Wireless Charger Movable Supports Coil Alignment
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Solution Overview
Problem
Wireless chargers for portable terminals, such as mobile phones, face inefficiencies due to the lack of alignment between the power-receiving and power-transmitting coils, leading to suboptimal charging times and unnecessary standby power consumption.
Innovation Solution
A wireless charger design featuring a housing with movable side and bottom supports that adjust to align the power-receiving coil of the portable terminal with the power-transmitting coil, and a power transfer unit with gears to coordinate movement, along with a switch mechanism to prevent standby power consumption by disconnecting the power source when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery is simply placed on the terminal body without alignment structure, then the device complexity is reduced, but the charging efficiency deteriorates due to misalignment between coils
Solution Approach 1:
The patent applies dynamics by making the side supports and bottom support movable rather than fixed. The side supports can move laterally and the bottom support can move lengthwise, allowing the battery to be automatically aligned with the transmitting coil during insertion. This dynamic adjustment mechanism resolves the contradiction by adding controlled movement to achieve alignment without requiring complex pre-positioning structures.
Solution Approach 2:
The alignment mechanism utilizes the insertion action itself to drive the alignment process. As the battery is inserted into the housing, the side supports and bottom support automatically move to position the receiving coil over the transmitting coil. The system serves itself by converting the natural insertion motion into alignment action, eliminating the need for separate alignment mechanisms.
2Difficulty of detecting and measuring
If the charger remains in standby mode to sense terminal approach, then the detection capability is improved, but the energy consumption increases due to continuous power supply
Solution Approach 1:
The patent implements periodic action by switching the power supply on and off based on terminal detection. The charger operates in cycles: powered on to detect terminal approach, then powered off during standby, and powered on again when a terminal is detected. This periodic operation allows the charger to maintain detection capability while significantly reducing continuous energy consumption during idle periods.
Solution Approach 2:
The patent extracts the power consumption issue by separating the detection function from continuous power supply. The charger can detect terminal approach using minimal power (or residual capacitance) and only activates the full power supply when actually needed for charging. This extraction of the power-intensive operation resolves the contradiction between detection and energy consumption.
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 design enhances charging efficiency by ensuring optimal alignment of the coils regardless of terminal size and reduces standby power consumption by only activating the charger when a terminal is present for charging.
Implementation Method 1
a power-transmitting coil is wound around a terminal body... a power-receiving coil that can interface with the charger's power-transmitting coil
Data Source
AI summary
A wireless charger optimized for charging efficiency of portable terminals (e.g., mobile phones) of different sizes has a housing including within it laterally spaced side supports and a bottom support for cradling an inserted portable terminal. The side supports and the bottom support are interlocked for coordinated movement such that the bottom support is moved by a predetermined amount according to movements of the side supports. This arrangement optimizes relative placement of the charger's transmitting coil and the portable terminal's receiving coil.