Comparison of power electronics solutions to exchange energy between high voltage batteries

Abstract

International audienceElectrification of always more powerful systems is usually correlated to higher needs in reliability, service continuity and energy exchanges between sources. In the field of energy storage systems, these needs are often addressed by parallelization of batteries, which are automatically disconnected in case of fault. The service continuity is thus simply ensured. If the disconnection of two batteries in parallel is an instantaneous process well controlled, the connection is a longer process more complicated, which requires adapted power electronics solutions. Based on a concrete case of application and thanks to simulations, we propose in this paper to compare different solutions to exchange energy between two lithium ion battery systems. This question has been addressed in the framework of a H2020 European project named ESPRIT "Easily Distributed Personal Rapid Transit". In the first part of the paper we will present the project and more precisely the societal benefits, the main objectives and the first important results. The second part of the paper will deal with the comparison of power electronics solutions designed to exchange energy between batteries