EV Charging Management System Optimizing Station Wait Times
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Solution Overview
Problem
Conventional charging management systems for electric vehicles (EVs) only determine charging schedules for individual EVs without considering the waiting times and situations of other EVs, leading to inefficient use of shared charging stations.
Innovation Solution
A charging management system that collects vehicle and facility information to calculate arrival times and battery levels, recommending charging stations with the shortest maximum wait time for multiple EVs, thereby optimizing charging schedules across all EVs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If charging schedules are determined for individual EVs without considering other EVs, then the charging schedule determination is simple, but the waiting time at charging stations increases and charging station utilization becomes inefficient
Solution Approach 1:
The patent merges the charging schedule determination for multiple EVs into a single integrated optimization process. Instead of determining schedules individually, the system simultaneously considers all EVs requesting charging at a charging station, combining their requirements into one comprehensive scheduling problem that minimizes total waiting time and improves station utilization efficiency.
Solution Approach 2:
The charging station server acts as an intermediary that receives charging requests from multiple EVs, calculates optimal charging schedules considering all vehicles' battery levels, charging speeds, and arrival times, then distributes the determined schedules back to each EV. This intermediary coordination enables efficient multi-EV scheduling without requiring complex direct communication between all EVs.
2Productivity
If charging schedules are determined considering all EVs at charging stations, then the waiting time and charging efficiency improve, but the calculation complexity and system complexity increase
Solution Approach 1:
The patent segments the charging management system into distinct functional modules: EV terminal devices that collect battery information, charging station equipment that provides charging services, and a charging station server that performs centralized schedule optimization. This segmentation allows complex multi-EV scheduling to be handled by a dedicated server while keeping individual EV devices and charging equipment relatively simple.
Solution Approach 2:
The charging station server serves as a centralized intermediary that handles the complex calculations for optimizing multiple EV charging schedules. By concentrating the computational complexity in this intermediary component, the system achieves high charging station utilization efficiency while keeping individual EV terminals and charging equipment simple and manageable.
3Productivity
If more EVs are served at the same charging station, then the overall charging efficiency improves, but the waiting time for each individual EV increases
Solution Approach 1:
The patent implements dynamic charging schedule optimization that adapts to the specific characteristics of each EV (battery capacity, charging speed requirements, arrival time) and the current state of the charging station. The system dynamically adjusts charging assignments and time slots to balance the number of EVs served with individual waiting times, rather than using fixed or static scheduling rules.
Solution Approach 2:
The system changes key parameters such as charging start times, charging power levels, and service sequence based on real-time conditions. By optimizing these parameters for each EV while considering the overall station workload, the system achieves high overall charging efficiency while minimizing individual waiting times through coordinated parameter adjustment across all served vehicles.
Data Source
AI summary
According to one embodiment, there is provided a charging management system. Based on an estimated duration from a time when an electric vehicle having arrived at each of a charging facilities starts charging until the charging is complete, the system determines the charging facility a charging facility utilization of which is to be recommended to be one of the charging facilities related to a path to a destination which has a shortest maximum wait time from a time when a plurality of electric vehicles arrive at the charging facility until the charging is complete, and reports information indicative of the determined charging facility to the electric vehicle not having arrived at the charging facility.