Contactless Vehicle Charging Power Allocation Under Coil Misalignment
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Solution Overview
Problem
Existing power systems face challenges in optimizing the supply-demand balance for efficient power use, particularly in contactless power transmission systems involving vehicles with secondary batteries, due to positional deviations and varying power capacities.
Innovation Solution
An information processing system that communicates with multiple contactless power transmission systems to accurately determine transmittable or chargeable power based on positional deviation amounts and coupling coefficients, enabling precise power management through bidding and power order processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If contactless power transmission systems are deployed with multiple vehicles, then power supply capability is improved, but difficulty in managing supply-demand balance increases
Solution Approach 1:
The system implements feedback mechanisms where each power transmission system reports its transmittable power to the information processing device, which then determines optimal power allocation. The system continuously monitors positional deviations and adjusts power transmission accordingly, creating a closed-loop control system that automatically balances supply and demand without manual intervention.
Solution Approach 2:
The system dynamically changes operational parameters based on real-time conditions. It calculates transmittable power by considering positional deviation amounts between coils and secondary battery voltages, then adjusts power transmission levels accordingly. This parameter-based adaptive control enables efficient management of multiple power transmission systems with varying capabilities.
2Ease of operation
If positional deviation between coils is accommodated, then ease of operation is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The system applies partial power transmission when positional deviations exist, rather than attempting full power transmission. It calculates the transmittable power based on the actual positional deviation amount and secondary battery voltage, then transmits only the optimal power level. This approach maintains ease of operation while minimizing energy loss by adapting transmission levels to actual coupling conditions.
3Measurement precision
If transmittable power is calculated based on positional deviation and voltage, then power management precision is improved, but measurement and calculation complexity increases
Solution Approach 1:
The system performs preliminary measurements of positional deviation amounts and secondary battery voltages before calculating transmittable power. By acquiring these parameters in advance and using them to determine optimal power transmission levels, the system achieves precise power management while simplifying the overall calculation process through structured, sequential measurements.
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 system optimizes power supply-demand balance by accurately calculating transmittable or chargeable power, allowing efficient power use and reducing construction costs by eliminating the need for experimental data acquisition.
Implementation Method 1
contactless power transmission between a power supply device and a moving object device
Data Source
AI summary
An information processing system includes a processing device and power transmission systems. Each power transmission system includes a power supply device provided where a moving object having a secondary battery can be stopped, and a moving object device mounted on the moving object and performing contactless power transmission with the power supply device. The processing device communicates with one device of those devices. The one device acquires a positional deviation between the power supply device and the moving object device, acquires a voltage of the secondary battery, acquires transmittable power based on the acquired positional deviation and voltage from a storage storing information associating the positional deviation, the voltage of the secondary battery, and transmittable power under a condition thereof, and outputs information indicating the transmittable power to the processing device. The processing device derives total power from respective transmittable powers, and performs processing based on the total power.