Method and device for preparing a transmission of energy to a vehicle by means of an inductive charging system

1. A method for preparing a transmission of energy to a vehicle by an inductive charging system, which has a base plate arranged on a primary side of the charging system and a secondary side arranged in or on the vehicle, wherein a first coil is provided in the base plate and a second coil is provided on the secondary side in a vehicle plate, comprising:

energizing the second coil provided on the secondary side from a vehicle-based power sources; and

diagnosing the functionality of components arranged on the secondary side of the inductive charging system by evaluating the energization carried out on the secondary side of the inductive charging system,

wherein the diagnosing the functionality of components arranged on the secondary side of the inductive charging system includes diagnosing the functionality of a discharging arrangement arranged on the secondary side of the inductive charging system,

wherein the discharging arrangement comprises a resistor and a transistor,

wherein a resonator circuit on the secondary side comprising the second coil is connected to a rectifier, and

wherein the rectifier is connected to an energy store via the discharging arrangement.

2. The method as claimed in claim 1 , in which the functionality of the second coil arranged on the secondary side of the inductive charging system is diagnosed.

3. The method as claimed in claim 2 , in which the functionality of the second coil arranged on the secondary side of the inductive charging system is diagnosed in respect of a presence of a short circuit and/or in respect of a presence of one or more open terminals.

4. The method as claimed in claim 2 , in which the functionality of the second coil arranged on the secondary side of the inductive charging system is diagnosed in respect of the resonant behavior thereof.

5. The method as claimed in claim 3 , in which the functionality of the second coil arranged on the secondary side of the inductive charging system is diagnosed in respect of the resonant behavior thereof.

6. The method as claimed in claim 1 , in which the functionality of a rectifier arranged on the secondary side of the inductive charging system is diagnosed.

7. The method as claimed in claim 1 , in which the functionality of a filter capacitor arranged on the secondary side of the inductive charging system is diagnosed.

8. The method as claimed in claim 1 , in which the energization of the second coil provided on the secondary side is controlled by a control unit arranged in the vehicle and the diagnosis of the functionality of the components arranged on the secondary side of the inductive charging system is performed by the control unit arranged in the vehicle.

9. The method as claimed in claim 1 , in which, upon identification of a functional incapacity of one of the components arranged on the secondary side of the inductive charging system, the control unit arranged in the vehicle initiates an output of an information signal indicating the functional incapacity of one of the components arranged on the secondary side of the inductive charging system.

10. The method as claimed in claim 1 , in which the second coil provided on the secondary side is energized from a low-voltage on-board electrical system of the vehicle.

11. The method as claimed in claim 1 , in which the second coil provided on the secondary side is energized from a vehicle battery.

12. The method as claimed in claim 1 , wherein the discharging arrangement further comprises a diode.

13. A device for preparing a transmission of energy to a vehicle by an inductive charging system, which has a base plate arranged on a primary side of the charging system and a secondary side arranged in or on the vehicle, wherein a first coil is provided in the base plate and a second coil is provided on the secondary side in a vehicle plate, wherein the device furthermore comprises:

a vehicle-based power source, which is designed to energize the second coil provided on the secondary side, and

a vehicle-based control unit, which is designed to control the energization of the second coil provided on the secondary side and to diagnose the functionality of components arranged on the secondary side of the inductive charging system by evaluating the energization carried out,

wherein the vehicle-based control unit is designed to diagnose the functionality of a discharging arrangement arranged on the secondary side of the inductive charging system,

wherein the discharging arrangement comprises a resistor and a transistor,

wherein a resonator circuit on the secondary side comprising the second coil is connected to a rectifier, and

wherein the rectifier is connected to an energy store via the discharging arrangement.

14. The device as claimed in claim 13 , in which on the secondary side capacitors are connected to the second coil and form a rcsonator the resonant circuit together with the second coil.

15. The device as claimed in claim 14 , wherein a filter capacitor is connected to the output of the rectifier.

16. The device as claimed in claim 15 , further comprising a voltmeter connected to the rectifier.

17. The device as claimed in claim 16 , which has an ammeter, which is arranged between the filter capacitor and the discharging arrangement.

18. The device as claimed in claim 15 , which has an ammeter, which is arranged between the filter capacitor and the discharging arrangement.

19. The apparatus as claimed in claim 15 , in which the discharging arrangement has a transistor controlled by the control unit.