Vehicle having an electrical circuit arrangement and two electric drive units and method for the operation thereof

A method for operating a vehicle comprising an electrical circuit arrangement, which comprises a traction battery;

• an electrical connection configured to be electrically coupled to a vehicle-external electric unit;
• a first high-voltage potential;
• a second high-voltage potential, wherein the first high-voltage potential is a positive high-voltage potential and the second high-voltage potential is a negative high-voltage potential or vice-versa;
• and first and second electric drive units, each having an inverter and an electric three-phase motor electrically coupled to a respective one of the first and second electric drive units, wherein the first and second electric drive units are configured to drive the vehicle, wherein the electrical circuit arrangement is configured such that the first and second electric drive units are selectively connected in series between the electrical connection and the traction battery such that, from the electrical connection to the traction battery, the first electric drive unit increases the first high-voltage potential and the second electric drive unit increases the second high-voltage potential, wherein the inverters each have a capacitor between a potential line of the first high-voltage potential and a potential line of the second high-voltage potential, wherein the electrical circuit arrangement is configured such that the second electric drive unit is selectively connected in series with a capacitor connection of the first electric drive unit, wherein one of the potential lines of the inverter of the second electric drive unit is electrically connected to a capacitor connection contact, having a same high-voltage potential, of the capacitor connection of the inverter of the first electric drive unit, and wherein the electrical circuit arrangement is configured such that
• a neutral point of the electric three-phase motor of the second electric drive unit is selectively connected to the other capacitor connection contact of the capacitor connection of the inverter of the first electric drive unit, the potential line of the first electric drive unit is selectively connected to a connection contact of the electrical connection, which has the same high-voltage potential, and a neutral point of the electric three-phase motor of the first electric drive unit is selectively connected to another connection contact of the electrical connection, or
• a winding connection of the electric three-phase motor of the second electric drive unit is selectively connected to the other capacitor connection contact of the capacitor connection of the inverter of the first electric drive unit, the potential line of the first electric drive unit is selectively connected to the connection contact of the electrical connection having the same high-voltage potential, and a winding connection of the electric three-phase motor of the first electric drive unit is selectively connected to the other connection contact of the electrical connection,
• the method comprising:
• during a driving operation of the vehicle, both inverters are each connected directly to the traction battery, wherein the method further comprises
• to charge the traction battery with the vehicle-external electric unit electrically coupled to the electrical connection and is a DC charging station having a charging voltage lower than a nominal voltage of the traction battery, or for providing electrical energy by the traction battery to the vehicle-external electric unit electrically coupled to the electrical connection, the first and second electric drive units are electrically connected in series between the electrical connection and the traction battery, or
• to charge the traction battery with the vehicle-external electric unit electrically coupled to the electrical connection and is a DC charging station having a charging voltage is at least as high as the nominal voltage of the traction battery, the electrical connection is electrically connected directly to the traction battery.