EV Charging Authentication Using VIN and Dynamic Vehicle State
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Solution Overview
Problem
The existing plug-and-charge charging solution for vehicles lacks sufficient safety mechanisms, as it relies solely on the vehicle identification number (VIN) for authentication, making it vulnerable to theft, embezzlement, and relay attacks, posing a risk to property safety.
Innovation Solution
A method that transmits the vehicle identification number and dynamic vehicle state information to a remote server for authentication, comparing the information to ensure the vehicle's identity and prevent unauthorized charging, using existing communication standards without modifying the charging connection assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only vehicle identification number is used for authentication, then charging operation is simple and convenient, but security against theft and relay attacks is insufficient
Solution Approach 1:
The authentication process is segmented into multiple independent verification steps: first verifying the vehicle identification number, then separately verifying dynamic state information (odometer reading, date/time, vehicle status), and finally confirming location match. Each segment acts as an independent security layer that must all pass for successful authentication.
Solution Approach 2:
The system performs preliminary verification of dynamic vehicle state information before authorizing charging. The server checks odometer readings, date/time stamps, and vehicle status data in advance to validate authenticity, preventing relay attacks by ensuring the information was captured at the actual charging location and time.
2Reliability
If additional authentication mechanisms are added, then security against theft and embezzlement is improved, but system complexity increases
Solution Approach 1:
The patent leverages existing multi-functional components in the vehicle and charging pile to perform authentication. The vehicle's existing communication module, odometer, date/time clock, and status sensors are used for security verification, while the charging pile's existing controller handles both charging control and authentication logic, eliminating the need for dedicated security hardware.
Solution Approach 2:
A centralized server acts as an intermediary between the vehicle and charging pile, handling all complex authentication logic and data verification. The server receives information from both parties, performs security checks against stored data, and returns authentication results, simplifying the on-vehicle and on-pile hardware requirements while maintaining high security.
3Measurement precision
If dynamic vehicle state information is transmitted and verified, then authentication accuracy is improved, but communication data transmission increases
Solution Approach 1:
The system extracts only the essential dynamic state information needed for authentication: odometer reading, date/time stamp, and key vehicle status flags. These specific parameters are selected and transmitted separately from other vehicle data, minimizing communication overhead while providing sufficient accuracy for security verification.
Data Source
AI summary
A method for authentication of charging a vehicle includes: transmitting a vehicle identification number and at least one vehicle state information from the vehicle to a charging pile after plugging a charging gun of the charging pile into the vehicle; sending, by the vehicle, its vehicle state information to a remote server; sending, by the charging pile, the vehicle identification number and the vehicle state information derived from the vehicle to the remote server; comparing the vehicle state information sent by the vehicle with the vehicle state information sent by the charging pile for the vehicle identification number in the remote server; and passing the authentication if at least one item in the vehicle state information matches. An additional safety mechanism is realized based on the existing communication standards, and ensures safety in a simple and reliable manner without modifying the charging connection assembly.