Wireless Charging Coil Alignment via Dual Induction Signal Detection
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Solution Overview
Problem
Current wireless charging systems suffer from low alignment precision between the power transmit and receive coils, requiring manual visual alignment by drivers, which reduces efficiency and accuracy.
Innovation Solution
A wireless charging alignment apparatus comprising a power receive coil, a location detection coil, a first detection circuit, a second detection circuit, and a location determining circuit that uses induction signals to determine the relative location of the coils, improving alignment precision and efficiency by detecting and processing signals to adjust coil positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual visual alignment method is used, then the system structure remains simple, but alignment precision is low
Solution Approach 1:
The patent replaces manual visual alignment (mechanical observation method) with electromagnetic induction-based automatic alignment. The power transmit coil generates a positioning magnetic field, and the power receive coil detects induction signals to automatically determine relative position, substituting human visual measurement with electromagnetic detection to achieve higher precision.
Solution Approach 2:
The system enables automatic alignment through the power receive coil's own induction signal detection capability. The power receive coil automatically detects the positioning magnetic field generated by the power transmit coil and uses the induction signal to determine its relative position, eliminating the need for external alignment tools or manual intervention.
2Productivity
If manual visual alignment is used, then device complexity is low, but alignment efficiency is low
Solution Approach 1:
The patent replaces manual visual alignment operations with automated electromagnetic detection. The system uses the power transmit coil to generate a positioning magnetic field and the power receive coil to detect induction signals, automatically calculating relative position and providing alignment guidance, thereby significantly improving alignment efficiency.
Solution Approach 2:
The system implements feedback by detecting the induction signal strength and using it to determine the relative position between coils. The alignment guidance information is generated based on this feedback, continuously guiding the adjustment until optimal alignment is achieved, thereby improving alignment efficiency.
3Measurement precision
If induction signal detection is implemented, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the power receive coil serve dual functions: it acts as both the power receiving component and the position detection component. By utilizing the same coil for both power wireless reception and position detection through induction signal analysis, the system avoids adding separate detection hardware, thus improving precision without significantly increasing complexity.
Solution Approach 2:
The system merges the power reception function and position detection function into a single integrated system. The power receive coil simultaneously performs power wireless reception and relative position detection by analyzing induction signals, combining multiple functions into one component to minimize system 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
Enhances alignment precision and efficiency by allowing the coils to be accurately aligned based on detected induction signals, improving the overall charging process.
Implementation Method 1
The first detection circuit is configured to detect a first induction signal of the power receive coil in a positioning magnetic field generated by the power transmit coil. The second detection circuit is configured to detect a second induction signal of the location detection coil in the positioning magnetic field.
Data Source
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AI summary
This application provides a wireless charging alignment method and apparatus, a wireless charging system, and an electric vehicle, and belongs to the field of wireless charging. In the wireless charging alignment apparatus, a first detection circuit may detect a first induction signal of a power receive coil in a positioning magnetic field generated by a power transmit coil; a second detection circuit may detect a second induction signal of a location detection coil in the positioning magnetic field; and a location determining circuit may determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal. Compared with a related art in which a driver visually detects relative locations of two coils, in this embodiment of this application, precision of the relative locations determined based on the two types of induction signals is higher. Therefore, precision of alignment between the power receive coil and the power transmit coil can be effectively improved.