Wireless EV Charging Control via User Confirmation
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Solution Overview
Problem
Existing non-contact electric power transmission systems for electric vehicles face inefficiencies due to varying user intentions and inaccuracies in registration between power transmission and reception devices, leading to suboptimal charging efficiency and user inconvenience in public spaces.
Innovation Solution
An electric power transmission device with a communication system and control unit that authenticates vehicles and adjusts power transmission based on user instructions, using resonant magnetic or electric fields to optimize power transfer efficiency and user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-contact electric power transmission is implemented in public spaces with shared devices, then accessibility and convenience for users are improved, but adaptation to various vehicle types and states becomes more complex
Solution Approach 1:
The control device is designed to universally handle multiple vehicle types and states by detecting various vehicle conditions (presence of driver/passenger, load status, parking position) and automatically adapting power transmission parameters. This multi-functional capability allows a single shared charging device to serve diverse electric vehicles without requiring user intervention for configuration.
2Productivity
If electric power transmission starts without user instruction, then charging efficiency is improved, but user intention may not be reflected leading to unwanted power transmission
Solution Approach 1:
The system implements feedback by notifying the user of the detected vehicle state and estimated power reception status before initiating power transmission. The control device waits for user confirmation or instruction, creating a closed-loop system that ensures power transmission aligns with user intention while still providing efficient automated detection and preparation.
Solution Approach 2:
The control device performs preliminary detection of vehicle state and estimation of power reception status before actual power transmission begins. This preliminary action prepares the system for efficient charging while giving the user advance notice and opportunity to confirm or modify transmission parameters.
3Measurement precision
If weak electric power is transmitted for efficiency detection, then positioning accuracy is improved, but charging time increases due to additional detection steps
Solution Approach 1:
The system transmits only weak electric power sufficient for efficiency detection rather than full charging power. This partial action provides adequate measurement precision for positioning and efficiency assessment while minimizing the time penalty, as the weak power transmission is brief and followed by optimized full-power charging.
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
Facilitates efficient and user-intention-driven electric power transmission and reception by ensuring accurate registration and optimal power transfer, minimizing inefficiencies and user effort in public charging environments.
Implementation Method 1
using resonant magnetic or electric fields to optimize power transfer efficiency
Implementation Method 2
a communication portion for communicating with the vehicle
Data Source
AI summary
An electric power transmission device includes an electric power transmission portion, a first communication portion, and a first control device controlling the electric power transmission portion and the first communication portion. A vehicle includes an electric power reception portion, a second communication portion, and a second control device controlling the electric power reception portion and the second communication portion. The first control device and the second control device determine whether or not to cause the electric power transmission portion to transmit electric power based on an instruction from a user which is provided after the user is notified of a status of electric power reception in the electric power reception portion or an estimated status of electric power reception in the electric power reception portion.