Magnetic Sheet Adhesive Layers for Wireless Power Efficiency
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Solution Overview
Problem
Existing magnetic sheets for wireless power charging systems face challenges in achieving high magnetic saturation and permeability while minimizing core and magnetic force losses, which limits the efficiency of power charging.
Innovation Solution
The magnetic sheet incorporates adhesive layers with dispersed core loss decreasing members made of amorphous, ferrite, or synthetic materials, and magnetic saturation reinforcing members formed from hetero-amorphous or nanocrystalline-amorphous materials, arranged in a stacked structure to enhance magnetic flux focusing and reduce energy losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic sheet uses conventional materials to improve magnetic saturation and permeability, then power charging efficiency increases, but core loss and magnetic force loss increase
Solution Approach 1:
The magnetic sheet uses a composite structure combining ferrite particles and amorphous alloy particles dispersed in an adhesive layer. The ferrite particles (with high magnetic saturation) and amorphous alloy particles (with low core loss) work synergistically to achieve both high power charging efficiency and low energy loss, resolving the technical contradiction between improving magnetic performance and reducing energy loss.
2Productivity
If the magnetic sheet uses high magnetic saturation materials, then wireless power transmission efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent combines ferrite particles and amorphous alloy particles into a single integrated magnetic sheet structure with adhesive layers. This merged design achieves high wireless power transmission efficiency through the complementary magnetic properties of the composite materials while simplifying manufacturing by using a unified sheet structure rather than separate components.
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 increases magnetic saturation and permeability, decreases core and magnetic force losses, and optimizes power charging efficiency by improving the Q factor and permeability of the magnetic sheet, leading to enhanced wireless power transmission.
Implementation Method 1
core loss decreasing members formed of at least one of an amorphous material, a ferrite material, and a synthetic material of amorphous and ferrite materials are dispersed
Implementation Method 2
magnetic saturation (Ms) reinforcing members, formed of at least one of a hetero-amorphous material, a nanocrystalline-amorphous material, and a synthetic material of hetero-amorphous and nanocrystalline-amorphous materials, are dispersed
Implementation Method 3
charging a battery using electromagnetic induction, charges a battery by converting into energy the power generated by inductive coupling between a primary coil (e.g., a transmitter coil provided in a charger such as a wireless power transmission device) and a secondary coil
Data Source
AI summary
A magnetic sheet for a wireless power charging system includes an electrode layer, first and second magnetic layers disposed on the electrode layer, and first and second adhesive layers disposed on the electrode layer. The first adhesive layer is disposed between the electrode layer and the first magnetic layer, and the second adhesive layer is disposed between the first and second magnetic layers. In one example, the first and second adhesive layers each include a plurality of core loss decreasing members, formed of at least one of an amorphous material, a ferrite material, and a synthetic material of amorphous and ferrite materials, dispersed therein. In another example, the first and second adhesive layers each include a plurality of magnetic saturation (Ms) reinforcing members, formed of at least one of a hetero-amorphous material, a nanocrystalline-amorphous material, and a synthetic material of hetero-amorphous and nanocrystalline-amorphous materials, dispersed therein.