Motor vehicle

Patent metadata

Field	Value
Publication number	US-12377722-B2
Application number	US-202218068827-A
Country	US
Kind code	B2
Filing date	Dec 20, 2022
Priority date	Dec 20, 2021
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A motor vehicle may include a drive train which has at least one electric machine. The electric machine can be connected or is connected to an electric energy store that can be charged with a charging interface from an external charging device, which electric machine is designed to generate a torque and transmit it to an output of the drive train. A decoupling device may be included, which is designed to mechanically decouple the electric machine from the output, when required, in order to carry out a charging operation in a decoupling state. In the decoupling state, a rotational movement of the rotor of the electric machine into a target charging orientation of the rotor is decoupled from the output of the drive train.

First claim

We claim:

1. A motor vehicle, comprising:
a drive train which has at least one electric machine, wherein the electric machine is connectable to an electric energy store that is chargeable with a charging interface from an external charging device,
wherein in a first state, the electric machine generates a torque which is transmittable to an output of the drive train,
wherein in a second state, the electric machine transmits current from a charging interface to an electric energy store;
a decoupling device which is configured to mechanically decouple the electric machine from the output in order to carry out a charging operation in a decoupling state,
wherein, in the decoupling state, a rotational movement of the rotor of the electric machine into a target charging orientation of the rotor is decoupled from the output of the drive train.

2. The motor vehicle of claim 1 , wherein the decoupling device is configured to lock the rotor of the electric machine in the target charging orientation with a at least one of a locking device and by establishing the coupling to the output.

3. The motor vehicle of claim 1 , wherein the decoupling device is configured to brace the rotor of the electric machine after the adoption of the target charging orientation by applying a defined preloading torque in the drive train.

4. The motor vehicle of claim 1 , wherein the decoupling device has at least one claw clutch.

5. The motor vehicle of claim 4 , wherein the claw clutch has from 30 to 70 teeth.

6. The motor vehicle of claim 4 , wherein a control device of the motor vehicle is configured to determine the target charging orientation in accordance with a tooth arrangement of the claw clutch.

7. The motor vehicle of claim 1 , wherein a control device of the motor vehicle is configured to set the target charging orientation by preloading the rotor.

8. The motor vehicle of claim 1 , further comprising at least two vehicle axles, wherein the decoupling device is assigned to that vehicle axle whose inverter is configured to carry out a charging operation.

9. The motor vehicle of claim 1 , further comprising at least one control device which is configured to control the at least one inverter in order to carry out the charging operation and/or to control the decoupling device and/or to control a separate locking device of the decoupling device.

10. The motor vehicle of claim 1 , further comprising at least one detection device, which is configured to detect a coupling state of the rotor.

11. The motor vehicle of claim 10 , wherein at least one control device is configured to change the target charging orientation if a change in a rotor position is detected during a charging operation.

12. A method for assembling at least a portion of a drive train of a motor vehicle, the method comprising:
coupling a drive train component to at least one electric machine, wherein the electric machine is connectable to an electric energy store that is chargeable with a charging interface from an external charging device,
wherein in a first state, the electric machine generates a torque which is transmittable to an output of the drive train,
wherein in a second state, the electric machine transmits current from a charging interface to an electric energy store,
wherein the motor vehicle includes a decoupling device which is configured to mechanically decouple the electric machine from the output in order to carry out a charging operation in a decoupling state,
wherein, in the decoupling state, a rotational movement of the rotor of the electric machine into a target charging orientation of the rotor is decoupled from the output of the drive train.

13. The method of claim 12 , wherein the decoupling device is configured to lock the rotor of the electric machine in the target charging orientation with a at least one of a locking device and by establishing the coupling to the output.

14. The method of claim 12 , wherein the decoupling device is configured to brace the rotor of the electric machine after the adoption of the target charging orientation by applying a defined preloading torque in the drive train.

15. The method of claim 12 , wherein the decoupling device has at least one claw clutch.

16. The method of claim 15 , wherein the claw clutch has from 30 to 70 teeth.

17. The method of claim 15 , wherein a control device of the motor vehicle is configured to determine the target charging orientation in accordance with a tooth arrangement of the claw clutch.

18. The method of claim 12 , wherein a control device of the motor vehicle is configured to set the target charging orientation by preloading the rotor.

19. The method of claim 12 , wherein the motor vehicle includes at least one detection device which is configured to detect a coupling state of the rotor.

20. The method of claim 19 , wherein at least one control device is configured to change the target charging orientation if a change in a rotor position is detected during a charging operation.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Peterseim Michael
• Prausse Felix
• Müller Gerhard

Classifications

• B60L53/00

  Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles · CPC title

• B60K7/0007

  the motor being electric · CPC title

• B60L2220/54

  Windings for different functions · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title