Battery charging system including isolated power splitter operating in simultaneous charging and discharging mode

A battery charging system for a vehicle comprising:

• a multi-port transformer including first windings, second windings, and third windings wound around a common core;
• a first converter connected to the first windings and including a first plurality of switches;
• a first electromagnetic interference (EMI) filter connected to the first converter;
• a second converter connected to the second windings and including a second plurality of switches;
• a second EMI filter connected to the second converter and to a battery;
• a third converter connected to the third windings and including a third plurality of switches;
• a third EMI filter connected to the third converter and an alternating current (AC) power outlet;
• a ground fault circuit interrupter (GFCI) connected between the third converter and the AC power outlet;
• a first plurality of configuration switches configured to selectively connect the first EMI filter to a charge port;
• a second plurality of configuration switches configured to selectively connect the first converter to the second converter;
• a third plurality of configuration switches configured to selectively connect the third converter to the AC power outlet;
• and
• a controller configured to control the first plurality of switches of the first converter, the second plurality of switches of the second converter, the third plurality of switches of the third converter, the first plurality of configuration switches, and the second plurality of configuration switches to select one of:
• a charging mode for charging the battery,
• a charging/discharging mode for charging the battery from an AC grid via the charge port while supplying power to the AC power outlet, and
• a discharging/discharging mode for discharging the battery to via the charge port to a load while supplying power to the AC power outlet.