Flexible Battery Supporting Member for Rollable Display

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Solution Overview

Problem

Flexible batteries in rollable display devices face degradation and damage due to excessive bending, penetration, and lack of protection, leading to performance issues and safety concerns.

Innovation Solution

A rollable display device design featuring a flexible battery with a supporting member and a fabric layer containing silver nanomaterials, where the battery's electrode assembly and exterior material patterns are aligned for uniform shrinkage and relaxation, and the supporting member provides protection against twisting and penetration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a pouch-type battery is used to achieve flexibility and high energy density, then the battery can be manufactured in various shapes and achieve high energy density per mass, but the electrode assembly is vulnerable to breaking when excessively bent or twisted

Engineering Contradiction:

Improveenergy density per massVSAvoidelectrode assembly integrity

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

A supporting member is disposed on at least one surface of the flexible battery to provide protective cushioning before excessive bending or twisting occurs. This supporting member prevents the electrode assembly from breaking by absorbing and distributing mechanical stress, thereby maintaining electrode assembly integrity while preserving the flexibility and high energy density characteristics of the pouch-type battery

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Device complexity

If a pouch-type battery is used without additional protection, then the structure remains simple and manufacturing is easier, but the battery is vulnerable to penetration by sharp tools or edges of objects

Engineering Contradiction:

Improvebattery structure complexityVSAvoidpenetration damage

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The supporting member is disposed on at least one surface of the flexible battery to provide protective cushioning before penetration damage can occur. This supporting member acts as a protective barrier that distributes the force of sharp objects or edges, preventing penetration of the pouch-type battery while maintaining relatively simple structure and manufacturing processes

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Adaptability or versatility

If the battery is made flexible to enable rolling, then the display can be rolled for portability, but the battery and display may be excessively deformed or twisted

Engineering Contradiction:

Improverolling capabilityVSAvoidshape stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The supporting member is disposed on at least one surface of the flexible battery to provide protective cushioning before excessive deformation or twisting occurs during rolling. This supporting member maintains shape stability by distributing mechanical stress during rolling operations, thereby preventing excessive deformation while preserving the rolling capability for portability

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The supporting member acts as an intermediary between the flexible battery and external forces during rolling. It mediates the mechanical stress by distributing it across the battery surface, preventing direct transmission of excessive forces that would cause deformation or twisting, thereby enabling safe rolling operations

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

The solution prevents battery performance degradation, reduces deformation and breakage, and offers electromagnetic wave blocking benefits, enhancing the device's reliability and user safety.

Implementation Method 1

a flexible battery according to the present invention is protected by a supporting member formed with a plate member, the flexible battery is prevented from being penetrated, and thus the flexible battery is prevented from being broken due to the penetration, and since the supporting member and the flexible battery are covered by a fabric layer including a silver nanomaterial, a beneficial effect can be provided to a human body, and electromagnetic waves can be blocked

Methodology Applied

Scientific EffectElectromagnetic wave blocking: Absorption (EM radiation)

Data Source

PatentUS10203726B2Rollable display device

Publication Date: 2019.02.12 AMOGREENTECH CO LTD

AI summary

A rollable display device is provided. An exemplary embodiment of the present invention provides a rollable display device including: a display body including a display unit configured to display various types of information as an image on one surface thereof and provided to be rollable; and a flexible battery provided on the display body and configured to supply power to the display body.