Segmented Heat Dissipation Member for Battery Module Isolation

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Solution Overview

Problem

Existing battery packs face challenges in effectively dissipating heat while preventing heat propagation between adjacent battery modules, which can lead to secondary ignition or explosion during thermal runaway.

Innovation Solution

A heat dissipation member comprising a heat dispersion member with integrally formed first and second heat dispersion parts, a heat insulating member along the outer surface, and a cooling member, strategically positioned between battery modules to create a separation space and enhance heat dissipation while blocking heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a heat dissipation member is placed between battery modules to dissipate heat, then heat dissipation performance is improved, but heat may propagate to adjacent battery modules causing secondary ignition

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidheat propagation between battery modules

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The heat dissipation member is divided into multiple heat dispersion parts (first heat dispersion part and second heat dispersion part) that are spaced apart from each other. This segmentation allows heat to be dissipated in multiple directions while preventing heat propagation to adjacent battery modules through the spaces between the dispersion parts.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A heat insulating member is introduced as an intermediary substance between the heat dispersion parts and the battery modules. This heat insulating member blocks heat propagation to adjacent battery modules while allowing the heat dissipation member to effectively dissipate heat from the battery pack.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If battery modules are placed closely together to increase energy density, then space utilization is improved, but heat propagation between modules increases risk of secondary ignition

Engineering Contradiction:

Improveenergy densityVSAvoidheat propagation risk

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The heat insulating member serves as a mediator between closely spaced battery modules, enabling high energy density while preventing heat propagation. The insulating member is positioned between adjacent battery modules to block thermal runaway propagation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heat dissipation member with spaced-apart dispersion parts creates thermal zones that segment the heat flow paths, allowing battery modules to be placed closely while maintaining thermal safety through the segmented heat dissipation structure.

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If a solid heat dissipation structure is used to block heat propagation, then heat propagation prevention is improved, but heat dissipation efficiency decreases

Engineering Contradiction:

Improveheat propagation preventionVSAvoidheat dissipation efficiency

Core Design Contradiction:

Object-affected harmful factorsVSTemperature

Solution Approach 1:

The heat dissipation member has different local structures: heat dispersion parts with high thermal conductivity for efficient heat dissipation, and spaced regions with heat insulating members for heat propagation prevention. This local quality differentiation optimizes both heat dissipation efficiency and heat propagation prevention.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The heat dissipation member combines materials with different thermal properties: high thermal conductivity materials for the dispersion parts to dissipate heat efficiently, and heat insulating materials for the insulating member to prevent heat propagation to adjacent modules.

Inventive Principle:

Principle #40Composite materials

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 solution effectively dissipates heat and prevents heat propagation between battery modules, thereby reducing the risk of secondary ignition or explosion by creating a separation space and utilizing materials with high thermal conductivity and insulation properties.

Implementation Method 1

a heat dispersion member including a first heat dispersion part and a second heat dispersion part... utilizing materials with high thermal conductivity

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a heat insulating member formed along an outer surface of the heat dispersion member... blocking heat transfer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS20240055688A1Heat Dissipation Member and Battery Pack Including Same

Publication Date: 2024.02.15 LG ENERGY SOLUTION LTD

AI summary

A heat dissipation member includes a heat dispersion member including a first heat dispersion part and a second heat dispersion part, and a heat insulating member formed along an outer surface of the heat dispersion member.