Wireless Charging Pad Airflow Channel for Heat Dissipation
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Solution Overview
Problem
Existing wireless charging devices face challenges in efficiently dissipating thermal energy generated during the charging process, leading to potential overheating of devices.
Innovation Solution
A wireless charging device design incorporating a thermally conductive and electrically insulative top housing with a channel for airflow to dissipate heat, optionally with an insert featuring protrusions to enhance heat transfer, and a main housing that can be thermally insulative to prevent heat transfer to the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless charging coil is used to transfer power, then power transfer efficiency is improved, but thermal energy generation increases causing overheating
Solution Approach 1:
The patent extracts the thermal management function from the main housing by introducing a separate channel structure that runs adjacent to the charging coil. This channel is specifically designed to guide airflow and carry away heat, separating the power transfer function (coil) from the thermal dissipation function (channel), thereby resolving the contradiction between efficient power transfer and heat generation.
Solution Approach 2:
The patent introduces air as an intermediary cooling medium that flows through the channel adjacent to the charging coil. This air current acts as a mediator between the heat-generating coil and the external environment, carrying thermal energy away without interfering with the electromagnetic field and power transfer process.
2Temperature
If housing material provides thermal conduction to dissipate heat, then heat dissipation is improved, but electrical insulation may be compromised
Solution Approach 1:
The patent applies different material properties to different parts of the housing structure. The channel walls adjacent to the charging coil are made of thermally conductive material to facilitate heat dissipation, while other portions of the housing maintain electrical insulation properties. This localized differentiation of material quality allows simultaneous achievement of heat dissipation and electrical safety.
Solution Approach 2:
The patent employs composite material construction in the housing, combining materials with different thermal and electrical properties in specific configurations. The channel structure uses materials that provide both thermal conduction for heat dissipation and electrical insulation for safety, creating a composite structure that satisfies both contradictory requirements.
3Temperature
If channel is added for airflow, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The channel structure serves multiple functions simultaneously: it acts as a thermal management pathway for airflow, provides structural support for the housing, and defines the spatial relationship between the charging coil and external environment. By making the channel multi-functional, the patent reduces the need for separate dedicated cooling components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the cooling channel function with the existing housing structure rather than adding a completely separate cooling system. The channel is integrated into the housing design, combining thermal management with the structural framework, thereby minimizing the increase in overall device complexity while still achieving effective heat dissipation.
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
Effectively mitigates thermal energy within the charging device and the device being charged by distributing heat evenly and efficiently through airflow, preventing overheating.
Implementation Method 1
the top housing is comprised of a thermally conductive and electrically insulative material
Implementation Method 2
the channel is configured to guide airflow along the bottom surface of the top housing to dissipate heat within the wireless charging device
Implementation Method 3
Wireless charging devices utilize magnetic coupling or inductive coupling to transfer power between the wireless charger and the device to be charged
Implementation Method 4
Wireless charging devices utilize magnetic coupling or inductive coupling to transfer power between the wireless charger and the device to be charged
Data Source
AI summary
A wireless charging device includes a main housing having a first end and a second end and a channel extending between the first end and the second end, a wireless charging coil located within the main housing separately from the channel, and a top housing located adjacent to the main housing and having a top surface and a bottom surface. The top surface is configured to receive a device to be charged, and the bottom surface is directly exposed to the channel, wherein the top housing is comprised of a thermally conductive and electrically insulative material, and wherein the channel is configured to guide airflow along the bottom surface of the top housing to dissipate heat within the wireless charging device.