Battery Pack Extinguisher Partitioning for Sequential Cell Fire Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery pack fire extinguishing systems face issues where flames from one battery cell can spread to surrounding cells due to concurrent activation of multiple fire extinguishing agents, leading to insufficient extinguishing capacity for subsequent fires.
Innovation Solution
A battery pack fire extinguisher with a partition wall surrounding the fire extinguishing agent limits the inflow range of flames to the agent, ensuring that only the affected unit group's extinguishing agent operates, while other groups remain inactive until needed.
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 concurrent activation increases
Solution Approach 1:
The battery pack is divided into multiple unit groups, with each group having its own fire extinguishing agent. Partition walls are installed to physically separate these unit groups, ensuring that fire suppression is localized to the affected area only. This segmentation prevents concurrent activation of all extinguishing agents and eliminates the risk of flame spread caused by simultaneous operation of multiple agents.
2Speed
If all fire extinguishing agents are activated by a single flame, then immediate suppression is achieved, but the capacity to handle subsequent fires is depleted
Solution Approach 1:
The fire extinguishing system is segmented into multiple independent units, each serving a specific unit group of battery cells. When a fire occurs, only the extinguishing agent in the affected unit group is activated, preserving the capacity of other agents for potential subsequent fires in different areas.
3Reliability
If partition walls are added to limit flame inflow range, then fire containment is improved, but the device complexity increases
Solution Approach 1:
The battery pack structure is segmented into multiple unit groups using partition walls. Each partition wall is designed to extend from the bottom case to the top case, creating physical barriers that limit flame spread. This segmentation approach achieves effective fire containment while maintaining a relatively simple overall structure that integrates seamlessly with the battery pack design.
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
This design effectively extinguishes fires in individual battery cell groups without prematurely activating extinguishing agents in unaffected areas, ensuring efficient and sequential fire suppression across multiple occurrences.
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 the fire extinguishing agent toward the first one of the battery cells
Data Source
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.