Wireless Charging Pad with Magnetic Fixing Unit
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Solution Overview
Problem
Portable electronic devices face increased battery consumption due to enhanced functionalities, and existing wireless charging methods require physical connections or large distance ranges, which can be inconvenient and pose safety concerns.
Innovation Solution
A wireless charging system that uses a transmitting unit to generate magnetic energy and a fixing unit to create an attractive force, allowing a portable electronic device to be attached and charged wirelessly, with a neodymium-based permanent magnet or electromagnetic magnet used for the fixing units to ensure a secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If magnetic induction method is used for wireless charging, then charging distance is reduced to 0.5-1 cm, but additional fixing devices are required to prevent device from coming off during movement
Solution Approach 1:
The patent combines the fixing function with the wireless charging pad by integrating a magnet into the charging pad structure. This merging eliminates the need for separate fixing devices while maintaining the short charging distance advantage of magnetic induction method.
Solution Approach 2:
The magnet in the charging pad provides automatic fixing functionality that works passively once the device is placed on the pad. The magnetic attraction force automatically holds the device in position without requiring additional active fixing mechanisms or user intervention.
2Length of stationary object
If magnetic resonance method is used for wireless charging, then charging distance is extended to 2-3 m, but impact assessment for human body is required due to electromagnetic waves
Solution Approach 1:
The patent changes the operating parameters by using magnetic induction at very short distance (0.5-1 cm) instead of magnetic resonance at longer distances (2-3 m). This parameter change reduces electromagnetic wave exposure while maintaining effective charging capability.
3Length of stationary object
If electromagnetic wave method is used for wireless charging, then charging distance is extended to several tens km, but impact assessment for human body is required
Solution Approach 1:
The patent fundamentally changes the charging method from electromagnetic wave transmission to magnetic induction at close range. This parameter change reduces charging distance to 0.5-1 cm and eliminates the need for impact assessment, achieving a balance between convenience and safety.
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
Enables convenient and secure wireless charging of portable electronic devices, even when in motion, without the need for physical cables and with reduced safety risks, while maintaining efficient power transfer.
Implementation Method 1
a transmitting unit configured to receive a high-frequency AC current and generate magnetic energy
Implementation Method 2
a first fixing unit disposed on a rear surface of the transmitting unit and configured to generate a designated magnitude or more of attractive force
Data Source
AI summary
A wireless charging device may include: a transmitting unit configured to receive a high-frequency AC current and generate magnetic energy; and a first fixing unit disposed on a rear surface of the transmitting unit and configured to generate a designated magnitude or more of attractive force.