EV Charging Wait Time Calculation Without Dedicated Vehicle Devices
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Solution Overview
Problem
Existing systems for calculating charging wait time for electric vehicles at charging stations require a dedicated communication device on the vehicle, limiting their ability to calculate wait times for vehicles without such equipment.
Innovation Solution
A system that uses cameras at charging stations to acquire and store charging information and identification data, allowing for the calculation of wait times without the need for a dedicated onboard device, by associating vehicle identification with charging data and using past charging trends to estimate wait times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated communication device is equipped in the electric vehicle to collect battery information, then the charging wait time can be calculated accurately, but the system complexity and cost increase
Solution Approach 1:
The patent introduces a charging station as an intermediary device that collects battery information from the electric vehicle during charging operations. The charging station's controller stores this information and uses it to calculate charging wait times, eliminating the need for dedicated communication devices in each vehicle. This mediator approach allows accurate wait time calculation while reducing vehicle equipment complexity.
Solution Approach 2:
The charging station performs self-service by automatically collecting battery information from connected vehicles, storing it in its own memory, and using this data to calculate wait times for multiple vehicles. This eliminates the need for each vehicle to have its own dedicated communication device, as the charging station serves itself and multiple vehicles through centralized information collection and processing.
2Measurement precision
If a dedicated communication device is equipped in every electric vehicle for battery information collection, then individual vehicle charging wait time can be calculated, but the cost and ease of operation deteriorate
Solution Approach 1:
The charging station's controller is designed with multi-functionality, serving as both a charging device and a wait time calculation system. It collects battery information from any connected vehicle, stores it in its memory, and calculates wait times for multiple vehicles using this centralized data. This universal approach allows individual vehicle wait time calculation without requiring each vehicle to have specialized equipment, thereby improving ease of operation.
3Device complexity
If past charging information is stored and utilized in the information storage, then charging wait time can be calculated without dedicated vehicle devices, but the system requires more information storage capacity
Solution Approach 1:
The charging station collects and stores battery information from vehicles during charging operations in advance. This preliminary action of gathering and storing data during normal charging processes enables the system to calculate wait times for future vehicles without requiring them to have dedicated communication devices. The pre-stored information serves as a reference for accurate wait time calculation while reducing vehicle equipment requirements.
Data Source
AI summary
Each time the charging of an electric vehicle is executed at a charging station, charging information is acquired which is information on a charged capacity by one charging or a time required for one charging, and identification information of the electric vehicle is acquired. Each charging time, the acquired charging information and the acquired identification information are stored in an information storage unit so that they are associated with each other. The identification information of an electric vehicle is acquired which is waiting for charging at a charging station as a calculation object for which a charging wait time is calculated. The charging information corresponding to the acquired identification information of the electric vehicle waiting for charging is extracted from the stored charging information. The charging wait time at the charging station as the calculation object is calculated on the basis of the extracted charging information.