Network-Controlled EV Charging System with Smartlet LAN Integration
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Solution Overview
Problem
The limited availability of recharging facilities for electric vehicles, the need for efficient communication networks for managing peak load leveling through Demand Response and Vehicle-to-Grid (V2G) systems, and the requirement for accurate electricity consumption measurement and taxation pose challenges in the widespread adoption of electric vehicles.
Innovation Solution
A network-controlled charging system using Smartlets, which are electrical outlets connected via a LAN to a data control unit and a server, enabling wireless communication between electric vehicle operators and Smartlets, allowing for real-time power grid load management, payment processing, and vehicle-to-grid functionality, utilizing various communication devices and technologies such as RFID, WPAN, and WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If recharging facilities are sparsely distributed, then infrastructure complexity is reduced, but vehicle usability and accessibility deteriorate
Solution Approach 1:
The electrical outlet is designed to serve multiple functions: it can charge electric vehicles, provide power to grid during peak demand periods, and communicate with various stakeholders through integrated communication devices. This multi-functionality allows sparse facilities to handle diverse needs, improving accessibility without proportionally increasing infrastructure complexity
Solution Approach 2:
The outlet incorporates automated control capabilities where the controller can autonomously manage charging sessions, communicate with utility companies about demand conditions, and coordinate with vehicle operators without requiring constant human intervention. This self-service aspect reduces operational complexity while enhancing facility availability
2Productivity
If real-time communication network is implemented for Demand Response and V2G, then grid load management efficiency is improved, but system complexity increases
Solution Approach 1:
The outlet controller acts as an intermediary device that receives demand response signals from utility companies and translates them into appropriate charging actions. It also mediates communication between vehicle operators and the grid, consolidating multiple communication functions into a single component to manage network complexity while maintaining high management efficiency
Solution Approach 2:
The system implements continuous feedback loops where the controller monitors grid demand conditions, communicates with the utility company, adjusts charging rates accordingly, and reports back to vehicle operators. This automated feedback mechanism improves load management efficiency without requiring complex manual coordination systems
3Measurement precision
If electrical outlet is continuously monitored and controlled, then electricity consumption measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The controller integrates multiple functions including current monitoring, consumption calculation, communication with utility companies, vehicle operator interaction, and charging control into a single device. This consolidation improves measurement accuracy by centralizing monitoring functions while managing complexity through functional integration rather than separate components
Data Source
AI summary
A server of a network-controlled charging system for electric vehicles receives a request for charge transfer for an electric vehicle at a network-controlled charge transfer device, determines whether to enable charge transfer, and responsive to determining to enable charge transfer, transmits a communication to the network-controlled charge transfer device that indicates to the network-controlled charge transfer device to enable charge transfer.