Wireless Charging Coil Geometry for Flexible 3D Alignment

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Solution Overview

Problem

Existing wireless charging systems for devices like electric vehicles require precise alignment of charger and receiver coils, leading to high position dependence, inefficiencies, and excessive electromagnetic emissions, making them inconvenient and unsafe for use.

Innovation Solution

The system incorporates magnetic field guiding and magnetic coupling techniques to create a low reluctance path for magnetic flux, allowing for flexible 3D positioning and reduced EM emissions, using extended magnetic layers and a crossed charger and receiver coil geometry to enhance power transfer efficiency and alignment tolerance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If precise alignment of charger and receiver coils is required, then power transfer efficiency is improved, but ease of operation deteriorates due to high position dependence

Engineering Contradiction:

Improvepower transfer efficiencyVSAvoidease of operation

Core Design Contradiction:

Loss of energyVSEase of operation

Solution Approach 1:

The magnetic field space is segmented into multiple zones using magnetic field guiding structures, creating distinct high-efficiency transfer zones. This segmentation allows the receiver to be positioned within an optimized zone while maintaining efficiency, reducing the need for precise alignment across the entire charging surface.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Magnetic field guiding structures act as intermediaries between the charger and receiver coils. These structures shape and direct the magnetic flux, creating a controlled magnetic pathway that maintains coupling efficiency even when the receiver is not precisely aligned with the charger, thus mediating the alignment requirement.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If charger and receiver coils are aligned and of comparable size, then power transfer efficiency is improved, but adaptability deteriorates due to limited positioning flexibility

Engineering Contradiction:

Improvepower transfer efficiencyVSAvoidpositioning flexibility

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The patent extends the magnetic field interaction from a single-plane alignment problem to a three-dimensional space by incorporating vertical magnetic field guiding structures. This dimensional extension creates a volumetric magnetic field region where receivers can be positioned with flexibility in multiple directions while maintaining efficient coupling.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The magnetic field guiding structures serve multiple functions: they concentrate magnetic flux for efficiency, extend the effective charging zone for flexibility, and provide structural support. This multi-functionality allows the system to maintain high efficiency while accommodating various receiver positions and orientations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If wireless power charging is implemented, then convenience is improved, but harmful factors worsen due to excessive electromagnetic emissions

Engineering Contradiction:

ImproveconvenienceVSAvoidelectromagnetic emissions

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

Magnetic shielding materials are strategically placed in specific locations where electromagnetic emissions would be harmful, creating localized protection zones. This selective shielding approach reduces EM emissions in sensitive areas while maintaining the overall wireless charging functionality and convenience.

Inventive Principle:

Principle #3Local quality

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 approach results in higher efficiency, lower EM emissions, and safer operation by allowing vehicles to be charged with greater positional flexibility, reducing unwanted electromagnetic interference and improving power transfer efficiency.

Implementation Method 1

create a low reluctance path for magnetic flux

Methodology Applied

Scientific EffectMagnetic flux: Magnetic Field

Implementation Method 2

magnetic coupling techniques to create a low reluctance path for magnetic flux

Methodology Applied

Scientific EffectMagnetic coupling: Electromagnetic Induction

Implementation Method 3

wireless power transfer, and a wireless power receiver in combination, to provide a means for transfer of power across a distance

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20240375528A1Charging or powering devices, including mobile devices, machines or equipment

Publication Date: 2024.11.14 MOJO MOBILITY INC

AI summary

Described herein are systems and/or methods for enabling efficient wireless power transfer and charging of devices and/or batteries. In some embodiments, provided are freedom of placement of the devices and/or batteries in one or multiple (e.g., one, two or three) dimensions, and/or improved features such as ease of use and compatibility. Exemplary applications include beam inductive or magnetic charging and power for use in, e.g., mobile, electronic, electric, lighting or other devices, machines, batteries, power tools, kitchen, military, medical, industrial tools or systems, robots, trains, buses, trucks and/or vehicles, and other environments.