Wireless Charging Pad Thermal Management via Magnetic Shield
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Solution Overview
Problem
Current wireless power delivery systems for information handling systems face challenges in efficiently managing heat dissipation and power distribution, leading to potential overheating and suboptimal operating conditions for devices being charged.
Innovation Solution
The implementation of a wireless charging pad with convection cooling and thermal control mechanisms, including inclined surfaces for natural airflow and thermally conductive magnetic shields, along with heat pipes and temperature sensors to regulate power transfer based on device conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power delivery is implemented, then power transfer capability is improved, but heat dissipation becomes problematic
Solution Approach 1:
A magnetic shield serves as an intermediary component between the wireless power delivery system and the device being charged. The magnetic shield includes a thermally conductive layer that conducts heat away from the device, and a magnetically permeable layer that shields the device from magnetic fields, thereby managing heat dissipation while enabling power transfer
Solution Approach 2:
The patent replaces active cooling mechanisms with passive thermal management using thermally conductive materials and heat sinks integrated into the magnetic shield structure, eliminating the need for mechanical cooling systems while effectively managing heat dissipation
2Temperature
If thermal management components are added, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated magnetic shield structure: magnetic field shielding, thermal conduction, and heat dissipation. This merging of functions achieves effective temperature control without proportionally increasing device complexity, as one component performs multiple protective and management roles
Solution Approach 2:
The magnetic shield is designed as a multi-functional component that simultaneously provides magnetic shielding, thermal management, and structural support. The thermally conductive layer and magnetically permeable layer work together to achieve multiple objectives within a single device element, reducing overall 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
This solution effectively manages heat dissipation through natural convection and dynamic power regulation, ensuring efficient and safe charging of information handling systems by maintaining optimal operating temperatures and power levels.
Implementation Method 1
The antenna can include a heat pipe arranged in a loop configuration
Implementation Method 2
heat pipes and temperature sensors to regulate power transfer
Implementation Method 3
The charging pad can include an inclined top surface that promotes natural convection airflow
Implementation Method 4
thermally conductive magnetic shields
Data Source
AI summary
A mobile computing device includes a body having a front side and a back side, and an easel adapted to fit in a first position within an indentation formed in the back side. The easel is movable to a second position, and a wireless power receiver coil is disposed in the easel. A universal hinge connects the easel to the body.