham, United Kingdom.
Preview |
Text
Baghdadi_A Foil Wound Multi-winding transformer.pdf - Accepted Version Download (1MB) | Preview |
Abstract
This paper presents a multi-winding transformer-based voltage equalizer for series-connected lithium-ion batteries in electric vehicles. Traditional equalizers often suffer from high costs and large sizes due to numerous MOSFETs and isolated gate drivers. Additionally, as equalization progresses, decreasing voltage differences between cells lead to diminishing current flow, hindering the balancing process. The proposed design utilizes foil sheet windings within the multi-winding transformer, significantly reducing leakage inductance and thereby improving balancing speed and efficiency. Furthermore, the topology employs a single MOSFET and winding per cell, leading to a compact solution particularly suitable for large battery stacks in electric vehicles. To further enhance efficiency, the paper introduces an advanced soft-switching method. The functionality of the proposed design was validated using a prototype implementing a 4-cell voltage equalization process at 100 kHz.
| Type: | Proceedings paper |
|---|---|
| Title: | A Foil-Wound Multi-Winding Transformer-Based Equalizer for Minimized Voltage Discrepancy |
| Event: | 2025 Energy Conversion Congress & Expo Europe (ECCE Europe) |
| Location: | Birmingham, United Kingdom |
| Dates: | 1 Sep 2025 - 4 Sep 2025 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ecce-europe62795.2025.11238678 |
| Publisher version: | https://doi.org/10.1109/ecce-europe62795.2025.1123... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Lithium-ion batteries, MOSFET, Inductance, Equalizers, Windings, Prototypes, Europe, Voltage, Electric vehicles, Transformers |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10218328 |
Archive Staff Only
 |
View Item |
