Battery Pack Extinguisher Partitioning for Localized Fire Suppression
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Solution Overview
Problem
Existing battery pack fire extinguishing systems face issues where simultaneous activation of multiple fire extinguishing agents can spread flames and deplete agents before subsequent fires occur, leading to ineffective fire suppression.
Innovation Solution
A battery pack fire extinguisher design with a partition wall surrounding the fire extinguishing agent limits flame inflow to only the affected unit group, ensuring each fire extinguishing agent operates independently to extinguish localized fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fire extinguishing agents are installed in the battery pack, then the coverage for fire suppression is improved, but the risk of flame spread due to simultaneous ignition increases
Solution Approach 1:
The battery pack is divided into multiple unit groups, with each unit group having its own fire extinguishing agent. Partition walls are installed to physically separate the unit groups, preventing flame from spreading between them. This segmentation ensures that each fire extinguishing agent operates independently within its designated unit group, eliminating the risk of simultaneous ignition causing widespread flame propagation while maintaining comprehensive fire suppression coverage across the entire battery pack.
2Reliability
If all fire extinguishing agents are activated by a single flame, then immediate fire suppression is achieved, but no agents remain for subsequent fires
Solution Approach 1:
The battery pack is divided into multiple unit groups, with each unit group having its own fire extinguishing agent and protected by partition walls. When a fire occurs in one unit group, only the fire extinguishing agent in that specific unit group is activated, while agents in other unit groups remain intact. This segmentation ensures that fire suppression resources are preserved for subsequent fires in different unit groups, maintaining both immediate suppression capability and resource availability.
3Reliability
If partition walls are added to limit flame inflow, then fire containment is improved, but device complexity increases
Solution Approach 1:
The battery pack structure is segmented into multiple unit groups using partition walls that physically separate adjacent units. These partition walls serve as simple yet effective barriers that limit flame inflow to the fire extinguishing agent, containing fires within their unit groups. The segmentation approach provides robust fire containment through straightforward structural division rather than complex active control systems, achieving reliable fire isolation with minimal added complexity.
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 partition wall effectively guides flames to the corresponding fire extinguishing agent, preventing spread and ensuring each fire is extinguished without prematurely activating agents outside the affected unit group, thus efficiently managing multiple fires in a battery pack.
Implementation Method 1
a fire extinguishing agent between an inner surface of the top case and one end of a first one of the battery cells
Implementation Method 2
a partition wall on an outside of the fire extinguishing agent and protruding beyond, or with a height higher than, the fire extinguishing agent toward the first one of the battery cells
Data Source
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AI summary
A battery pack fire extinguisher includes: a plurality of battery cells; a bottom case accommodating the plurality of battery cells; a top case covering the plurality of battery cells and coupled to the bottom case; a fire extinguishing agent between an inner surface of the top case and one end of a first one of the plurality of battery cells; and a partition wall on an outside of the fire extinguishing agent and protruding beyond the fire extinguishing agent toward the first one of the plurality of battery cells.