Relating to range prediction in electric vehicles

Patent metadata

Field	Value
Publication number	US-12558973-B2
Application number	US-202418444230-A
Country	US
Kind code	B2
Filing date	Feb 16, 2024
Priority date	Jun 27, 2013
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A method of predicting the range of an electric vehicle comprises determining a range value during a current vehicle operating cycle using a first range model, wherein the first range model is dependent on an energy consumption rate value recorded during a previous vehicle operating cycle.

First claim

The invention claimed is:

1 . A method of determining a predicted range of an electric vehicle, the method comprising:
a vehicle supervisory controller determining a first current range value during a current vehicle operating cycle using a first range model; a battery control module indicating initial energy available in an energy store of the electric vehicle at a start of the current vehicle operating cycle and final energy available in the energy store at a current point in the current vehicle operating cycle; wherein determining the first current range value includes calculating a composite energy consumption rate value based on i) a current energy gradient value associated with the current vehicle operating cycle and ii) a stored energy gradient value recorded during a previous vehicle operating cycle, wherein the current energy gradient value is calculated as a ratio of a distance travelled during the current vehicle operating cycle and energy consumed during the current vehicle operating cycle as determined from the final energy available and the initial energy available; and wherein determining the first current range value includes calculating a product of the composite energy consumption rate value and the final available in an energy store of the electric vehicle; the first current range value being equal to the product of the composite energy consumption value and the final energy available in the energy store of the electric vehicle; and a display interface displaying a range metric to a user of the electric vehicle, the range metric determined based on the determined first current range value.

2 . The method of claim 1 , wherein the previous vehicle operating cycle is the immediately preceding vehicle running cycle and the stored energy gradient value is recorded at key-off of the immediately preceding vehicle running cycle.

3 . The method of claim 1 , wherein calculating the composite energy consumption rate value comprises calculating a difference between the current energy gradient value and the stored energy gradient value, filtering the difference, and adding the filtered difference to the stored energy gradient value.

4 . The method of claim 1 , wherein the range metric is further determined based on a dynamic vehicle model configured to determine a second range value based on one or more of the following parameters: vehicle speed, vehicle mass, drive-train efficiency, motor efficiency, vehicle drag coefficient, rolling resistance, air density, battery state of charge, battery temperature and battery energy and/or a state of charge model configured to determine a third range value based on a measured state of charge of vehicle battery and a state of charge gradient value.

5 . The method of any claim 1 , wherein the first range model is configured to calculate the first current range value based on a sensor determining whether a trailer is attached to the electric vehicle.

6 . The method of claim 1 , wherein the range metric includes a distance range value being indicative of a maximum distance that the electric vehicle can travel until the energy store of the electric vehicle is depleted and/or the range metric includes a time range value being indicative of a time for which the electric vehicle may remain operational until the energy store of the electric vehicle is depleted.

7 . The method of claim 6 , wherein the time range value is displayed to the user during a predetermined vehicle state.

8 . A processing system for an electric vehicle including a battery control module, an energy store, and a display interface, the processing system having a controller configured to implement a method of determining a predicted range of the electric vehicle, the controller configured to determine a first current range value during a current vehicle operating cycle using a first range model,
wherein the controller is configured to receive, from the battery control module, initial energy available in the energy store of the electric vehicle at a start of the current vehicle operating cycle and final energy available in the energy store at a current point in the current vehicle operating cycle; wherein determining the first current range value includes calculating a composite energy consumption rate value based on i) a current energy gradient value associated with the current vehicle operating cycle and ii) a stored energy gradient value recorded during a previous vehicle operating cycle, wherein the current energy gradient value is calculated as a ratio of a distance travelled during the current vehicle operating cycle and energy consumed during the current vehicle operating cycle as determined from the final energy available and the initial energy available; and wherein determining the first current range value includes calculating a product of the composite energy consumption rate value and final energy available in an energy store of the electric vehicle; the first current range value being equal to the product of the composite energy consumption rate value and the final energy available in the energy store of the electric vehicle; and wherein the controller is configured to display, via the display interface, a range metric to a user of the electric vehicle, the range metric determined based on the determined first current range value.

9 . The processing system of claim 8 , wherein the range metric is further determined based on a dynamic vehicle model configured to determine a second range value based on one or more of the following parameters: vehicle speed, vehicle mass, drive-train efficiency, motor efficiency, vehicle drag coefficient, rolling resistance, air density, battery state of charge, battery temperature and battery energy and/or a state of charge model configured to determine a third range value based on a measured state of charge of vehicle battery and a state of charge gradient value.

10 . The processing system of claim 8 , wherein the first range model is configured to calculate the first current range value based on a sensor determining whether a trailer is attached to the electric vehicle.

11 . The processing system of claim 8 , wherein the range metric includes a distance range value being indicative of a maximum distance that the electric vehicle can travel until the energy store of the electric vehicle is depleted and/or the range metric includes a time range value being indicative of a time for which the electric vehicle may remain operational until the energy store of the electric vehicle is depleted.

12 . The processing system of claim 11 , wherein the time range value is displayed to the user during a predetermined vehicle state.

13 . An electric vehicle including an energy store, an electric propulsion means, a battery control module, a display interface, and a processing system having a controller configured to implement a method of determining a predicted range of the electric vehicle, the controller configured to determine a first current range value during a current vehicle operating cycle using a first range model,
wherein the controller is configured to receive, from the battery control module, initial energy available in the energy store of the electric vehicle at a start of the current vehicle operating cycle and final energy available in the energy store at a current point in the current vehicle operating cycle; wherein determining the first current range value includes calculating a composite energy consumption rate value based on i) a current energy gradient value associated with the current vehicle operating cycle and ii) a stored energy gradient value recorded during a previous vehicle

Assignees

• Jaguar Land Rover Ltd

Inventors

• Grewal Karmjit
• Burrows Andrew

Classifications

• B60L58/12 Primary

  responding to state of charge [SoC] · CPC title

• Y02T10/7072

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

• B60W2552/20

  Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments · CPC title

• B60W40/13

  Load or weight · CPC title

• Y02T10/84

  Data processing systems or methods, management, administration · CPC title