EV Charging Control System for Scalable Load Management
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Solution Overview
Problem
Current systems lack a comprehensive method for real-time charging schedule control of a large number of EVs that can adjust to demand changes, ensure full charging at departure, and operate within limited calculation resources and communication capacity, while ensuring scalability.
Innovation Solution
A charging control system with a distribution device, interface devices, and a charging controller that manages charging based on connection and disconnection times to each vehicle's battery, allowing for dynamic adjustment of charging schedules in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If real-time charging schedule control is implemented for a large number of EVs, then power system adjustability is improved, but calculation resource load increases
Solution Approach 1:
The charging control system is divided into multiple interface devices that can independently manage charging for individual EVs or groups of EVs. Each interface device handles local charging control tasks, segmenting the overall calculation load across multiple distributed units rather than concentrating all computation in a single central controller. This segmentation reduces the calculation resource load on any single device while maintaining comprehensive control over the power system.
2Stability of the object's composition
If charging schedules are dynamically adjusted in real-time, then power supply-demand balance is stabilized, but communication capacity requirements increase
Solution Approach 1:
The system extracts and utilizes only the essential information needed for charging control from each EV, specifically the connection time and disconnection time. By focusing on these two critical parameters and ignoring unnecessary data, the communication capacity requirements are reduced while still enabling effective real-time charging schedule adjustment and power supply-demand balance stabilization.
3Ease of operation
If charging control is based on connection and disconnection times, then EV owner flexibility is maintained, but charging schedule complexity increases
Solution Approach 1:
The charging control system performs preliminary actions by automatically generating charging schedules based on the connection and disconnection times provided by EV owners. The interface devices pre-calculate optimal charging schedules that satisfy the owners' flexibility requirements while maintaining power system stability, thereby reducing the apparent complexity for users who only need to specify their time windows rather than detailed charging parameters.
Data Source
AI summary
A charging controller (300) controls charging of a battery by an interface device (400-1 to 400-m) on the basis of distribution system connection time when the interface device (400-1 to 400-m) and a battery mounted on EV (500-1 to 500-n) are connected to each other and on the basis of distribution system disconnection time when they are disconnected in each of the interface devices (400-1 to 400-m).