EV Charging Station Power Conversion and Switch Matrix
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Solution Overview
Problem
The rapid growth in electric vehicle usage has outpaced the capacity of existing distribution substations, which lack integrated charging facilities, and conventional charging stations are inadequate in meeting diverse charging demands while ensuring safety.
Innovation Solution
An intelligent electric-vehicle charging station is designed with a comprehensive view of regional power distribution and charging capacity, featuring multiple charging strategies and active safety protection, incorporating power conversion units, rectification modules, a switch matrix, and a power controller to dynamically allocate power and ensure safe charging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional charging stations are used, then charging facilities are provided, but they cannot meet diverse charging demands and lack safety protection
Solution Approach 1:
The charging station employs dynamic charging strategies that can adapt to different charging scenarios and vehicle requirements. The system includes multiple charging modes (e.g., constant current, constant voltage, tapered charging) that can be dynamically selected based on battery state, grid conditions, and user needs, thereby improving adaptability while maintaining safety through real-time monitoring and control adjustments.
Solution Approach 2:
The charging station incorporates comprehensive feedback mechanisms including real-time monitoring of battery voltage, current, temperature, and charging power. The system uses feedback from these sensors to dynamically adjust charging parameters, select appropriate charging strategies, and trigger safety protection measures when abnormal conditions are detected, thus enhancing both adaptability and reliability.
2Power
If distribution substation capacity is increased to meet charging demand, then more charging power is available, but land acquisition becomes difficult and construction costs increase
Solution Approach 1:
The patent integrates power transformation, distribution, and charging functions into a unified charging station system. By merging the distribution substation's power transformation capabilities with charging facilities, the system achieves high charging power output without requiring separate large-scale land areas for power generation and charging infrastructure, thus resolving the contradiction between power capacity and land area.
Solution Approach 2:
The charging station is designed as a multi-functional system that can simultaneously serve multiple purposes: power distribution to multiple charging piles, energy storage, grid interaction, and vehicle-to-grid services. This universality allows the system to provide high charging power capacity while efficiently utilizing available land area through shared infrastructure and multiple functional outputs.
3Power
If multiple rectification modules are used to increase charging capacity, then charging power increases, but system complexity increases
Solution Approach 1:
The charging station employs multiple independent rectification modules that can be segmented and configured in series or parallel connections. Each module operates independently with its own control system, allowing the overall system to achieve high charging power through modular assembly while keeping individual module complexity manageable. The segmentation also facilitates easier maintenance and fault isolation.
Solution Approach 2:
The system introduces a central power management controller that acts as an intermediary between multiple rectification modules and the charging terminals. This mediator coordinates power distribution, manages module switching, and harmonizes control signals, thereby reducing the complexity burden on individual modules while achieving high overall system power capacity through coordinated operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively meets varying charging demands and ensures active safety protection during charging, optimizing land use and power distribution, thereby addressing the capacity shortfall and safety concerns in existing systems.
Implementation Method 1
a plurality of rectification modules, a switch matrix and a power controller. The alternating-current power distribution module is configured to supply power to a respective power conversion unit and the at least one charging terminal
Data Source
AI summary
An intelligent electric-vehicle charging station is provided. The charging station includes at least one charger. Each charger includes at least one power conversion unit and at least one charging terminal. Each power conversion unit includes an alternating-current power distribution module, a plurality of rectification modules, a switch matrix and a power controller. The alternating-current power distribution module supplies power to each power conversion unit and the at least one charging terminal. The rectification modules are divided into a plurality of groups of modules. The plurality of groups of modules is controlled, through the switch matrix, to be connected to a plurality of direct-current output circuits. Each direct-current output circuit is connected to one charging terminal. The switch matrix switches each group of modules in the plurality of direct-current output circuits according to a control instruction of the power controller.