Ring-Shaped Wireless Charging Coil Layout for Curved Device Efficiency
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Solution Overview
Problem
Existing wireless charging technologies face inefficiencies due to the increased distance between transmission and reception coils, particularly when charging devices with curved or irregular shapes, leading to reduced power transmission efficiency and potential electromagnetic interference.
Innovation Solution
The implementation of a wireless charging device with ring-shaped transmission and reception coils and magnetic bodies, where the coils face each other to minimize distance and maximize electromagnetic field generation, allowing for efficient power transfer and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the coil of the transmission part and the coil of the reception part are wound on a plane with increased radii to enlarge facing surfaces, then wireless power transmission efficiency is improved, but the device occupies more space and the distance from the outskirt increases
Solution Approach 1:
The patent applies curvature by forming the coil windings in a three-dimensional arched structure rather than a flat plane. The coil winding lines extend along an arch shape with a predetermined radius, creating a curved surface that increases the facing surface area between transmission and reception coils while maintaining a compact footprint. This curved configuration allows the coils to face each other more effectively without requiring a larger planar area, thus improving power transmission efficiency without proportionally increasing device volume.
2Ease of manufacture
If a predetermined distance is provided between the horizontal surface and the curved surface for coil installation, then the coil can be properly mounted, but the facing distance between transmission and reception coils increases reducing power transmission efficiency
Solution Approach 1:
The patent resolves this contradiction by using a curved arch structure for the coil windings. The coil winding lines are formed along an arch shape that naturally provides the necessary mounting distance from the horizontal surface while keeping the vertical distance between transmission and reception coils minimal. The curved configuration allows coils to be installed on the arch structure without requiring excessive spacing, as the curvature itself provides the structural framework that maintains both manufacturing feasibility and optimal facing distance for power transmission.
Solution Approach 2:
The patent transitions from a two-dimensional flat coil arrangement to a three-dimensional arched structure. By utilizing the vertical dimension and creating an arch shape with a predetermined radius, the patent achieves both adequate mounting distance for coil installation and minimal facing distance between transmission and reception coils. This dimensional change allows the coil to be positioned at an optimal distance from the horizontal surface while maintaining close proximity to the opposing coil for efficient power transmission.
3Loss of energy
If the coil facing surface area is increased to improve power transmission, then more space is required for the charging pad and mobile device, but compact device design is compromised
Solution Approach 1:
The patent employs a curved arch structure for the coil windings that increases the effective facing surface area without requiring a larger planar footprint. The arch shape allows the coil to wrap around a curved path, creating a three-dimensional winding pattern that increases the active area for electromagnetic coupling while maintaining a compact overall device structure. This curved configuration enables improved power transmission efficiency without proportionally increasing the device's external dimensions or structural 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
This configuration enhances wireless power transmission efficiency, stabilizes electric power induction, and reduces electromagnetic interference, while also optimizing internal space utilization for component arrangement.
Implementation Method 1
The transmission magnetic body generates at least one electric field such that electric power is induced in the at least one reception coil provided in the wireless power receiving device when a current is applied to the at least one transmission coil
Data Source
AI summary
An example wireless charging device includes a wireless charging device body and a wireless power transmitting device disposed on the wireless charging device body. The wireless power transmitting device includes at least one transmitting coil and a transmitting magnetic body configured to surround the at least one transmitting coil and to face a receiving magnetic body provided on a wireless power receiving device of an external electronic device. The inner peripheral surface of the wireless power transmitting device faces the inner surface of the wireless charging device body. The transmitting magnetic body is formed in a ring structure, at least a part of which is open. One surface of the open ring structure is disposed on at least a part of the inner surface of the wireless charging device body. One surface of the ring structure of the transmitting magnetic body faces the receiving magnetic body.