Wireless Power Supply System with Identification Data Excitation
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Solution Overview
Problem
Conventional wireless charging systems for vehicles require a long time to pair after a vehicle enters a parking space, leading to delayed charging initiation.
Innovation Solution
A wireless power supply system with a power transmission device on the ground and a power reception device on the vehicle, where the power transmission coil is excited in a specific pattern containing identification data, allowing the power reception device to pre-charge a capacitor and quickly match identification data, enabling rapid pairing and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power transmission coil transmits a random signal for pairing detection, then the vehicle and power transmission device can be paired, but it takes a long time before charging starts after the vehicle stops in the parking space
Solution Approach 1:
The power transmission coil performs preliminary actions by transmitting an excitation pattern containing identification data before the vehicle fully stops. The power reception device pre-charges its capacitor during this preliminary phase, so that when pairing is confirmed, charging can start immediately without waiting for capacitor charging, thus resolving the time delay while maintaining reliable pairing through identification data matching
2Reliability
If the vehicle enters and stops in the parking space for pairing, then accurate pairing can be achieved, but charging initiation is delayed
Solution Approach 1:
The system performs preliminary detection and pre-charging actions while the vehicle is still approaching or just entering the parking space, rather than waiting for the vehicle to come to a complete stop. This preliminary action maintains pairing accuracy through identification data verification while significantly improving charging efficiency by eliminating the waiting time after stopping
Solution Approach 2:
The power reception device skips the traditional sequential process of stopping first then pairing. Instead, it rushes through the pairing process during the approach phase by detecting identification data in the excitation pattern and pre-charging the capacitor simultaneously, then immediately initiates charging upon confirmation, thus improving productivity without sacrificing pairing reliability
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 allows for quick pairing and charging by pre-charging the capacitor and matching identification data, reducing the time required for the vehicle to start charging after entering the parking space.
Implementation Method 1
a power transmission coil configured to transmit power, a power reception coil configured to receive power transmitted from the power transmission coil
Data Source
AI summary
When a vehicle approaches a parking space, a ground controller sets a power transmission coil to first excitation in which the power transmission coil is excited in an excitation pattern containing identification data. A vehicle controller pre-charges a capacitor connected to a power reception coil after the vehicle approaches the parking space. Further, the vehicle controller acquires the identification data when the power transmission coil is in the first excitation, and transmits the acquired identification data to the ground unit. The ground controller pairs a power transmission device and a power reception device with each other if the identification data contained in the excitation pattern and the identification data acquired by the vehicle controller match each other.