Electrified Motor Vehicle With a Display Unit for Displaying at Least One Residual Range

Abstract

An electrified motor vehicle includes a display unit for displaying at least one residual range, a high-voltage accumulator, and at least one electronic control unit which determines an expected minimum range on the basis of the state of charge of the high-voltage accumulator and which determines, on the basis of the temperature of the high-voltage accumulator and the state of charge of the high-voltage accumulator, a temperature-dependent bonus range which is displayed instead of the minimum range if the minimum range has dropped to zero.

Claims

1. to 7. canceled

8. An electrified motor vehicle comprising: a display unit for displaying at least one residual range; a high-voltage accumulator; and at least one electronic control unit which determines an expected minimum range based on a state of charge of the high-voltage accumulator and which determines a temperature-dependent bonus range based on a temperature of the high-voltage accumulator and the state of charge of the high-voltage accumulator, wherein the bonus range is displayed instead of the minimum range if the minimum range has fallen to zero.

9. The electrified motor vehicle according to claim 8, wherein the bonus range is displayed in addition to the minimum range if the minimum range has not yet fallen to zero.

10. The electrified motor vehicle according to claim 8, wherein in addition to the bonus range, a request to externally charge the vehicle is displayed when the vehicle is next switched off if the minimum range has fallen to zero.

11. The electrified motor vehicle according to claim 8, wherein in addition to the bonus range, a request to externally charge the vehicle is displayed when the vehicle is next switched off only if the minimum range has fallen to zero and, after switching off the vehicle, cooling of the high-voltage accumulator to a temperature which means that it is no longer possible to start the electric vehicle is predetermined.

12. The electrified motor vehicle according to claim 8, wherein the bonus range is reset when switching off the vehicle.

13. The electrified motor vehicle according to claim 8, wherein the bonus range is reset when restarting the vehicle if the temperature of the high-voltage accumulator is lower during the restart than during a previous switching off of the vehicle.

14. An electronic control unit for an electrified motor vehicle having a display unit for displaying at least one residual range and a high-voltage accumulator, wherein the electronic control unit is configured to: determine an expected minimum range based on a state of charge of the high-voltage accumulator, and determine a temperature-dependent bonus range based on a temperature of the high-voltage accumulator and the state of charge of the high-voltage accumulator, wherein the bonus range is displayed instead of the minimum range if the minimum range has fallen to zero.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG. 1 schematically shows the display strategy according to an exemplary embodiment of the invention which has been modified in comparison with the display strategy according to the prior art.

[0031] FIG. 2a shows an additional bonus range display if the approved range has not yet been used up.

[0032] FIG. 2b shows an alternative bonus range display if the approved range has been used up.

[0033] FIG. 3 schematically shows a display strategy according to the prior art.

DETAILED DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 schematically shows determination of an expected minimum range on the basis of the state of charge SOC of the high-voltage accumulator, which can be displayed as an approved range R_0. This determination is at least partly independent of the high-voltage accumulator temperature T_HVS, that is to say here above a particular high-voltage accumulator temperature T_HVS_S. In an optimization range BM above the particular high-voltage accumulator temperature T_HVS S, a temperature-dependent bonus range R_1 is additionally determined on the basis of the temperature T_HVS of the high-voltage accumulator and the state of charge SOC of the high-voltage accumulator. This bonus range R_1 is displayed in the optimization range BM.

[0035] FIGS. 2a and 2b show the components which are most important for the electrified motor vehicle according to an exemplary embodiment of the invention: a display unit A in the form of a combination instrument with two display regions A1 and A2, a high-voltage accumulator HVS and an electronic control unit S which may simultaneously be the drive motor control device. The control unit S determines the approved range R_0 and the temperature-dependent bonus range R_1, as described above.

[0036] In FIG. 2a, the bonus range R_1 is displayed in the display region A2 in addition to the minimum range R_0 if the minimum range R_0 has not yet fallen to 0 km, as displayed in the display region A1.

[0037] In FIG. 2b, the bonus range R_1 is displayed in the display region A1 instead of the minimum range R_0 if the minimum range R_0 has fallen to 0 km.

[0038] Furthermore, in addition to the bonus range R_1, a request is output in FIG. 2b indicating that external charging should be carried out when the vehicle is next switched off. In this case, this request may always be made, in a first alternative, if the minimum range R_0 is zero or, in a second alternative, only when cooling of the high-voltage accumulator to a temperature which means that it is no longer possible to start the electric vehicle is predetermined after the vehicle has been switched off. This predetermination of the temperature may be carried out, for example, by coupling the control unit S to an electronic weather report. FIG. 1 illustrates, by way of example, the temperature-dependent state of charge SOC after each of four journeys F1 to F4. After the journey F3, a first situation is illustrated in which, despite cooling of the high-voltage accumulator HVS after the motor vehicle has been switched off, a start is possible. After the journey F4, a second situation is illustrated in which, despite cooling of the high-voltage accumulator HVS after the motor vehicle has been switched off, a start is no longer possible. The request for charging after the end of the journey according to FIG. 2b would therefore be made at least after the journey F4.

[0039] In a first alternative, the display of the bonus range R_1 is preferably always reset when the vehicle is switched off. In a second alternative, the display of the bonus range R_1 can preferably be reset only when restarting the vehicle if the temperature T_HVS of the high-voltage accumulator HVS is lower during the restart than during the previous switching off of the vehicle.