Secure EV Charging via Operator Parameter Segmentation
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Solution Overview
Problem
Current electric vehicle charging systems lack the ability to accommodate operator-specific preferences and secure, private data exchange between electric vehicles and charging stations, limiting flexibility and fairness in charging practices among multiple users.
Innovation Solution
A method of location-based charging that allows electric vehicle supply equipment to receive and process operator-specific parameters, enabling variable charging rates and secure communication through encryption, distinguishing between home and guest users, and internal versus external roaming charging, using smart cards and pseudonym IDs for authentication and billing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If operator-specific parameters and preferences are implemented in the charging system, then charging flexibility and user customization are improved, but data security and privacy protection requirements increase
Solution Approach 1:
The system segments data into two categories: public data (charging parameters, billing information) and private data (operator preferences, personal information). This segmentation allows flexible data exchange for charging operations while protecting sensitive operator-specific parameters through selective disclosure and encryption mechanisms.
Solution Approach 2:
The patent introduces an intermediary authentication mechanism that mediates between the EV operator and EVSE. This intermediary verifies operator identity and authorizes data exchange, enabling charging flexibility while maintaining data security through controlled access to operator-specific parameters.
2Productivity
If multiple users with different preferences access the same electric vehicle, then vehicle utilization is improved, but the ability to set and manage user-specific preferences deteriorates
Solution Approach 1:
The system implements universal authentication that works across multiple users and vehicles. Each operator has their own authenticated profile with stored preferences, allowing any authorized user to access the vehicle and automatically have their specific preferences applied, thus maintaining ease of operation while improving vehicle utilization.
Solution Approach 2:
The system enables self-service preference management where each operator's preferences are automatically retrieved and applied based on their authentication credentials. Users can manage their own preferences through the service portal without interfering with other users' settings, making preference management easy even with multiple users.
3Device complexity
If data exchange between PEV and EVSE is limited to embedded control parameters, then system complexity is reduced, but the ability to exchange operator-specific parameters deteriorates
Solution Approach 1:
The system dynamically adapts the data exchange protocol based on authentication status. After successful authentication, the system transitions from basic embedded control parameter exchange to enhanced exchange that includes operator-specific parameters and preferences, thereby increasing data exchange capability without permanently increasing system complexity.
Solution Approach 2:
The patent changes the parameter set exchanged between PEV and EVSE based on the operational phase. In the authentication phase, only essential control parameters are exchanged. After authentication, additional parameters including operator preferences, billing information, and vehicle-specific settings are exchanged, enhancing versatility without requiring the system to handle all parameters simultaneously.
Data Source
AI summary
The method of location-based charging for electric vehicles provides for secure charging of electric vehicles by applying various charging mechanisms depending on users' and suppliers' specific attributes. When an operator of an electric vehicle connects the electric vehicle to electric vehicle supply equipment, a message is securely received by the electric vehicle supply equipment, which includes a set of operator-specific parameters. Based on the set of operator-specific parameters, a secure notification is transmitted to an owner of the electric vehicle supply equipment requesting authorization for the operator to charge the electric vehicle. The applicable charging mechanism of the electric vehicle is applied based on the owner's authorization message transmitted to the electric vehicle supply equipment and the set of operator-specific parameters.