Wireless Power Supply System for Seamless Vehicle Pairing
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Solution Overview
Problem
Existing wireless power transmission systems for vehicles face challenges in smoothly re-pairing with power transmission devices, particularly when vehicles change parking spaces or leave the charging area, leading to inefficiencies and potential misalignment during charging.
Innovation Solution
A wireless power supply system that uses a power transmission device with a ground unit and a vehicle-mounted power reception device, employing a three-stage excitation method to pair and charge vehicles, including a first excitation for identification, a second excitation to determine position, and a third excitation for power transmission, utilizing a communication protocol to manage pairing and charging efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a power transmission device releases a locked stay and returns to standby state after vehicle charge completion, then the device can unpair the vehicle and prepare for next charging, but the device may not be ready for smooth next pairing due to state transition delays
Solution Approach 1:
The control unit starts a timer to maintain the locked stay state even after charge completion is detected. This preliminary action ensures the pairing connection remains active and stable, allowing the vehicle to leave without immediate disconnection delays. The locked state is maintained for a predetermined period before release, smoothing the transition to next pairing.
Solution Approach 2:
The timer function provides a cushioning period that prevents abrupt state transitions. By maintaining the locked stay state beyond charge completion, the system cushions against potential premature disconnection issues, ensuring stable pairing state management during vehicle departure and arrival cycles.
2Stability of the object's composition
If the power transmission device maintains locked stay state after charge completion, then pairing stability is improved, but the device cannot quickly transition to next pairing
Solution Approach 1:
The system uses periodic timer-based state management where the locked stay state is maintained for a predetermined period after charge completion. This periodic action creates a controlled transition rhythm that ensures stability during the maintenance phase while enabling predictable and smooth transitions to the next pairing cycle, balancing both stability and speed requirements.
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 solution enables seamless pairing and efficient charging by ensuring accurate vehicle positioning and power transmission, reducing waiting times and preventing false detections, while simplifying device configuration without the need for additional sensors.
Implementation Method 1
a power transmission coil configured to be excited by a current supplied from a power unit; a power reception coil configured to receive power from the power transmission coil in a non-contact manner
Data Source
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AI summary
When a vehicle approaches a parking space, a ground controller (13) sets a power transmission coil (11) to first excitation in which the power transmission coil (11) is excited in an excitation pattern containing identification data. When the power transmission coil (11) is set to the first excitation, a vehicle controller 24 acquires the identification data from the excitation pattern received by a power reception coil (21), and transmits the identification data to a power transmission device (101). Then, the ground controller (13) determines whether or not the identification data contained in the excitation pattern when setting the power transmission coil (11) to the first excitation and the identification data acquired from the excitation pattern received by the power reception coil (21) match each other. If both pieces of identification data match each other, the ground controller (13) sets the power transmission coil (11) to second excitation for determining whether or not the vehicle is present at a chargeable position in the parking space.