Relating to range prediction in electric vehicles
AssigneeJaguar Land Rover Limited
InventorsKarmjit Grewal, Andrew Burrows
Life of this patent
Estimating the term…
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.
Claims16
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.
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.
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 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 the 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.
Dependencies are inferred from the claim text.