Curable Composition

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Solution Overview

Problem

Conventional thermally conductive resin compositions for battery modules face challenges in achieving fast curing at low temperatures while maintaining excellent heat dissipation and adhesion properties, with existing solutions either compromising on thermal conductivity or causing thermal damage to components.

Innovation Solution

A curable composition that can cure at relatively low temperatures, combining a resin component with a thermal initiator to achieve fast curing, high thermal conductivity, and strong adhesion, using a combination of energy ray and heat curing methods to prevent thermal damage and ensure effective heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If thermal curing method is used for fast curing of acrylic resin composition, then curing speed is improved, but temperature must be maintained at 100°C or more causing thermal damage to battery components

Engineering Contradiction:

Improvecuring speedVSAvoidthermal damage to components

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the curing parameters by using a photopolymerization initiator system that enables curing at lower temperatures (below 100°C). The composition includes specific photopolymerization initiators ( Types A, B, and C with defined weight ratios) that allow the acrylic resin to cure effectively at reduced temperatures, thus maintaining fast curing speed while avoiding thermal damage to battery components.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the thermal curing mechanism with a photopolymerization mechanism. Instead of relying on heat activation, the curing process is initiated by light exposure through photopolymerization initiators. This substitution of the curing mechanism allows the composition to cure rapidly without requiring high temperatures, thereby preventing thermal damage to sensitive battery components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Temperature

If silicone resin is used for heat dissipation, then heat resistance is improved, but adhesion force is reduced

Engineering Contradiction:

Improveheat resistanceVSAvoidadhesion force

Core Design Contradiction:

TemperatureVSStrength

Solution Approach 1:

The patent creates a composite material system combining acrylic resin with specific photopolymerization initiators and fillers. This composite composition achieves both strong adhesion (through the acrylic resin matrix and coupling agents) and excellent heat resistance (through the cured polymer structure and thermally conductive fillers like alumina or boron nitride), resolving the trade-off between adhesion and heat resistance that plagues pure silicone resin applications.

Inventive Principle:

Principle #40Composite materials

3Strength

If polyurethane is used to secure adhesion force, then adhesion is improved, but thermal conductivity is reduced

Engineering Contradiction:

Improveadhesion forceVSAvoidthermal conductivity

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent formulates a composite composition where acrylic resin serves as the base polymer providing adhesion, combined with thermally conductive fillers (such as alumina, boron nitride, or silicon carbide particles) that enhance thermal conductivity. The photopolymerization process creates a crosslinked network that maintains strong bonding while the filler particles create thermal pathways, achieving both adhesion and heat dissipation performance.

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 curable composition enables rapid curing at reduced temperatures, ensuring the battery pack's components are protected from thermal damage while maintaining high thermal conductivity and adhesion, thus enhancing the battery module's performance and durability.

Implementation Method 1

a curable composition comprising a resin component and a photopolymerization initiator

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Implementation Method 2

a curable composition comprising a resin component and a thermal initiator

Methodology Applied

Scientific EffectThermal initiation:

Implementation Method 3

resin compositions in which thermally conductive fillers are blended with resins are known

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20240101740A1Curable Composition

Publication Date: 2024.03.28 LG CHEM LTD

AI summary

A curable composition is capable of forming a thick film having excellent curing characteristics even at a relatively low temperature and is capable of securing an excellent level of thermal conductivity as well as a desired level of appropriate adhesion force while having fast curing characteristics. A battery pack to which the curable composition is applied, and a device comprising the battery pack are also provided.