Wireless Power Transmitter Cooling via Convection Guide Module
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Solution Overview
Problem
Existing wireless power transmitters face challenges in efficiently cooling the internal components, leading to heat management issues during wireless charging of electronic devices.
Innovation Solution
A wireless power transmitter design incorporating a coil module, a blowing module for convective cooling, and a guide module that directs cooled fluid outside the device, along with a circuit board cooling system, to effectively manage heat generated during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power transmission is performed using a coil module, then power can be transmitted wirelessly to electronic devices, but heat is generated inside the body leading to cooling issues
Solution Approach 1:
The harmful heat generated by the coil module is extracted and removed from the system by directing cooling fluid through channels that pass through the coil assembly, carrying heat outside the body to be dissipated, thereby resolving the thermal accumulation problem while maintaining continuous power transmission
Solution Approach 2:
A cooling fluid is introduced as an intermediary substance that absorbs heat from the coil module through convection and transports it away from the heat-generating components, enabling thermal management without interfering with the wireless power transmission function
2Temperature
If cooling fluid is circulated inside the body to cool components, then heat can be dissipated, but the structure becomes more complex with additional cooling channels and components
Solution Approach 1:
The guide module serves multiple functions: it structures the cooling fluid flow paths, provides structural support for the coil assembly, and facilitates heat transfer from multiple components (coil and circuit board) through integrated cooling channels, thereby reducing overall system complexity while achieving effective cooling
Solution Approach 2:
The cooling channels are merged with the structural framework of the wireless power transmitter, and the guide module combines flow direction, structural support, and thermal management functions into a single integrated component, simplifying the overall cooling system architecture
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 proposed design significantly reduces the temperature of both the coil and circuit board modules, enhancing the efficiency and reliability of wireless charging by effectively dissipating heat, with the coil module temperature reduced from 62°C to 47°C and circuit board temperature from 40°C to 29°C during charging.
Implementation Method 1
a blowing module configured to cool the coil module by moving a fluid by convection
Implementation Method 2
a guide module extending from the blowing module to outside of the body such that the fluid from the blowing module is discharged to outside of the body after cooling the coil module
Implementation Method 3
The proposed design significantly reduces the temperature of both the coil and circuit board modules, enhancing the efficiency and reliability of wireless charging by effectively dissipating heat
Data Source
AI summary
A wireless power transmitter includes a body having a coil module therein, and configured to transmit power in a wireless manner, a blowing module configured to cool the coil module by moving a fluid by convection and a guide module extending from the blowing module to outside of the body such that the fluid from the blowing module is discharged to outside of the body after cooling the coil module. The coil module has a shape corresponding to an outer circumference of the coil module partially or wholly.