Bidirectional Cuk Converter in Partial-Power Architecture with Current Mode Control for Battery Energy Storage System in Electric Vehicles

Abstract

This paper presents a partial-power processing architecture intended for an on-board charger. This module is integrated into a Battery Energy Storage System (BESS). This model allows us to easily control the charge-discharge current of the LiFePO4 battery, as well as the current injection on the DC-bus (V2G). The architecture used in the partial-power processing is based on the non-isolated bidirectional Cuk converter, with average current mode control. The purpose has been to compare both topologies, Full-Power and Partial-Power, to observe the advantages and disadvantages that each on-board charger design offers. Partial architecture has some advantages such as high power density, small size, decrease stress on devices, as the DC-DC converter only processes a fraction of the total power. Thus, the purpose of this paper has been to analyze and explore the usefulness of the non-isolated bidirectional Cuk converter with partial-power processing architecture in battery charging systems in electric vehicles. The effectiveness of the strategy has been validated by the Matlab/Simulink software simulation.