Wireless Charging Substrate With Uneven Heat Dissipation Layer
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Solution Overview
Problem
Existing wireless charging systems face inefficiencies in heat dissipation and electromagnetic interference between the soft magnetic layer and the battery, which affects charging efficiency.
Innovation Solution
A wireless charging board design featuring a heat dissipation layer with an uneven pattern to enhance adhesive force and heat dissipation, and using the battery housing as the heat dissipation layer to suppress electromagnetic interference and maintain high permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a flat heat dissipation layer is used, then the structure is simple, but the contact surface area is small and adhesive force is weak
Solution Approach 1:
The heat dissipation layer is designed with an uneven pattern including protrusions and recesses instead of a flat surface. This curvature/unevenness increases the contact surface area between the heat dissipation layer and soft magnetic layer, thereby improving adhesive force and heat dissipation efficiency without adding complex separate components
2Productivity
If the soft magnetic layer is placed close to the battery, then the structure is compact, but electromagnetic interference occurs
Solution Approach 1:
The heat dissipation layer with uneven pattern serves as an intermediary barrier between the soft magnetic layer and the battery. This intermediate structure suppresses electromagnetic interference while maintaining the compact design and high charging efficiency through improved magnetic coupling
3Temperature
If a simple flat structure is used, then manufacturing is easy, but heat dissipation efficiency is low
Solution Approach 1:
The uneven pattern with protrusions and recesses is formed directly on the heat dissipation layer, increasing the surface area for heat dissipation. This structural modification can be integrated into the existing manufacturing process without requiring additional complex steps or 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
The design improves heat dissipation and reduces electromagnetic interference, leading to increased charging efficiency and adhesive force between the heat dissipation and soft magnetic layers.
Implementation Method 1
A magnetic field is formed by alternating current (AC) power energy generated in a primary coil, current is induced by the AC power energy flowing through the coil of the antenna
Implementation Method 2
heat generated in a coil pattern and the soft magnetic layer can be more efficiently dissipated to the outside through the heat dissipation layer
Implementation Method 3
high permeability is maintained so that charging efficiency from a transmitter to a receiver can be further improved
Data Source
AI summary
Provided is a wireless charging board including: a coil pattern; a soft magnetic layer having one side on which the coil pattern is disposed; and a heat dissipation layer disposed on the other side of the soft magnetic layer and including a first uneven pattern portion.