Battery Pack Fire-Extinguishing Structure for Uniform Cell Coverage
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Solution Overview
Problem
Existing battery packs lack effective mechanisms to enhance fire extinguishing efficiency in the event of a battery cell ignition.
Innovation Solution
A battery pack design incorporating a housing, a battery cell with a vent, a cover, a fire-extinguishing member, and a support member that supplies fire-extinguishing material to the battery cell upon ignition, with a mechanism for uniform distribution of the extinguishing material using connection members and transfer holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fire-extinguishing member is added to supply fire-extinguishing material to the battery cell, then fire-extinguishing efficiency is improved, but device complexity increases
Solution Approach 1:
The fire-extinguishing member is pre-installed between the battery cell and the cover, containing fire-extinguishing material ready for deployment. When ignition occurs, the material is automatically supplied through transfer holes without requiring external intervention, thus improving fire-extinguishing efficiency while maintaining relatively simple structure
Solution Approach 2:
The fire-extinguishing member acts as an intermediary component between the battery cell and the external environment. It mediates the fire suppression process by containing and directing the fire-extinguishing material toward the battery cell through the support member and transfer holes, resolving the contradiction between effective fire suppression and structural simplicity
2Reliability
If a support member with transfer holes is used to distribute fire-extinguishing material uniformly, then fire-extinguishing efficiency is improved, but device complexity increases
Solution Approach 1:
The support member is segmented with multiple transfer holes distributed across its surface. This segmentation allows the fire-extinguishing material to be delivered through multiple separate channels, ensuring uniform distribution across different areas of the battery cell while keeping each individual transfer hole simple in structure
Solution Approach 2:
The transfer holes are strategically positioned at different locations on the support member to provide localized fire-extinguishing coverage. Each transfer hole delivers material to a specific region, ensuring comprehensive and uniform distribution across the entire battery cell surface without requiring a complex overall structure
Data Source
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AI summary
A battery pack includes a housing, a battery cell inside the housing and including a vent, a cover coupled to the housing and facing the battery cell, a fire-extinguishing member between the battery cell and the cover and configured to supply a fire-extinguishing material to the battery cell if the battery cell ignites, and a support member facing the fire-extinguishing member and configured to support the fire-extinguishing member.