Flexible Battery and Light-Emitting Structure With Bend-Limiting Projections

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Solution Overview

Problem

Existing wearable devices require flexible and lightweight power storage and display devices that can conform to body curves without breaking, and light-emitting elements need to be thinner, lighter, and more reliable for wearable applications.

Innovation Solution

Incorporating a member with rubber elasticity and projections on the power storage device and light-emitting device to enhance flexibility and safety, with projections contacting each other when bent to prevent excessive deformation, and using a DC-DC converter for efficient power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the power storage device is made flexible to conform to body curves, then the adaptability to wearable devices is improved, but the reliability and resistance to breaking is worsened

Engineering Contradiction:

ImproveflexibilityVSAvoidresistance to breaking

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The power storage device is divided into multiple layers including a flexible substrate, electrode layers, and protective coating layers. Each layer is designed to be thin and flexible while maintaining structural integrity, allowing the device to bend without breaking

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device uses composite material structures combining flexible substrates with electrode materials, electrolyte layers, and protective coatings. This multi-material approach enables both flexibility and mechanical strength to prevent breaking during wearability use

Inventive Principle:

Principle #40Composite materials

2Weight of moving object

If the device is made thinner and lighter for wearable applications, then the comfort and portability is improved, but the power storage capacity and structural strength is worsened

Engineering Contradiction:

ImproveweightVSAvoidstructural strength

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The power storage device employs thin-film electrode structures and flexible substrate materials to achieve reduced weight and thickness. The thin-film design maintains adequate power storage capacity while meeting wearable device requirements for lightness and thinness

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

Composite material structures with multiple thin layers provide both weight reduction and structural strength. The layered composite design ensures the device remains lightweight for wearable comfort while maintaining sufficient mechanical strength through the combined properties of different materials

Inventive Principle:

Principle #40Composite materials

3Length of moving object

If the device is made thinner for wearable applications, then the profile and comfort is improved, but the power storage capacity is worsened

Engineering Contradiction:

ImprovethicknessVSAvoidpower storage capacity

Core Design Contradiction:

Length of moving objectVSQuantity of substance

Solution Approach 1:

Thin-film electrode structures and multi-layer designs enable the device to achieve reduced thickness while maintaining adequate power storage capacity through optimized material distribution and layer configurations

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The device increases surface area in planar dimensions to compensate for reduced thickness. By expanding the active area of electrodes and optimizing the footprint, the device maintains power storage capacity despite thinner profile, meeting wearable requirements for both thinness and capacity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 provides a flexible, safe, and reliable power storage and light-emitting device that is less likely to break, reduces weight and thickness, and maintains functionality across various temperatures and environments.

Implementation Method 1

a power storage device including a battery unit and a member with rubber elasticity

Methodology Applied

Scientific EffectRubber elasticity: Elasticity

Data Source

PatentUS12406816B2Power storage device, light-emitting device, and electronic device

Publication Date: 2025.09.02 SEMICON ENERGY LAB CO LTD

AI summary

To provide a flexible, highly reliable power storage device or light-emitting device. The device includes a battery unit or a light-emitting unit and a member with rubber elasticity. The battery unit includes a secondary battery. The light-emitting unit includes a light-emitting element. The member with rubber elasticity is provided with a first projection and a second projection. The first projection and the second projection are arranged on a first surface of the battery unit or the light-emitting unit. The first projection and the second projection come in contact with each other when the power storage device is bent such that the first surface of the battery unit faces inward.