BLE Out-of-Band Power Control for Multi-Device Wireless Charging
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in efficiently managing power control and device compatibility between multiple devices, leading to potential overvoltage issues and unstable charging due to varying power classes and communication protocols.
Innovation Solution
Implementing a method and apparatus that utilize Bluetooth Low Energy (BLE) out-of-band communication to exchange power control data between wireless power transmitters and receivers, enabling dynamic power management and safe, rapid identification of charging status across multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power transfer systems use multiple devices with varying power classes and communication protocols, then device compatibility and power distribution capability are improved, but power control stability and overvoltage prevention become difficult to manage
Solution Approach 1:
The patent introduces an intermediary communication layer (out-of-band communication channel) that mediates between multiple devices with different power classes and the power distribution system. This intermediary channel enables standardized power control data exchange, allowing the system to manage diverse devices reliably without direct coupling between device variability and power control stability.
2Productivity
If the system exchanges power control data rapidly between transmitter and receiver, then charging speed and power management efficiency are improved, but communication reliability and safety may be compromised
Solution Approach 1:
The patent segments the communication system into two independent channels: in-band communication for power transfer and out-of-band communication for power control data exchange. This segmentation allows rapid power control signaling through the dedicated out-of-band channel while maintaining communication reliability, as the control channel operates independently from the power transfer process and can implement robust error handling without affecting charging speed.
Data Source
AI summary
A method, performed by a wireless power transmitter, for transmitting wireless power in a wireless power transmission system, comprises: receiving, from at least one wireless power transmitter, a configuration packet notifying the availability of out of band (OB) in a configuration phase; transmitting, to the at least one wireless power receiver, a capability packet notifying the availability of the OB in a negotiation phase; and establishing a Bluetooth low energy (BLE) connection with the at least one wireless power receiver on the basis of the configuration packet and the capability packet, wherein the BLE connection is a connection based on a BLE isochronous (ISO) channel, and through the BLE connection, the at least one wireless power transmitter exchanges at least one piece of power control data with the at least one wireless power receiver in at least one sub-event included in an interval of the BLE ISO channel.