EV Charging Network Server Notification Relay
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Solution Overview
Problem
Current electric vehicle charging systems lack efficient mechanisms for transmitting notification messages to subscribers and hosts regarding charging status, authorization, and network operations, leading to potential inefficiencies and unauthorized access.
Innovation Solution
A networked electric vehicle charging system that utilizes a server to relay messages between charging stations and a wide area network, enabling authorized access, monitoring, and notification through a data control unit, RFID readers, and communication devices, allowing for secure and efficient charging sessions and load management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a networked charging system with server relay is implemented, then notification delivery and authorization management are improved, but device complexity and system infrastructure requirements worsen
Solution Approach 1:
A server acts as an intermediary between charging stations, subscribers, and hosts. The server receives notification messages from charging stations, manages message routing, and delivers notifications to appropriate recipients. This centralizes communication management, improving reliability while abstracting the complexity from individual charging stations.
Solution Approach 2:
The notification system is segmented into distinct functional components: message generation at charging stations, relay through the server, and delivery to subscribers/hosts. This segmentation allows each component to be optimized independently and simplifies troubleshooting and maintenance.
2Object-affected harmful factors
If RFID-based authorization is implemented, then access control security is improved, but potential unauthorized access through RFID cloning or theft worsens
Solution Approach 1:
The system implements feedback mechanisms where the server verifies RFID authorization requests against registered subscriber information. The server can detect suspicious patterns, log access attempts, and provide feedback to charging stations to deny suspicious access attempts. This creates a closed-loop security system that adapts to potential threats.
Solution Approach 2:
Subscriber RFID information is pre-registered and stored in the server database before actual charging sessions. The server performs preliminary verification of RFID tags against the registered database, preventing unauthorized access before charging begins. This preliminary action establishes a security baseline that protects against RFID cloning and theft.
3Loss of time
If real-time notification messages are transmitted to subscribers and hosts, then operational awareness and response time are improved, but network communication requirements and energy consumption worsen
Solution Approach 1:
The system transmits notification messages periodically or event-driven rather than continuously. Charging stations send notifications at key events (charging start, completion, errors) rather than maintaining constant communication. This reduces network traffic and energy consumption while maintaining timely awareness of important events.
Solution Approach 2:
The system implements selective notification delivery where only relevant subscribers and hosts receive specific notifications. Not all system participants are notified of all events - notifications are filtered and directed only to those with relevant interests or responsibilities. This partial action reduces overall network communication load while maintaining operational awareness for those who need it.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures secure and efficient charging operations by authorizing users, managing load on the grid, and providing timely notifications to subscribers and hosts, enhancing the overall management and utilization of electric vehicle charging infrastructure.
Implementation Method 1
prospective customers typically request service from the charging station (e.g., by waving a radio-frequency identification (RFID) device near a RFID receiver on the charging station)
Data Source
AI summary
An electric vehicle charging station network server that manages a plurality of charging stations receives subscriber notification message preferences for a subscriber (e.g., electric vehicle operator) that indicate one or more events of interest for which the subscriber wishes to receive notification messages. A set of one or more contact points associated with the subscriber is also received. The server receives data associated with the subscriber that indicates that a charging session at one of the charging stations has been established for an electric vehicle associated with the subscriber. The server detects an event of interest for the subscriber and transmits a notification message for that event to at least one of the set of contact points associated with the subscriber.