Charging Sequence Control for Distributed Power Electronics
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Solution Overview
Problem
Existing charging parks with physically distributed components face challenges in simple and reliable communication for coordinated charging sequence control, particularly when components are located outside the charging unit, and must adhere to various charging standards.
Innovation Solution
A method for charging sequence control in a power electronics system that includes predetermined charging process states and a program sequence plan, enabling clear and reliable transitions between states through communication exchange between the power electronics system and the charging control system, using various communication methods like Ethernet, powerline communication, and WLAN, to ensure compatibility with different charging standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components are physically distributed in charging parks, then system flexibility and modular design are improved, but communication complexity and coordination difficulty increase
Solution Approach 1:
A central control device acts as an intermediary between distributed power electronics systems and charging units. The central controller coordinates communication exchanges, manages state transitions, and synchronizes charging sequences across multiple distributed components, thereby reducing direct communication complexity while maintaining system flexibility.
Solution Approach 2:
The charging park control system is segmented into hierarchical layers: a central control device for overall coordination and local control devices at each charging unit. This segmentation allows distributed components to operate independently while being coordinated centrally, reducing communication overhead and complexity.
2Adaptability or versatility
If multiple charging standards are supported, then system versatility is improved, but programming complexity and control difficulty increase
Solution Approach 1:
The control system is designed with universal communication protocols and standardized state machines that can handle multiple charging standards (e.g., GB/T, CCS, CHAdeMO). The same basic control architecture and communication framework support different standards through configurable parameters rather than separate programming, reducing overall complexity.
Solution Approach 2:
Different charging standards are supported by changing configurable parameters such as communication protocols, voltage/current ranges, and state transition sequences rather than through fundamentally different programming. The system adapts to various standards by adjusting parameters within the unified control framework.
3Adaptability or versatility
If power electronics system is located outside charging unit, then installation flexibility is improved, but communication reliability and control precision may deteriorate
Solution Approach 1:
The communication exchange between the central control device and power electronics system includes continuous feedback mechanisms that monitor system state, communication quality, and charging parameters. This feedback enables real-time detection and correction of communication issues, maintaining reliability despite physical separation.
Solution Approach 2:
The central control device serves as a robust intermediary that manages communication between physically separated components. It implements error handling, retransmission protocols, and state synchronization to ensure reliable communication and precise control despite the distributed architecture.
Data Source
AI summary
A method for charging sequence control of a power electronics system, in which a charging power is provided by the power electronics system, in which a charging unit, which is operated by a user and which transfers the charging power to a battery, is controlled by a charging control system. A communication exchange is carried out at least between a control device of the power electronics system and the charging control system, in which a plurality of charging process states are predetermined, in which sequences between the charging process states are stored in a program sequence plan and in which the program sequence plan is used for charging sequence control of the power electronics system. For the event of a fault the charging process states “Not ready to charge” and “Fault in charging process” are predetermined.