Wireless EV Charging Segment Switching With Two-Way RF Feedback
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Solution Overview
Problem
Current one-way communication methods for wireless charging of moving electric vehicles lack reliability confirmation and lead to communication failures due to increased signal surges, especially when multiple vehicles are charging simultaneously, and struggle with efficient segment switching based on RF signals.
Innovation Solution
Implementing a two-way RF communication system that includes periodic signal transmission, response signal checking, and segment switching based on high-speed communication location determination, using processors and memory to manage P2P communication controllers and vehicle controllers for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one-way communication transmission method is used for wireless charging, then the system is simple to implement, but communication reliability deteriorates due to lack of confirmation procedure and signal surges
Solution Approach 1:
The patent implements a two-way communication system where the power supply electronic device sends RF signals to the electric vehicle, and the vehicle responds with acknowledgment signals. This feedback mechanism allows the power supply device to confirm successful signal reception and transmission, eliminating the reliability issues of one-way communication while maintaining manageable system complexity through structured protocol design.
Solution Approach 2:
Instead of having the electric vehicle continuously transmit signals to the power supply device (one-way), the patent inverts the communication flow by having the power supply electronic device actively transmit RF signals and receive responses from the vehicle. This inversion reduces unnecessary signal transmission from the vehicle side and improves communication reliability through confirmed two-way interaction.
2Reliability
If electric vehicles continuously and periodically transmit signals, then the vehicle can maintain communication presence, but signal surges increase causing communication failures
Solution Approach 1:
The patent implements periodic RF signal transmission from the power supply electronic device at controlled intervals, with the electric vehicle responding only when needed. This periodic action maintains communication presence and location tracking while significantly reducing signal surges compared to continuous transmission, as signals are sent only during scheduled intervals rather than continuously.
Solution Approach 2:
The power supply electronic device performs preliminary location determination and segment switching based on RF signal responses before full charging operations begin. This preliminary action allows the system to prepare for upcoming vehicle arrivals and reduce the need for frequent signal exchanges during active charging, thereby reducing overall signal surge while maintaining reliable communication presence.
3Measurement precision
If segment switching is based on RF signal from electric vehicle, then the system can track vehicle location, but communication failures occur due to signal surge
Solution Approach 1:
The patent introduces an intermediary RF communication protocol between the power supply electronic device and the electric vehicle for location determination. Instead of relying on direct vehicle-initiated signals that cause surges, the system uses power supply device-initiated RF signals with structured response protocols, acting as an intermediary mechanism that maintains precise location tracking while stabilizing communication by controlling signal transmission timing and frequency.
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 approach reduces communication failures and enhances segment switching efficiency by decreasing signal generation from electric vehicles and ensuring reliable power transmission through accurate location-based segment control.
Implementation Method 1
transmitting a periodic RF signal through at least one supply power P2P communication controller by the supply power electronic device
Implementation Method 2
receiving an RF signal by a vehicle P2P communication controller of the electric vehicle
Data Source
AI summary
A method and device for wireless charging of electric vehicles, both stationary and in motion, is provided. Two-way RF communication establishes a dynamic link between the vehicle and the power supply, enabling real-time segment switching for efficient power delivery. The system actively assesses the vehicle's charging needs and location to optimize power transfer, reducing communication overhead and improving charging efficiency. This bidirectional 10 communication approach enhances the reliability and adaptability of wireless charging infrastructure for electric vehicles.