EV Charging Power Control Using Energy Storage During Peak Load
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Solution Overview
Problem
The existing charging systems for electric vehicles increase the burden on the power grid during peak hours of residential electricity consumption, leading to shortened service life of charging piles and degraded user experience due to frequent on-off cycles and prolonged charging times.
Innovation Solution
A charging control method and system that utilize an energy storage device to supply power during peak hours, reducing the grid burden and optimizing charging times by comparing campus electricity consumption loads with predefined thresholds to manage power distribution between the rectification device and the energy storage system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the charging pile power control unit turns off the charging pile during peak hours, then the burden on the power grid is reduced, but the service life of the charging pile is shortened due to frequent on-off cycles
Solution Approach 1:
The energy storage device performs preliminary charging during off-peak hours when power demand is low, storing energy in advance. During peak hours, this pre-stored energy is discharged to meet charging demands, avoiding frequent on-off cycles of the charging pile and extending its service life while reducing grid burden.
Solution Approach 2:
The energy storage device acts as an intermediary between the power grid and the charging pile. It buffers the power fluctuations by charging from the grid during low-demand periods and supplying power during high-demand periods, thereby protecting the charging pile from frequent operational changes and reducing the impact on the power grid.
2Power
If the output power of the charging pile is reduced during peak hours, then the burden on the power grid is reduced, but the charging time is prolonged and user experience is degraded
Solution Approach 1:
The energy storage device charges during off-peak hours and stores energy in advance. During peak hours, it discharges to supplement the charging pile's output, maintaining high charging power for users while reducing the burden on the power grid.
Solution Approach 2:
The system dynamically adjusts the power contribution from the energy storage device based on real-time grid conditions and charging demands. During peak hours, the energy storage device increases its power output to compensate for reduced grid supply, ensuring that users experience no significant increase in charging time.
3Device complexity
If the charging system operates without energy storage during peak hours, then the device complexity is low, but the impact on the power grid is increased
Solution Approach 1:
The energy storage device charges during off-peak hours when grid demand is low, storing energy that will be needed during peak hours. This preliminary energy storage action allows the system to reduce its draw from the power grid during peak demand periods, thereby reducing the harmful impact on the grid while maintaining a relatively simple system architecture.
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 the impact of electric vehicle charging on the power grid during peak hours, extends the service life of charging infrastructure, and improves user experience by efficiently managing power supply and storage.
Implementation Method 1
an energy storage device to supply power during peak hours
Data Source
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AI summary
This application provides a charging control method, a charging system, and a related device, and relates to the field of electric vehicle technologies, to reduce impact of charging of an electric vehicle on a power grid, and improve charging experience of a user. The method includes: A charger detects that a first vehicle is connected to a first charging pile, and sends first information to a rectification device, where the first information is used to indicate that the first charging pile is to charge the first vehicle, and the first charging pile is any one of the plurality of charging piles; the charger receives second information from the rectification device, where the second information is used to indicate that a energy storage device is to supply power to the charger, the second information is sent by the rectification device when electricity consumption load of a campus is greater than a first load threshold, and the electricity consumption load of the campus is electricity consumption load of a campus in which the rectification device and the charger are located; and the charger receives electric energy provided by the energy storage device, and controls the first charging pile to charge the first vehicle.