BLE Power Control for Faster Qi Wireless Charging Feedback
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Solution Overview
Problem
Current wireless power transfer systems face challenges in efficiently and quickly processing time-sensitive power control information between devices, particularly due to limitations in in-band communication methods which result in delayed charging state determination and dynamic power control.
Innovation Solution
The implementation of Bluetooth Low Energy (BLE) communication to transmit and receive Qi packets between wireless power transmitters and receivers, enabling faster and safer power control by using BLE packets to exchange control error and received power information with timestamping for efficient data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If in-band communication method is used for power control, then power transfer is achieved, but processing speed of time-sensitive power control information is delayed
Solution Approach 1:
The patent introduces BLE (Bluetooth Low Energy) communication as an intermediary channel for transmitting power control information between the wireless power transmitter and receiver. This separate communication path allows time-sensitive control data to be exchanged independently from the power transfer process, eliminating the delay inherent in using in-band communication and enabling faster charging state determination.
2Productivity
If in-band communication is used, then communication between transmitter and receiver is established, but dynamic power control efficiency is reduced
Solution Approach 1:
BLE serves as a mediator for rapid exchange of power control commands and status information. The transmitter can send dynamic power adjustment instructions to the receiver through BLE, and the receiver can promptly report its charging state, enabling efficient real-time power control without the timing constraints of in-band communication.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver continuously reports power control information (such as charging state, temperature, and power level) to the transmitter through BLE. This rapid feedback loop enables the transmitter to dynamically adjust power delivery in real-time, improving overall power control efficiency and responsiveness.
Data Source
AI summary
The present disclosure provides a method, performed by a wireless power receiver, for receiving wireless power in a wireless power transmitting system, and an apparatus using the method, the method comprising: transmitting, to a wireless power transmitter, a configuration packet including a field regarding availability of out-of-band (OB) of the wireless power receiver; receiving, from the wireless power transmitter, a capability packet including a field regarding availability of OB of the wireless power transmitter; and establishing a Bluetooth low energy (BLE) connection with the wireless power transmitter on the basis of the configuration packet and the capability packet, wherein the wireless power receiver transmits a first BLE packet including a plurality of Qi packets to the wireless power transmitter through the LBE connection, and the wireless power receiver receives a response related to the first BLE packet from the wireless power transmitter through the BLE connection.