The device for battery charge or discharge based on the technology of bidirectionalconverter can be used in charging or discharging battery, and realize sine wave of ac and unity power factor.
For isolated-type symmetry half-bridge bidirectionalconverter with phase-shifted control, a simplified circuit under 4 modes using the primary windings of transformer as reference object is built.
It can improve the performance of the storage batteries and the workingefficiency of driving systems by using bidirectional DC/DC converter in ElectricVehicle at present.