Self-balanced Two-output Battery Charger
Autor:
Branas, Christian
; Azcondo, Francisco J.
; Pigazo, Alberto
; Casanueva, Rosario
; Díaz, Francisco J.
; Lamo-Anuarbe, Paula
Fecha:
2023Palabra clave:
Revista / editorial:
Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APECCitación:
C. Branas, F. J. Azcondo, A. Pigazo, R. Casanueva, F. J. Díaz and P. Lamo, "Self-balanced Two-output Battery Charger," 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), Orlando, FL, USA, 2023, pp. 1902-1907, doi: 10.1109/APEC43580.2023.10131140.Tipo de Ítem:
conferenceObjectDirección web:
https://ieeexplore.ieee.org/document/10131140Resumen:
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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