Wireless Charging Pad Gap Adjustment for EV Misalignment
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Solution Overview
Problem
Existing wireless charging systems for electric vehicles face challenges in efficiently adapting to varying vehicle sizes and misalignments, particularly in the vertical direction, which affects charging efficiency.
Innovation Solution
The system adjusts the size of the gap between upper and lower charging pads by repositioning the upper pad along the X-axis, moving the movable magnetic structure of the lower pad along the Z-axis, or a combination of both, to optimize charging parameters for vehicles of different sizes and alignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless charging pads are optimized for charging efficiency with fixed alignment, then charging efficiency is improved, but adaptability to different vehicle sizes and misalignments deteriorates
Solution Approach 1:
The patent implements adjustable gap structures that allow the wireless charging system to dynamically adapt the vertical distance between primary and secondary charging pads. This dynamic adjustment enables the system to maintain optimal charging efficiency across different vehicle sizes and alignment conditions, resolving the contradiction between fixed-configuration efficiency and adaptive versatility.
Solution Approach 2:
The system changes the physical parameter of the air gap distance between charging pads to optimize performance. By allowing the gap size to vary based on vehicle type and alignment, the system maintains efficient power transfer across different operating conditions, thereby achieving both high charging efficiency and adaptability to different vehicle sizes.
2Device complexity
If the gap between charging pads is fixed, then system complexity is reduced, but misalignment tolerance deteriorates
Solution Approach 1:
The patent introduces adjustable gap mechanisms that allow the charging system to adapt to misalignments between primary and secondary pads. This dynamic adjustment capability improves misalignment tolerance and reliability without requiring overly complex active control systems, as the adjustment can be implemented through mechanical or positional modifications to the pad structures.
3Use of energy by moving object
If wireless charging pads are designed for specific vehicle types, then charging efficiency is improved, but versatility across different vehicle types deteriorates
Solution Approach 1:
The patent designs wireless charging pads with adjustable gap capabilities that enable a single charging station to serve multiple vehicle types efficiently. By making the gap distance adjustable, the system becomes universal and can adapt to different vehicle sizes and configurations while maintaining optimal charging efficiency for each type, thereby achieving both efficiency and versatility.
Solution Approach 2:
The system modifies the gap parameter to accommodate different vehicle types. This parameter adjustment allows the same charging infrastructure to efficiently charge various vehicle sizes by optimizing the vertical distance between charging pads for each specific vehicle type, achieving versatility without sacrificing charging efficiency.
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 adjustment enhances misalignment tolerance, allowing efficient charging of vehicles of varying sizes and improving charging efficiency by optimizing the air gap between charging pads.
Implementation Method 1
power is wirelessly transmitted via wireless charging pads
Implementation Method 2
moving the movable magnetic structure of the lower pad along the Z-axis
Data Source
AI summary
Described herein is a wireless transfer system that includes a lower charging pad having at least one first winding, the at least one first winding configured to, upon being provided a first current, cause a second current to be induced in the at least one second winding of an upper charging pad. The lower charging pad comprises a combination of one or more inclined portions and a position adjustment mechanism positioned under a movable magnetic structure within the lower charging pad. Parameters of the second current is dependent upon a size of a gap between the one or more first vertical portions and the one or more inclined portions, the size of the gap being adjusted by first changing a position of the one or more vertical portions with respect to the one or more inclined portions.