EV Charger Fire Detection and Zone Shutdown Control
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Solution Overview
Problem
Fires in Li-Ion batteries of electric vehicles are difficult to contain and can cause extensive damage, often occurring during charging or accidents, with current systems lacking automated mechanisms to prevent or restrict such fires in their early stages.
Innovation Solution
A fire safe electric vehicle charging system that includes a heat/smoke/gas/particle sensor, a turn-off switch, a processor, and a memory storing software instructions to automatically detect fires and shut off charging, connected to a fire alarm system that can control EV chargers in a zone, building, or parking area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automated fire detection and shutdown mechanism is implemented, then fire safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the fire detection system with the EV charging system by integrating a fire detector, control unit, and communication interface into a unified automated mechanism. The control unit receives signals from the fire detector and automatically sends shutdown commands to the charging system, merging safety monitoring and charging control functions into one integrated system that reduces overall complexity while improving fire safety.
Solution Approach 2:
The control unit acts as an intermediary between the fire detector and the EV charging system. When the fire detector identifies smoke or heat, it sends a signal to the control unit, which then mediates the shutdown process by communicating with the charging system to stop power delivery. This intermediary approach simplifies the architecture compared to direct connection while maintaining automated safety response.
2Device complexity
If manual fire response procedure is used, then system complexity is reduced, but response time increases and fire impact worsens
Solution Approach 1:
The system performs preliminary actions by pre-configuring the automated shutdown mechanism before any fire incident occurs. The control unit is pre-programmed with shutdown protocols and communication protocols with the EV charging system, so that when a fire is detected, the predetermined shutdown sequence executes immediately without requiring manual intervention or decision-making time.
Solution Approach 2:
The system implements a feedback loop where the fire detector continuously monitors the environment and provides real-time information to the control unit. When smoke or heat thresholds are exceeded, the feedback signal triggers an automatic shutdown command to the charging system, creating a closed-loop control system that responds instantly to fire conditions without human delay.
3Extent of automation
If fire detection system is integrated with EV charging system, then automated shutdown is achieved, but manufacturing cost increases
Solution Approach 1:
The control unit is designed with multi-functionality, serving both as a charging management controller and a fire safety control unit. It handles normal charging operations while also processing fire detector signals and executing shutdown protocols. This universal design eliminates the need for separate dedicated fire safety controllers, reducing component count and manufacturing costs while maintaining full automated shutdown capability.
Solution Approach 2:
The system implements self-service by using the existing communication infrastructure and control interfaces of the EV charging system for fire shutdown operations. The control unit leverages the charging system's own communication protocols and power control mechanisms to execute fire safety shutdowns, eliminating the need for separate shutdown actuators or specialized fire safety hardware, thereby reducing manufacturing complexity and cost.
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 system effectively reduces the impact of potential fires by automatically shutting off charging and allowing vehicles to be moved away from chargers, potentially preventing large fires by detecting smoke early and initiating a controlled shutdown.
Implementation Method 1
detect a fire by sensing heat/smoke/particles via the heat/smoke/gas/particle sensor
Data Source
AI summary
An electric vehicle (EV) charging management system comprises an EV charging system for charging a Li-Ion battery and an automatic mechanism related to charging of a hybrid/electric vehicle (H/EV) to avoid or restrict fires affecting the Li-Ion battery. The automatic mechanism comprises a heat/smoke/gas/particle sensor, a turn-off switch, a processor and a memory storing software (SW) instructions that, when executed by the processor, cause the automatic mechanism to detect a fire and shut off charging to H/EV(s). The automatic mechanism further comprises a fire alarm system for protecting a certain zone. The fire alarm system includes different control groups, with a set of causes and effects. The EV charging management system to connect an EV charger to a control group. The EV charging management system can shut down all EV chargers either in a same zone as where the fire is detected, or in an entire building or adjacent buildings or in a parking area.