Modular EV Charging Architecture With Decoupled Rectifiers
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Solution Overview
Problem
Existing electric vehicle (EV) chargers are expensive to upgrade and maintain, and their installations are not scalable, leading to issues with accessibility and reliability, especially as the EV market expands.
Innovation Solution
A decoupled AC/DC rectifier and DC/DC converter system with a DC distributor and site controller, allowing for modular expansion and power management, enabling flexible power distribution and redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If EV chargers are designed with integrated AC/DC rectifiers and DC/DC converters, then the system structure is simpler, but the system is not upgradeable or expandable when technology advances or demand increases
Solution Approach 1:
The EV charger is divided into separate functional modules: AC/DC rectifiers, DC distributors, and DC/DC converters. Each module can be independently selected, upgraded, or replaced without affecting other parts of the system, enabling technological updates while maintaining overall system functionality.
Solution Approach 2:
The system allows dynamic configuration where the number and power capacity of AC/DC rectifiers can be adjusted independently from DC/DC converters. This enables the system to adapt to changing power demands and technological advancements by adding or removing modules as needed.
2Adaptability or versatility
If EV chargers are designed to be modular and expandable, then the system can be upgraded and scaled, but the internal circuitry and cabling become more complex
Solution Approach 1:
DC distributors serve as intermediary components that simplify connections between multiple AC/DC rectifiers and DC/DC converters. The distributors use standardized DC connection points that reduce the complexity of internal cabling and circuitry while enabling flexible system expansion.
3Power
If more AC/DC rectifiers are installed to meet increasing EV charging demand, then the power capacity increases, but the cost of installation and maintenance increases disproportionately
Solution Approach 1:
AC/DC rectifiers are designed as universal modules that can serve multiple functions and be deployed in various configurations. A single rectifier can serve multiple DC/DC converters, and modules can be shared across different charging locations, reducing the total number of units needed and lowering installation and maintenance costs.
4Adaptability or versatility
If the ratio of AC/DC rectifiers to DC/DC converters is fixed, then the system design is simpler, but the system cannot adapt to varying power demands and technological changes
Solution Approach 1:
The system enables dynamic adjustment of the rectifier-to-converter ratio by allowing independent addition or removal of AC/DC rectifier modules. The DC distributors automatically manage power distribution regardless of the changing configuration, maintaining system simplicity while providing operational flexibility.
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 system supports serviceability, upgradability, and expandability, reducing costs and ensuring reliable access to charging stations as the EV market grows, with features like AC/DC rectifier redundancy and DC/DC converter oversubscription.
Implementation Method 1
the system further comprises a solar photovoltaic system connected to the DC distributor and/or the one or more batteries
Implementation Method 2
one or more alternating current (AC)/DC rectifiers connected to the DC distributor
Implementation Method 3
an electric vehicle charger having one or more DC/DC converters connected to the DC distributor
Data Source
AI summary
An electric vehicle charging system comprising a Direct Current (DC) distributor, a site controller, one or more alternating current (AC)/DC rectifiers connected to the DC distributor and the site controller, and an electric vehicle charger having one or more DC/DC converters connected to the DC distributor and a charge controller in communication with the site controller and each of the one or more DC/DC converters. The one or more AC/DC rectifiers are decoupled from the one or more DC/DC converters.