Wireless Charger Wind Tunnel Cooling
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Solution Overview
Problem
Wireless charging of electronic devices often leads to temperature increases, causing high-wattage fast charge modes to be terminated, resulting in longer charging times as devices attempt to maintain temperature below a certain threshold.
Innovation Solution
A wireless charger design featuring a wind tunnel formed between a thermal-conductive plastic cover and a circuit board, utilizing heat conduction and fan-forced convection to dissipate heat, maintaining the device's temperature below 40°C and allowing extended high-wattage charging periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging is performed at high wattage, then charging speed is improved, but temperature increases causing charge mode termination
Solution Approach 1:
The patent extracts the heat dissipation function from the main charging structure by creating a separate wind tunnel cooling system. This allows the charging process to continue at high wattage while heat is actively removed through the dedicated airflow path, preventing temperature-induced charge mode termination.
Solution Approach 2:
The patent introduces air as an intermediary cooling medium that flows through the wind tunnel formed between the thermal-conductive plastic cover and circuit board. This air flow acts as a mediator to transfer heat away from the charging components, enabling sustained high-wattage operation without excessive temperature rise.
2Productivity
If temperature is reduced to maintain charge mode, then charging speed is maintained, but charging time increases
Solution Approach 1:
The wind tunnel cooling system enables continuous high-wattage charging by continuously removing heat throughout the charging process. This prevents intermittent charge mode switching and maintains uninterrupted fast charging, reducing total charging time compared to systems that must periodically reduce power to manage temperature.
3Temperature
If thermal-conductive plastic cover is used, then heat dissipation is improved, but structural complexity increases
Solution Approach 1:
The patent combines the thermal conduction function and wind tunnel formation into a single integrated plastic cover structure. This cover simultaneously conducts heat away from the charging components and provides the upper boundary of the wind tunnel for airflow, eliminating the need for separate cooling components and reducing overall structural complexity.
Solution Approach 2:
The thermal-conductive plastic cover serves multiple functions: it acts as a thermal conduction path for heat dissipation, forms the upper boundary of the wind tunnel structure, and provides mechanical support for the charging assembly. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure.
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 effectively keeps the electronic device's temperature under 40°C, preventing power derating and enhancing user experience by maintaining high-wattage charging for longer durations while minimizing noise.
Implementation Method 1
a thermal-conductive plastic cover, comprising an insulating and heat-conducting material
Implementation Method 2
a wind tunnel is formed between the thermal-conductive plastic cover and the circuit board for lowering the temperature of an electronic device
Data Source
AI summary
A wireless charger, comprising: a thermal-conductive plastic cover; a first circuit board; and a metallic case, wherein the first circuit board are disposed in the metallic case, wherein a wind tunnel is formed between the thermal-conductive plastic cover and the circuit board for lowering the temperature of an electronic device that is wirelessly charged on the thermal-conductive plastic cover.