Adjustable Induction Coil for Wireless Charging Misalignment
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Solution Overview
Problem
Existing information handling systems face inefficiencies in wireless charging due to misalignment and varying positions of portable devices, leading to reduced charging speed and efficiency.
Innovation Solution
A charging device with an adjustable induction coil that dynamically changes its active length based on sensor feedback, including proximity, temperature, and battery information, to optimize coupling with the portable device's induction coil, thereby enhancing charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed-length induction coil is used for wireless charging, then the device structure is simple, but charging efficiency decreases when device misalignment occurs
Solution Approach 1:
The patent applies the dynamics principle by making the induction coil length adjustable rather than fixed. The coil structure includes multiple segments that can be dynamically reconfigured to change the active length, allowing the system to adapt to different device positions and maintain optimal charging efficiency. The controller switches between different coil configurations based on detected device placement, transforming a static structure into a dynamic one that responds to operational conditions.
Solution Approach 2:
The patent implements parameter changes by varying the active length of the induction coil as a key parameter. The system changes the physical dimension (length) of the coil to optimize magnetic coupling with the portable device. This parameter adjustment allows the charging field to be tailored to different device sizes and positions, improving energy transfer efficiency without requiring complex mechanical alignment mechanisms.
2Adaptability or versatility
If the induction coil active length is increased to cover larger device positions, then positioning adaptability improves, but energy loss increases due to larger coil area
Solution Approach 1:
The patent applies segmentation by dividing the induction coil into multiple discrete segments or sections along its length. Each segment can be independently activated or deactivated based on the detected device position. This segmentation allows the system to use only the necessary portion of the coil for charging, maintaining position adaptability while minimizing energy loss by keeping inactive segments dormant rather than consuming power unnecessarily.
Solution Approach 2:
The patent implements partial action by activating only the necessary portion of the induction coil required for effective charging. Rather than energizing the entire coil length, the system activates just enough segments to cover the device placement area, reducing overall energy consumption while maintaining sufficient charging capability. This approach avoids the excessive energy loss that would occur if the full coil area were always active.
3Productivity
If electronic switching of coil segments is added to adjust active length, then charging efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements feedback by using sensors to detect the position and presence of the portable device on the charging surface. This detection information feeds back to the controller, which then automatically selects and activates the appropriate coil segments for optimal charging. The feedback mechanism enables automatic adaptation without requiring complex manual intervention or sophisticated control algorithms, balancing improved charging performance with manageable system 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
The solution increases charging speed and efficiency by adjusting the coil's active length to compensate for device misalignment and position variations, resulting in improved power transfer and battery charging performance.
Implementation Method 1
transmit power wirelessly to a portable device having a second induction coil by coupling the first induction coil and the second induction coil
Data Source
AI summary
Systems and methods for dynamic coil area and power adjustment based on device position and sensor fusion feedback from touch, optical, Bluetooth, and specific absorption rate sensor devices may include a charging device that may include a first induction coil having an active length and a processor. The charging device may transmit power wirelessly to a portable device having a second induction coil by coupling the first induction coil and the second induction coil. The charging device may determine an adjusted active length of the first induction coil that may be based on a first charging efficiency of the first induction coil. The processor may electronically switch the active length of the first induction coil to the determined adjusted active length. The processor may transmit the power wirelessly to the portable device to charge a first battery of the portable device.