Vehicle Power Source Switching for Dynamic Road Charging
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Solution Overview
Problem
When the allowable charged electric power of a vehicle's battery is small, it is not possible to supply the electric power transmitted by a power receiving apparatus to the battery, necessitating a suitable selection of the power source for the vehicle's motor based on its running environment.
Innovation Solution
A vehicle equipped with a power receiving apparatus and a battery, where a control device selects the source of electric power to the motor from the battery or the power receiving apparatus based on whether the vehicle is in a power supply area, considering factors like power consumption and potential power supply issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric power is supplied from the power receiving apparatus to the battery, then the battery can be charged during vehicle operation, but the battery's allowable charged electric power is limited and cannot accept all transmitted power
Solution Approach 1:
The system dynamically switches between two power supply modes: using the power receiving apparatus as the power source when in a power supply area, and using the battery as the power source when outside the power supply area. This dynamic adaptation allows the vehicle to fully utilize transmitted electric power by bypassing the battery's charging limitations and directly supplying power to the motor when available.
2Adaptability or versatility
If the vehicle has two power sources (battery and power receiving apparatus), then power supply flexibility is improved, but the complexity of selecting and managing power sources increases
Solution Approach 1:
The control device determines whether the vehicle is located in a power supply area and automatically selects the appropriate power source based on this condition. When in the power supply area, it selects the power receiving apparatus; when outside, it selects the battery. This feedback-based automatic control simplifies power source management while maintaining flexibility.
3Productivity
If electric power is directly supplied from the power receiving apparatus to the motor, then power supply efficiency is improved, but reliability decreases when power transmission is disrupted
Solution Approach 1:
The system changes the power supply configuration parameter based on location: when in the power supply area, it configures direct power supply from the power receiving apparatus to the motor for high efficiency; when outside the power supply area, it switches to battery power supply for reliable operation. This parameter change allows the system to optimize for efficiency when possible and for reliability when necessary.
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
Enables suitable selection of the power source to the motor, ensuring efficient power supply to the vehicle, even when the battery's charging capacity is limited or power transmission is disrupted.
Implementation Method 1
a power receiving apparatus provided with a power receiving coil for receiving electric power from a power transmitting coil provided at a road
Data Source
AI summary
A vehicle is provided with a battery configured to store electric power; a power receiving apparatus provided with a power receiving coil for receiving electric power from a power transmitting coil provided at a road; a motor configured to output drive power of the vehicle; an electric power supply circuit configured to supply electric power from at least one of the battery and the power receiving apparatus to the motor; and a control device configured to control the supply of electric power to the motor. The control device is further configured to select a source of supply of electric power to the motor from the battery and the power receiving apparatus in accordance with whether the vehicle is running in a power supply area at which the power transmitting coil is provided.