Contactless Charging Coil Alignment After Vehicle READY-OFF
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Solution Overview
Problem
Existing contactless charging systems fail to execute charging when the position judgment between the power transmitting and receiving coils is not completed at the time of vehicle READY-OFF.
Innovation Solution
A control device determines if the vehicle is stopped and the relative position is capable of charging after a predetermined time has elapsed from READY-OFF, allowing charging to proceed even if initial position judgment is incomplete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position judgement is required before charging starts, then charging reliability is improved, but charging may not be executed when position judgement is not completed at READY-OFF
Solution Approach 1:
The control device performs position judgement after READY-OFF is detected, rather than requiring completion before charging can start. This preliminary action approach allows the charging system to initiate the charging process while the position judgement is still being performed, ensuring that charging is not delayed by incomplete position assessment.
Solution Approach 2:
The control device continuously monitors the position judgement result and uses this feedback to determine whether to execute charging. If the position judgement is completed and confirms a chargeable position, charging is executed. This feedback mechanism ensures reliable charging execution while accommodating the time required for position assessment.
2Productivity
If position judgement is performed immediately at READY-OFF, then charging speed is improved, but charging may be missed if vehicle movement causes position change
Solution Approach 1:
The control device dynamically adjusts the timing of position judgement based on vehicle state. Instead of a fixed immediate judgement, the system performs position judgement after detecting READY-OFF and vehicle stop, adapting to the dynamic conditions of vehicle arrival and parking. This dynamic approach balances charging initiation speed with position stability.
Solution Approach 2:
The control device waits for the vehicle to come to a complete stop before performing position judgement, cushioning against position changes that would occur during vehicle movement. This prior cushioning ensures that the position judgement is performed on a stable, stationary vehicle, improving the reliability of position assessment while maintaining efficient charging initiation.
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
Ensures charging can be initiated when initial position judgment is delayed or incomplete, ensuring efficient power transfer by optimizing parking position for maximum efficiency.
Implementation Method 1
power transmitted from a power transmitting coil of a power supply facility provided outside of a vehicle in a contactless manner by a power receiving coil
Data Source
AI summary
A contactless charging system receives power transmitted from a power transmitting coil of a power supply facility provided outside of a vehicle in a contactless manner by a power receiving coil of a power receiving unit provided in the vehicle, and charges a power storage device mounted on the vehicle. The contactless charging system includes a control device configured to determine, in a case where position judgement of whether a relative position between the power transmitting coil and the power receiving coil is a position capable of charging is not completed at a time of READY-OFF, whether or not the vehicle is stopped and the relative position is the position capable of charging after a predetermined time has elapsed from the time of READY-OFF, and perform charging in a case where it is judged that the vehicle is stopped and the relative position is the position capable of charging.