Wireless Charging Magnet Layout for Stronger Attachment and Power Transfer
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Solution Overview
Problem
Current wireless charging technologies face limitations in achieving high magnetic field strength and efficient power transmission due to the lack of effective magnet configurations, which affects the attaching force and power transfer efficiency between wireless power transmission and reception devices.
Innovation Solution
The electronic device incorporates a cylindrical first magnet and a toroidal second magnet, with the second magnet overlapping the transmission coil unit, forming a magnetic field perpendicular to the first magnet's field, and disposed in a Halbach shape to enhance the magnetic force and attachment between devices, thereby increasing the attaching force and power transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnet configuration is used in wireless charging, then the device structure is simple, but the magnetic field strength and power transmission efficiency are insufficient
Solution Approach 1:
The patent combines multiple magnets with different configurations (first magnet, second magnet, and third magnet) to form a composite magnetic field system. This merging of multiple magnetic sources creates a synergistic effect that enhances overall magnetic field strength and power transmission efficiency beyond what a single magnet could achieve.
Solution Approach 2:
The patent employs a composite magnet structure where magnets with different orientations and positions are integrated together. This composite configuration allows the system to leverage the advantages of each individual magnet arrangement, creating a more effective overall magnetic field for wireless power transmission.
2Power
If magnets are positioned to maximize magnetic field strength, then power transmission efficiency improves, but the impact on transmission coil operation increases
Solution Approach 1:
The patent positions magnets at specific locations (first magnet at center, second magnet at corner, third magnet overlapping the coil) with specific orientations to create localized magnetic field enhancements. This selective positioning ensures that magnetic field strength is maximized at critical points while minimizing disruptive effects on the transmission coil's overall operation.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of magnets with different orientations (perpendicular and parallel configurations). By distributing magnets in multiple dimensions and orientations, the system achieves comprehensive magnetic field coverage that enhances power transfer while reducing concentrated interference on the transmission coil.
3Reliability
If magnets are arranged to enhance attaching force between devices, then wireless charging stability improves, but the device complexity increases
Solution Approach 1:
The patent divides the magnetic attachment function into multiple discrete magnet components positioned at different locations within the device housing. This segmentation allows each magnet to contribute to the overall attaching force while enabling independent optimization of each magnet's position and orientation, thereby enhancing reliability without requiring a monolithic complex structure.
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 configuration provides a higher magnetic field strength and improved attaching force between devices, enhancing the efficiency of wireless power transmission while minimizing the impact on the transmission coil operation.
Implementation Method 1
the first magnet is configured to form a magnetic field in the first direction, and the second magnet is configured to form a magnetic field in a third direction perpendicular to the first direction
Implementation Method 2
The transmission end generates a magnetic field, and a current is induced and resonated according to variations in magnetic field in the reception end, creating energy
Implementation Method 3
Wireless charging-based power transmission methods transmit power between a first coil of the transmission end and a second coil of the reception end. The transmission end generates a magnetic field, and a current is induced and resonated according to variations in magnetic field in the reception end, creating energy
Data Source
AI summary
Provided is an electronic device including a housing including a first surface facing in a first direction, a second surface facing in a second direction opposite to the first direction, and a side surface between the first surface and the second surface; a transmission coil unit disposed adjacent to the first surface and including a coil wound at least once in a clockwise direction or a counterclockwise direction perpendicular to the first direction and the second direction and configured to wirelessly transmit power; a first magnet disposed in a center area inside the housing surrounded by the transmission coil unit; and a second magnet including a first end portion oriented toward the first magnet, a second end portion facing the side surface, and at least a portion of the second magnet is overlapping the transmission coil unit in the first direction.