Electric Vehicle State of Charge Display Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current state of charge displays in electric vehicles provide inaccurate information for extended periods due to integrative determination methods, leading to driver trust issues and incorrect assessment of battery status during vehicle operation.
Innovation Solution
A method and device that detect a driver's attentiveness parameter to perform a step correction of the state of charge display, allowing immediate or rapid correction to the correct state of charge value when the attentiveness parameter falls below a threshold, avoiding continuous sliding approximation and ensuring the driver is not surprised by the correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sliding approximation is used to correct the state of charge display, then driver trust is maintained, but the correction takes too long and provides incorrect information
Solution Approach 1:
The system dynamically adjusts the correction strategy based on driver attentiveness. When the driver is attentive, sliding approximation is used to maintain trust. When the driver is inattentive, step correction is applied to rapidly correct the display. This dynamic switching resolves the contradiction by adapting the correction method to the current operational context.
Solution Approach 2:
The system changes the correction parameter (from continuous sliding to discrete step correction) based on the driver's attentiveness state. This parameter change allows the system to switch between maintaining trust and achieving rapid correction, resolving the time-trust contradiction.
2Productivity
If step correction is applied immediately, then correction speed is improved, but driver trust is disrupted due to sudden changes
Solution Approach 1:
The system uses dynamic conditioning based on driver attentiveness to determine when to apply step correction. By making the correction method dependent on the driver's state, the system can apply fast correction only when it won't disrupt trust, resolving the speed-trust contradiction.
Solution Approach 2:
The system performs a preliminary check of driver attentiveness before applying step correction. This preliminary action prevents trust disruption by ensuring step correction is only applied when the driver is not observing the display, thus avoiding the negative effect while maintaining the benefit.
3Duration of action of moving object
If integrative determination is used during vehicle operation, then continuous monitoring is possible, but measurement precision deteriorates over time
Solution Approach 1:
The system performs a preliminary accurate measurement of the state of charge when the vehicle is stationary. This preliminary action establishes a reference value that can be used for subsequent corrections during operation, maintaining precision over extended monitoring periods.
Solution Approach 2:
The system uses feedback from stationary accurate measurements to correct the integrative determination during operation. By periodically updating the reference value from accurate stationary measurements, the system maintains measurement precision while enabling continuous monitoring during vehicle operation.
Data Source
AI summary
A method for correcting a state of charge of a state of charge display of a traction battery of an electrically driven vehicle. The method includes detecting an attentiveness parameter of a driver of the vehicle with respect to the state of charge display, and step correction of the state of charge displayed on the state of charge display if the attentiveness parameter undershoots an attentiveness threshold value.