Parked EV Power Supply Control Using Predicted Solar Generation
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Solution Overview
Problem
Vehicle management devices face challenges in setting an appropriate allowable power supply amount for parked vehicles, as increased power supply to external systems decreases the power storage ratio and next travel's electric power availability.
Innovation Solution
The vehicle management device sets an allowable power supply amount within the predicted solar cell power generation range until the next scheduled travel start time, allowing for participation in virtual power plants to optimize power usage and notify users for adjustments based on VPP participation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the allowable power supply amount for external systems is increased, then the power supply capability to external systems is improved, but the power storage ratio of the drive battery decreases and the amount of electric power for next travel decreases
Solution Approach 1:
The system performs preliminary calculation of the predicted power generation amount by the solar cell system before determining the allowable power supply amount. This advance planning allows the system to set power supply limits that will not compromise the battery's power storage ratio below the predetermined threshold, thus preventing the contradiction between current power supply and future power availability
Solution Approach 2:
The system continuously monitors the battery's power storage ratio and adjusts the allowable power supply amount based on feedback from the solar cell's predicted generation. This closed-loop control ensures that power supply decisions are dynamically optimized to maintain both external power supply capability and adequate battery charge levels for upcoming travel
2Power
If the vehicle participates in virtual power plant, then the power supply to power system is improved within renewable energy range, but the flexibility for user power supply needs is reduced
Solution Approach 1:
The system dynamically adjusts the allowable power supply amount based on the vehicle's participation status in the virtual power plant. When participating, the system optimizes for renewable energy contribution; when not participating, it expands the power supply range to meet user needs. This dynamic adaptation resolves the contradiction between grid contribution and user flexibility
Solution Approach 2:
The system changes the parameter of allowable power supply amount based on VPP participation status. By adjusting this key parameter according to operational context, the system can optimize power supply behavior for different scenarios, balancing grid support obligations with user-specific power needs
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 effectively suppresses the decrease in power storage ratio and electric power availability for the next travel while enabling efficient power supply to external systems, with incentives for using natural energy when participating in VPP and increased power supply when not.
Implementation Method 1
a solar cell system configured to generate electric power by a solar cell and supply the electric power to the power storage device
Data Source
AI summary
The vehicle management device includes a drive unit for driving, a power storage device that can supply power to the drive unit, and a solar cell system that can generate electricity from a solar cell and supply it to the power storage device, and also supplies power to the outside of the vehicle. Vehicles that can be used. While the vehicle is parked, the vehicle management device sets an allowable power supply amount for the outside of the vehicle within the range of the predicted power generation amount of the solar cell until the next scheduled start time of the vehicle.