Dynamic Output Power Adjustment in Charging Device Groups
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Solution Overview
Problem
The energy bottleneck in electric vehicle charging systems leads to low utilization rates during peak hours due to limited output power, resulting in idle charging piles and unsatisfied demand.
Innovation Solution
A method to dynamically adjust the output power of charging devices within a group by determining the total output power deficit and maximum reduction magnitude, selectively reducing output power of individual charging devices to accommodate new connections and optimize energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the total output power of the charging device group is increased to meet peak charging demand, then the charging speed and satisfaction of users are improved, but the energy bottleneck and system cost increase
Solution Approach 1:
The patent implements dynamic output power adjustment by continuously monitoring the total output power of the charging device group and comparing it with the rated maximum output power. When the system reaches full load, the controller dynamically reduces the output power of individual charging devices based on their charging state and user requirements, rather than maintaining a fixed high capacity configuration.
Solution Approach 2:
The system changes the operating parameters of charging devices by adjusting output power levels. The controller calculates the output power deficit and determines maximum reduction magnitudes for each charging device, then selectively reduces power output by controlling charging currents, thereby adapting to energy constraints while maintaining system functionality.
2Loss of energy
If the output power of charging devices is reduced to save energy during peak hours, then energy consumption is decreased, but the utilization rate of charging devices and user satisfaction deteriorate
Solution Approach 1:
The patent applies different power adjustment strategies to different charging devices within the group based on their individual states. The controller calculates maximum reduction magnitudes for each charging device separately, considering factors such as charging current, voltage, and user requirements. This allows some devices to operate at full power while others are reduced, optimizing both energy efficiency and utilization rate locally across the system.
Solution Approach 2:
The system implements continuous feedback by monitoring the charging state of each device, calculating output power deficits, and adjusting power allocation in real-time. The controller receives status information from charging devices, processes the data to determine optimal power distribution, and sends control signals back to adjust output powers, creating a closed-loop system that balances energy conservation with utilization optimization.
3Productivity
If the output power of individual charging devices is dynamically adjusted, then the number of vehicles that can be charged simultaneously is increased, but the system complexity and control difficulty increase
Solution Approach 1:
The patent divides the charging device group into individually controllable units, each with its own charging state parameters. The controller segments the power adjustment process by calculating maximum reduction magnitudes for each device separately based on their specific states, rather than applying a uniform adjustment to the entire group. This modular approach manages complexity by treating each device as an independent controllable element.
Solution Approach 2:
The system manages control complexity by focusing on changing key parameters (output power, charging current, voltage) rather than redesigning the entire control architecture. The controller uses parameter-based decision making, comparing total output power with rated maximum power and adjusting individual device parameters accordingly, which simplifies the control logic while achieving the desired productivity improvement.
Data Source
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AI summary
A method for adjusting an output power of a charging device, comprising the following steps: where an object to be charged is newly connected, determining whether a charging device group is in a full-load state (S110); if the charging device group is in a full-load state, determining a defected total output power and the maximum reduction magnitude of a total output power of the charging device group; and when the defected total output power is greater than or equal to the maximum reduction magnitude, reducing an output power of a charging device in use, so as to charge the newly connected object to be charged. In the method for adjusting an output power of a charging device, after an object to be charged is connected to a charging device group, if the charging device group is fully loaded, the utilization rate of a charging device can be maximized by dynamically allocating an output power, thereby solving the problem of a low utilization rate of a charging device in a peak charging hour.