Repurposed battery for energy storage in applications of renewable energy for grid applications

This paper investigates an approach to repurposing old hybrid electric vehicle batteries for energy storage in electrical networks that incorporate renewable energy sources. Such batteries suffer from aging affects that limit their ability to maintain their designed capacity, voltage and current ratings. Furthermore, this paper examines the battery aging factors which will affect the development of a repurposed battery energy storage system and uses pulsed charge regulation and interlacing of batteries to form a multi-level battery operation scheme to further the life of the aged batteries. The approach is demonstrated using detailed electromagnetic transient simulations.