Auto-Resettable EV Charging Station Seismic Power Isolation
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Solution Overview
Problem
Existing electric vehicle charging stations (EVCS) in seismic zones lack the capability to safely respond to seismic events, such as earthquakes, and require reliable restoration of operational functions.
Innovation Solution
A retrofit kit or assembly that includes seismic detection hardware and functionality, comprising an accelerometer, programmable logic controller, automatic transfer switch, and alternate power source, which can be installed in existing EVCS to disconnect from the main power source during seismic events and switch to an alternate power source for continued operation and system checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If EVCS stations are installed in seismic zones to meet demand, then accessibility and service coverage are improved, but safety and reliability deteriorate due to lack of seismic event response capability
Solution Approach 1:
The system performs preliminary actions by installing seismic sensors and control mechanisms in advance during EVCS construction. When seismic events occur, the system automatically detects them and executes pre-programmed safety protocols including disconnecting power and activating alarm systems, eliminating the need for manual intervention and ensuring immediate safety response.
Solution Approach 2:
The patent introduces seismic sensors as intermediary devices that detect seismic waves and trigger control systems. These sensors act as mediators between the external seismic environment and the EVCS internal systems, enabling the charging station to sense and respond to seismic events automatically, thus improving safety without compromising service coverage.
2Reliability
If EVCS automatically disconnects during seismic events for safety, then reliability is improved, but operational continuity deteriorates
Solution Approach 1:
The system dynamically adjusts its operational state based on real-time seismic monitoring. During non-seismic periods, the EVCS operates normally with full functionality. When seismic events are detected, the system transitions to a safe state by disconnecting power. After the event subsides, the system automatically restores operations, creating a dynamic response that balances safety with operational continuity.
Solution Approach 2:
The patent implements a feedback mechanism where seismic sensors continuously monitor the environment and provide real-time data to the control system. This feedback loop enables automatic detection of seismic events, triggering disconnection protocols, and subsequent automatic restoration when safety conditions are met, ensuring both safety and minimal operational disruption.
3Reliability
If manual inspection and restoration procedures are used after seismic events, then safety is improved, but time consumption and operational downtime increase
Solution Approach 1:
The system performs self-service by automatically monitoring its own operational status through integrated sensors and control systems. After a seismic event, the EVCS autonomously verifies system integrity, checks for damage, and restores operations without requiring manual inspection. This self-diagnosis and self-restoration capability significantly reduces restoration time while maintaining safety standards.
Solution Approach 2:
The control system executes pre-programmed restoration protocols automatically after seismic events. These preliminary actions include systematic checking of critical components, gradual power restoration, and automated reporting to maintenance systems, eliminating the need for time-consuming manual inspection and accelerating the return to operational status.
4Reliability
If existing EVCS are retrofitted with seismic sensors, then safety capability is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The retrofit system is segmented into independent functional modules: seismic sensors, control units, and execution mechanisms. This modular segmentation allows each component to be installed and tested separately, simplifying the overall retrofit process. The segmented architecture reduces installation complexity while maintaining comprehensive seismic detection and response capabilities.
Solution Approach 2:
The control system is designed with multi-functionality, serving both normal operational control and seismic event response functions. By making the control system universal, the patent avoids adding separate dedicated systems for seismic response, thereby reducing overall device complexity while enhancing safety capabilities through a single integrated platform.
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 safe disconnection from the main power source during seismic events, performs system checks using an alternate power source, and restores energy when safe to do so, ensuring continued functionality and communication of operational status, allowing for vehicle charging and limited load energization even without main utility power.
Implementation Method 1
The accelerometer detects a seismic event by outputting a voltage indicative of a characteristic (e.g., magnitude) of the seismic event
Data Source
AI summary
An EVCS equipped with an accelerometer to detect seismic events. Upon sensing a catastrophic environmental event, the EVCS is automatically disconnected from the main utility power source. A controller powered by a backup or alternate power source inside the EVCS monitors the seismic activity, and upon sensing the seismic event is over, the EVCS automatically performs a startup check. If utility power is present and the self-check passes, the EVCS resets and provides power from the main utility to the charging connector. If the EVCS is operable but utility power is unavailable, the EVCS switches to a generator or a UPS. The EVCS can provide multiple power outlets, including USB outlets, and emergency lighting. The EVCS can also be retrofitted or constructed with a communications interface for communicating status and operational information following a seismic event.