Wireless EV Charging Terminal Pairing Under Adjacent Coil Interference
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Solution Overview
Problem
Existing power stations for electric vehicles face challenges in efficiently managing the pairing between power terminals and electric vehicles due to interference from adjacent terminals, leading to incorrect pairing and increased complexity and cost with existing solutions that require dedicated hardware.
Innovation Solution
A method involving a power terminal with a terminal-side coil stage and an electric vehicle with a vehicle-side coil stage, capable of wireless communication, where the terminal powers its coil with a test electric quantity to determine pairing status, allowing efficient selection and pairing without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power terminals are installed at multiple parking spaces, then the power station can serve more electric vehicles simultaneously, but interference between adjacent terminals causes incorrect pairing and reduces pairing reliability
Solution Approach 1:
The patent segments the power station into multiple independent parking spaces, each with its own power terminal. Each terminal is assigned a unique identification code, allowing the system to manage multiple vehicles simultaneously while maintaining individual pairing integrity through spatial and identification-based segmentation.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit receives pairing status information from the power terminal and vehicle, processes this information, and provides control signals to establish or terminate power exchange. This feedback loop ensures accurate pairing by continuously monitoring and adjusting the pairing status based on received signals and identification codes.
2Reliability
If dedicated hardware (sensors, cameras, interfaces) is added to each power terminal for pairing management, then pairing reliability improves, but device complexity and implementation cost increase
Solution Approach 1:
The patent makes the control unit multi-functional by enabling it to perform both power exchange control and pairing management functions. The same control unit that manages power flow also handles pairing establishment, termination, and coordination, eliminating the need for separate dedicated hardware for pairing management.
Solution Approach 2:
The patent implements self-service pairing management where the control unit automatically coordinates pairing between power terminals and vehicles using identification codes and control signals. The system autonomously manages the pairing process without requiring additional dedicated sensors, cameras, or specialized interfaces, reducing hardware complexity while maintaining reliability.
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
This method enables accurate pairing of electric vehicles with the correct power terminal, reducing interference and implementation costs by eliminating the need for dedicated hardware, ensuring efficient power exchange.
Implementation Method 1
an inductive power terminal employs a coil placed on or embedded in a ground surface to inductively exchange electric power with a paired coil mounted on board an electric vehicle through the air gap between the ground surface and the vehicle itself
Data Source
AI summary
A method for pairing a power terminal and an electric vehicle in a power station for electric vehicles, wherein the method includes powering the terminal-side coil stage of a power terminal with a test electric quantity to determine whether the power terminal and an electric vehicle are in a paired condition, at which the power terminal and the electric vehicle can exchange electric power, or in an unpaired condition, at which the power terminal and the electric vehicle cannot exchange electric power.