Asymmetrical Wireless Charging Coils for Uniform Multi-Angle Charging
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Solution Overview
Problem
Existing wireless charging systems fail to maintain a substantially uniform charge rate when wireless accessories are positioned at different angles relative to the charging source, leading to significant performance issues and inefficiencies.
Innovation Solution
A wireless charging system with asymmetrical coil configurations, where the transmitting coil has a rectangular cross-section and the receiving coil has an asymmetrical shape with flat and rounded portions, allowing for uniform magnetic flux capture across various angles, ensuring consistent charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cylindrical solenoid coils are used for wireless charging, then the charging system is simple in structure, but the charge rate varies significantly when the accessory is positioned at different angles relative to the charging source
Solution Approach 1:
The patent applies asymmetry by configuring the transmitting coil with a rectangular cross-section and the receiving coil with an asymmetrical shape featuring flat and rounded portions. This asymmetric geometry is specifically designed to maintain uniform magnetic flux capture across multiple charging configurations, directly resolving the technical contradiction by prioritizing charging consistency over structural simplicity.
Solution Approach 2:
The patent implements local quality by creating distinct geometric features at different locations of the coils - the transmitting coil has a rectangular cross-section while the receiving coil has flat portions in some areas and rounded portions in others. These localized geometric variations are optimized for specific charging configurations, enabling the system to maintain consistent charging performance across multiple positions while managing overall complexity through targeted design.
2Adaptability or versatility
If magnets or alignment features are incorporated to lock coils into a singular alignment, then charging efficiency is maximized for a single configuration, but the system cannot support multiple charging configurations
Solution Approach 1:
The patent applies universality by designing the asymmetrical coil configuration to serve multiple charging configurations simultaneously. The rectangular transmitting coil and asymmetrical receiving coil are engineered to maintain effective magnetic coupling across at least two different charging configurations without requiring alignment features or magnets, thus achieving multi-functionality while maintaining reliable charging efficiency across all supported configurations.
3Adaptability or versatility
If the receiving coil is positioned at different distances from the transmitting coil, then different use configurations are supported, but the magnetic flux received varies significantly causing charge rate deviations greater than 20%
Solution Approach 1:
The patent uses asymmetry in the receiving coil design with flat and rounded portions specifically shaped to compensate for variations in magnetic flux at different distances from the transmitting coil. This asymmetric geometry maintains substantially uniform charge rates across different use configurations, resolving the contradiction by prioritizing charge rate consistency over simple positional adaptability.
Solution Approach 2:
The patent implements parameter changes by varying the geometric parameters of the asymmetrical receiving coil - specifically the dimensions and curvature of its flat and rounded portions - to optimize magnetic flux capture at different distances from the transmitting coil. These parameter adjustments enable the system to maintain manufacturing precision in terms of charge rate consistency while supporting multiple use configurations.
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 system maintains a charge rate deviation of less than 20% across multiple user-selectable positions, achieving charging efficiencies of 68-71%, significantly higher than traditional cylindrical solenoid designs.
Implementation Method 1
The transmitting coil and the receiving coil are shaped and positioned so as to charge the battery at a substantially uniform rate when the planar wireless accessory is positioned relative to the planar electronic device according to a select charging configuration of multiple user-selectable charging configurations
Data Source
AI summary
A wireless charging system for a planar wireless accessory includes a receiving coil positioned within the planar wireless accessory and a transmitting coil positioned within a planar electronic device. The transmitting coil generates a magnetic flux that is received by the receiving coil to charge a battery of the planar wireless accessory when the planar wireless accessory is positioned relative to the planar electronic device according to a select charging configuration of multiple user-selectable charging configurations. The transmitting coil and the receiving coil are shaped and positioned to charge the battery at a substantially uniform rate at each different one of the multiple user-selectable charging configurations.