Battery Module Assembly Paste Injection Channel

Solution Overview

Problem

Conventional battery module assemblies face inefficiencies in thermal paste application, leading to increased thermal resistance and reduced productivity due to separate processes for filling thermal paste within the battery module and coating it between the module and the cooling plate.

Innovation Solution

A battery module assembly design that integrates the thermal paste filling process within the module and between the module and the cooling plate, utilizing a paste channel system with injection and discharge holes to ensure uniform distribution and fixation, thereby improving cooling performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If thermal paste is applied separately to the battery module interior and to the interface between the battery module and cooling plate, then the thermal paste can be applied to both locations, but the process requires repeated coating operations which reduces productivity and does not guarantee uniform distribution

Engineering Contradiction:

Improveuniform distribution of thermal pasteVSAvoidassembly efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent combines two separate thermal paste application processes (filling the battery module interior and coating the interface between battery module and cooling plate) into a single integrated process. Thermal paste is injected once through the injection hole, fills the battery module interior through the first paste channel, then continues through the second paste channel to coat the interface with the cooling plate, achieving both locations in one operation.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If thermal paste is applied separately to the battery module interior and to the interface between the battery module and cooling plate, then both areas receive thermal paste, but the separate processes increase thermal resistance at the interface due to non-uniform application

Engineering Contradiction:

Improveuniform distribution of thermal pasteVSAvoidthermal resistance at interface

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The patent combines two separate thermal paste application processes (filling the battery module interior and coating the interface between battery module and cooling plate) into a single integrated process. Thermal paste is injected once through the injection hole, fills the battery module interior through the first paste channel, then continues through the second paste channel to coat the interface with the cooling plate, achieving both locations in one operation.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If separate coating processes are used for the battery module interior and the cooling plate interface, then each area can be treated individually, but the repeated coating operations increase processing time and reduce productivity

Engineering Contradiction:

Improveprocess flexibilityVSAvoidassembly speed

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent combines two separate thermal paste application processes (filling the battery module interior and coating the interface between battery module and cooling plate) into a single integrated process. Thermal paste is injected once through the injection hole, fills the battery module interior through the first paste channel, then continues through the second paste channel to coat the interface with the cooling plate, achieving both locations in one operation.

Inventive Principle:

Principle #5Merging (Combining)

4Strength

If thermal paste is applied to the bottom surface for cooling plate attachment, then the cooling plate can be fixed, but the thermal paste does not spread uniformly when coupled, increasing thermal resistance

Engineering Contradiction:

Improvefixation strengthVSAvoidthermal resistance at interface

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent introduces a second paste channel as an intermediary pathway that guides thermal paste from the battery module interior through the discharge hole and onto the interface between the battery module and cooling plate. This controlled pathway ensures uniform distribution of thermal paste at the interface, improving both fixation strength and thermal conduction.

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

This integrated approach enhances productivity and minimizes thermal resistance at the interface, resulting in improved cooling performance by ensuring uniform thermal paste distribution between the battery module and the cooling plate.

Implementation Method 1

improve thermal conduction by injecting a thermal paste through an injection hole

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a cooling plate provided for cooling the battery module

Methodology Applied

Scientific EffectHeat transfer: Convection

Data Source

PatentEP3410513B1Battery module assembly

Publication Date: 2021.04.28 LG ENERGY SOLUTION LTD

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AI summary

A battery module assembly includes a battery module and a cooling plate attached to the battery module, wherein the battery module has a first paste injection hole for injecting a thermal paste into the battery module and a first paste discharge hole for discharging the thermal paste out of the battery module, and wherein the cooling plate has a second paste injection hole formed at a location corresponding to the first paste injection hole and a second paste discharge hole for allowing the thermal paste discharged out of the battery module through the first paste discharge hole to be discharged out of the battery module assembly.