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Title: Analysis and comparative study of different converter modes in modular second-life hybrid battery energy storage systems
Authors: Mukherjee, Nilanjan
Strickland, Dani
Keywords: Second life battery energy storage systems (SLBESS)
Hybrid battery energy storage system (HBESS)
Boostmultilevel buck converter
Multiple battery types
Comparison
Issue Date: 2015
Publisher: © IEEE
Citation: MUKHERJEE, N. and STRICKLAND, D., 2015. Analysis and comparative study of different converter modes in modular second-life hybrid battery energy storage systems. IEEE Journal of Emerging and Selected Topics in Power Electronics, 4 (2), pp. 547-563.
Abstract: The use of extransportation battery system (i.e., second-life electric vehicle/hybrid electric vehicle batteries) in grid applications is an emerging field of study. A hybrid battery scheme offers a more practical approach in second-life battery energy storage systems, because battery modules could be from different sources/vehicle manufacturers depending on the second-life supply chain and have different characteristics, e.g., voltage levels, maximum capacity, and also different levels of degradations. Recent research studies have suggested a dc-side modular multilevel converter topology to integrate these hybrid batteries to a grid-tie inverter. Depending on the battery module characteristics, the dc-side modular converter can adopt different modes, such as boost, buck, or boost-buck to suitably transfer the power from the battery to the grid. These modes have different switching techniques, control range, different efficiencies, which give a system designer choice on an operational mode. This paper presents an analysis and comparative study of all the modes of the converter along with their switching performances in detail to understand the relative advantages and disadvantages of each mode to help to select the suitable converter mode. Detailed study of all the converter modes and the thorough experimental results based on a multimodular converter prototype with hybrid batteries have been presented to validate the analysis.
Description: © 2015 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.
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC), U.K., under Grant EP/1008764/1.
Version: Accepted for publication
DOI: 10.1109/JESTPE.2015.2460334
URI: https://dspace.lboro.ac.uk/2134/24952
Publisher Link: http://dx.doi.org/10.1109/JESTPE.2015.2460334
ISSN: 2168-6777
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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