Design and Implementation of a Modular Multilevel Series-Parallel Converter for Second-Life Battery Energy Storage Systems

Esteban Concha, Ricardo Lizana F*, Sebastian Rivera, Abraham M. Alcaide

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Battery Energy Storage Systems (BESS) offer scalable energy storage solutions, especially valuable for remote, off-grid applications. However, traditional battery packs with fixed series-parallel configurations lack reconfigurability and are limited by the weakest cell, hindering their application for second-life batteries. The Modular Multilevel Series-Parallel Converter (MMSPC) addresses these limitations by enabling dynamic reconfiguration, optimizing cell balancing, and enhancing energy control. This paper experimentally evaluates a single-phase BESS based on the MMSPC with an output power equivalent to 2 kW and two battery units (155V), demonstrating stable output and reduced internal losses across varied battery parameters.

Original languageEnglish
Article number4409
JournalElectronics (Switzerland)
Volume13
Issue number22
DOIs
StatePublished - Nov 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 by the authors.

Keywords

  • energy storage
  • MMSPC
  • second-life batteries

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