Server-Controlled EV Charging for Start-Time Completion
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Solution Overview
Problem
Existing charging systems for electric vehicles often fail to ensure that vehicles are fully charged by the user's starting time, leading to potential delays when the vehicle is needed.
Innovation Solution
A server system that estimates the charging completion time and switches from usual charging mode to rapid charging mode if the vehicle is not fully charged by the user's starting time, using a processor to acquire and analyze data on the vehicle's state of charge, travel route, and user schedule to ensure timely charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If usual charging mode is used, then energy consumption is lower and charging cost is reduced, but charging completion time exceeds the user's starting time
Solution Approach 1:
The charging device dynamically switches between usual charging mode and rapid charging mode based on real-time monitoring of charging progress and predicted user arrival time. This dynamic adjustment allows the system to optimize both energy consumption and charging completion time by adapting the charging rate to the specific situation.
Solution Approach 2:
The system performs preliminary estimation of the user's arrival time at the charging station and calculates the required charging amount in advance. Based on this preliminary action, the charging device proactively switches to rapid charging mode before the user arrives, ensuring the vehicle is fully charged by the time the user needs it.
2Loss of time
If rapid charging mode is used from the beginning, then charging completion time is reduced, but energy consumption and charging cost increase
Solution Approach 1:
The system applies partial rapid charging action by switching to rapid charging mode only for the portion of charging needed to reach full charge before the user's predicted arrival time. Once the required charge level is achieved, the system stops or reduces rapid charging, thereby avoiding excessive energy consumption while still meeting the timing requirement.
3Reliability
If charging starts earlier to ensure completion by starting time, then charging reliability is improved, but loss of time for other activities increases
Solution Approach 1:
The charging device continuously monitors the actual charging progress and compares it with the predicted charging trajectory. Based on this feedback, the system adjusts the charging mode in real-time, switching to rapid charging when needed to ensure reliable completion by the user's starting time, while minimizing unnecessary early charging that would waste time.
Data Source
AI summary
A server includes a processor configured to: acquire a starting time representing a time when a user starts to use a moving object including a rechargeable secondary battery; estimate a charging completion time by which a required amount of power is charged to the moving object; determine whether or not charging of the moving object is completed by the starting time based on the starting time and the charging completion time; and switch a charging mode of charging the moving object performed by a charging device from a usual charging mode to a rapid charging mode in a case where the charging of the moving object is not completed by the starting time.