Battery Swapping Station Energy Dispatch for Grid Peak Demand
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Solution Overview
Problem
The utilization rate of electric energy in battery swapping stations is low, as batteries remain in charging compartments after being fully charged, awaiting swapping back to vehicles.
Innovation Solution
A method and apparatus for electric energy transmission that includes determining the resource value of electric energy based on grid load, controlling the charging and discharging of batteries in the swapping station to transmit excess energy back to the grid during peak demand, and modulating available batteries to meet demand during periods of low availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If batteries remain in charging compartments after being fully charged, then the vehicle swapping service can ensure battery availability, but the utilization rate of electric energy decreases
Solution Approach 1:
The battery swapping station enables batteries to serve dual purposes: they not only power vehicles but also store and discharge energy back to the grid during peak demand periods. The system allows batteries to automatically participate in grid peak-valley arbitrage, where charged batteries discharge to the grid when electricity prices are high, and charge from the grid when prices are low, making the battery system self-sufficient in energy management while improving overall utilization
Solution Approach 2:
The battery system is designed to perform multiple functions simultaneously: (1) providing power to vehicles during swapping operations, (2) storing excess energy during off-peak grid periods, and (3) discharging to the grid during peak demand periods. This multi-functionality transforms idle charged batteries from energy waste into valuable energy resources that can be sold back to the grid, thereby improving electric energy utilization rate while maintaining battery availability for vehicle service
2Loss of energy
If batteries are discharged to the grid during peak demand, then electric energy utilization rate improves, but battery swapping capacity may be reduced
Solution Approach 1:
The system dynamically adjusts battery allocation based on real-time grid demand and vehicle swapping requirements. During peak grid demand periods, the control system selectively discharges only those batteries that are not immediately needed for vehicle swapping, while keeping swap-ready batteries available. This dynamic management allows the system to optimize energy sales without compromising vehicle service capability
Solution Approach 2:
The system performs preliminary charging of batteries during off-peak grid periods when electricity prices are low and grid demand is low. This advance charging ensures that batteries are fully charged and ready for both vehicle swapping and potential grid discharge during peak periods. By preparing batteries in advance during low-demand periods, the system ensures sufficient swapping capacity is maintained while maximizing energy utilization opportunities during peak periods
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 solution enhances the utilization rate of electric energy in battery swapping stations by efficiently managing energy transmission between batteries and the grid, ensuring sufficient battery swapping capacity during peak periods and optimizing resource scheduling.
Implementation Method 1
a bidirectional power conversion unit electrically connected to a power grid system and a plurality of battery modules; and a monitoring module for receiving a power grid state information to determine whether the power grid system is in a peak power state. When determining that it is in the peak power state, the monitoring module controls the bidirectional power conversion unit to receive the battery voltage from each of the battery modules, convert the battery voltage into a playback voltage, and output the playback voltage to the grid system
Data Source
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AI summary
The embodiments of the present application provide a method, apparatus, device, and medium for electric energy transmission. The method includes: determining a resource value of a unit of electric energy of a grid at a target time; under a condition that the resource value is greater than or equal to a first resource threshold, determining a number of available batteries in a battery swapping station and an ordered number of batteries in the battery swapping station within a target time period; and under a condition that the number of available batteries is greater than a number of reserved batteries, controlling a charging and discharging module to transmit electric energy of a first battery in the battery swapping station to the grid. According to the embodiments of the present application, the electric energy of the battery in the battery swapping station can be reasonably utilized.