Method for controlling a drivetrain of an electric vehicle, data processing device, drivetrain and electric vehicle

A method for controlling a drivetrain of an electric vehicle during DC-charging of a traction battery of the drivetrain via a DC charging interface of the drivetrain, the DC charging interface electrically couplable to a DC charging station outside the electric vehicle, the drivetrain comprising the traction battery, a N-phase traction inverter unit, a N-phase electric machine and a charging circuit, the electric machine being electrically coupled to the traction battery via the traction inverter unit, the charging circuit comprising at least partially the traction inverter unit and at least partially the electric machine, and the DC charging interface being electrically connected to the N-phase traction inverter unit and the N-phase electric machine, the method comprising:

• controlling the traction inverter unit such that the traction inverter unit operates as a DC-DC converter,
• receiving a position of a rotor of the electric machine,
• selecting a number out of the N phases of the electric machine as components of the charging circuit, the selection being dependent on the position of the rotor of the electric machine, and
• controlling the traction inverter unit such that the selected number out of the N phases of the electric machine forms part of the charging circuit.