EV Driving Range Display Using SOE Difference Correction
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Solution Overview
Problem
Existing methods for determining the driving range of electric vehicles are inaccurate, leading to unreliable initial display values, which affects user experience and planning.
Innovation Solution
The method corrects the initial display driving range by comparing the current State of Energy (SOE) value with the previously stored SOE value, using a preset difference range to determine if the current SOE should override the stored value, and incorporating historical data and real-time calculations to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the initial display driving range is determined using conventional methods (stored actual remaining driving range or real-time calculation), then the determination process is simple, but the accuracy of the driving range display is poor
Solution Approach 1:
The system performs preliminary action by storing the SOE value before powering-off during the last time. When the vehicle is powered on, this pre-stored value is immediately retrieved and compared with the current SOE value to determine whether to correct the initial display driving range, avoiding the need for complex real-time analysis and improving both accuracy and efficiency.
Solution Approach 2:
The system implements feedback by comparing the current SOE value with the previously stored SOE value. If the difference exceeds a preset threshold, the system feeds back by correcting the initial display driving range to the actual remaining driving range stored before the last powering-off, ensuring accurate display while maintaining simple processing logic.
2Reliability
If the initial display driving range is always updated to real-time calculated values, then the display reflects current state, but the accuracy deteriorates when real-time calculations are unreliable
Solution Approach 1:
The system uses feedback mechanism to compare current SOE value with previously stored SOE value. When the difference is within acceptable range, real-time calculation values are used; when the difference exceeds the threshold, the system feedbacks by switching to the more reliable stored actual remaining driving range value, thus maintaining both reliability and precision.
Solution Approach 2:
The system performs preliminary action by storing accurate SOE values and actual remaining driving range data before powering-off. This pre-stored reliable data serves as a backup that can be retrieved when real-time calculations become unreliable, ensuring continuous accuracy without complex validation processes.
Data Source
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AI summary
A method and apparatus for determining a driving range of an electric vehicle, and a vehicle. The method includes: S101: when the electric vehicle is powered on, calculating a current virtual SOE value of the electric vehicle; S102: comparing the current virtual SOE value and a stored virtual SOE value, wherein the stored virtual SOE value refers to a virtual SOE value that is stored before powering-off of last time of the electric vehicle; S103: if a difference between the current virtual SOE value and the stored virtual SOE value exceeds a preset difference range, determining an initially displayed driving range according to the current virtual SOE value; S104: if the difference between the current virtual SOE value and the stored virtual SOE value is within the difference range, determining an actual remaining mileage stored before the powering-off of last time of the electric vehicle to be the initially displayed driving range; and S105: displaying the initially displayed driving range. Accordingly, the method can increase the accuracy of the initially displayed driving range, and improve the usage experience of the electric vehicle by the user.