Wireless Power Module Coil Positioning and Thermal Shielding
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Solution Overview
Problem
Existing wireless power transmission modules face challenges in precisely arranging planar coils according to certification standards, leading to inconvenient assembly and potential misalignment, and the protective films used for heat radiating members are weak and prone to damage from external impacts.
Innovation Solution
A wireless power transmission module design featuring a supporting plate with seating grooves to fix the positions of planar coils, combined with a metallic protective film for enhanced rigidity and heat dissipation, and a heat radiating plate made of materials like copper or aluminum for improved thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If adhesive is used to bond coils to suppress displacement, then position stability is improved, but assembly convenience deteriorates and correction becomes difficult
Solution Approach 1:
The patent replaces the chemical bonding mechanism (adhesive) with a mechanical positioning system consisting of positioning protrusions and positioning grooves. This allows coils to be precisely positioned and fixed through geometric interlocking rather than chemical adhesion, enabling easy assembly, disassembly, and correction without the limitations of bonded joints.
2Length of stationary object
If protective film is made thin to reduce thickness, then compactness is improved, but strength and impact resistance deteriorate
Solution Approach 1:
The patent employs a composite protective film structure consisting of multiple layers with different functions: a base film layer providing mechanical strength and tear resistance, and a fluororesin coating layer providing low-friction and protective properties. This composite structure achieves both thin overall thickness and high strength by combining materials with complementary properties rather than relying on a single thick material.
3Manufacturing precision
If three planar coils are precisely arranged according to certification standard, then wireless charging performance is improved, but assembly complexity increases
Solution Approach 1:
The patent incorporates positioning protrusions and positioning grooves directly into the supporting plate structure during manufacturing, establishing predetermined accurate positions for the three planar coils before assembly. This preliminary positioning system ensures that when coils are installed, they automatically align with the required precision for wireless charging certification without requiring complex adjustment procedures during assembly.
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 design simplifies the alignment and assembly of planar coils, enhances the rigidity and protection of the module, and improves heat dissipation without increasing the thickness of the heat radiating plate, thus addressing the issues of misalignment and weak protective films.
Implementation Method 1
a heat radiating plate which is disposed on one surface of the magnetic field shielding sheet
Implementation Method 2
to increase a charging efficiency by discharging the heat generated at the time of wireless charging to the outside
Implementation Method 3
The magnetic field shielding sheet shields a magnetic field generated by the antenna unit to suppress external leakage of the magnetic field and concentrate the magnetic field in a desired direction
Implementation Method 4
a primary coil (a power transmitting coil) is provided in the wireless power transmission module and a secondary coil (an induction coil or a power receiving coil) is provided in the wireless power reception module so that when the portable terminal approaches the charger, the portable terminal is charged by inductive coupling between the primary coil and the secondary coil
Data Source
AI summary
A wireless power transmission module is provided. According to an exemplary embodiment of the present disclosure, a wireless power transmission module includes an antenna unit, a magnetic field shielding sheet, and a planar heat radiating plate. The antenna unit includes at least one wireless power transfer antenna. The magnetic field shielding sheet shields a magnetic field generated by the antenna unit to suppress external leakage of the magnetic field and concentrate the magnetic field in a desired direction. The planar heat radiating plate which is disposed on one surface of the magnetic field shielding sheet to release heat generated by the antenna unit. The wireless power transmission module is equipped or embedded in a vehicle to be used to charge a main battery of a portable terminal.