Multi-Stage Battery Fire Suppression for Thermal Runaway Containment
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Solution Overview
Problem
Modern battery technologies, such as lithium-ion batteries, are prone to flammable materials and gases when overheating, leading to challenging fire suppression due to high temperatures and rapid spread between adjacent battery cells, especially in sealed housings.
Innovation Solution
A container system with a multi-stage fire suppression system, including multiple fire suppressant containers and processing circuitry, which detects thermal events or fires and sequentially activates the suppressant containers to provide targeted fire suppression across different coverage areas and zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-stage fire suppression system is used, then the system complexity is low, but the fire suppression effectiveness is insufficient for rapidly spreading battery fires
Solution Approach 1:
The fire suppression system is divided into multiple stages with different suppressant containers (first fire suppressant container, second fire suppressant container, third fire suppressant container) that are sequentially activated. Each stage targets different coverage areas (module level, subpack level, pack level) to progressively contain and suppress the fire, improving suppression effectiveness while maintaining manageable system complexity through modular design
Solution Approach 2:
The system pre-configures multiple fire suppressant containers with different coverage areas and activation sequences before a fire event occurs. The processing circuitry is pre-programmed with detection thresholds and activation logic, enabling rapid sequential deployment of suppressants without requiring real-time complex decision-making during the fire event
2Area of stationary object
If fire suppressant is discharged to the entire shipping container, then the coverage area is maximized, but the suppressant quantity required increases significantly
Solution Approach 1:
The suppression strategy is segmented into three stages with progressively expanding coverage areas. The first container targets a small module-level area, the second container expands to subpack-level coverage, and the third container provides pack-level coverage. This segmented approach ensures adequate suppression at each level while minimizing the total suppressant quantity required compared to flooding the entire container
Solution Approach 2:
The system applies partial suppression action at each stage, activating only the necessary number of suppressant containers based on the detected fire extent. Rather than deploying all suppressants simultaneously to maximum coverage, the system uses progressive partial deployment, activating subsequent containers only if the fire persists or spreads, thereby optimizing suppressant quantity usage
3Speed
If multiple fire suppressant containers are activated simultaneously, then the fire suppression speed is increased, but the system complexity and suppressant consumption increase
Solution Approach 1:
The system employs periodic sequential activation of fire suppressant containers based on detected fire conditions. The processing circuitry monitors temperature or fire detection data and activates subsequent suppressant containers in sequence based on predefined thresholds and time intervals, achieving rapid yet controlled suppression without requiring simultaneous complex coordination of all containers
Solution Approach 2:
The processing circuitry continuously monitors detection data from sensors within the shipping container and uses this feedback to determine when to activate each subsequent stage of fire suppression. The system adjusts activation timing and sequence based on real-time fire detection, enabling rapid response while maintaining simple control logic through condition-based sequential activation
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 multi-stage fire suppression system effectively contains and suppresses fires at battery cells by providing targeted and escalating levels of fire suppressant, minimizing damage and preventing the spread of thermal events.
Implementation Method 1
provide fire suppression according to multiple stages of fire suppression... sequentially activate the fire suppressant containers to provide fire suppression... suppress a fire at one or more of the battery cells
Data Source
AI summary
A container system includes a shipping container including multiple battery cells and a fire suppression system. The fire suppression system includes multiple fire suppressant containers and processing circuitry. The fire suppressant containers are each configured to store fire suppressant and discharge the fire suppressant to a coverage area of the shipping container. The processing circuitry is configured to obtain detection data indicating a detection of a thermal event or a fire within the shipping container. The processing circuitry is configured to, in response to the detection of the thermal event or the fire within the shipping container, sequentially activate the fire suppressant containers to provide fire suppression according to multiple stages of fire suppression.