Series Coil Assembly for Wireless Charging and NFC
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Solution Overview
Problem
Existing wireless charging devices face challenges in achieving optimal charging and communication performance while maintaining a thin form factor, as the conventional coil winding methods do not adequately meet the requirements for better performance and reduced thickness.
Innovation Solution
A wireless device with a coil assembly comprising a first and second coil connected in series, where the first coil forms a near field communication circuit loop and the second coil operates as a transmitting or receiving terminal for electrical power transmission, with a unique spiral structure and connecting members to enhance performance and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coil winding methods are used, then the device structure is simple, but the charging performance and communication performance are insufficient
Solution Approach 1:
The coil structure is divided into multiple independent coils (first coil, second coil, third coil, fourth coil) arranged in a specific pattern. Each coil can be independently controlled to perform different functions such as wireless charging and NFC communication, thereby improving performance while maintaining manageable complexity through modular design
Solution Approach 2:
The coil assembly is designed to perform multiple functions simultaneously. The same coil structure supports both wireless charging operations and NFC communication functions by configuring different coils or combinations of coils for different operational modes, eliminating the need for separate dedicated structures for each function
2Reliability
If conventional coil winding methods are used, then the manufacturing process is simple, but the communication performance and charging performance are insufficient
Solution Approach 1:
The coils are arranged in a nested or overlapping configuration where coils are positioned in relation to each other in a compact manner. This nested arrangement improves electromagnetic field distribution for better communication and charging performance while maintaining a compact form factor that simplifies integration into the device
3Reliability
If thicker coil structures are used, then better charging performance is achieved, but the device thickness increases
Solution Approach 1:
The coil structure transitions from a conventional planar two-dimensional arrangement to a three-dimensional configuration with coils positioned at different heights and angles. This spatial arrangement improves charging performance through better magnetic field concentration while maintaining thin overall device thickness by utilizing vertical space efficiently
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 enables simultaneous wireless communication and charging capabilities while reducing the overall impedance and thickness of the device, achieving improved performance and miniaturization.
Implementation Method 1
the first circuit loop operates in a near field communication band
Implementation Method 2
the second circuit loop operates as a transmitting terminal or a receiving terminal in electrical power transmission
Implementation Method 3
the wireless charging receiving terminal in the electronic device can generate current to charge the battery by electromagnetic induction or electromagnetic resonance
Implementation Method 4
the magnetic conductive plate can concentrate the magnetic lines of force emitted from the coil for better performance
Data Source
AI summary
A wireless device is provided and includes a coil assembly. The coil assembly includes a first coil, a second coil, a first contact, a second contact, and a third contact. The second coil is configured to be connected to the first coil in series. The first contact is configured to be connected to a first end of the first coil. The second contact is configured to be connected between the first coil and the second coil. The third contact is configured to be connected to a second end of the second coil. The first contact, the first coil and the second contact form a first circuit loop, and the first contact, the first coil, the second coil and the third contact form a second circuit loop.