Method for operating an assistance system of a vehicle with at least one electrical energy store

Abstract

Method for operating an assistance system of a vehicle with at least one electrical energy store, comprising the following steps: detecting a temperature of the electrical energy store of the vehicle by means of at least one first sensor, identifying an operating state of the electrical energy store by means of the detected temperature of the electrical energy store by a control unit, determining the position of the vehicle and/or detecting an operating parameter of the vehicle more particularly by means of at least one second sensor, communicating the operating state to the assistance system of the vehicle, wherein at least one signal is generated by the assistance system in the case of an abnormal operating state of the electrical energy store if the position of the vehicle is within a predefinable geographical area.

Claims

1. A method for operating an assistance system of a vehicle having at least one electrical energy store, the method comprising: detecting a temperature of the electrical energy store of the vehicle by means of at least one first sensor; identifying, with a control unit, an operating state of the electrical store using the detected temperature of the electrical energy store; determining a position of the vehicle, detecting an operating parameter of the vehicle, or both by means of at least one second sensor; transmitting the operating state to the assistance system of the vehicle; and in the event of an abnormal operating state of the electrical energy store, generating at least one signal if the position of the vehicle lies within a definable geographic region, wherein the at least one signal prevents restarting of the drive system of the vehicle as long as the electrical energy store is in an abnormal operating state and the position of the vehicle lies within the definable geographic region.

2. The method as claimed in claim 1, characterized in that the signal initiates an instantaneous intervention for reducing a speed of the vehicle.

3. The method as claimed in claim 1, characterized in that the signal initiates deceleration of the vehicle by means of a braking intervention.

4. The method as claimed in claim 1, characterized in that the signal initiates isolation of the electrical energy store from a drivetrain of the vehicle.

5. The method as claimed in claim 1, characterized in that the signal initiates an emergency running mode of the vehicle at a reduced drive power.

6. The method as claimed in claim 1, characterized in that the signal initiates switching-on a hazard warning system of the vehicle.

7. The method as claimed in claim 1, characterized in that the signal initiates an emergency call to an emergency call center.

8. The method as claimed in claim 1, characterized in that the signal triggers at least one selected from the group consisting of a visual, acoustic and haptic warning to a driver of the vehicle.

9. The method as claimed in claim 1, characterized in that the signal is transmitted by wired means, by and/or wireless means, or a combination of both.

10. The method as claimed in claim 1, characterized in that the position of the vehicle is determined using a satellite-based technique, a cellular-network based technique, or a combination of both by means of a control unit of the vehicle, by means of a navigation system of the vehicle, by means of a smartphone of the driver, or a combination of both.

11. The method as claimed in claim 1, characterized in that the operating parameter is selected from the group consisting of the speed of the vehicle, a wheel speed, an instantaneous request by the driver of the vehicle, a charging or discharging current of the electrical energy store, an external temperature, a steering angle, a transverse acceleration of the vehicle, and a combination of two or more of the foregoing.

12. An assistance system comprising at least one control unit, the control unit configure to detect a temperature of the electrical energy store of a vehicle by means of at least one first sensor; identify, with a control unit, an operating state of the electrical store using the detected temperature of the electrical energy; determine a position of the vehicle, detecting an operating parameter of the vehicle, or both by means of at least one second sensor; transmit the operating state to the assistance system of the vehicle; and in the event of an abnormal operating state of the electrical energy store, generate at least one signal if the position of the vehicle lies within a definable geographic region, and wherein the at least one signal prevents restarting of the drive system of the vehicle as long as the electrical energy store is in an abnormal operating state and the position of the vehicle lies within the definable geographic region.

13. The assistance system of claim 12, wherein the vehicle having at least one selected from the group consisting of a lithium-ion battery, a lithium-sulfur battery, and a lithium-air battery.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Exemplary embodiments of the invention are explained in greater detail in the following description and depicted in the drawing, in which:

(2) FIG. 1 is a flow diagram of an embodiment of the method according to the invention; and

(3) FIG. 2 shows an embodiment of the assistance system according to the invention.

DETAILED DESCRIPTION

(4) The same reference signs denote the same device components in all the figures.

(5) FIG. 1 shows a flow diagram of an embodiment of the method according to the invention for operating an assistance system of a vehicle having at least one electrical energy store. The method is started in step S1, for example when the vehicle starts.

(6) In step S2, a temperature of the electrical energy store of the vehicle is detected by means of at least one sensor, for instance by a temperature sensor. The detected temperature is transmitted by wired and/or wireless means to a control unit, for example to a control unit of the vehicle and/or to a smartphone.

(7) Detected temperatures are advantageously de-bounced by the sensor or the control device in order to reduce a number of possible false alarms.

(8) In step S3, the control unit uses the detected temperature of the electrical energy store to identify an operating state of the electrical energy store, for example if a charging process and/or discharging process for the electrical energy store is in progress, the electrical energy store is being operated in the normal operating state, or the electrical energy store is in an abnormal, critical operating state.

(9) An abnormal operating state exists, for example, if the temperature of the electrical energy store exceeds a defined threshold value of 200 C. and is highly likely to cause a fire in the electrical energy store.

(10) In step S4, a position of the vehicle is determined using a satellite-based and/or cellular-network based technique by means of a control unit of the vehicle, by means of a navigation system of the vehicle and/or by means of a smartphone of the driver.

(11) In another embodiment, at least one operating parameter of the vehicle is detected, for instance a speed of the vehicle.

(12) In step S5, the identified operating state is transmitted to the assistance system by wired means, for instance a message by means of a CAN bus of the vehicle, and/or by wireless means, for example an encrypted message by means of short-range radio communication.

(13) In step S6, the assistance system checks whether the electrical energy store has an abnormal operating state and whether the position of the vehicle lies within a definable geographic region, and in step S6 a signal is generated. If the electrical energy store does not have an abnormal operating state and/or the position lies outside a definable geographic region, the method is continued in step S2.

(14) The method is terminated in step S7 as soon as the vehicle is switched off, once a charging process at a charging station is finished after the vehicle is switched off, and/or after a predefined time interval.

(15) In an alternative embodiment, the method is continuously repeated cyclically if the position of the switched-off vehicle lies within the definable geographic region, so that an emergency call is initiated even for a switched-off vehicle as soon as an abnormal operating state exists, for example by overheating of the electrical energy store during a charging process.

(16) FIG. 2 shows an assistance system 1 of a vehicle having at least one electrical energy store 2. A sensor 3 detects a temperature of the electrical energy store 2 and transmits this temperature by wired and/or wireless means to a control unit, for example to a control unit of the motor vehicle and/or to a smartphone. The control unit 4 identifies an operating state of the electrical energy store 2 and transmits said state to the assistance system 5 of the vehicle. The assistance system 5 generates a signal, for example the assistance system sends an electronic message to an emergency braking system 6 of the vehicle, if a position of the vehicle detected by a sensor 7 lies within a definable geographic region.

(17) In another embodiment, the signal triggers a visual, acoustic and/or haptic notification to a driver of the vehicle, so that the driver can take suitable action.