Battery life investigation of a hybrid energy management system considering battery temperature effect

This paper investigates the effect of temperature on a hybrid energy storage system with various energy management systems. The hybrid energy storage system consists of a fuel cell, ultracapacitor and battery with associated DC/DC and DC/AC converters. The energy management strategies employed are the state machine control strategy, fuzzy frequency/logic decoupling strategy, minimization strategy of equivalent consumption (ECMS) and external energy maximization strategy (EEMS). Initially, a module of ۳.۳v ۲.۳Ah LiPo۴ batteries consisting of ۱۵ cells in series and ۱۵ rows in parallel are studied without considering the temperature effect. In the next step, the studies are repeated considering the temperature variation effects. The current and SOC associated with the battery, the hydrogen consumption, and battery life are studied for each strategy. The results suggest that the errors associated with the battery life estimation, as well as the battery current are significant with and without considering the temperature effects with the values of ۳۰% and ۲۰%, respectively.

Keywords:

Battery life , Hybrid energy storage systems , Power distributions , Thermal model , energy management