EV Charging Station Power Control Under Capacity Limits
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Solution Overview
Problem
Existing electric vehicle charging stations face limitations in capacity, leading to inconvenience and reduced willingness to use electric vehicles due to waiting times and power interruptions during load adjustments, as existing power facilities are expensive to update and communication limitations cause field power trips.
Innovation Solution
A charging management system where a server dynamically adjusts power output for electric vehicle charging stations by setting target power parameters, monitoring actual output, and adjusting based on usage and power limits to prevent field power jumps, allowing for efficient charging operations within the power field's constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of electric vehicle charging stations is increased in a charging field, then the charging capacity and service level are improved, but the power output of each charging station must be reduced due to limited existing power facility capacity
Solution Approach 1:
The patent implements dynamic power allocation by continuously monitoring the charging states of multiple electric vehicles and adjusting the power output of each charging station in real-time. The server dynamically distributes available power resources based on current demand, allowing the system to support more charging stations without upgrading power facilities while preventing field power trips through adaptive load management.
Solution Approach 2:
The system changes the power parameter distribution across charging stations based on real-time monitoring data. When a charging vehicle approaches full charge, its power consumption naturally decreases, and the system reallocates this freed power capacity to other charging stations, thereby increasing the effective number of stations that can operate simultaneously within the same power facility limits.
2Quantity of substance
If load adjustment operation is performed to increase the number of charging stations, then charging capacity is improved, but communication limitations cause field power trips and interruption of charging operations
Solution Approach 1:
The patent implements a closed-loop feedback system where the server continuously monitors the charging state of each electric vehicle, the power output of each charging station, and the overall power consumption of the charging field. This real-time feedback enables the system to detect when power limits are approaching and automatically adjust power allocation to prevent field power trips, ensuring continuous and reliable charging operations.
Solution Approach 2:
The system performs preliminary power allocation adjustments before field power trips occur by monitoring power consumption trends and proactively redistributing power capacity. When detecting that a charging vehicle is approaching full charge, the system preemptively prepares for power reallocation to other stations, preventing communication limitations from causing power trips and maintaining operational reliability.
3Quantity of substance
If power output is reduced at each charging station to accommodate more vehicles, then the number of simultaneous charging operations is increased, but the electricity demand of vehicles is not constant causing inefficient power utilization
Solution Approach 1:
The patent leverages the natural self-service characteristic of electric vehicle charging, where each vehicle's power demand automatically adjusts based on its battery state of charge. As vehicles approach full charge, their power consumption naturally decreases without external intervention. The server monitors these changes and automatically reallocates the freed power capacity to other charging stations, maximizing power utilization efficiency while supporting more simultaneous charging operations.
Solution Approach 2:
The system maintains continuous and efficient power utilization by dynamically redistributing power capacity as charging demands change. When one vehicle's power demand decreases, the system continuously reallocates that power to other vehicles that still require charging, ensuring that the power facility operates at optimal capacity throughout the charging period and avoiding wasted power capacity.
Data Source
AI summary
Charging management methods and systems for electric vehicle charging stations for use in a charging field with charging stations are provided. First, a server instructs a first charging station to perform a first charging operation for a first electric vehicle via a network, wherein the server sets a first target power parameter value corresponding to the first charging operation, and the power output from the first charging station to the first electric vehicle in the first charging operation will not exceed the first target power parameter value. The server monitors a first power output value actually output from the first charging station to the first electric vehicle during the first charging operation, and determines whether to adjust the first target power parameter value of the first charging operation according to the first power output value and the first target power parameter value.