Battery Module Heat Dissipation Member Structure

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Solution Overview

Problem

Existing battery modules face challenges in achieving high thermal conductivity and uniform temperature distribution while minimizing size and complexity, leading to potential overheating and safety issues due to the limitations of coolant channels and thermal conductivity in conventional designs.

Innovation Solution

A battery module structure featuring plate-shaped cells with heat dissipation members at multiple interfaces and a heat exchange member that integrates heat dissipation members, utilizing a thicker connection part for enhanced thermal conductivity and a heat exchange member with coolant channels for efficient heat transfer, allowing for effective heat dissipation without increasing module size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If coolant channels are defined between stacked battery cells, then heat removal is improved, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveheat removal efficiencyVSAvoidcooling system complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The heat dissipation member integrates multiple functions: it serves as both a thermal conduction path (replacing complex coolant channels) and a structural support element. By combining heat dissipation and structural functions into a single component, the design eliminates the need for separate coolant channels while maintaining effective heat removal.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention extracts the essential heat removal function from the complex coolant channel system and implements it through a simpler thermal conduction path using high-thermal-conductivity material, removing unnecessary complexity while preserving the core cooling capability.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If battery cells are stacked with high integration, then productivity and capacity density are improved, but heat accumulation increases

Engineering Contradiction:

Improvebattery integration densityVSAvoidheat accumulation

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The heat dissipation member acts as an intermediary component between closely stacked battery cells, providing a thermal conduction path that enables high integration while effectively managing heat. This mediator allows cells to be positioned close together for high density without suffering from heat accumulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If laminate sheet with polymer coating is used for battery case, then ease of manufacture and cost are improved, but thermal conductivity deteriorates

Engineering Contradiction:

Improvemanufacturing ease and costVSAvoidthermal conductivity

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

The heat dissipation member is made of high-thermal-conductivity material that complements the polymer-coated laminate sheet. This composite approach maintains the manufacturing advantages of the polymer case while adding superior thermal conduction capability through the heat dissipation member, solving the thermal conductivity limitation of polymer materials.

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

This configuration achieves higher cooling efficiency and uniform temperature distribution, reducing the risk of overheating and extending the lifespan and safety of battery modules by effectively managing heat generated during charge and discharge cycles.

Implementation Method 1

heat generated from the battery cells during charge and discharge of the battery cells is removed by the heat exchange member via the heat dissipation members

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

heat generated from the battery cells during charge and discharge of the battery cells is removed by the heat exchange member

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentEP2479836B1Battery module and medium or large battery pack including a heat-dissipating member having a novel structure

Publication Date: 2016.03.16 LG CHEM LTD

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AI summary

Disclosed herein is a battery module including a plurality of plate-shaped battery cells mounted in a module case in a stacked state, wherein each of the plate-shaped battery cells is configured in a structure in which an electrode assembly is mounted in a battery case formed of a laminate sheet, the battery module is configured in a structure in which a plurality of heat dissipation members disposed at two or more interfaces between the battery cells and a heat exchange member to integrally interconnect the heat dissipation members are mounted at one side of a battery cell stack, and heat generated from the battery cells during charge and discharge of the battery cells is removed by the heat exchange member via the heat dissipation members, and each of the heat dissipation members includes a main body part disposed at the interface between the corresponding battery cells, a connection part connected to the main body part in a state in which the connection part is exposed outward from the stacked battery cells, and a top part perpendicularly extending from the connection part in opposite directions so that the top part contacts the heat exchange member, the connection part having a greater thickness than the main body part.