Battery Module Base Plate Venting With Mesh Flame Blocking

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

High-capacity battery packs face increased risks of secondary ignition and explosion due to flame transfer through gas passages and air cooling methods promoting ignition propagation, necessitating improved safety and cooling mechanisms.

Innovation Solution

A battery module design featuring a base plate with anti-inflammatory mesh sheets covering gas discharge passages, indirect coolant channels, and thermally conductive pads, along with mesh-covered exhaust holes, to prevent flame transfer and enhance cooling efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If air cooling method is used to dissipate heat from secondary batteries, then cooling efficiency is improved, but flame propagation to neighboring batteries is accelerated

Engineering Contradiction:

Improvecooling efficiencyVSAvoidflame propagation

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

An anti-inflammatory mesh sheet is introduced as an intermediary component in the gas discharge passage. This mesh sheet allows heat dissipation while blocking flame propagation, serving as a mediator that separates the cooling function from the harmful flame transfer effect.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The base plate is designed with different functional zones: areas with anti-inflammatory mesh sheets for flame blocking, areas with coolant channels for heat dissipation, and gas discharge passages for pressure relief. Each zone has localized properties optimized for its specific function, resolving the contradiction between cooling efficiency and flame propagation prevention.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If gas discharge passage is provided to vent gas from secondary batteries, then gas discharge function is improved, but flame transfer to neighboring batteries occurs

Engineering Contradiction:

Improvegas discharge functionVSAvoidflame transfer

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The anti-inflammatory mesh sheet serves as an intermediary component installed in the gas discharge passage. It allows gas to pass through while blocking flame propagation, enabling gas discharge functionality while preventing the harmful effect of flame transfer to neighboring batteries.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If high-capacity battery pack is designed with multiple secondary batteries, then energy storage capacity is improved, but risk of secondary ignition and explosion increases

Engineering Contradiction:

Improveenergy storage capacityVSAvoidrisk of secondary ignition

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The anti-inflammatory mesh sheet converts the potentially harmful gas discharge passage into a beneficial safety feature. By allowing gas to escape while blocking flame propagation, the mesh sheet transforms a potential fire hazard into a protective mechanism that prevents secondary ignition in high-capacity battery packs.

Inventive Principle:

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

Solution Approach 2:

The mesh sheet acts as an intermediary safety component between neighboring secondary batteries. It allows necessary gas discharge while blocking flame propagation, thereby reducing the risk of secondary ignition and explosion in high-capacity battery packs with multiple batteries.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 effectively reduces the risk of secondary explosions and fires by blocking flame propagation and improving cooling, enhancing safety and stability in battery modules.

Implementation Method 1

at least one anti-inflammatory mesh sheet configured to cover the open portion

Methodology Applied

Scientific EffectFlame blocking: Filter (physical)

Implementation Method 2

indirect coolant channels

Methodology Applied

Scientific EffectConvection cooling: Convection

Implementation Method 3

thermally conductive pads

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS12355090B2Battery module including base plate having gas discharge passage, and battery pack and energy storage system including the same

Publication Date: 2025.07.08 LG ENERGY SOLUTION LTD

AI summary

A battery module including a base plate, a front cover at a first end of the base plate and a rear cover at a second end of the base plate, the rear cover spaced from the front cover in a first direction, a pair of gas discharge passages extending in the first direction, an outlet in the rear cover for each of the pair of gas discharge passages, and a mesh cover over each outlet, wherein each of the pair of gas discharge passages has an open portion formed by a top of the gas discharge passage.