Wireless Power Coil Selection via Detection Signals
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Solution Overview
Problem
Existing charging systems for battery packs face issues such as instantaneous discharge and self-discharge due to terminal contact and moisture, leading to reduced operational life and performance.
Innovation Solution
A wireless power transmission device with multiple power transmission coils that selectively controls the coils based on detection signals and response signals to optimize power transmission efficiency and mobility, using a transmission controller to output detection signals and select the appropriate coil for power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power transmission coils are used to improve mobility and charging coverage, then the adaptability and charging coverage are improved, but the device complexity and coil selection control difficulty increase
Solution Approach 1:
The power transmission system is divided into multiple independent coils (first power transmission coil and second power transmission coil), each capable of being independently controlled and selected based on the position of the battery pack, thereby improving charging coverage while maintaining manageable complexity through modular design
Solution Approach 2:
The controller performs preliminary detection by outputting detection signals through each coil before actual power transmission, and selects the appropriate coil in advance based on the received response signals, ensuring optimal charging coverage without requiring complex real-time switching during power transmission
2Productivity
If detection signals are transmitted through multiple coils to determine the best coil for power transmission, then the power transmission efficiency is improved, but the energy consumption for detection increases
Solution Approach 1:
Instead of continuously transmitting detection signals through all coils, the system transmits detection signals only when needed to determine battery pack position, and selects only the most suitable coil for actual power transmission, thereby achieving high power transmission efficiency while minimizing detection energy consumption through selective rather than exhaustive action
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 enhances power transmission efficiency and mobility by ensuring that power is transmitted through the most effective coil, reducing the risk of discharge and self-discharge, and maintaining battery performance.
Implementation Method 1
outputting a first detection signal and a second detection signal to a wireless power receiving device through a first power transmission coil and a second power transmission coil, respectively
Data Source
AI summary
One exemplary method for selectively controlling multiple power transmission coils may include: outputting a first detection signal and a second detection signal to a wireless power receiving device through first and second power transmission coils, respectively; detecting either or both of a first response signal and a second response signal generated from the wireless power transmission device respectively in response to the first detecting signal and the second detecting signal; selecting one of the first and second power transmission coils that corresponds to the detected one of the first and second response signals if only one of the first and the second response signals is detected; selecting one of the first and second power transmission coils if both of the first and second response signals are detected; and outputting a wireless power signal via the selected one of the first and second power transmission coil.