Electric drive system for a vehicle, and method for operating an electric drive system

An electric drive system for a vehicle, the electric drive system comprising:

• first and second three-phase electric machines configured to drive at least one drive axle of the vehicle, wherein the first and second three-phase electric machines respectively include a first and second inverter;
• an electrical energy store configured to electrically supply the first and second three-phase electric machines during a driving operation of the vehicle, wherein the first and second inverters are coupled to the electrical energy store;
• an onboard charging terminal configured to electrically couple the electrical energy store to a charging unit external to the vehicle, wherein the first or second inverter is configured to convert a charging voltage of the onboard charging terminal into a supply voltage for charging the electrical energy store by operating the first or second inverter as a boost converter;
• and
• a switching device configured to electrically couple the onboard charging terminal to the first and second three-phase electric machines for a charging operation of the vehicle, wherein in a first switching position of the switching device both positive and negative terminals of the onboard charging terminal are electrically connected directly to the electrical energy store and in a second switching position of the switching device both of the positive and negative terminals of the onboard charging terminal are electrically connected to the electrical energy store via the first and second three-phase electric machines,
• wherein the first three-phase electric machine and the second three-phase electric machine are disposed on a rear axle of the vehicle or on a front axle of the vehicle and a first wheel of the front axle or rear axle is drivable by the first three-phase machine and a second wheel of the front axle or rear axle, different from the first wheel, is drivable by the second three-phase electric machine, and
• wherein in the first switching position of the switching device the electrical energy store is directly chargeable with the charging voltage and in the second switching position of the switching device the electrical energy store is chargeable with the supply voltage, which is higher than the charging voltage.