Battery Pack Fire-Fighting Tank for Thermal Propagation Suppression
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Solution Overview
Problem
Existing battery packs face challenges in suppressing thermal events from propagating between cells, which can lead to ignition or explosion, posing safety risks, especially in home battery packs.
Innovation Solution
A battery pack design featuring a blocking member with heat-insulating material and openings for fire extinguishing agent flow, combined with a fire-fighting tank to discharge agents and prevent thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are disposed densely to increase energy density, then energy density is improved, but thermal propagation between cells occurs leading to safety risks
Solution Approach 1:
The battery pack is divided into multiple battery cell groups, with blocking members positioned between adjacent groups to prevent thermal propagation. This segmentation allows dense packing of cells while maintaining safety barriers between groups.
Solution Approach 2:
Blocking members serve as intermediary components between adjacent battery cell groups. These blocking members include heat insulating materials that act as thermal barriers, preventing heat transfer between cells while allowing the cells to be disposed densely.
2Reliability
If blocking members are added between battery cells to suppress thermal propagation, then safety is improved, but device complexity increases
Solution Approach 1:
The blocking members are designed to perform multiple functions: they provide thermal insulation to prevent heat propagation, maintains spacing between battery cell groups, and provides structural support. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The blocking members combine heat insulating materials with structural support functions into a single integrated component. This merging of functions simplifies the overall battery pack structure compared to using separate insulation layers and support structures.
3Reliability
If additional safety components are added to prevent thermal runaway, then safety is improved, but manufacturing cost increases
Solution Approach 1:
The blocking members with heat insulating materials provide passive thermal protection without requiring active control systems, sensors, or additional power consumption. The insulation properties inherently prevent thermal propagation without needing external intervention or complex control mechanisms.
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
Effectively suppresses thermal events within the battery pack, enhancing safety by preventing propagation and reducing the need for additional components, while maintaining manufacturability and economic efficiency.
Implementation Method 1
a plate-shaped blocking member disposed between adjacent battery cells and erected in a vertical direction... the blocking member includes a heat insulating material
Implementation Method 2
the blocking member is configured to allow the fire extinguishing agent discharged from the fire-fighting tank to flow thereinto
Data Source
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AI summary
A battery pack according to one embodiment of the present disclosure includes a cell module assembly including a battery cell stack in which a plurality of battery cells are stacked and each battery cell is erected in a vertical direction; a plate-shaped blocking members disposed between adjacent battery cells and erected in a vertical direction; a pack case configured so as to house the cell module assembly and opened at its upper surface; and a fire-fighting tank located above the cell module assembly and covering an upper surface of the pack case, wherein the blocking member includes a plurality of openings at its upper end, and an inside of the blocking member includes an empty space connected to the plurality of openings.