Reduction of Battery-Aging of a Hybrid Lithium-Ion and Vanadium-Redox-Flow Storage System in a Microgrid Application

Hybridization of different storage technologies can improve the performance and the economic conditions of a storage system. In this paper a laboratory-based microgrid supplied by a photovoltaic power system is presented. The microgrid integrates a hybrid energy storage system that consists of an AC-connected lithium-ion battery and a vanadium-based redox-flow storage system. According to aging and operation characteristics of the storage systems a modelling approach is derived and positive effects on the lifetime of the hybrid battery system are shown.