Ultracapacitors (UCs) are the focus of increasing attention in electric vehicle and renewable energy system applications due to their excellent performance in terms of power density, efficiency, and lifespan. Modeling and parameterization of UCs play an important role in model-based regulation and management for a reliable and safe operation. In this paper, an equivalent circuit model template ...

This study investigates a new hybrid energy storage system (HESS), which consists of a battery bank and an ultra-capacitor (UC) bank, and a control strategy for this system. The proposed topology uses a bi-directional DC-DC converter with a lower power rating than those used in the traditional HESS topology. The proposed HESS has four operating modes, and the proposed control strategy chooses t...

Energy management for systems presenting at least two energy sources is still a challenge. Moreover in Hybrid Electrical Vehicle the power must be managed in real time within system constraints. Energy management is based on efficiency models and data of both sources as function of the delivered power. With efficiency behavior knowledge, an optimization can be made. Logic rules are presented al...

The functioning of a solar hybrid power system is investigated in this research using unique fuzzy control method. Turbines, photovoltaics, diesel engines, fuel cells, aqua-electrolyzes, and other autonomous generation products are used the renewable energy system. Further storage components include batteries, turbine, ultracapacitor. This incorporates supercapacitor (HESS) into generating syst...

An adhesive and conductive glue was created by synergistic assembly of graphene oxide (GO), single walled carbon nanotubes (SWCNTs) and conjugate polymer PEDOT:PSS in aqueous solution. The GO–SWCNTs–PEDOT:PSS glue can be used as a binder to fabricate metal oxide nanoparticle based ultracapacitors. Since the functional nanoparticles are immersed in this conductive gel, uniform electrical and mec...

Searching for a better efficiency, an auxiliary energy system for electric vehicles was designed, implemented and tested. The system, composed of an ultracapacitor bank and a buckboost converter, was installed in an electric vehicle, which is powered by a lead-acid battery pack and a 54 kW brushless DC motor. Two control strategies where developed: one based on heuristics and the other based on...