Pouch Battery Adhesion Using Photocurable UV Curing

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Solution Overview

Problem

Pouch type batteries face challenges with exposed metal layers causing electrical shorts and require manual taping for adhesion, leading to cumbersome and non-uniform processes.

Innovation Solution

The use of a photocurable adhesive to cover and fix the adhesion parts of the pouch type battery, eliminating the need for manual taping and ensuring uniform adhesion, thereby protecting the metal layers from exposure and preventing electrical shorts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual taping process is used to protect exposed metal layers and fix adhesion parts, then the metal layers are protected and adhesion parts are fixed, but the manufacturing process becomes cumbersome and non-uniform

Engineering Contradiction:

Improveprotection of metal layers and adhesion qualityVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the manual mechanical taping process with an automated adhesive application system. The adhesive is applied through a nozzle or coating device that automatically deposits adhesive material on the adhesion parts, eliminating the need for manual tape application while achieving uniform and reliable adhesion.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the state of the adhesive from liquid to solid through UV irradiation. The adhesive is applied in liquid form to allow automated coating, then transformed into a solid state through UV curing, providing both ease of application and strong bonding capability.

Inventive Principle:

Principle #35Parameter changes

2Extent of automation

If automated adhesive application is used instead of manual taping, then the manufacturing process is simplified and automated, but additional components (adhesive) are introduced

Engineering Contradiction:

Improveadhesion process automationVSAvoidnumber of components

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The adhesive serves multiple functions simultaneously: it acts as an adhesive to bond adhesion parts, as a protective coating for exposed metal layers, and as an insulating layer. This multi-functionality reduces the need for separate components while achieving automation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses a composite material system consisting of the pouch, adhesion parts, and adhesive. The adhesive integrates with the existing pouch structure, creating a composite assembly that combines the strengths of different materials while maintaining structural integrity and enabling automated processing.

Inventive Principle:

Principle #40Composite materials

3Reliability

If photocurable adhesive is used to cover exposed metal layers, then electrical shorts are prevented and adhesion is improved, but UV irradiation equipment is required

Engineering Contradiction:

Improveprevention of electrical shortsVSAvoidequipment requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The adhesive undergoes a phase transition from liquid to solid through UV irradiation-induced photopolymerization. This phase change allows the adhesive to be applied easily in liquid form and then固化 into a strong, protective, and insulating solid layer that prevents electrical shorts.

Inventive Principle:

Principle #36Phase transitions

Solution Approach 2:

The patent replaces mechanical fastening or protective methods with a chemical bonding mechanism. The photocurable adhesive provides both mechanical adhesion and electrical insulation through its chemical structure, eliminating the need for additional protective components or complex mechanical assemblies.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution simplifies the manufacturing process, enhances adhesion quality, and prevents electrical shorts by automating the adhesion process and securing the adhesion parts to the pouch using a UV-hardened two-component adhesive.

Implementation Method 1

The photocurable adhesive may be a two-component adhesive having an insulating hardener hardened by ultraviolet (UV) rays and an insulating resin mixed therein.

Methodology Applied

Scientific EffectPhotopolymerisation: Photopolymerisation

Implementation Method 2

The photocurable adhesive, disposed between the opposing sides of the pouch and interior sides of the adhesion parts, may adhere the adhesion parts to the opposing sides of the pouch

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS9412978B2Pouch type battery

Publication Date: 2016.08.09 SAMSUNG SDI CO LTD

AI summary

A pouch type battery that can protect a metal layer exposed to ends of a pouch using a photocurable adhesive and can fix adhesion parts to the pouch, thereby achieving a simplified, automated process, instead of a manually taping process. The pouch type battery includes an electrode assembly including a first electrode plate, a second electrode plate and a separator, a pouch accommodating the electrode assembly and having adhesion parts formed by adhering opposing edges, and a photocurable adhesive applied to the adhesion parts of the pouch and sides of the pouch.