HIGH VOLTAGE BATTERY SYSTEM FOR VEHICLE TO VEHICLE CHARGING

An electrified vehicle includes an electrified powertrain, a high voltage (HV) battery system including a first HV battery pack and a second HV battery pack, and a HV electrical system including one or more switches and/or contactors configured to selectively connect the HV battery system to a HV bus to power HV loads within the electrified vehicle or power HV loads outside the electrified vehicle. A control system includes a controller programmed to operate in a vehicle-to-vehicle (V2V) charging mode, including, electrically disconnecting the first HV battery pack from the HV bus to function as a reserve battery, electrically connecting the second HV battery pack to the HV bus to function as a donor battery, and discharging the second HV battery pack to charge an additional electrified vehicle or power outside HV loads, while maintaining a charge of the first HV battery pack to thereby reserve power for future use.