Wireless Power Receiver Coordination via Out-of-Band Negotiation
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in efficiently managing power allocation and communication between multiple wireless power receivers due to limitations in in-band communication speed and complexity, especially when out-of-band communication modules are disabled or power is off, leading to potential packet collisions and incomplete power negotiations.
Innovation Solution
Implementing a wireless power receiver and transmitter with both in-band and out-of-band communication modules to facilitate power allocation negotiations through out-of-band communication, enabling power allocation even when receivers are in a power-off state, and supporting heterogeneous communication protocols to manage multiple receivers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If in-band communication is used for power allocation negotiation, then communication can be performed using existing wireless power transmission infrastructure, but communication speed is insufficient and packet collisions occur leading to incomplete power negotiations
Solution Approach 1:
The patent introduces out-of-band communication as an intermediary channel to facilitate power allocation negotiations between wireless power receivers. This separate communication path acts as a mediator that bypasses the limitations of in-band communication, enabling reliable data exchange without packet collisions and ensuring complete power negotiations even when receivers are in power-off state.
2Use of energy by moving object
If out-of-band communication modules are disabled or power is off to save energy, then energy consumption is reduced, but power allocation negotiation cannot be performed
Solution Approach 1:
The patent enables out-of-band communication modules to operate in advance before full power is activated in wireless power receivers. This preliminary action allows the communication module to perform power allocation negotiations while consuming minimal energy, and the negotiation results are then used to guide the subsequent full power transmission, avoiding the need to keep communication modules continuously active.
Solution Approach 2:
The out-of-band communication serves as an intermediary that enables power allocation functionality even when the main power systems are off or in low-power state. This separate communication channel allows the system to perform necessary negotiations without requiring full power activation, thus maintaining ease of operation while minimizing energy consumption.
3Productivity
If multiple wireless power receivers are served simultaneously using in-band communication, then one-to-many charging is enabled, but communication complexity increases and packet collisions occur
Solution Approach 1:
The patent segments the communication function into separate in-band and out-of-band channels. The out-of-band communication handles power allocation negotiations for multiple receivers, while in-band communication maintains its original power transmission function. This segmentation reduces communication protocol complexity by dedicating specific channels to specific tasks, and prevents packet collisions by avoiding simultaneous use of the same communication resource for multiple receivers.
Solution Approach 2:
The out-of-band communication acts as an intermediary layer that manages multiple wireless power receivers simultaneously. This separate communication path reduces the burden on in-band communication, allowing the system to serve multiple receivers without increasing overall communication complexity or experiencing packet collisions.
4Ease of manufacture
If in-band communication is used for information exchange, then no additional communication hardware is needed, but communication capacity is insufficient for high-speed and large-capacity information exchange
Solution Approach 1:
The patent implements a multi-functionality approach where the wireless power transmission system incorporates both in-band and out-of-band communication capabilities. The in-band communication handles basic power transmission coordination, while the out-of-band communication handles high-speed and large-capacity information exchange. This universal design allows the system to maintain simplicity for basic operations while providing enhanced information exchange capacity when needed.
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
Enhances power allocation efficiency and reduces complexity in one-to-many charging scenarios by enabling seamless communication and power management among multiple receivers, even when out-of-band modules are disabled or power is off, thus stabilizing power transmission and reducing the risk of receiver damage.
Implementation Method 1
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 2
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.