Battery - Ultracapacitor Energy Storage System Set Up Control through Fuzzy Logic Algorithm

The aim of this work is to show the impact of an Energy Storage System (ESS) management on the energy transfer processes during load variations. The studied ESS includes a battery rack interfaced through a dc dc bidirectional converter with an ultracapacit or rack. The output energy is supplied to a programmable and variable resistive load. The proposed strategy based on fuzzy logic algorithm is tested and implemented on Matlab Simulink. The obtained results shown, improve the robustness of the adopted control strategy to manage the energy flow

Design and realization of a bidirectional full bridge converter with improved modulation strategies

In this paper a Full-Bridge Converter (FBC) for bidirectional power transfer is presented. The proposed FBC is an isolated DC-DC bidirectional converter, connected to a double voltage source—a voltage bus on one side and a Stack of Super-Capacitors (SOSC) on the other side. The control law aims at the regulation either of the bus current (when the load requires power) or of the SOSC current (when the stack requires a recharge). Analysis and design of the proposed FBC are discussed. A Phase Shift Modulation (PSM) scheme is proposed, along with an improved modulation variant for the efficiency optimization, through a proper reduction of the transformer power losses. The realized prototype, compliant with automotive applications, is presented and experimental results are highlighted. The target power level is 2 kW

Design of a Battery/Ultracapacitor Energy Storage System for Electric Vehicle Applications

The battery/ultracapacitors (UCs) integration is able to provide notable advantages in the power management of an electric vehicle (EV), in terms of capability of both high energy storage and readiness to deal with fast load variations. In order to manage the charge (or discharge) of the UCs from (or towards) a DC voltage bus, a proper bi-directional converter is required. In this paper, a bi-directional DC-DC converter in connection with a stack of UCs is described and some power simulation results are provided. The proposed converter is a B2R (buck-boost regulator) type. The load is represented by a 40kW peak power, kept for a time window of 3s, as required by the Worldwide harmonized Light vehicles Test Procedure (WLTP)