Wireless Coil Module Structure for Thin Charging and Low EMI
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Solution Overview
Problem
Existing wireless transmission modules face challenges in achieving better charging and communication performance while maintaining a thin profile and minimizing electromagnetic interference, with existing coil winding structures not adequately addressing user needs for efficiency and mechanical strength.
Innovation Solution
A wireless transmission module design featuring a coil assembly and magnetically conductive elements with specific structural configurations, including protruding structures and adhesive elements, to concentrate electromagnetic fields and enhance electromagnetic wave distribution, mechanical strength, and heat dissipation, while reducing thickness and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetically conductive substrate is used to support the coil, then magnetic field concentration is improved, but device thickness increases
Solution Approach 1:
The magnetically conductive substrate is segmented into a first magnetically conductive element and a second magnetically conductive element positioned at different locations. This segmentation allows the magnetic field to be concentrated at multiple strategic points without requiring a single thick substrate, thereby maintaining charging performance while reducing overall module thickness.
Solution Approach 2:
Instead of using a uniform magnetically conductive substrate throughout, the patent applies magnetically conductive elements only at specific locations where field concentration is most beneficial. The first magnetically conductive element is positioned near the coil assembly while the second is positioned near the magnetically conductive target, creating local quality enhancements that improve charging performance without adding unnecessary thickness elsewhere.
2Productivity
If the coil is tightly wound to improve charging efficiency, then charging performance is improved, but mechanical strength decreases
Solution Approach 1:
The patent combines the coil assembly with the magnetically conductive substrate through adhesive bonding, creating an integrated structure. This merging allows the coil to be tightly wound for efficient charging while the substrate provides mechanical support and reinforcement, preventing the coil from deforming or breaking under stress.
Solution Approach 2:
An adhesive layer serves as an intermediary between the coil assembly and the magnetically conductive substrate. This adhesive mediator enables tight winding of the coil for efficient charging while transferring mechanical strength from the substrate to the coil, resolving the conflict between charging efficiency and mechanical strength.
3Reliability
If the magnetically conductive element is positioned close to the coil, then electromagnetic field concentration is improved, but electromagnetic interference increases
Solution Approach 1:
The magnetically conductive elements are segmented into multiple discrete positions rather than forming a continuous structure close to the coil. The first magnetically conductive element is positioned near the coil while the second is positioned near the target, creating controlled gaps that concentrate the electromagnetic field where needed while reducing continuous electromagnetic interference.
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 design improves mechanical strength, charging efficiency, heat dissipation, and miniaturization, while reducing electromagnetic interference and addressing assembly stability issues, thereby meeting user requirements for performance and compactness.
Implementation Method 1
the wireless charging receiving terminal in the electronic device generates current by electromagnetic induction or electromagnetic resonance
Implementation Method 2
the wireless charging receiving terminal in the electronic device generates current by electromagnetic induction or electromagnetic resonance
Implementation Method 3
the magnetically conductive substrate can concentrate the magnetic lines of force emitted from the coil for better performance
Data Source
AI summary
A wireless transmission module for transmitting energy or signals includes a first magnetically conductive element, a first coil assembly and a first adhesive element. The first coil assembly and the first magnetically conductive element are arranged along a main axis. The first adhesive element is configured to be adhered to the first coil assembly and the first magnetic conductive element. The first adhesive element is disposed between the first coil assembly and the first magnetically conductive element.