Battery Pack Extinguisher With Through-Hole Cooling Vent Path

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Solution Overview

Problem

Existing battery pack fire extinguishing systems fail to effectively prevent the spread of fire from one cell to surrounding cells due to the lack of a mechanism that allows for rapid heat dissipation and efficient application of fire extinguishing agents, often leading to increased cell temperatures and slow extinguishing.

Innovation Solution

A battery pack fire extinguisher design that incorporates a fire extinguishing agent with through holes aligned with battery cell vents, allowing flames to pass through and ignite the agent, which then generates aerosol spray material to extinguish the fire without blocking the flame's path, thereby forming a hole for rapid cooling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the fire extinguishing agent is positioned vertically above the battery cell to prevent flame, then the flame is extinguished, but holes are not formed in the top case and cooling is delayed

Engineering Contradiction:

Improvefire extinguishing effectivenessVSAvoidbattery cell cooling speed

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The fire extinguishing agent acts as an intermediary substance positioned between the battery cell and top case. It allows the flame to pass through it to reach the top case and form a cooling hole, while simultaneously generating smoke to suppress the flame. This mediator enables both flame extinction and hole formation to occur together.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the spatial parameter of the fire extinguishing agent from vertical positioning above the cell to horizontal positioning between the cell and top case. This parameter change allows the flame to traverse the agent horizontally, ensuring both flame suppression and top case penetration for cooling hole formation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the fire extinguishing agent blocks the flame path to extinguish fire, then flame is suppressed, but heat dissipation is reduced and cell temperature increases

Engineering Contradiction:

Improvefire suppression capabilityVSAvoidbattery cell temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The fire extinguishing agent is designed with porous characteristics that allow flame and heat to pass through while providing sufficient surface area for smoke generation. The porous structure enables simultaneous flame suppression and heat dissipation by allowing thermal energy to traverse the material.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The fire extinguishing agent serves as a thermal intermediary that facilitates heat transfer from the battery cell to the top case while suppressing flame. It mediates between the hot cell and cooler top case environment, enabling controlled heat dissipation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the top case is intact to maintain structural integrity, then structural strength is preserved, but heat cannot escape and cooling is delayed

Engineering Contradiction:

Improvetop case structural integrityVSAvoidbattery cell cooling efficiency

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The fire extinguishing agent performs preliminary action by allowing the flame to pass through it and ignite the top case material before the top case would otherwise fail. This controlled preliminary ignition creates a cooling hole at the optimal moment, balancing structural integrity with cooling needs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention converts the harmful effect of flame (which would normally destroy the top case) into a beneficial cooling mechanism. By allowing the flame to pass through the fire extinguishing agent and reach the top case, the top case material is intentionally ignited to create a cooling hole, transforming potential structural failure into an active cooling feature.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 design ensures rapid extinguishing of flames by guiding them through the extinguishing agent, minimizing heat reflection, and ensuring sufficient smoke generation for effective fire suppression, preventing the spread of fire to adjacent cells.

Implementation Method 1

a flame from the battery cell is guided to the fire extinguishing agent to ignite the fire extinguishing agent

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 2

the smoke generated from the fire extinguishing agent, that is, the aerosol spray material, is induced into the battery cell to extinguish the fire

Methodology Applied

Scientific EffectHeat absorption: Absorption (physical)

Data Source

PatentUS20250316834A1Battery pack fire extinguisher

Publication Date: 2025.10.09 SAMSUNG SDI CO LTD

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; and a fire extinguishing agent between an inner surface of the top case and one end of one of the plurality of battery cells facing the top case. The fire extinguishing agent has a through hole corresponding to the one of the plurality of battery cells.