VEHICLE-TO-VEHICLE CHARGING USING VOLTAGE CONVERTER SYSTEM WITH BYPASS SWITCHES FOR REDUCED LOSSES

A direct current-to-direct current (DC-DC) converter system for charging between respective charge-providing and receiving donor and recipients systems includes input and output filter capacitors connected to a rechargeable energy storage system (RESS) of the donor and recipient, and a link capacitor in parallel with input and output stages of the system. A boost stage has a first switching control circuit inclusive of a first plurality of switches. A buck stage has a second control circuit inclusive of a second plurality of switches. The first and second pluralities of switches have respective bypass switches. A controller identifies respective voltage ranges of the donor and recipient. In response to the voltage ranges, the controller selectively bypasses a charging path in the boost or buck stages during charging by closing the first or second bypass switch. This action minimizes losses in the converter system.