Multi-Coil Wireless Charger with Segmented Cores
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Solution Overview
Problem
Existing wireless charging technologies face limitations in providing a wide charging area and simultaneous charging of multiple devices due to magnetic field interference from overlapped cores, restricting the chargeable range and user convenience.
Innovation Solution
A wireless charging device with multiple coils overlapped on separated cores, featuring a multi-layer structure of plate cores and coils that are horizontally and vertically overlapped to create a wide charging area, preventing magnetic field interference and enabling efficient electromagnetic induction for multiple device charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple coils are overlapped on a single core to extend charging area, then the charging area is extended, but magnetic field interference occurs between coils
Solution Approach 1:
The patent divides the single core into multiple separate cores (first core and second core). Each coil is assigned to a separate core, eliminating magnetic field interference between coils while maintaining overlapping arrangement for extended charging area. The segmentation of the core structure resolves the contradiction by isolating magnetic fields.
Solution Approach 2:
The patent introduces separate cores as intermediary structures between coils. Each coil is coupled to its own dedicated core, acting as an intermediary that guides and isolates magnetic flux. This prevents direct magnetic field interference between overlapping coils while still enabling wide-area charging through the overlapping coil arrangement.
2Device complexity
If a single core with overlapped coils is used, then device complexity is reduced, but magnetic field interference limits charging effectiveness
Solution Approach 1:
The patent segments the core structure into multiple separate cores, each dedicated to a specific coil. This segmentation improves power transmission reliability by eliminating magnetic field interference between coils, while the overall device complexity remains manageable through the systematic arrangement of separate core-coil pairs.
3Area of stationary object
If coils are placed close together to maximize charging area, then charging area is maximized, but magnetic field interference increases
Solution Approach 1:
By assigning each coil to a separate core, the patent enables coils to be placed close together for maximum charging area coverage without magnetic field interference. The separate cores act as magnetic field isolators, allowing dense coil arrangement for area maximization while preventing harmful interference.
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 provides a wide charging area allowing for convenient charging of multiple devices without precise alignment, enhancing user convenience and charging efficiency by preventing magnetic field interference and ensuring reliable power transmission across a broader range.
Implementation Method 1
power may be transferred from the non-contact power transmitting device to the non-contact power receiving device through an electromagnetic induction phenomenon between the two devices
Implementation Method 2
two plate cores spaced apart from each other and a first coil layer to a fourth coil layer which are placed above the two plate cores, placed on different layers from one another and are overlapped with one another
Data Source
Figure 1
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AI summary
According to an embodiment of the present disclosure, the wireless charging device includes a first plate core (10a) and a second plate core (10b) spaced apart from one another, a first layer coil including a 1-1 coil (c1-1) disposed on the first plate core (10a) and a 1-2 coil (c1-2) disposed on the second plate core (10b); a second layer coil disposed above the first layer coil, the second layer coil including a 2-1 coil (c2-1) disposed on the first layer coil and partially overlapped with the 1-1 coil, and a 2-2 coil (c2-2) partially overlapped with the 1-1 coil and the 1-2 coil, and a 2-3 coil (c2-3) partially overlapped with the 1-2 coil; a third layer coil disposed above the second layer coil, the third layer coil including a 3-1 coil (c3-1) partially overlapped with the 2-1 coil and the 2-2 coil, and a 3-2 coil (c3-2) partially overlapped with the 2-2 coil and the 2-3 coil; and a fourth layer coil disposed above the third layer coil and including a 4-1 coil (c4-1) partially overlapped with the 3-1 coil and a 4-2 coil (c4-2) partially overlapped with the 3-1 coil and the 3-2 coil.