EV Charging Pilot Conductor Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electric vehicle charging infrastructure lacks a simple and efficient method for public charging stations to accurately determine and bill energy consumption in real-time, similar to traditional fueling stations, while ensuring safe and regulated charging processes.
Innovation Solution
A communication method between electric vehicles and charging stations using a mechanical and electrically conductive connection, employing a pilot conductor for vehicle identification and power supply management, including pulse width modulation and cryptographic key-based authentication to ensure secure and efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical and electrically conductive connection is used between charging station and electric vehicle, then data exchange for correct billing and safe charging is enabled, but the complexity of the charging process increases
Solution Approach 1:
The patent introduces a pilot conductor as an intermediary element that facilitates communication between the charging station and electric vehicle. This pilot conductor carries identification signals and control information, enabling reliable data exchange for billing and safety purposes without requiring complex direct communication protocols between the power conductors themselves.
Solution Approach 2:
The mechanical connection element serves multiple functions simultaneously: it provides structural support, establishes electrical power transmission paths, and incorporates the pilot conductor for communication. This multi-functionality reduces the need for separate dedicated communication hardware, thereby managing complexity while maintaining reliability.
2Object-affected harmful factors
If vehicle identification and authentication are implemented before power supply, then misuse and damage risks are minimized, but the charging time is increased
Solution Approach 1:
The patent implements preliminary identification and authentication actions through the pilot conductor before enabling power supply. The charging station sends a trigger signal via the pilot conductor, receives vehicle identification, verifies authorization, and only then activates the power conductors. This preliminary sequence prevents misuse while the system optimizes the process to minimize time loss.
Solution Approach 2:
The authentication process is designed to proceed rapidly through predefined verification steps using cryptographic keys and identification protocols. Once the vehicle is identified and authorized, the system rushes through the power activation sequence without unnecessary delays, minimizing the time penalty imposed by security measures.
3Reliability
If cryptographic key-based authentication is used, then security against unauthorized access is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the cryptographic authentication logic into a dedicated communication protocol layer that operates independently through the pilot conductor. This separation allows the complex cryptographic operations to be isolated from the power supply control logic, managing overall system complexity while maintaining high security standards for vehicle identification and authorization.
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
Enables easy, secure, and timely charging with correct billing, minimizing misuse and damage risks by ensuring only authorized and approved charging currents flow, adapting to vehicle and station specifications, and preventing unauthorized access.
Implementation Method 1
a pilot conductor for vehicle identification and power supply management
Implementation Method 2
a mechanical and electrically conductive connection between the charging station and the electric vehicle
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
A method for communicating with an electric vehicle is described, including generating a first predetermined DC voltage level on a pilot conductor, recognizing the existence of an electric connection to an electric vehicle by detecting a second predetermined DC voltage level on the pilot conductor, transmitting an actuation signal on the pilot conductor, detecting a vehicle identification signal on the pilot conductor, and opening the power supply on a power conductor.