Modular EV Fast Charging Storage for Household Power Limits
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Solution Overview
Problem
Conventional electric vehicle chargers in residential or commercial settings are limited to slow charging speeds due to household circuit limitations, and home energy storage systems do not provide additional value during non-outage periods, as they cannot deliver DC fast charging.
Innovation Solution
A distributed power transfer and storage system that uses modular storage/conversion modules (SCMs) to deliver direct current fast charging by bypassing household circuitry, allowing for scalable, customizable, and safer energy storage and transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional household circuitry is used for EV charging, then the system is simple and compatible with existing infrastructure, but charging speed is limited to low levels
Solution Approach 1:
The system is divided into modular Storage/Conversion Modules (SCMs) that can be independently configured and scaled. Each SCM contains power converters and transformers that work together to convert AC power to DC fast charging power, allowing the system to be segmented into manageable units that can be distributed throughout the home or building infrastructure.
Solution Approach 2:
The system bypasses the traditional single-point charging approach by creating a distributed three-dimensional network of SCMs integrated into the home's electrical infrastructure. This allows DC fast charging capability to be delivered from multiple locations and pathways within the electrical system, fundamentally changing how power is delivered to the EV.
2Power
If home energy storage systems store power for backup purposes, then energy security is improved, but the stored power cannot be effectively utilized for high-power DC fast charging
Solution Approach 1:
The SCMs are designed to perform multiple functions: they can store energy, convert AC to DC, deliver DC fast charging power, and provide backup power. This multi-functionality allows the same infrastructure to serve both energy security needs and high-power charging needs without requiring separate systems.
Solution Approach 2:
The system dynamically adapts its power delivery characteristics based on real-time conditions. The SCMs can adjust their operation to deliver high-power DC fast charging when an EV is connected, while maintaining backup power capabilities. The system can also dynamically route power from different sources (grid, storage, solar) based on availability and demand.
3Loss of time
If DC fast charging is implemented directly at home, then charging time is reduced, but household circuitry and existing systems experience excessive stress
Solution Approach 1:
The SCMs act as intermediary devices between the home's AC electrical infrastructure and the EV's DC battery system. They include power converters and transformers that mediate the power conversion process, converting AC power to the high-voltage DC required for fast charging while isolating and protecting the existing household circuitry from the high stress of direct DC fast charging loads.
Solution Approach 2:
The system incorporates protective circuitry and power management mechanisms within the SCMs that cushion and absorb stress before it reaches the household circuitry. Power converters and transformers are positioned to preemptively manage electrical stress, preventing damage to existing infrastructure while enabling DC fast charging capability.
4Adaptability or versatility
If a distributed modular system is deployed, then power delivery flexibility is improved, but device complexity and installation requirements increase
Solution Approach 1:
The system is divided into standardized, modular SCMs that can be manufactured independently and installed in various configurations. Each module contains integrated power converters, transformers, and control systems, making them self-contained units that simplify both manufacturing and installation while maintaining system 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
Enables rapid DC power transfer to electric vehicles, providing additional uses for stored energy and enhancing system flexibility and safety through modular architecture and software optimization.
Implementation Method 1
a first transformer coupled to the first power converter
Implementation Method 2
one or more first batteries coupled to the first transformer and the first power converter
Data Source
AI summary
A distributed power transfer and storage system may receive first power from a first power source following a country specific common voltage. The distributed power transfer and storage system may store, in one or more energy storage media, the first power from the first power source. The distributed power transfer and storage system may provide, using the first power stored in the one or more energy storage media, direct current fast charging power to a battery that is included in an electric vehicle.