Wireless Power Pairing With Compatibility Lists for Road Coils
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Solution Overview
Problem
In wireless power transfer systems where a ground-side supply device communicates with a traveling vehicle, the existing wide-area wireless communication for compatibility check and pairing leads to reduced responsiveness and increased traffic.
Innovation Solution
A system where the supply device and vehicle communicate via narrow-area wireless communication, with the server providing a compatibility list based on identification information, allowing direct pairing without wide-area communication, and utilizing position information to reduce traffic and enhance security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wide-area wireless communication is used for compatibility check and pairing between supply device and vehicle, then communication coverage is ensured, but responsiveness is reduced and traffic is increased
Solution Approach 1:
The communication process is segmented into two distinct phases: wide-area wireless communication for initial information exchange and compatibility verification, followed by narrow-area wireless communication for pairing and power transfer control. This segmentation allows each communication mode to be optimized for its specific function, improving overall responsiveness while reducing unnecessary wide-area traffic during pairing operations
Solution Approach 2:
The server acts as an intermediary that pre-processes compatibility information and provides it to the supply device before the vehicle arrives. This intermediary role allows the supply device to perform pairing operations using locally stored compatibility data rather than requiring real-time wide-area communication, thereby improving responsiveness and reducing traffic
2Reliability
If wide-area wireless communication is performed for compatibility check, then comprehensive vehicle information can be verified, but communication traffic between server and supply device increases
Solution Approach 1:
The server performs compatibility verification in advance by receiving vehicle information through wide-area communication before the vehicle reaches the supply device. The verified compatibility information is then stored and provided to the supply device, allowing pairing to proceed using pre-verified data without requiring additional wide-area communication during the actual pairing process
Solution Approach 2:
The compatibility verification function is extracted from the real-time pairing process and performed separately by the server in advance. This extraction allows the main pairing operation to use simplified narrow-area communication while the comprehensive verification is handled separately by the server, reducing traffic volume during critical pairing operations
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 configuration ensures high responsiveness and reduced traffic by eliminating the need for wide-area wireless communication during pairing, while improving compatibility checking and security through narrow-area communication and compatibility tokens.
Implementation Method 1
a primary coil installed on a road; a secondary coil that receives power transferred from the primary coil in a non-contact manner
Data Source
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AI summary
A wireless power transfer system according to the present invention includes: a supply device having a primary coil installed on a road; a vehicle having a secondary coil that receives power transferred in a non-contact manner from the primary coil; and a server communicably connected to the supply device and the vehicle by wide-area wireless communication, in which the supply device transmits identification information of the supply device to the server before receiving a signal from the vehicle by narrow-area wireless communication, the server transmits a compatibility list including a combination of the compatible supply device and vehicle to the supply device on the basis of identification information of the supply device and information of the vehicle, and the supply device performs pairing with the vehicle on the basis of the compatibility list in a case of receiving the signal from the vehicle by the narrow-area wireless communication.