EV Charging Transponder System with Server Verification
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Solution Overview
Problem
Existing electric vehicle charging systems lack flexibility and security in managing varying user preferences for charging levels and time, and do not effectively prevent unauthorized use of charging transponders.
Innovation Solution
A portable transponder system that establishes communication between an electric vehicle and a charging station, verifies user registration through an internet server, and securely locks the charging cable, allowing users to select charging options based on State of Charge, time, or cost, while preventing unauthorized use by storing vehicle information and billing details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a portable transponder system with internet server verification is implemented, then security against unauthorized charging is improved, but device complexity increases
Solution Approach 1:
An internet server acts as an intermediary between the charging station and the transponder system. The server stores vehicle information and billing details, and verifies transponder IDs remotely, eliminating the need for complex local verification hardware at the charging station while maintaining high security standards.
Solution Approach 2:
The system uses the vehicle's existing onboard computer and communication capabilities to perform verification functions. The transponder leverages the vehicle's own systems for identification and authentication, reducing the need for additional dedicated security components.
2Adaptability or versatility
If multiple charging options (percentage, time, cost) are provided, then adaptability to user preferences is improved, but device complexity increases
Solution Approach 1:
The charging system dynamically adjusts parameters based on user selection. The onboard computer calculates and modifies charging current and duration in real-time according to the chosen option (percentage, time, or cost), allowing flexible adaptation without requiring multiple dedicated charging systems.
Solution Approach 2:
The system changes operational parameters (charging current, time duration, target charge level) based on user preferences. By modifying electrical parameters and control settings rather than requiring different hardware configurations, the system achieves versatility while maintaining relatively simple device architecture.
3Reliability
If cable locking mechanism is implemented, then reliability of charging connection is improved, but ease of operation deteriorates
Solution Approach 1:
The cable locking mechanism operates periodically based on charging status. The cable is locked during active charging to ensure connection reliability, and automatically unlocked when charging completes or is aborted. This periodic locking/unlocking cycle maintains both security and operational ease.
Solution Approach 2:
The system uses feedback from the charging status to control the locking mechanism. Sensors detect whether charging is active or complete, and this feedback automatically triggers the appropriate locking or unlocking action, eliminating the need for manual user intervention while maintaining ease of operation.
Data Source
AI summary
An Electric Vehicle (EV) charging system and method is disclosed. The system includes EV with a battery, charge control device, a portable transponder, a charging station with energy management device, a cable, a transmitter. The vehicle ID and SoC information is received from the vehicle, and the information is transmitted to the internet server along with charging station ID. The portable transponder is registered with the internet server which includes transponder ID and associated vehicles or vehicle IDs. Once the request for payment authorization is received from the charging station by the server, the server verifies the information and approves or denies the request. Upon approval of the request, the charging can commence. The portable transponder can be used for charging a second vehicle, as long as the second vehicle is also registered with the server.