Wireless Power Receiver Shielding for Magnetic Field Isolation
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Solution Overview
Problem
Wired charging solutions for electric vehicles are cumbersome and inefficient, lacking convenience and safety due to the need for physical connections, which can be prone to mechanical wear and exposure to environmental elements.
Innovation Solution
A wireless power transfer system utilizing magnetic field distribution optimization to efficiently transfer power to electric vehicles, featuring a coil configuration with optimized volumes for electronic components and shielding to reduce magnetic field exposure, allowing for safe and efficient charging without physical connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired charging connections are used, then reliable power transfer is achieved, but mechanical wear and environmental exposure increase
Solution Approach 1:
The patent replaces the mechanical wired charging connection system with a wireless electromagnetic induction system. The transmitter coil generates a magnetic field that induces current in the receiver coil, eliminating physical connectors, cables, and associated mechanical wear while maintaining reliable power transfer to the battery.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary medium to transfer power between the charging source and battery. The transmitter coil converts electrical power to a magnetic field, which then induces current in the receiver coil, serving as a non-contact intermediary that eliminates direct mechanical connection while ensuring reliable power delivery.
2Ease of operation
If wireless power transfer is implemented, then convenience and safety are improved, but magnetic field interference with electronic components increases
Solution Approach 1:
The patent divides the device housing into distinct segmented volumes: a first volume containing the receiver coil where strong magnetic fields are present for power reception, and a second volume containing electronic components where magnetic field exposure is minimized. This spatial segmentation allows wireless charging functionality while protecting sensitive electronics from interference.
Solution Approach 2:
The patent extracts electronic components from the high magnetic field region and places them in a separate shielded volume. By removing vulnerable components from the transmitter coil's magnetic field environment, the system maintains charging convenience while eliminating magnetic field interference risks.
3Device complexity
If electronic components are placed in high magnetic field regions, then device complexity is reduced, but component reliability decreases
Solution Approach 1:
The patent segments the housing into functionally optimized volumes that naturally guide component placement. The first volume is designed for the receiver coil with appropriate magnetic field characteristics, while the second volume is designed for electronic components with reduced magnetic field exposure, achieving both structural simplicity and component reliability through functional zoning.
Solution Approach 2:
The patent applies local quality optimization by creating different magnetic field environments in different spatial regions. The receiver coil region maintains strong magnetic fields for efficient power transfer, while the electronic component region provides shielded low-field conditions, allowing each component type to operate in its optimal environmental zone without increasing overall device complexity.
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
Enables convenient, safe, and efficient wireless charging of electric vehicles by minimizing mechanical wear and environmental exposure, while maintaining reliable power transfer and aesthetic appeal, with the potential for vehicle-to-grid energy stabilization.
Implementation Method 1
a coil configured to wirelessly receive power via a magnetic field generated by a transmitter
Implementation Method 2
The second volume can be bound by a horizontal shielding member along a first portion of the second volume
Implementation Method 3
The second volume can also be bounded by a vertical shielding member along a second portion of the second volume
Data Source
AI summary
In a particular embodiment, a wireless power receiver apparatus includes a coil configured to wirelessly receive power via a magnetic field generated by a transmitter. The wireless power receiver apparatus can include a housing that includes a first volume configured to house the coil. The housing can also include a second volume configured to house electronic components. The second volume can be bound by a horizontal shielding member along a first portion of the second volume. The horizontal shielding member can define a horizontal shielding member plane substantially parallel to a plane defined by the coil. The second volume can also be bounded by a vertical shielding member along a second portion of the second volume. The vertical shielding member can define a vertical shielding member plane substantially orthogonal to the plane defined by the coil.