Wireless Power Allocation via Out-of-Band Receiver Negotiation
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Solution Overview
Problem
In wireless power transmission systems, the existing in-band communication methods are inadequate for high-speed and large-capacity information exchange, leading to complexity in negotiation protocols, especially in one-to-many charging scenarios, and are unable to negotiate power allocation when a wireless power receiver is in a power-off state due to disabled short-range communication modules.
Innovation Solution
The implementation of a wireless power receiver and transmitter with both in-band and out-of-band communication modules, allowing for power allocation negotiation using out-of-band communication even when the receiver is in a power-off state, and enabling the use of out-of-band identifiers and negotiation priority information to manage power distribution among multiple receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If in-band communication is used for power transmission systems, then communication between transmitter and receiver is established, but the communication speed and information capacity are insufficient for high-speed and large-capacity data exchange
Solution Approach 1:
The patent divides the communication function into two separate channels: in-band communication for basic power transmission control and out-of-band communication for high-speed data exchange. This segmentation allows each communication channel to be optimized for its specific purpose, resolving the contradiction between communication speed and information capacity.
Solution Approach 2:
The patent introduces out-of-band communication as an intermediary channel that handles high-speed data exchange, while in-band communication continues to handle power transmission control. This intermediary approach allows the system to achieve both high communication speed and sufficient information capacity without compromising the original power transmission function.
2Ease of operation
If in-band communication is used for negotiation, then power transmission control is maintained, but the negotiation protocol becomes complex in one-to-many charging scenarios
Solution Approach 1:
The patent segments the negotiation function from the power transmission control function. Out-of-band communication handles the complex negotiation protocols for multiple receivers, while in-band communication maintains simple power transmission control. This reduces the complexity burden on the power transmission system.
Solution Approach 2:
The patent introduces out-of-band communication as an intermediary for handling complex negotiation protocols in one-to-many charging scenarios. This intermediary channel manages the complexity of multi-device negotiation, leaving the in-band communication channel simple and focused on power transmission control.
3Use of energy by moving object
If short-range communication modules are disabled in power-off state to save energy, then energy consumption is reduced, but power allocation negotiation cannot be performed when receiver is off
Solution Approach 1:
The patent enables out-of-band communication modules to operate in advance (before power transmission starts) even when the receiver is in power-off state. This preliminary action allows the system to perform power allocation negotiation before actual power delivery, ensuring both energy efficiency and negotiation capability.
Solution Approach 2:
The patent uses out-of-band communication as an intermediary channel that can operate independently of the power transmission state. This intermediary communication path allows negotiation to occur even when the receiver's main communication modules are disabled, resolving the contradiction between energy saving and negotiation capability.
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 solution simplifies the negotiation protocol, enables effective power allocation in one-to-many charging scenarios, and allows power allocation negotiation even when receivers are in a power-off state, enhancing the operational efficiency and stability of wireless power transmission systems.
Implementation Method 1
The wireless power transmission technology allows the battery of a wireless terminal such as a smartphone or tablet to be charged simply by placing the wireless terminal on a wireless charging pad
Implementation Method 2
The magnetic induction method transmits energy by using currents induced in a receiver-side coil due to the magnetic field generated at a transmitter-side coil battery cell according to electromagnetic coupling between the transmitter-side coil and the receiver-side coil
Implementation Method 3
the magnetic resonance method is different from the magnetic induction method in that resonance is generated when a specific resonant frequency is applied to the transmitter-side and receiver-side coils; and energy is transferred as a magnetic field is concentrated due to the generated resonance at both ends of the transmitter and receiver-sides
Data Source
AI summary
A wireless power receiver may comprise: a power pick-up circuit configured to receive power wirelessly from a wireless power transmitter including a plurality of primary coils by magnetic coupling to the wireless power transmitter at an operating frequency and to convert an alternating current signal induced by the wireless power into a direct current signal; a communication/control circuit receiving the direct current signal supplied from the power pick-up circuit and including an in-band communication module which communicates with the wireless power transmitter by using the operating frequency, and an out-band communication module which communicates with the wireless power transmitter by using any frequency except for the operating frequency; and a load configured to receive the direct current signal supplied from the power pick-up circuit, wherein the communication/control circuit transmits a message informing of the start of power allocation negotiation, to other wireless power receivers by using the out-band communication module.