Self-balanced two-output battery charger

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Identificadores
URI: https://hdl.handle.net/10902/31235
ISBN: 978-1-6654-7539-6
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Autoría
Brañas Reyes, ChristianAutoridad Unican; Azcondo Sánchez, Francisco JavierAutoridad Unican; Pigazo López, AlbertoAutoridad Unican; Casanueva Arpide, RosarioAutoridad Unican; Díaz Rodríguez, Francisco JavierAutoridad Unican; Lamo Anuarbe, Paula
Fecha
2023
Derechos
© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
Thirty-Eigth Annual IEEE Applied Power Electronics Conference and Exposition, Orlando, Florida, 2023, 1902-1907
Editorial
Institute of Electrical and Electronics Engineers, Inc.
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Palabras clave
Power electronics
Battery chargers
Resonant power conversion
Batteries
HF transformers
Resumen/Abstract
The design and modeling of a self-balanced two-output battery charger capable to charge two high-power LiFePO4 battery packs is presented. The proposal is based on a four-phase resonant converter, which is designed as a voltage-controlled current-source, working at constant switching frequency. The output stage consists of a transformer with a single primary and two secondaries implementing two current-doubler rectifiers. The structure of the output stage naturally imposes the self-balance-of-charge of both battery packs provided that the coupling between the primary and each of the secondaries has a negligible mismatch. The electrical model of the battery is used to study the batteries charge equalization during the charging process considering the non-idealities of the output transformer. The theoretical analysis and design procedure of the proposed battery charger is fully explained. The output current capability and efficiency are validated experimentally considering a 50 Ah 48 V commercial battery pack.
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