Shared DC Bus Charging for Concurrent EV Voltage Matching
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Solution Overview
Problem
The existing electric vehicle charging infrastructure faces challenges due to the limited charging capacity of individual dispensers, which requires large and expensive power converters, making the systems complex, costly, and difficult to build.
Innovation Solution
A system and method for electric vehicle charging that utilizes a shared DC power converter and a DC Bus with multiple voltage lines, controlled by a charging system controller, allowing multiple electric vehicles to be charged simultaneously by adjusting the voltage of the DC Bus to match the target inlet voltage of each vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If large power converters are provided for each dispenser to provide high current and regulate voltage, then charging capacity is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple power conversion functions into a single shared DC power converter that serves multiple charging dispensers. This centralized approach eliminates the need for separate large power converters at each dispenser, reducing overall system complexity while maintaining high charging capacity through the shared resource.
Solution Approach 2:
The shared DC power converter is designed to serve multiple charging dispensers simultaneously, making it a universal component that performs the power conversion function for the entire charging station rather than requiring dedicated converters for each dispenser.
2Power
If large power converters are provided for each dispenser to provide high current and regulate voltage, then charging capacity is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple power conversion functions into a single shared DC power converter that serves multiple charging dispensers. This centralized approach eliminates the need for separate large power converters at each dispenser, reducing overall system complexity while maintaining high charging capacity through the shared resource.
3Adaptability or versatility
If individual power conversion systems are used for each dispenser, then charging independence is improved, but system complexity increases
Solution Approach 1:
The patent segments the charging station into multiple independent charging dispensers that share a common power conversion system. Each dispenser can independently connect to and charge vehicles, but they all draw power from and communicate with the centralized DC power converter through the DC bus, reducing complexity while maintaining operational independence.
Solution Approach 2:
The DC bus acts as an intermediary between the shared DC power converter and multiple charging dispensers. It enables power and control signal transmission between the centralized converter and distributed dispensers, allowing independent operation of each dispenser while sharing the power conversion resource.
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
This approach enables efficient and cost-effective charging of multiple electric vehicles by minimizing the need for individual power conversion systems, reducing complexity and costs, while ensuring safe and compatible charging parameters for each vehicle.
Implementation Method 1
A DC power converter is included
Data Source
AI summary
An electric vehicle charging system includes a charging system controller having a processor and computer-readable memory, and a DC power converter. A DC Bus has at least a positive and a negative set of voltage lines. At least two charging dispensers are in electrical communication with the DC power converter along the DC Bus. Each of the at least two charging dispensers is electrically connectable to an electric vehicle. The charging system controller is configured to: acquire a target inlet voltage requested by a first chargeable electric vehicle; acquire a target inlet voltage requested by at least one subsequent chargeable electric vehicle; control a voltage of the DC Bus to correspond to the target inlet voltage requested by at least one chargeable electric vehicle; and connect a chargeable electric vehicle having a target inlet voltage corresponding to the voltage of the DC Bus, thereby enabling charging or discharging.