US Patent 11338690 Power-supply and recharge groups

A power-supply and recharge group for an electric vehicle comprising: a first battery pack; a second battery pack; a first DC-to-DC converter; a second DC-to-DC converter; a low-voltage power-supply source; and a control unit configured to: detect a charge difference between a first and a second battery pack; transfer an electric current from a low-voltage power-supply source to the one of the first and second battery pack having a lower charge, until said charge difference is cancelled; connect the first and the second battery pack to one another in series and recharge them by means of a recharge station on the outside of the vehicle. A direct connection between the DC-to-DC converters can replace the auxiliary low-voltage source.