EV Charge Status Display Using Stored Values During Power-Off
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Solution Overview
Problem
Existing electric vehicles face challenges in providing accurate and up-to-date charge status information without consuming unnecessary energy by keeping the traction motor system powered on, which affects vehicle range and user experience.
Innovation Solution
A method and system that operate the traction motor system in an active and inactive configuration, storing charging system values in a memory unit, and displaying this information on a display unit even when the system is inactive, using a low voltage ancillary battery to power the memory and display units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the traction motor system is kept powered on continuously to provide charge status information, then the availability of charge status information is improved, but the energy consumption increases and vehicle range decreases
Solution Approach 1:
The system performs preliminary actions by storing charge status information in memory before the traction motor system is powered off. This allows the information to be retained and displayed later without requiring the system to remain powered on, thus resolving the contradiction between information availability and energy consumption.
Solution Approach 2:
The invention creates a copy of the charge status information by storing it in memory. This copy can be displayed on the display unit without requiring the original traction motor system to be active, thereby maintaining information availability while reducing energy consumption when the system is inactive.
2Use of energy by moving object
If the traction motor system is powered on only when information is required, then the energy consumption is reduced, but the system response becomes sluggish and information availability is compromised
Solution Approach 1:
The system performs preliminary actions by continuously updating and storing charge status information in memory during normal operation. When the display unit needs this information, it is immediately available without requiring the traction motor system to be powered on, thus eliminating response delays while maintaining energy efficiency.
3Measurement precision
If the traction motor system is powered on continuously to provide real-time charge status, then the information accuracy is improved, but the vehicle range is reduced due to increased energy consumption
Solution Approach 1:
The invention creates and maintains a copy of the charge status information in memory. This copy accurately reflects the current state of the battery and charging system, allowing the display unit to show accurate information without requiring the traction motor system to remain powered on, thus preserving vehicle range while maintaining information accuracy.
Data Source
AI summary
The disclosure relates to a method for providing an indication of charge status of an electric vehicle comprising a traction motor system to a user, comprising: operating a traction motor system in an electric vehicle between an active and an inactive configuration; receiving a set of charging system values in a memory unit from the traction motor system and storing the set of charging system values in the memory unit while operating the traction motor system in the active configuration; providing the set of charging system values from the memory unit to a display unit; displaying information relating to the set of charging system values on the charge status on the display unit while operating the traction motor system in the inactive configuration. The disclosure further relates to a system for providing an indication of charge status of an electric vehicle.