Mobile EV Charging Station with Bidirectional DC Fast Charging
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Solution Overview
Problem
There is a lack of direct-current fast charging (DCFC) stations in many cities, which are expensive and require significant infrastructure, limiting the adoption of electric vehicles due to range anxiety, and existing mobile charging systems either lack DC fast charging capability or are inflexible in recharging methods.
Innovation Solution
A mobile charging station equipped with an energy accumulation group, converter unit, and charge controllers that can simulate an electric vehicle to charge at external points, allowing bidirectional energy flow and heat management, enabling fast and flexible charging of electric vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If DC fast charging stations are installed, then charging speed is improved, but infrastructure cost and complexity increase
Solution Approach 1:
The system divides the charging infrastructure into mobile charging units that can be deployed independently rather than requiring large fixed stations. Each mobile unit contains its own energy storage and charging equipment, allowing fast charging capability to be segmented and distributed across multiple portable units.
Solution Approach 2:
The mobile charging unit acts as an intermediary between the electrical grid and electric vehicles. It includes a mobile energy storage system that receives charge from external sources and transfers charge to EVs, decoupling the need for direct grid connection at each charging location from the ability to provide fast charging.
2Reliability
If fixed charging points are installed, then charging reliability is improved, but adaptability to different locations deteriorates
Solution Approach 1:
The charging infrastructure transitions from static fixed points to dynamic mobile units that can move between locations. The mobile charging units can be transported to where vehicles need charging, providing reliable charging service while adapting to different locations as needed.
Solution Approach 2:
The mobile charging units are designed to serve multiple locations and functions. They can charge different types of electric vehicles, can be deployed in various settings (street corners, parking areas, residential zones), and can operate independently of fixed infrastructure.
3Adaptability or versatility
If mobile charging station simulates EV to charge at external points, then flexibility is improved, but communication complexity increases
Solution Approach 1:
The mobile charging unit creates a virtual copy of an electric vehicle through its controller, which communicates with external charging points using the same protocols and data structures that real EVs use. This allows the charging unit to authenticate and charge at public charging points without requiring special infrastructure.
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 mobile charging station provides fast and flexible charging solutions, reducing range anxiety and infrastructure costs by allowing DCFC and eliminating the need for fixed charging points, while being transportable and adaptable to various charging environments.
Implementation Method 1
a converter unit, connected to a direct-current (DC) bus and said accumulators, comprising one or more DC-DC converters, for converting a source of direct current from a first voltage level to a second voltage level
Implementation Method 2
an energy accumulation group, comprising accumulators for storing energy
Data Source
AI summary
The present invention discloses a mobile charging station configured to fast-charge electric vehicles (EVs) with limited access to public or private charging points and comprises an energy accumulation group, a converter unit, charge controllers and an interface. The present invention pertains to the technical field of charging stations. In a second aspect, the present invention relates to a method for charging EVs in a mobile manner.