Wireless Charging Board With Central Magnetic Pattern
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Solution Overview
Problem
The existing wireless charging technologies face challenges in achieving efficient charging while minimizing the thickness of the shielding layer, which is crucial for embedding wireless charging devices in portable mobile terminal devices due to increased material costs and thickness requirements.
Innovation Solution
A wireless charging board configuration that includes a magnetic pattern disposed in the central part of the coil pattern, with a thickness equal to or less than the coil pattern, and a shielding layer with a relative permeability of 10 to 1000, formed from Fe-based materials, to enhance charging efficiency and reduce the overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the shielding material is increased to generate a predetermined voltage difference, then the voltage difference detection reliability is improved, but the device thickness increases and material costs increase
Solution Approach 1:
The patent applies local quality by placing a magnetic pattern specifically in the central region of the coil pattern rather than uniformly distributing magnetic material throughout. This localized approach concentrates magnetic flux where it is most needed for voltage difference generation, achieving reliable detection with minimal shielding material thickness.
Solution Approach 2:
The patent uses composite materials by combining the magnetic pattern (with high relative permeability of 10-100000) with the shielding layer (with lower relative permeability of 10-1000). This composite structure leverages the high permeability of the magnetic pattern to concentrate magnetic flux and generate sufficient voltage difference while keeping the shielding layer thin.
2Reliability
If the thickness of the shielding material is increased to generate a predetermined voltage difference, then the voltage difference detection reliability is improved, but the device complexity increases
Solution Approach 1:
By concentrating the magnetic pattern only in the central region rather than using uniform shielding throughout, the patent reduces the overall device complexity and makes embedding easier while maintaining detection reliability in the critical area.
3Productivity
If a magnetic pattern is added to improve charging efficiency, then the voltage difference is increased, but the device complexity increases
Solution Approach 1:
The magnetic pattern is strategically placed only in the central region of the coil pattern where magnetic flux concentration provides the greatest benefit for charging efficiency. This localized approach maximizes productivity improvement while minimizing the increase in device 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 improves wireless charging efficiency by increasing the voltage difference detected by the hall sensor, allowing for thinner shielding layers and easier integration into portable devices without significant increases in material costs.
Implementation Method 1
a magnetic pattern disposed in a space of a central part of the coil pattern
Implementation Method 2
a battery is charged using magnetic coupling without electrical contact at a short distance
Implementation Method 3
a shielding layer; a coil pattern disposed on one surface of the shielding layer
Implementation Method 4
a voltage difference of a predetermined voltage or more has to be generated when the receiver is not located in an area which the transmitter can reach
Implementation Method 5
a magnetic field is formed by alternating current (AC) power energy generated in a primary coil, current flows through a coil of an antenna, and a voltage is generated due to an inductance of the antenna
Implementation Method 6
a hall sensor is mounted on a transmitter that transmits power in transmission standards for power matters alliance (PMA), and the hall sensor detects the instant that a receiver is located in an area which the transmitter can reach
Data Source
AI summary
Provided are a wireless charging board and a wireless charging device. The wireless charging board includes: a shielding layer; a coil pattern disposed on one surface of the shielding layer; and a magnetic pattern disposed in a space of a central part of the coil pattern.