SAFETY DEVICE AND SAFTEY SYSTEM FOR A MOTOR VEHICLE HAVING AN ADDITIONAL DRIVE BATTERY COUPLING, AND METHOD

Abstract

Provided is a security device for a motor vehicle for automatically moving a device of the motor vehicle in a predefined driving situation, including an electric motor for moving the device and a first current supply interface that can be electrically coupled to an on-board current supply system of the motor vehicle. The security device includes a second current supply interface for electrically coupling the electric motor to a drive battery of the motor vehicle. The second current supply interface includes a switching device with switching for electrically coupling the electric motor to the drive battery depending on the predefined driving situation. Furthermore, provided is a security system with several security devices and a method for operating such a security system.

Claims

1. A security device for a motor vehicle for automatically moving a device of the motor vehicle in a predefined driving situation, comprising an electric motor for moving the device and a first current supply interface that can be electrically coupled to an on-board current supply system of the motor vehicle, wherein the security device comprises a second current supply interface for electrically coupling the electric motor to a drive battery of the motor vehicle, wherein the second current supply interface comprises a switching device, and the switching device comprises switching means for electrically coupling the electric motor to the drive battery depending on the predefined driving situation.

2. The security device according to claim 1, wherein the second current supply interface comprises switching means for electrically coupling the electric motor to a drive battery of the motor vehicle which is designed as a high-voltage drive battery.

3. The security device according to claim 2, wherein the second current supply interface comprises a resistor such that a predominant part of the voltage of the high-voltage drive battery drops at the second current supply interface.

4. The security device according to claim 1, wherein the switching device comprises a voltage converter for converting the voltage of the drive battery to a lower voltage, in particular to a voltage of the on-board current supply system.

5. The security device according to claim 1, wherein the switching device comprises consideration means for considering a current acceleration, a current deceleration, a predicted acceleration or a predicted deceleration of the motor vehicle as a predefined driving situation.

6. The security device according to claim 1, wherein the switching device comprises comparison means for comparing a current driving situation with the predefined driving situation and for activating an increased switching readiness position when a predefined proximity of the current driving situation to the predefined driving situation is determined.

7. The security device according to claim 1, wherein the electric motor is designed as an electric flat motor.

8. The security device according to claim 1, wherein the security device comprises a determination device for determining a resistance opposing the operation of the electric motor, wherein the switching device comprises decoupling means for electrically decoupling the electric motor from the drive battery upon determination of a resistance exceeding a resistance threshold value.

9. The security device according to claim 1, wherein the security device is designed as a seat belt tensioning system, a seat adjustment system, a sunroof system, a comfort system or a steering wheel adjustment system.

10. A security system for a motor vehicle, wherein the security system comprises several security devices for a motor vehicle for automatically moving a device of the motor vehicle in a predefined driving situation, comprising an electric motor for moving the device and a first current supply interface that can be electrically coupled to an on-board current supply system of the motor vehicle, wherein the security device comprises a second current supply interface for electrically coupling the electric motor to a drive battery of the motor vehicle, wherein the second current supply interface comprises a switching device, and the switching device comprises switching means for electrically coupling the electric motor to the drive battery depending on the predefined driving situation.

11. The security system according to claim 10, wherein the switching devices comprise coordination means for time-delayed electric coupling of the respective electric motors of the security devices to the drive battery of the motor vehicle.

12. The security system according to claim 10, wherein the switching devices (7) comprise occupancy means for electrically coupling the respective electric motors (2) of the security devices (1) to the drive battery (6) of the motor vehicle depending on a detected seat occupancy of the motor vehicle.

13. The security system according to claim 10, wherein the security system comprises a detection device for detecting a driving situation of the motor vehicle.

14. A method for operating a security system for a motor vehicle wherein the security system comprises several security devices for a motor vehicle for automatically moving a device of the motor vehicle in a predefined driving situation, comprising an electric motor for moving the device and a first current supply interface that can be electrically coupled to an on-board current supply system of the motor vehicle, wherein the security device comprises a second current supply interface for electrically coupling the electric motor to a drive battery of the motor vehicle, wherein the second current supply interface comprises a switching device, and the switching device comprises switching means for electrically coupling the electric motor to the drive battery depending on the predefined driving situation, comprising the following steps: detecting a current driving situation of the motor vehicle by means of a detection device, comparing the detected current driving situation with a predetermined driving situation by means of the switching device or a controlling device of the security device, and electric coupling of an electric motor to the drive battery of the motor vehicle by means of the switching device when the detected current driving situation corresponds to the predetermined driving situation.

15. The method according to claim 14, wherein a resistance counteracting the electric motor is determined by means of a determination device, wherein the electric motor is electrically decoupled from the drive battery by means of the switching device if the resistance exceeds a predetermined resistance threshold value.

16. The security device according to claim 1, wherein the switching device comprises a voltage converter for converting the voltage of the drive battery to a voltage of the on-board current supply system.

Description

[0041] A security device according to the invention for a motor vehicle for automatically moving a device of the motor vehicle in a predefined driving situation, a security system according to the invention for a motor vehicle and a method according to the invention for operating a security system for a motor vehicle are explained in more detail below with reference to the figures. The figures show schematically in each case:

[0042] FIG. 1 a preferred first embodiment of a security device according to the invention in a side view,

[0043] FIG. 2 a preferred first embodiment of a security system according to the invention in a side view, and

[0044] FIG. 3 a flow chart of a preferred embodiment of a method according to the invention.

[0045] Elements with the same function and mode of operation are each given the same reference signs in FIGS. 1 to 3.

[0046] In FIG. 1, a preferred first embodiment of a security device 1 according to the invention is shown schematically in a side view. The security device 1 comprises an electric motor 2 designed as an electric flat motor and an optional controlling device 12 for controlling the electric motor 2. The electric motor 2 is designed for moving a device, in particular a seat belt or a belt tensioner, a vehicle seat or a seat adjustment of the seat components or the like, of a motor vehicle not shown. The electric motor 2 is electrically coupled to an on-board current supply system 3 of the motor vehicle via a first current supply line 13 of a first current supply interface 4 of the security device 1. In this preferred embodiment, the electric motor 2 is electrically coupled to the on-board current supply system 3 via the controlling device 12. Furthermore, the electric motor 2 can be electrically coupled to a drive battery 6 of the motor vehicle, which is designed as a HV drive battery, via a second current supply line 14, an optional voltage converter 8 and a switching device 7 of a second current supply interface 5 of the security device 1. The electric coupling of the electric motor 2 to the drive battery 6 can be established as well as disconnected by means of the switching device 7. In this preferred embodiment, the electric coupling of the electric motor 2 to the drive battery 6 takes place via the controlling device 12. According to the invention, it can also be provided that the electric motor 2 can be electrically coupled directly to the drive battery 6 via the second current supply interface 5. Furthermore, the security device 1 comprises a determination device 9 for determining a resistance which counteracts a rotation of the electric motor 2. By means of the determination device 9, it can be determined, for example, when the device to be moved has reached an end position or a specific position.

[0047] FIG. 2 shows a preferred first embodiment of a security system 10 according to the invention schematically in a side view. In this embodiment, the security system 10 comprises four security devices 1 according to the invention, which are indicated by dashed boxes for the sake of clarity. Furthermore, the security system 10 comprises a detection device 11 for detecting a driving situation of the motor vehicle. The detection device 11 is coupled to the security devices 1 in such a way that data of the determined driving situations are provided to the security devices 1.

[0048] In FIG. 3, a preferred embodiment of a method according to the invention for operating a security system 10 according to the invention for a motor vehicle is shown schematically in a flow diagram. In a first method step 100, a current driving situation of the motor vehicle is detected by means of a detection device 11 of the security system 10. This is done, for example, by evaluating camera data, radar data, speed sensor data, acceleration sensor data or the like. In a second method step 200, the detected current driving situation is compared with a predetermined driving situation by means of the switching device 7 or a controlling device 12 of the security device 1. The result of the comparison is that a predetermined driving situation is currently present or not. If a predetermined driving situation is present, an electric coupling of the electric motor 2 of the security device 1 to the drive battery 6 of the motor vehicle takes place in a third method step 300 by means of the switching device 7. This provides additional electric energy to the electric motor 2, so that a current power of the electric motor 2 is increased as a result.

LIST OF REFERENCE SIGNS

[0049] 1 security device [0050] 2 electric motor [0051] 3 on-board current supply system [0052] 4 first current supply interface [0053] 5 second current supply interface [0054] 6 drive battery [0055] 7 switching device [0056] 8 voltage converter [0057] 9 determination device [0058] 10 security system [0059] 11 detection device [0060] 12 controlling device [0061] 13 first current supply line [0062] 14 second current supply line [0063] 100 first method step [0064] 200 second method step [0065] 300 third method step