EV Charging Schedule Control for Peak Demand Shifting
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Solution Overview
Problem
The simultaneous charging of multiple electric vehicles can overwhelm the electric grid, especially when they charge concurrently, leading to high electricity demand and potential grid overload.
Innovation Solution
An electric vehicle charging control device with an electronic dynamic charging schedule generator that determines when an electric vehicle user accesses a charging port, generates a charging schedule based on vehicle and building structure profiles, and includes a charge period and a discharge period to manage electricity usage, using an electronic communicator to update and implement the schedule.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electric vehicles are charged concurrently at a building structure, then the charging speed and user convenience are improved, but the electric grid becomes overwhelmed and electricity demand exceeds supply capacity
Solution Approach 1:
The system performs preliminary actions by scheduling charging during off-peak hours before high-demand periods occur. The controller predicts future charging needs and schedules charging sessions in advance during low-demand periods, preventing grid overload while ensuring vehicles are charged when needed.
Solution Approach 2:
The charging schedule is made dynamic and adjustable based on real-time grid conditions, vehicle needs, and user preferences. The controller can modify charging rates and timing dynamically, allowing the system to adapt to changing electricity demand and supply conditions, optimizing both grid load management and charging efficiency.
2Quantity of substance
If charging is scheduled during off-peak hours to reduce grid demand, then electricity demand is managed effectively, but the charging time duration increases
Solution Approach 1:
The system implements periodic charging schedules that alternate between charging and discharging phases. Vehicles charge during off-peak hours and discharge during peak hours, creating a periodic pattern that manages overall electricity demand while reducing total charging time requirements through multiple charge-discharge cycles.
Solution Approach 2:
The system maintains continuous useful action by enabling vehicles to both charge and discharge at different times. Rather than idle periods, vehicles continuously contribute to grid balance by discharging during peak hours after charging during off-peak hours, ensuring the charging infrastructure remains productive throughout all hours.
3Quantity of substance
If electric vehicles discharge to the building structure during high demand periods, then the strain on the electric grid is reduced, but the vehicle battery charge level decreases
Solution Approach 1:
The system uses feedback mechanisms to continuously monitor vehicle charge levels, grid demand conditions, and user preferences. Before authorizing discharge, the controller verifies that sufficient charge remains to meet the user's minimum requirements. This feedback loop ensures that discharge operations reduce grid strain without compromising the user's charging needs.
Solution Approach 2:
The system changes operational parameters by adjusting discharge rates, timing, and duration based on real-time conditions. The controller can modify discharge parameters dynamically, reducing discharge intensity when vehicle charge levels are low and increasing it when conditions are favorable, optimizing the balance between grid support and vehicle energy availability.
Data Source
AI summary
An electric vehicle charging control device includes an electronic dynamic charging schedule generator, a non-transitory computer readable medium and an electronic communicator. The electronic dynamic charging schedule generator has an electronic controller configured to determine when an electric vehicle user accesses a charging port provided at a building structure being powered by an electric source. The non-transitory computer readable medium stores vehicle profile data for the electric vehicle. The electronic communicator is configured to receive profile updates to the vehicle profile data from an electronic user interface. The electronic controller is programmed to generate a charging schedule for the electric vehicle based on the vehicle profile data. The charging schedule has a charge period in which the electric vehicle is receiving charge from the building structure and a discharge period in which the electric vehicle is providing charge to the building structure. The electronic controller controls the charging port in accordance with the charging schedule.