Wireless Charging Communication Switching for Stable Power Transfer
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Solution Overview
Problem
During wireless charging, unstable alignment and rapid load changes in electronic devices can lead to unreliable in-band communication, causing wireless charging to stop and increasing heat generation, which affects charging speed.
Innovation Solution
Implementing a control circuit that dynamically switches between in-band and out-band communication frequencies based on communication error detection, ensuring stable data sharing and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If in-band communication is used during wireless charging, then data transmission efficiency is improved, but communication stability deteriorates when alignment is unstable or load changes rapidly
Solution Approach 1:
The system dynamically changes the communication frequency parameter by switching between in-band communication (first frequency band) and out-band communication (second frequency band) based on detected communication errors or alignment stability, thereby adapting to different operational conditions to maintain both efficiency and reliability
2Reliability
If out-band communication is used continuously, then communication stability is improved, but heat generation increases
Solution Approach 1:
The system employs periodic switching between in-band and out-band communication modes rather than continuous out-band operation, allowing the device to benefit from stable out-band communication when needed while returning to lower-power in-band communication during stable periods, thereby reducing overall heat generation
3Temperature
If heat control measures are implemented, then heat generation is suppressed, but wireless charging speed decreases
Solution Approach 1:
The communication scheme acts as an intermediary mechanism that indirectly controls heat generation by optimizing power transfer efficiency and reducing communication-related thermal load, thereby suppressing heat without directly interfering with the power transfer process and maintaining charging speed
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
Prevents data loss and suppresses heat generation by dynamically switching communication schemes, thereby improving wireless charging speed and reliability.
Implementation Method 1
An electronic device includes a wireless charging function based on a magnetic induction scheme, a magnetic resonance scheme, or an electromagnetic wave scheme of charging a battery of an external electronic device by wirelessly transferring power to the external electronic device
Implementation Method 2
a first communication circuit supporting first communication in a first frequency band, a second communication circuit supporting second communication in a second frequency band different from the first frequency band
Data Source
AI summary
An electronic device is provided. The electronic device includes a first communication circuit, a second communication circuit, a power transmission coil, and a control circuit. The control circuit is configured to connect an external electronic device and the first communication circuit, transmit power to the external electronic device, receive, from the external electronic device, a first signal including a control error packet (CEP) at a first time point, after the first point in time, count a first number of times a specified unit time elapses without the first signal being received, if the first number of times corresponds to a specified first threshold value, transmit, to the external electronic device, a second signal for requesting a second communication connection, and connect the external electronic device and the second communication based on reception of a third signal including a response of the external electronic device to the second signal.