Multi-Coil Wireless Power Reception for Shared Charging Control
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Solution Overview
Problem
The existing wireless power transmission systems, as defined by the WPC standard, lack the ability for the power transmitter to dynamically adjust power levels and detect foreign objects in real-time, leading to inefficiencies and potential risks due to ambiguous communication protocols.
Innovation Solution
The power transmitter actively monitors the environment and objects on its interface, performs digital pings, acquires configuration information, and transmits indication information to renegotiate power contracts with the receiver, using defined bit patterns for acknowledgment, denial, and renegotiation requests, enabling dynamic power adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single coil is used for wireless power transmission, then the device complexity is reduced, but the ability to serve multiple power receivers simultaneously is limited
Solution Approach 1:
The power transmitter is divided into multiple independent coils, each capable of independently transmitting power to different power receivers. This segmentation allows the system to serve multiple receivers simultaneously while maintaining manageable complexity through modular design.
Solution Approach 2:
Each coil in the power transmitter is designed to be multi-functional, capable of serving different power receivers based on their power requirements and positions. The coils can be selectively activated to serve single or multiple receivers, providing universal functionality across different scenarios.
2Adaptability or versatility
If multiple coils are used to serve multiple power receivers, then the adaptability is improved, but the difficulty of managing information exchanges increases
Solution Approach 1:
The system dynamically selects which coils to activate and how to allocate power based on real-time detection of power receivers and their requirements. This dynamic management allows the system to adapt to different scenarios (single receiver, multiple receivers, different power levels) without requiring complex fixed infrastructure.
Solution Approach 2:
The power transmitter detects power receivers and their characteristics, then uses this feedback information to determine optimal coil selection and power allocation. This feedback mechanism simplifies information management by using actual receiver data rather than requiring complex pre-programming for all possible scenarios.
3Productivity
If power is transmitted to multiple power receivers simultaneously, then the productivity is improved, but the energy management complexity increases
Solution Approach 1:
The system changes power transmission parameters (which coils are active, power levels for each receiver) based on detected receiver characteristics and requirements. This parameter adjustment allows efficient simultaneous power transmission to multiple receivers while simplifying energy management through data-driven decisions rather than complex fixed protocols.
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 approach allows the power transmitter to efficiently and safely adjust power levels and detect foreign objects, ensuring stable and flexible power transmission without collisions with existing protocols, thereby enhancing system responsiveness and safety.
Implementation Method 1
A wireless power transmission method executed by a power transmitter comprising multi-coils
Data Source
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AI summary
A wireless power transmission method executed by a power transmitter comprising multi-coils, according to one embodiment of the present invention, comprises the steps of: detecting a second power receiver while transmitting power to a first power receiver; determining at least one primary coil adequate for power transmission; by using the determined at least one primary coil, determining whether the second power receiver supports a shared mode protocol; and if the second power receiver supports the shared mode protocol, transmitting power to the first and second power receivers according to the shared mode protocol, wherein the shared mode protocol may be a protocol for simultaneously managing information exchanges between the power transmitter and multiple power receivers.