Wireless Power Circuit Board Segmentation for Interference Reduction
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Solution Overview
Problem
Wired charging solutions for electric vehicles are cumbersome and inconvenient, and existing wireless charging systems face challenges in efficiently and safely transferring power while minimizing interference and simplifying manufacturing.
Innovation Solution
A wireless power transfer system comprising a circuit board with planar coils and ferromagnetic structures, divided into areas for high and low voltage components, where feeds pass through the circuit board without penetrating the ferromagnetic structure, enabling efficient power transfer and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feeds penetrate the ferromagnetic structure to connect high voltage components, then electrical connection is achieved, but interference and manufacturing complexity increase
Solution Approach 1:
The patent introduces an intermediary approach where feeds connect to high voltage components through the circuit board edges rather than penetrating the ferromagnetic structure. This mediator path (circuit board trace) eliminates direct penetration through the ferromagnetic material, reducing manufacturing complexity while maintaining reliable electrical connection.
Solution Approach 2:
The circuit board is segmented into distinct high voltage and low voltage areas. High voltage components are positioned in a dedicated high voltage area where feeds can access them through the circuit board edge without penetrating the ferromagnetic structure, separating the connection path from the ferromagnetic material.
2Area of stationary object
If high voltage and low voltage components are placed close together, then device size is reduced, but interference between voltage components increases
Solution Approach 1:
The circuit board is divided into distinct high voltage and low voltage areas with different electrical characteristics. By assigning specific regions for high voltage components and low voltage components, the patent creates localized zones with appropriate electrical properties, reducing interference while maintaining compact overall device size.
Solution Approach 2:
A ground plane or shielding layer acts as an intermediary between high voltage and low voltage areas on the circuit board. This mediator structure provides electromagnetic shielding and reference potential, allowing close placement of high and low voltage components while minimizing mutual interference.
3Reliability
If feeds pass through the circuit board in the first area, then connection to low voltage components is achieved, but thermal stress and interference increase
Solution Approach 1:
The circuit board is designed with differentiated areas: the first area (low voltage area) allows feed penetration for low voltage connections, while the second area (high voltage area) prevents feed penetration. This local differentiation reduces thermal stress by concentrating penetration points in areas with lower thermal and electrical stress.
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 system provides convenient, safe, and efficient wireless charging for electric vehicles by minimizing interference and simplifying manufacturing, with reduced thermal stresses and costs, while maintaining effective power transfer capabilities.
Implementation Method 1
providing a ferromagnetic structure disposed along a first side of one or more planar coils
Implementation Method 2
one or more planar coils...conveying wireless power
Data Source
AI summary
One aspect of the disclosure provides an apparatus for conveying wireless power. The apparatus comprises a circuit board disposed along one or more planar coils and a plurality of feeds. The circuit board is divided into a first area separate from a second area. The first area has a plurality of first voltage components and the second area has a plurality of second voltage components. The first voltage components operates at a lower voltage than the second voltage components. The plurality of feeds are coupled to the one or more planar coils and the circuit board. The plurality of feeds pass through the circuit board within the second area along a side of the circuit board and couple to one or more of the second voltage components.