Wireless Charging Swap Detection via In-Band and Out-Band Links
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Solution Overview
Problem
Current wireless power transfer systems face challenges in establishing reliable communication between wireless power transmitters and receivers, particularly in detecting swapping events during power transmission, which can lead to potential damage to new devices or objects placed on the transmitter.
Innovation Solution
Implementing a method that allows wireless power transmitters and receivers to use both in-band and out-band communication to establish a communication channel, enabling the detection of swapping events by transmitting a swapping query message through one communication method and receiving a response through another, ensuring safe power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only in-band communication is used for swapping detection, then communication simplicity is maintained, but detection reliability is insufficient
Solution Approach 1:
The patent introduces out-band communication as an intermediary channel to assist in-band communication for swapping detection. When in-band communication fails to detect a swap or provides unreliable detection, the out-band communication channel serves as a mediator to transmit swapping query messages and receive response messages, thereby improving detection reliability without completely replacing the original communication system.
Solution Approach 2:
The patent adds another dimension to the communication system by introducing out-band communication as a separate frequency channel. This dimensional expansion allows the system to perform swapping detection through multiple independent channels, enabling cross-validation and improving reliability while maintaining the original in-band communication for normal operations.
2Measurement precision
If dual communication channels are implemented for swapping detection, then detection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic selection and switching between in-band and out-band communication channels based on detection needs. The system can adaptively choose which channel to use for transmitting swapping query messages and receiving response messages, optimizing detection accuracy while managing system complexity through flexible, context-dependent channel selection rather than rigid dual-channel operation.
Solution Approach 2:
The system uses feedback mechanisms where the outcome of swapping detection attempts on one channel influences the selection of channels for subsequent detection. If in-band communication yields inconclusive results, the system feedbacks this information and switches to or supplements with out-band communication, creating a closed-loop system that improves detection accuracy while avoiding unnecessary complexity through intelligent channel management.
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 ensures accurate detection of swapping events, preventing damage to new devices or objects and ensuring safe and efficient power transfer by combining in-band and out-band communication methods.
Implementation Method 1
receives, from the wireless power transmitter, the wireless power by magnetic coupling with the wireless power transmitter at an operating frequency
Implementation Method 2
communicates with the wireless power transmitter using at least one an in-band communication using the operating frequency and an out-band communication using a frequency other than the operating frequency
Data Source
AI summary
A wireless power receiving device according to an embodiment of the present specification is a wireless power receiving device that receives wireless power from a wireless power transmission device. The wireless power receiving device: receives wireless power from the wireless power transmission device at an operating frequency through magnetic coupling with the wireless power transmission device; communicates with the wireless power transmission device using at least one of in-band communication using the operating frequency and out-band communication using a frequency other than the operating frequency; transmits a swap inquiry message to the wireless power transmission device through one of the in-band communication and the out-band communication; and receives a response message to the swap inquiry message from the wireless power transmission device through the other of the in-band communication and the out-band communication, and determines whether to swap the wireless power transmission device.