EV Wireless Power Supply System Communication Association
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Solution Overview
Problem
Conventional power supply systems for electric vehicles fail to accurately associate the vehicle receiving power with the vehicle communicating with the power supply apparatus, leading to potential overcharging, incorrect billing, and safety issues due to the lack of consideration for multiple vehicles in the vicinity of the power supply apparatus.
Innovation Solution
The system initiates communication with the electric vehicle using a first power value to establish a connection, allowing accurate association of the powered vehicle and preventing overcharging by switching to a second power value only after successful communication setup, ensuring safety and correct billing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power supply apparatus supplies power based on request signal alone, then power supply response speed is improved, but power supply accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by first supplying power at a first power value before establishing communication, and only after successful communication setup switches to the second power value for actual charging. This preliminary power supply phase allows the system to prepare the power transfer mechanism and verify vehicle presence before committing to full power delivery, thereby ensuring both rapid response and accurate power supply to the correct vehicle.
2Productivity
If power is supplied at high power value immediately, then charging efficiency is improved, but safety deteriorates due to potential overcharging
Solution Approach 1:
The system performs preliminary communication setup at a reduced first power value before initiating high-power charging. This preliminary phase allows verification of proper vehicle positioning and communication establishment, ensuring that high power is only supplied to the correct vehicle. Only after successful communication setup does the system switch to the second power value for efficient charging, thus maintaining both safety and charging efficiency.
3Speed
If communication setup is delayed until after power supply, then power supply speed is improved, but power distribution accuracy deteriorates
Solution Approach 1:
The system performs preliminary power supply at a first power value simultaneously with or before communication setup to prepare the power transfer mechanism and verify vehicle presence. This preliminary phase enables the system to establish power connection rapidly while still allowing subsequent communication verification to ensure correct vehicle identification. The transition from first to second power value occurs only after communication confirms proper vehicle identity, thus achieving both speed and accuracy.
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 ensures accurate power distribution and billing by ensuring that only the intended vehicle is charged and billed, preventing overcharging and enhancing safety by using a lower power initial connection for communication setup.
Implementation Method 1
A power supply apparatus includes a power supply section (power supply coil) that can supply power in a non-contact manner
Implementation Method 2
A power receiving apparatus includes a power receiving section (power receiving coil) that can be supplied with power in a non-contact manner
Data Source
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Figure 3
AI summary
Provided are an electric automobile to which a power supply device supplies power, and an electricity supply system capable of accurately associating the power supply device and the electric automobile carrying out communication therewith. A power supply-side control unit (24) control such that electricity that a power supply unit (21) supplies reaches a first electricity quantity Pa before a power supply-side communications unit (23) receives a request signal from a vehicle-side communications unit (43), and controls such that electricity that the power supply unit (21) supplies reaches a second electricity quantity Pb, which is greater than the first electricity quantity Pa, after the power supply-side communications unit (23) receives the request signal from the vehicle-side communications unit (43). The vehicle-side communications unit (43) activates on the basis of the first electricity quantity Pa received from the power supply unit (21) of a power supply device (2).