A Fuzzy Logic-Based Controlling Battery Charger with Bidirectional Capability for Electric Vehicles

The environmental effects of petroleum transport networks and the fear of peak oil have combined with technological developments and renewed enthusiasm for renewable energy to cause an increase in the popularity of electric vehicles. Furthermore, because of the growing number of electric cars, which may double as mobile storage units, grid-to-vehicle (G2V), vehicle-to-grid (V2G), and vehicle-to-vehicle (V2V) have received a lot of attention. The ability to discharge power from a battery boosts its versatility in terms of supplying energy back to the grid, and it also helps to power stand-alone loads like emergency rescue equipment or outdoor lights. The electrical vehicle (EV) charger must thus include simultaneous operation, a high density of power, and good efficiency. High efficiency and bidirectionality are hallmarks of dual active bridge (DAB) converters. This paper describes the workings of a DAB converter and its closed-loop regulation using one of the phase shifts regulating methods, as well as its power and flow properties. To accomplish bidirectional operation for charging the battery in Fuzzy based on assessment of state of charge (SOC), a closed loop control method is designed.