METHOD AND SYSTEM FOR PREVENTING THE DRIVING OF AN ELECTRICALLY DRIVEN VEHICLE

Abstract

A method is provided for preventing the driving of an electrically driven vehicle, having an electrical energy source and at least one electrical machine for a driving operation of the vehicle, between which there is arranged at least one switch, wherein electrical energy is exchanged between the electrical energy source and the electrical machine when the at least one switch is closed, includes, in the event that the driving of the vehicle is to be prevented, relaying a command designed for this purpose to a controller of the vehicle and receiving the command, by the controller, whereupon the at least one switch is opened by the controller if the vehicle is in a safe, nonmoving condition.

Claims

1. A method for preventing driving of an electric vehicle, the electric vehicle having an electrical energy source and at least one electrical machine for a driving operation of the vehicle, between which there is arranged at least one switch, wherein electrical energy is exchanged between the electrical energy source and the electrical machine when the at least one switch is closed, the method comprising: in the event that the driving of the vehicle is to be prevented, relaying a command designed for this purpose to a controller of the vehicle; and upon receipt of the command by the controller, opening the at least one switch by the controller if the vehicle is in a safe, nonmoving condition.

2. The method according to claim 1, wherein the driving of the vehicle should be prevented if the vehicle has been stolen.

3. The method according to claim 1, wherein the vehicle is in the safe, nonmoving condition if its speed is zero at least after a defined time interval expires.

4. The method according to claim 1, wherein the command is relayed from a device inside the vehicle to the controller of the vehicle.

5. The method according to claim 1, wherein the electrical energy source comprises a high-voltage system.

6. A system for preventing driving of an electric vehicle, wherein the vehicle has an electrical energy source and at least one electrical machine for a driving operation of the vehicle, the system comprising: at least one switch arranged between the electrical energy source and the at least one electrical machine, wherein electrical energy is exchanged between the electrical energy source and the electrical machine when the at least one switch is closed; and a controller; wherein, in the event that the driving of the vehicle is to be prevented, a command designed for this purpose can be relayed to the controller, the controller configured to receive the command and, upon receipt of the command, to open the at least one switch if the vehicle is in a safe, nonmoving condition.

7. The system according to claim 6, in which the at least one switch is designed as a contactor.

8. The system according to claim 6, in which the at least one switch is arranged in an access-secured housing and/or is installed in the vehicle inaccessible from the outside.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0024] FIG. 1 shows in schematic representation an example of a vehicle for which one embodiment of a method can be carried out with an embodiment of a system.

DETAILED DESCRIPTION

[0025] The vehicle 2 shown schematically in FIG. 1 is designed here and designated as a motor vehicle and it comprises, as components, a controller 4, an electrical energy source 6 and an electrical machine 8. The embodiment of the system for this vehicle 2 comprises, besides the controller 4, also a switch 10, which is arranged between the electrical energy source 6 and the electrical machine 8.

[0026] It is provided here that the electrical energy source 6 and the electrical machine 8 comprise a high-voltage system. If the switch 10 located or arranged in between is closed, the electrical energy source 6 and the electrical machine 8 are electrically connected to each other. It is possible for the electrical energy source 6 and the electrical machine 8 to exchange electrical energy across the closed switch 10, the electrical machine 8 being provided with electrical energy from the electrical energy source 6, which is converted in turn by the electrical machine 8 into mechanical energy, and the vehicle 2 is driven or propelled with this mechanical energy of the electrical machine 8. If the switch 10 is or becomes open, a connection between the electrical energy source 6 and the electrical machine 8 is interrupted. The electrical energy source 6 is designed, e.g., as a high-voltage circuit and in one embodiment it is integrated in an onboard electrical network of the vehicle 2, which is operated on the high-voltage system, the electrical energy source 6 being usually designed as a battery or storage cell and thus being an electrical energy accumulator or a fuel cell.

[0027] Independently of this, the controller 4 is connected to an energy accumulator, not otherwise represented here, at a low-voltage system, by which the controller 4 is also supplied with electrical energy independently of the energy source 6 shown here.

[0028] FIG. 1 furthermore shows a mobile or portable terminal device 12 as a device which can also be used outside the vehicle 2 and independently of the vehicle 2. In the embodiment of the method which is presented here, it is provided that the vehicle 2 and the terminal device 12 belong to a possessor or owner. If the vehicle 2 is abducted and thus stolen from the possessor of the vehicle 2, he or she has the possibility, in the embodiment of the method, to use his or her terminal device 12 and relay a command 14 to the controller 4 of the vehicle 2 via a radio-based communication link. A signal for transporting this command 14 from a communication module of the terminal device 12 to a communication module of the vehicle 2 is sent by radio. The terminal device 12 is configured here as a further component of the proposed system.

[0029] As soon as the controller 4 has received the command 14, it checks the movement condition of the vehicle 2. If the controller 4, for example by evaluating the current operating parameters, such as kinematic parameters describing the movement of the vehicle 2, detects and/or demonstrates, with sensor support, that the vehicle 2 is stationary at least for a defined interval of time after its last movement and finds itself in a safe, nonmoving condition, the switch 10 between the electrical energy source 6 and the electrical machine 8 is opened and a driving, usually a continued driving of the vehicle 2, is prevented.

[0030] If the controller 4 receives the command 14 during the driving or movement of the vehicle 2, the controller 4 will open the switch 10, once the vehicle 2 has come to a stop, only after the expiration of the defined interval of time and only then prevent the further driving. It is provided that the vehicle 2 will only be in the safe, nonmoving condition if it is not moved or has not been moved at least during the defined interval of time, and in a further embodiment if it is or has been parked with a parking brake, for example.

[0031] German patent application no. 10 2021 116773.6, filed Jun. 30, 2021, to which this application claims priority, is hereby incorporated herein by reference, in its entirety. Aspects of the various embodiments described above can be combined to provide further embodiments. These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.