Method for controlling an electric motor of a battery-operated electric vehicle, battery-operated electric vehicle and a control device for a battery-operated electric vehicle

1 . A method for controlling an electric motor of a battery-operated electric vehicle (BEV), the method comprising:

receiving a signal for activating a drive slip control function for a braked start at full load of the BEV;

supplying the electric motor with a predefined basic application of current while the BEV is in a braked state, wherein a body of the BEV is caused to be lowered in response to the predefined basic application of current; and

triggering a vibration mode of the body of the BEV by excitation of the electric motor in accordance with a predefined excitation scheme in addition to the predefined basic application of current.

2 . The method according to claim 1 , wherein the predefined excitation scheme comprises an oscillating electric driving torque, an effective value of which does not make contribution to propelling the BEV.

3 . The method according to claim 2 , wherein the effective value of the oscillating electric driving torque lies above a predetermined threshold value, which is above a motor torque of 50 Nm.

4 . The method according to claim 2 , wherein the oscillating electric driving torque lies in a frequency range of 10 Hz to 300 Hz.

5 . The method according to claim 1 , wherein the predefined basic application of current lies in a range of 40 A to 140 A.

6 . The method according to claim 1 , wherein the predefined excitation scheme comprises pulsating excitation with a change between high and low currents, wherein an amplitude lies in a range of 20 Nm to 200 Nm.

7 . The method according to claim 1 , comprising:

deactivating the vibration mode.

8 . A battery-operated electric vehicle (BEV) comprising:

a controller configured to:

receive a signal for activating a drive slip control function for a braked start at full load of the BEV;

supply an electric motor of the BEV with a predefined basic application of current while the BEV is in a braked state, wherein a body of the BEV is configured to be lowered in response to the predefined basic application of current; and

trigger a vibration mode of the body of the BEV by excitation of the electric motor in accordance with a predefined excitation scheme in addition to the predefined basic application of current.

9 . The BEV according to claim 8 , wherein the predefined excitation scheme comprises an oscillating electric driving torque, an effective value of which does not make contribution to propelling the BEV.

10 . The BEV according to claim 9 , wherein the effective value of the oscillating electric driving torque lies above a predetermined threshold value, which is above a motor torque of 50 Nm.

11 . The BEV according to claim 9 , wherein the oscillating electric driving torque lies in a frequency range of 10 Hz to 300 Hz.

12 . The BEV according to claim 8 , wherein the predefined basic application of current lies in a range of 40 A to 140 A.

13 . The BEV according to claim 8 , wherein the controller is configured to:

trigger the vibration mode by excitation of the electric motor in accordance with the predefined excitation scheme by triggering a pulsating excitation with a change between high and low currents, wherein an amplitude lies in a range of 20 Nm to 200 Nm.

14 . The BEV according to claim 8 , wherein the controller is configured to:

deactivate the vibration mode.

15 . A controller for a battery-operated electric vehicle (BEV), wherein the controller is configured to:

receive a signal for activating a drive slip control function for a braked start at full load of the BEV;

supply an electric motor of the BEV with a predefined basic application of current while the BEV is in a braked state, wherein the controller is configured to cause a body of the BEV to be lowered in response to the predefined basic application of current; and

trigger a vibration mode of the body of the BEV by excitation of the electric motor in accordance with a predefined excitation scheme in addition to the predefined basic application of current.

16 . The controller according to claim 15 , wherein the predefined excitation scheme comprises an oscillating electric driving torque, an effective value of which does not make contribution to propelling the BEV.

17 . The controller according to claim 16 , wherein the effective value of the oscillating electric driving torque lies above a predetermined threshold value, which is above a motor torque of 50 Nm.

18 . The controller according to claim 16 , wherein the oscillating electric driving torque lies in a frequency range of 10 Hz to 300 Hz.

19 . The controller according to claim 15 , wherein the predefined basic application of current lies in a range of 40 A to 140 A.

20 . The controller according to claim 15 , configured to:

trigger the vibration mode by excitation of the electric motor in accordance with the predefined excitation scheme by triggering a pulsating excitation with a change between high and low currents, wherein an amplitude lies in a range of 20 Nm to 200 Nm.