Wireless Power Control via Out-of-Band Links for Multi-Device Charging
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in managing power distribution efficiently among multiple devices within an effective charging range, leading to potential overvoltage issues and instability in power reception due to compatibility problems between different power classes and profiles.
Innovation Solution
Implementing out-of-band communication to establish dynamic power management among multiple wireless power receivers, allowing for rapid and safe message exchange to determine charging status and allocate power effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power transmission is provided to multiple devices simultaneously, then power distribution capability is improved, but power management complexity and stability deteriorate
Solution Approach 1:
The patent segments power management into separate communication channels: in-band communication handles power control messages between transmitter and receiver, while out-of-band communication establishes device profiles and compatibility information beforehand. This segmentation allows simultaneous management of multiple devices without channel interference, resolving the contradiction between improved power distribution capability and worsened management complexity
Solution Approach 2:
The patent implements preliminary action by establishing out-of-band communication channels before power transmission begins. Device profiles, compatibility information, and communication parameters are predetermined and stored in advance. When multiple devices are served simultaneously, the transmitter can quickly retrieve pre-established communication parameters without real-time negotiation, reducing management complexity while maintaining high productivity
2Productivity
If multiple devices are served simultaneously, then charging efficiency is improved, but power reception stability deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where receiving devices send power reception status and compatibility information back to the transmitter through in-band communication. The transmitter uses this feedback to dynamically adjust power allocation for each device, ensuring stable power reception even when serving multiple devices simultaneously. The feedback loop maintains reliability while allowing high charging efficiency through parallel device management
Solution Approach 2:
Device compatibility profiles and power reception characteristics are determined in advance through out-of-band communication before actual power transmission. This preliminary characterization allows the transmitter to pre-calculate optimal power allocation strategies for multiple devices, ensuring stable power reception from the outset while maintaining high charging efficiency through coordinated simultaneous charging
3Productivity
If dynamic power management is implemented, then power allocation efficiency is improved, but communication overhead increases
Solution Approach 1:
The patent segments communication into two functional parts: out-of-band communication for static device profiling and capability exchange, and in-band communication for dynamic power control. By separating static information (device profiles, compatibility data) from dynamic control messages, the system achieves efficient real-time power allocation while minimizing communication overhead through efficient use of in-band channels for only essential power management updates
4Measurement precision
If out-of-band communication is established, then device compatibility determination is improved, but system complexity increases
Solution Approach 1:
The patent implements a universal out-of-band communication framework that handles multiple functions: device discovery, profile exchange, compatibility verification, and communication parameter establishment. This single universal communication mechanism serves all devices regardless of type or power requirements, improving compatibility determination accuracy while avoiding the need for device-specific complex communication protocols, thus limiting the increase in overall system complexity
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
Enables safe and efficient power distribution to multiple devices by ensuring stable power transfer and reducing the risk of overvoltage, enhancing user experience and infrastructure compatibility.
Implementation Method 1
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 2
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 3
The magnetic resonance method is similar to the magnetic induction method in that is uses a magnetic field. However, the magnetic resonance method is different from the magnetic induction method in that energy is transmitted due to a concentration of magnetic fields on both a transmitting end and a receiving end, which is caused by the generated resonance.
Data Source
AI summary
Provided are: a method for establishing out-band communication performed by a wireless power transmitter in a wireless power transmission system; and a device for using same. The method comprises the steps of: transmitting a plurality of pieces of capability information to a plurality of wireless power receivers respectively through in-band communication, wherein each of the plurality of pieces of capability information includes information about whether the wireless power transmitter supports the out-band communication; establishing the out-band communication with the plurality of wireless power transmitters on the basis of the transmission of the plurality of pieces of capability information; and exchanging power control information pertaining to the plurality of wireless power receivers with the plurality of wireless power receivers through the out-band communication.