Contactless Power Supply Device Efficiency-Based Fee Control
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Solution Overview
Problem
The existing power supply systems for electric vehicles face nonuniformity in charging costs due to fluctuations in charging efficiency caused by aging degradation of devices and mismatch issues during contactless charging, leading to unreasonable billing for users.
Innovation Solution
A power supply device and method that includes a control system to assess the power reception efficiency of vehicles, determining a corresponding fee range based on multiple efficiency ranges and fees, using resonance technology for efficient power transfer with a coupling coefficient of 0.1 or smaller, and informing users of the calculated fee for approval before initiating or stopping power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a uniform unit price is set for consumed power, then billing simplicity is improved, but charging cost nonuniformity increases due to fluctuation in charging efficiency
Solution Approach 1:
The patent changes the pricing parameter from a uniform unit price to a variable price structure that incorporates power reception efficiency measurements. By introducing efficiency-based pricing tiers or adjustments, the system maintains billing simplicity while accounting for actual charging performance variations caused by aging degradation and contactless charging mismatches.
Solution Approach 2:
The patent implements a feedback mechanism where power reception efficiency is measured and used to adjust billing. The control device obtains efficiency information and determines fees based on this feedback, creating a closed-loop system that resolves the contradiction between simple uniform pricing and fair variable pricing based on actual charging performance.
2Speed
If contactless charging is used to reduce charging time, then charging speed is improved, but charging efficiency fluctuation increases due to mismatch and environmental factors
Solution Approach 1:
The patent utilizes resonance technology where the power transmission section and power reception section are configured to vibrate at matching frequencies. By operating at resonant frequencies, the system achieves efficient contactless power transfer while minimizing efficiency fluctuations caused by mismatch and environmental interference.
Solution Approach 2:
The patent dynamically adjusts operating parameters such as frequency and coupling coefficient to maintain optimal charging efficiency. By monitoring and adjusting these parameters in real-time, the system preserves the speed benefits of contactless charging while compensating for efficiency fluctuations due to environmental factors and component aging.
3Device complexity
If power supply is performed without considering power reception efficiency, then system complexity is reduced, but fee fairness deteriorates
Solution Approach 1:
The patent introduces a feedback-based pricing mechanism where the control device obtains power reception efficiency information and determines fees accordingly. This feedback loop adds minimal complexity to the system while significantly improving fee fairness by ensuring users pay based on actual power received rather than just power supplied.
Solution Approach 2:
The system performs self-assessment of power reception efficiency through built-in measurement capabilities. The control device automatically obtains efficiency data and calculates appropriate fees without requiring external intervention, maintaining operational simplicity while achieving fair pricing through automated efficiency-based adjustments.
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 reduces nonuniformity in user fees by accurately accounting for power reception efficiency, aging degradation, and environmental factors, providing a fair and transparent charging cost to users.
Implementation Method 1
The power transmission section more preferably transmits the power to the power reception section through either one of a magnetic field that is formed between the power reception section of the vehicle and the power transmission section and vibrates at a specified frequency and an electric field that is formed between the power reception section and the power transmission section and vibrates at a specified frequency
Implementation Method 2
A coupling coefficient between the power reception section of the vehicle and the power transmission section is more preferably 0.1 or smaller
Data Source
AI summary
A power supply device which performs power supply from an outside to a vehicle includes: a power source section for performing the power supply to the vehicle; and a control device that performs control of the power source section. The control device obtains information about power reception efficiency of the vehicle as an object of the power supply and determines a power reception efficiency range and a fee that correspond to the obtained information from a plurality of power reception efficiency ranges and plurality of fees that are set corresponding to the plurality of power reception efficiency ranges. The power supply device preferably further includes a power transmission section for receiving the power from the power source section and contactlessly performing power transmission to the vehicle.