EV Drive Power Warning Display at Driving Readiness
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Solution Overview
Problem
Existing systems for monitoring vehicle battery states in electric vehicles only monitor battery states and not available drive power, leading to insufficiently precise determination of available drive power and unnecessary driver warnings.
Innovation Solution
A method and system that detect measurement values for determining the latest output of an energy storage device in an electric vehicle, calculate the latest peak and continuous output, compare these outputs with threshold values, and display a warning message only when the outputs fall below the threshold during an attempt to establish driving readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery states are monitored continuously, then reliability of safety monitoring is improved, but device complexity and energy consumption increase
Solution Approach 1:
The system performs preliminary checks of battery states during vehicle startup before full operation begins. By assessing battery capacity, temperature, and charge level during the startup phase, the system ensures safety monitoring is in place before the vehicle operates, reducing the need for continuous complex monitoring during normal operation.
Solution Approach 2:
The monitoring system operates periodically at key moments such as vehicle startup, mode changes, and when threshold values are approached, rather than continuously. This periodic assessment maintains reliability for safety-critical moments while significantly reducing device complexity and energy consumption compared to continuous monitoring.
2Loss of information
If warning messages are displayed frequently, then driver awareness of battery status is improved, but ease of operation deteriorates due to driver distraction
Solution Approach 1:
The system provides targeted information based on the specific battery issue and driving context. Instead of generic frequent warnings, it displays specific messages about capacity, temperature, or charge level problems only when relevant to the current situation, maintaining driver awareness without causing unnecessary distraction.
Solution Approach 2:
The system applies a threshold-based approach where warning messages are displayed only when battery parameters exceed or fall below predetermined thresholds. This partial action ensures warnings are given when truly necessary for safety while avoiding excessive messages that would distract the driver during normal operation.
3Reliability
If available drive power is determined precisely, then reliability of performance assessment is improved, but measurement precision requirements increase system complexity
Solution Approach 1:
The system uses a multi-functional approach to determine available drive power by combining assessments of battery capacity, temperature, and charge level into a single comprehensive evaluation. This universal method provides reliable performance assessment without requiring separate complex measurement systems for each parameter.
Solution Approach 2:
The system dynamically adjusts the assessment of available drive power based on changing battery parameters such as temperature and charge level. By monitoring how these parameters change and adjusting the available power calculation accordingly, the system achieves reliable performance assessment without needing ultra-precise measurement equipment.
Data Source
AI summary
A method and system for displaying a warning message to warn of insufficient available drive power for use in an electric vehicle, comprising the steps of a detection of measurement values for determining a latest output of an energy storage device of the electric vehicle via a detection unit, a determination of a latest peak output and/or continuous output of the energy storage device on the basis of the detected measurement values via a processing unit, a comparison of the latest peak output and/or continuous output with a threshold value of the peak output and/or continuous output via the processing unit, a display of a warning message by a display when the peak output and/or continuous output falls below the threshold value, wherein the method is not initiated until an attempt is made to establish driving readiness.