Context-Aware Wireless Charging Coils for Heat and Object Detection
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Solution Overview
Problem
Existing wireless charging technologies face challenges in improving efficiency, thermal performance, and detection of external objects, while also enabling operation at greater distances between charger and receiver coils.
Innovation Solution
The development of a wireless charger system that incorporates advanced features such as improved thermal management using thermally conductive layers, foreign object detection, and higher Quality Factor resonance circuits to enhance power transfer efficiency and distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inductive charging is implemented, then wireless power transfer is enabled, but thermal performance deteriorates due to heat generation
Solution Approach 1:
A thermally conductive layer is introduced as an intermediary component between the coil assembly and the charging surface. This layer acts as a heat transfer mediator, conducting away excess heat generated during inductive charging operations to improve thermal performance while maintaining wireless power transfer functionality.
Solution Approach 2:
The patent modifies thermal parameters by incorporating materials with specific thermal conductivity properties into the charging assembly. By changing the thermal characteristics of the charging surface through material selection and layer configuration, the system manages heat generation during wireless power transfer.
2Loss of energy
If coil assembly density is increased, then power transfer efficiency improves, but detection of external objects deteriorates
Solution Approach 1:
The coil assembly is divided into multiple discrete coil segments rather than using a single dense coil structure. This segmentation allows the system to maintain power transfer efficiency through coordinated operation of multiple coils while creating spatial distribution that improves the ability to detect external objects by monitoring individual coil responses.
3Ease of operation
If operating distance is increased, then user convenience improves, but power transfer efficiency deteriorates
Solution Approach 1:
The charging system incorporates dynamic adjustment capabilities that allow the coil assembly to adapt its operational parameters based on the distance and position of the mobile device. This dynamic behavior enables the system to maintain acceptable power transfer efficiency across a broader range of operating distances, thereby improving user convenience.
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 achieves better thermal performance, improved detection of external objects, and increased power transfer efficiency, allowing for operation at greater distances between charger and receiver coils.
Implementation Method 1
a coil assembly including a plurality of coils arranged in a grid pattern
Implementation Method 2
improved thermal management using thermally conductive layers
Implementation Method 3
higher Quality Factor resonance circuits to enhance power transfer efficiency
Data Source
AI summary
A system and method for contextually aware charging of mobile devices. In accordance with an embodiment, the system comprises a base unit having one or more charger coils, for use in inductive charging; and one or more components within the base unit for providing context-aware connectivity and/or other capabilities with a mobile device. When a mobile device having one or more receiver coils or receivers associated with, is placed in proximity to the base unit, the charger coil is used to inductively generate a current in the receiver coil or receiver associated with the mobile device, to charge or power the mobile device, and at the same time the context-aware connectivity and/or other capabilities are initiated. In accordance with various embodiments, the base unit and/or the mobile device can adapt to a location or use model of interest to provide different functionalities, applications and features.