Wireless Charging Shield Sheet with Localized Magnetic Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheets for shielding electromagnetic waves in wireless charging systems do not effectively improve magnetic field shielding efficiency, as the distribution of magnetic materials is random and does not align with the shape of the coils, leading to inefficiencies in blocking magnetic fields from reaching unintended areas.
Innovation Solution
A sheet with a base part embedding magnetic materials at varying densities corresponding to the shape and location of the coils, with higher densities in regions aligned with the coils and their inner sides, and adjusted through a magnetic field during manufacturing to optimize magnetic flux distribution, including both powder and flake forms of magnetic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If magnetic materials are randomly disposed in the base part, then the manufacturing process is simple, but the shielding efficiency of the magnetic field is insufficient
Solution Approach 1:
The patent applies local quality by varying the density of magnetic materials in different regions of the base part. Specifically, the density is higher in regions corresponding to the coil shape and inner side of the coil, and lower in other regions. This localized variation in material density optimizes shielding efficiency in critical areas while maintaining manufacturing feasibility.
2Ease of manufacture
If magnetic materials are uniformly distributed throughout the base part, then the manufacturing process is straightforward, but the magnetic field shielding is not optimized for specific coil regions
Solution Approach 1:
The patent implements local quality by creating non-uniform distribution of magnetic materials. The density is specifically increased in regions corresponding to the coil shape and the inner side of the coil, where shielding is most critical. This targeted approach reduces magnetic field leakage in problematic areas while avoiding unnecessary material in regions where shielding is less critical.
Solution Approach 2:
The patent introduces spatial variation in the third dimension (density) to optimize shielding. By controlling the density of magnetic materials at different locations within the base part, the invention creates a three-dimensional optimization of shielding properties that corresponds to the spatial distribution of electromagnetic fields around the coil.
3Reliability
If the density of magnetic material is increased throughout the entire base part, then shielding efficiency improves, but material cost and weight increase
Solution Approach 1:
The patent applies local quality by concentrating magnetic materials only in regions where they are most needed - specifically, in the regions corresponding to the coil shape and the inner side of the coil. By varying the density locally rather than uniformly increasing it throughout the entire base part, the invention achieves effective shielding while minimizing the total quantity of magnetic material required.
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 enhances the shielding efficiency of the magnetic field by aligning the magnetic material distribution with the coil shapes, effectively blocking magnetic fields from reaching areas other than the intended reception coil, thereby improving the wireless charging process.
Implementation Method 1
a sheet to shield electromagnetic waves for wireless charging includes: a base part; and a magnetic material embedded in the base part
Implementation Method 2
efficiently transmitting electromagnetic waves generated in a transmission portion Tx to a reception portion Rx
Implementation Method 3
adjusting a density of the magnetic material by forming a magnetic field through a magnet installed in the mold to change a position of the magnetic material
Data Source
AI summary
A sheet to shield electromagnetic waves for wireless charging includes: a base part formed of a resin; and a magnetic material embedded in the base part, wherein a density of the magnetic material in a region of the magnetic material corresponding to a shape of a coil of a reception coil member or a transmission coil member and a region of the magnetic material corresponding to an inner side of the coil is higher than a density of the magnetic material in other regions of the magnetic material.