Wireless Charging Coil Assembly With NFC and Airflow Cooling
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Solution Overview
Problem
Conventional wireless charging devices for vehicles with NFC functions face increased costs and cooling issues due to the need for a separate PCB with a built-in NFC antenna, which limits design flexibility and heat dissipation.
Innovation Solution
The implementation of a shielding assembly with a bracket for the NFC coil, allowing the NFC function to be performed without a separate PCB, enabling design freedom and improved cooling by forming a space for air flow between the coils and the case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate PCB with a built-in NFC antenna is added to perform NFC function, then NFC functionality is achieved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent combines the NFC antenna function with the existing wireless charging coil structure. The NFC antenna is integrated into the shielding assembly that already houses the first coil for power transfer, eliminating the need for a separate PCB with NFC antenna. This merging of functions reduces device complexity while maintaining NFC functionality.
Solution Approach 2:
The shielding assembly is designed to serve multiple functions: it provides electromagnetic shielding for the first coil, supports the NFC coil for NFC operations, and acts as a structural component of the wireless charging device. This multi-functionality eliminates the need for separate dedicated components for each function.
2Adaptability or versatility
If a separate PCB with a built-in NFC antenna is added to perform NFC function, then NFC functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The NFC antenna is integrated into the existing shielding assembly structure, combining multiple functions into a single component. This reduces the total bill of materials and assembly steps, thereby lowering manufacturing cost while achieving NFC functionality.
3Adaptability or versatility
If the wireless charging device structure is modified to accommodate NFC components, then NFC function is added, but heat dissipation capability deteriorates
Solution Approach 1:
The NFC coil is integrated into the shielding assembly that already contains the first coil, creating a unified structure. This integration allows for coordinated thermal management and maintains heat dissipation pathways without requiring separate cooling solutions for NFC components.
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 solution reduces manufacturing costs, enhances design flexibility, and addresses heat generation issues while maintaining effective NFC functionality.
Implementation Method 1
a first coil for power transfer by magnetic inductive coupling
Implementation Method 2
a shielding assembly where a shield, a first coil for power transfer by magnetic inductive coupling
Data Source
AI summary
The wireless charging device according to an embodiment may comprise a shielding assembly where a shield, a first coil for power transfer by magnetic inductive coupling, and a bracket are formed, an NFC coil fixed to the bracket, and a main PCB including an inverter that converts DC power into AC power and supplies it to the first coil. The bracket may be formed outside the first coil. The shielding assembly may further include a coil connector for connecting the first coil and the NFC coil to the main PCB. The coil connector may consist of a plurality of protruding pins, and the plurality of protruding pins may be inserted into holes formed at corresponding positions on the main PCB so that the first coil and the NFC coil are electrically connected to the main PCB.