Compact EV Charging Substation with Modular Power Distribution
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Solution Overview
Problem
Current electrical equipment in buildings is not suitable for retrofitting to support multiple electric vehicle charging stations, as it cannot provide the necessary voltage and current, especially when multiple stations are required, leading to a need for specialized equipment that can work within existing infrastructure.
Innovation Solution
A compact electric substation with a transformer that steps down utility power to a usable voltage for electric vehicles, along with a distribution component and controller that manages power distribution to multiple charging stations based on user input, including timing and payment processing through a user terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current electrical equipment in buildings is used for retrofitting charging stations, then installation is simple, but the equipment cannot provide the necessary voltage and current for multiple charging stations
Solution Approach 1:
The system divides the electrical infrastructure into modular components: existing building electrical systems remain in place, while compact substations are added as separate, self-contained units. Each substation handles its own voltage transformation and distribution to specific charging stations, allowing the system to scale by adding independent modules rather than replacing entire systems.
Solution Approach 2:
The compact substation acts as an intermediary device between the existing building electrical infrastructure and the EV charging stations. It receives high-voltage power from the building's electrical system, transforms it to appropriate charging voltages, and distributes it to multiple charging stations, thereby enabling compatibility between legacy infrastructure and modern charging requirements.
2Adaptability or versatility
If a compact substation with transformer is installed to step down voltage, then suitable voltage for EV charging is achieved, but device complexity increases
Solution Approach 1:
The compact substation integrates multiple functions into a single compact unit: the transformer for voltage transformation, the distribution component for power routing, and the controller for management are combined in one location. This consolidation reduces the need for separate equipment rooms or distributed components, simplifying installation while maintaining full voltage transformation capability.
Solution Approach 2:
The compact substation is designed as a multi-functional unit that can serve multiple charging stations simultaneously. The distribution component with multiple contactors allows a single substation to handle power delivery to several different charging points, making the device universally applicable to various charging configurations without requiring additional transformation equipment.
3Productivity
If distribution component with multiple contactors is used to power multiple charging stations, then power distribution capability is improved, but control complexity increases
Solution Approach 1:
The controller receives feedback signals from each charging station regarding their operational status, power requirements, and charging progress. Based on this feedback, the controller automatically adjusts contactor activation and power distribution levels, enabling intelligent load management across multiple stations without requiring manual intervention or complex external control systems.
Solution Approach 2:
The controller autonomously manages the distribution of power to multiple charging stations based on programmed logic and received feedback. It automatically activates or deactivates contactors, monitors power flow, and adjusts distribution as needed, making the system self-managing and reducing the operational burden on users while supporting multiple simultaneous charging operations.
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
Enables efficient and controlled power delivery to electric vehicle charging stations, accommodating multiple stations within existing electrical infrastructure, ensuring reliable and user-managed charging operations while supporting payment processing.
Implementation Method 1
a transformer receiving power from a utility power source, the transformer being for converting power from said power source from a higher voltage to a lower voltage
Data Source
AI summary
Systems and methods relating to a compact electric substation for use with charging stations for electric vehicles. A compact substation is equipped with a suitable transformer that steps down the voltage from a mains line from a power utility company to a voltage usable for electric vehicle (EV) charging. The substation is equipped with a distribution component that distributes the lower voltage power to a number of charging stations by way of contactors controlled by a controller. The controller activates/deactivates the relevant contactor to feed power to the relevant charging station based on a user's input at a user terminal. Suitable software in the user terminal ensures that suitable signals are sent to the controller only after the user has set a time frame for how long to charge an EV. The user terminal may be a point of sale terminal that also accepts user payment for the EV recharge.