Vehicle HMI Display Control for Battery Station Wait Times
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Solution Overview
Problem
Users misunderstand the waiting times for battery charging and replacement facilities due to similar waiting line lengths being displayed with the same color icons, despite differing service times.
Innovation Solution
A display control method that calculates waiting times based on the number of vehicles and time required for charging or replacing batteries, and displays facilities in modes reflecting these times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If waiting line length is used as the only display criterion for facility congestion, then the display is simple and uniform, but users cannot accurately understand the actual waiting time difference between charging and replacement facilities
Solution Approach 1:
The patent changes the display parameter from单纯 waiting line length to waiting time (which incorporates both waiting line length and service time). This allows the display to reflect the actual user experience more accurately, showing that a short waiting line at a replacement facility (5 min service) differs significantly from a short waiting line at a charging facility (30 min service), thereby resolving the information loss without requiring complex additional displays
2Reliability
If the same color icon is used for facilities with the same waiting line length, then the display is consistent and easy to implement, but users may misunderstand that facilities have the same degree of congestion and waiting time
Solution Approach 1:
The patent applies local quality by making the display characteristics (color icons) dependent on the specific facility type and its service time characteristics. Instead of a uniform display rule for all facilities, the system tailors the color coding to reflect local conditions - charging facilities and replacement facilities with the same waiting line length receive different color indicators based on their different service times, thereby improving reliability while maintaining operational simplicity
Data Source
AI summary
A display control method is a display control method that is performed by an ECU of a vehicle that controls an HMI for displaying information on a charging station and a replacing station of a battery mounted on the vehicle and a CPU of a management server. The display control method includes the steps of: calculating, by the CPU of the management server, a waiting time using the number of waiting vehicles at the charging station or the replacing station and the time required to charge or replace a battery per vehicle; controlling, by the ECU of the vehicle, the HMI to display the information on the charging station or the replacing station in a predetermined display mode according to the calculated waiting time.