A range estimation system
Patent Information
- Application Number
- EP2023913308
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-11-05
AI Technical Summary
Current range estimation systems for electric vehicles rely heavily on historical data and fail to accurately account for dynamic factors such as traffic conditions, weather, and driving mode, leading to imprecise remaining range calculations.
A system that incorporates a storage module to record statistical range factors by vehicle driving mode, a range factor calculation module to compute dynamic factors using real-time data, and an estimation calculation module to estimate range based on statistical, dynamic, and energy capacity data, with a limiting module to prevent infinite calculations.
Enables more accurate and real-time estimation of driving range by incorporating dynamic factors like traffic density, wind speed, and ambient temperature, providing personalized range estimates based on driving modes and vehicle-specific data, improving precision and user notification.
Smart Images
Figure 1.1
Abstract
Description
[0001] A RANGE ESTIMATION SYSTEM
[0002] Technical Field
[0003] The present invention relates to a system for estimating driving range of electric vehicles by including dynamic range factors in calculation of driving range.
[0004] Background of the Invention
[0005] Features of range estimation have been implemented in automotive control units for many years. Range estimation is more important in electric vehicles than in internal combustion engines. Although range estimation is generally made in electric vehicles based on the HV battery charge status and the average power consumption, it is quite difficult to estimate the remaining range precisely. Therefore, today there is a need for solutions which enable to realize a more real range estimation by calculating the remaining range without relying only on historical data.
[0006] The United States patent document no. US9612130, an application included in the state of the art, discloses a system and method for calculating an available driving distance by using different parameters. In the invention disclosed in the United States patent document no. US9612130, variations for example such as gridlock or accidents, which may lead to deviations in speed from the normal flow of traffic status such as traffic status, impact the calculation. Also, a weather status including at least one of air density, wind speed, wind direction, precipitation, and ambient temperature is communicated to the controller to inform the weather conditions at other locations. Further, vehicle to vehicle dynamic interactions may be observed through V2V communication. The predicted energy consumption profile is updated based on the current travel data. Barometric pressure, temperature, and precipitation each impact air density p, and each fluctuates based on weather changes and altitude. Data from external wireless sources can be used to augment the calculation and correct for variation in air density. Traffic pattern data may be communicated to a subject vehicle to inform a predicted travel speed, and / or stopping propensity along a particular route. In turn, these values may serve to adjust the expected travel time. Elevation changes may be determined using known geographical elevation data, and relative differences between various locations, m is total mass, where the vehicle mass is known and additional passenger mass and cargo mass may be accounted using an on-board weight sensor for example.
[0007] Summary of the Invention
[0008] An objective of the present invention is to realize a system for estimating driving range by analysing values such as target height, traffic density, wind speed, road speed limits, traffic lights on the road, ambient temperature, driving mode, statistical driving performance and charge condition of the HV battery.
[0009] Another objective of the present invention is to realize a system for calculating driving range in different driving modes of a driver, by using vehicle driving modes of a statistical driving history record as a base and then recording them.
[0010] Another objective of the present invention is to realize a system for using a default statistical range factor specific to the vehicle model in estimation of driving range, in cases where there is no statistical driving history record.
[0011] Detailed Description of the Invention
[0012] “A Range Estimation System” realized to fulfil the objectives of the present invention is shown in the figure attached, in which: Figure l is a schematic view of the inventive range estimation system.
[0013] The components illustrated in the figure are individually numbered, where the numbers refer to the following:
[0014] 1. System
[0015] 2. Storage module
[0016] 3. Range factor calculation module
[0017] 4. Estimation calculation module
[0018] 5. Limiting module
[0019] The inventive system (1) for estimating driving range of electric vehicles by including dynamic factors in a range estimation process, comprises at least one storage module (2) which is configured to keep record of the statistical range factor of drivers according to vehicle driving modes; at least one range factor calculation module (3) which is configured to be in communication with the storage module (2); to realize data exchange over this communication established; to calculate dynamic range factor by using data of target height, traffic density, wind speed, road speed limits, traffic lights on the road, ambient temperature once the vehicle starts driving; to query the historical statistical range factor in the storage module (2) at the same time as the vehicle starts driving; to use the range factor in calculations, if available; to use a default statistical range factor, if not available; to calculate energy consumption based on actual power consumption; to calculate travel distance; to carry out an average filtering process in energy consumption; to associate a statistical range factor with a driving mode and then to record it in the storage module (2); at least one estimation calculation module (4) which is configured to be in communication with the range factor calculation module (3); to estimate range by using data of statistical range factor, dynamic range factor, energy capacity and driving mode over this communication established; and at least one limiting module (5) which is configured to be in communication with the estimation calculation module (4); to receive the calculated range estimation over this communication established; and to make the assigned limitations.
[0020] The storage module (2) included in the inventive system (1) is a non-volatile memory (NvM), is in communication with the range factor calculation module (3), and is configured to share the statistical range factor calculated in the previous drives over this communication established. The storage module (2) is configured to record the statistical range factors separately according to driving modes.
[0021] The range factor calculation module (3) included in the inventive protective cover (1) is configured to be in communication with the storage module (2) and to query the statistical range factor last stored in the storage module (2), over this communication established according to driving mode. The range factor calculation module (3) is configured to use a statistical factor assigned according to the vehicle model, in the event that it cannot access the statistical range factor value recorded in the storage module (2). The range factor calculation module (3) is configured to calculate energy consumption based on actual power consumption and to calculate travel distance to average a modelling trigger. The range factor calculation module (3) is configured to average in energy consumption and to record the actual statistical range factor in the storage module (2) together with the driving mode information. The range factor calculation module (3) is also configured to update the actual statistical range factors of a vehicle in external servers.
[0022] The range factor calculation module (3) included in the inventive system (1) is configured to obtain target height, traffic density and road speed limits required to calculate the dynamic range factor, over GPS and / or map servers. The range factor calculation module (3) is configured to query wind speed and ambient temperature data on meteorology servers. The range factor calculation module (3) is configured to obtain data about traffic lights on the road over V2X lastly. The range factor calculation module (3) is configured to calculate dynamic range factor by using data of target height, traffic density, wind speed, road speed limits, traffic lights on the road, ambient temperature it obtains as a result of queries.
[0023] The estimation calculation module (4) included in the inventive system (1) is communication with the range factor calculation module (3) and is configured to calculate the driving range by using statistical range factor, dynamic range factor, HV battery energy status and vehicle driving mode information, over this communication established.
[0024] The limiting module (5) included in the inventive system (1) is configured to apply predetermined limits on the calculated range it obtains over the communication it establishes with the estimation calculation module (4), and to ensure that they are displayed on the vehicle. The said limiting module (5) is configured to prevent the range calculation from going infinite, in driving cases where the electric vehicle charges the battery
[0025] With the inventive system (1), it is possible to estimate the remaining range by analysing values such as target height, traffic density, wind speed, road speed limits, traffic lights on the road, ambient temperature, driving mode, statistical driving performance and charge condition of the HV battery in calculation of driving range. On the other hand, due to the fact that the record of statistical driving history is recorded on the basis of vehicle driving modes, the driver is notified of the remaining range in different driving modes.
[0026] Within these basic concepts; it is possible to develop various embodiments of the inventive “Range Estimation System (1)”; the invention cannot be limited to examples disclosed herein and it is essentially according to claims.
Claims
CLAIMS1. A system (1) for estimating driving range of electric vehicles by including dynamic factors in a range estimation process, characterized by at least one storage module (2) which is configured to keep record of the statistical range factor of drivers according to vehicle driving modes; at least one range factor calculation module (3) which is configured to be in communication with the storage module (2); to realize data exchange over this communication established; to calculate dynamic range factor by using data of target height, traffic density, wind speed, road speed limits, traffic lights on the road, ambient temperature once the vehicle starts driving; to query the historical statistical range factor in the storage module (2) at the same time as the vehicle starts driving; to use the range factor in calculations, if available; to use a default statistical range factor, if not available; to calculate energy consumption based on actual power consumption; to calculate travel distance; to carry out an average filtering process in energy consumption; to associate a statistical range factor with a driving mode and then to record it in the storage module (2); at least one estimation calculation module (4) which is configured to be in communication with the range factor calculation module (3); to estimate range by using data of statistical range factor, dynamic range factor, energy capacity and driving mode over this communication established; and at least one limiting module (5) which is configured to be in communication with the estimation calculation module (4); to receive the calculated range estimation over this communication established; and to make the assigned limitations.
2. A system (1) according to Claim 1; characterized by the storage module (2) which is a non-volatile memory (NvM) and is configured to be in communication with the range factor calculation module (3) and to share thestatistical range factor calculated in the previous drives over this communication established.
3. A system (1) according to Claim 1 or 2; characterized by the storage module (2) which is configured to record the statistical range factors separately according to driving modes.
4. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to be in communication with the storage module (2) and to query the statistical range factor last stored in the storage module (2), over this communication established according to driving mode.
5. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to use a statistical factor assigned according to the vehicle model, in the event that it cannot access the statistical range factor value recorded in the storage module (2).
6. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to calculate energy consumption based on actual power consumption and to calculate travel distance to average a modelling trigger.
7. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to average in energy consumption and to record the actual statistical range factor in the storage module (2) together with the driving mode information.
8. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to update the actual statistical range factors of a vehicle in external servers.
9. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to obtain target height, traffic density and road speed limits required to calculate the dynamic range factor, over GPS and / or map servers.
10. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to query wind speed and ambient temperature data on meteorology servers.
11. A system (1) according to according to any of the preceding claims; characterized by the range factor calculation module (3) which is configured to obtain data about traffic lights on the road over V2X.
12. A system (1) according to according to any of the preceding claims; characterized by the estimation calculation module (4) which is communication with the range factor calculation module (3) and is configured to calculate the driving range by using statistical range factor, dynamic range factor, HV battery energy status and vehicle driving mode information, over this communication established.
13. A system (1) according to according to any of the preceding claims; characterized by the limiting module (5) which is configured to apply predetermined limits on the calculated range it obtains over the communication it establishes with the estimation calculation module (4), and to ensure that they are displayed on the vehicle.
14. A system (1) according to according to any of the preceding claims; characterized by the limiting module (5) which is configured to prevent the range calculation from going infinite, in driving cases where the electric vehicle charges the battery.