Flexible Battery Package with Elastomer Cushioning

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Solution Overview

Problem

Conventional bag-type batteries lack flexibility and durability, leading to packaging issues, such as breakage and defective contact during bending, which limits their use in flexible electronic devices.

Innovation Solution

A package design with arc-shaped concave and convex parts and elastomers that absorb stress during bending, ensuring the battery's integrity and maintaining contact between the cell and package surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional bag-type batteries are used, then manufacturing is simple, but the battery lacks flexibility and cannot withstand repeated bending

Engineering Contradiction:

ImproveflexibilityVSAvoiddurability during bending

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent uses a flexible pouch package with elastomers embedded in concave parts to create a battery that can bend repeatedly without failure. The elastomers absorb stress during bending, preventing package breakage and maintaining battery integrity, thus achieving both flexibility and reliability

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The elastomers are pre-installed in the concave parts of the package structure to provide cushioning before bending occurs. This beforehand cushioning absorbs the stress generated during bending operations, preventing package breakage and interface separation that would otherwise occur with conventional rigid packaging

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If multiple small bag-type batteries are arranged to form a flexible strap battery, then flexibility is improved, but process complexity and cost increase due to packaging operations on multiple cells

Engineering Contradiction:

ImproveflexibilityVSAvoidpackaging process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple battery cells into a single integral flexible battery structure with a unified pouch package. This combining approach eliminates the need for separate packaging operations on multiple cells, reducing process complexity and cost while maintaining flexibility through the integrated elastomer design

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If single small bag-type batteries are used, then manufacturing is simple, but the battery cannot be bent to a sufficient degree due to width limitation

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidbending degree

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent segments the battery into multiple cells arranged in series within a single flexible pouch, allowing the overall battery to bend to greater degrees than a single cell could achieve. The elastomers in concave parts of the package accommodate the bending stress across the segmented structure, maintaining both manufacturing simplicity and enhanced bending capability

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If conventional package structures are used, then manufacturing is simple, but gaps form during repeated bending causing defective contact between interfaces

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidcontact reliability during bending

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The flexible pouch package with integrated elastomers maintains continuous contact between battery interfaces during bending. The elastomers deform with the package structure, preventing gap formation at interfaces and ensuring reliable electrical contact throughout the battery's operational life

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The elastomers are pre-positioned in concave parts of the package to provide cushioning that maintains interface contact during bending. This beforehand cushioning prevents the separation and defective contact that occurs with conventional rigid packages during repeated bending operations

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 effectively buffers stress during bending, preventing breakage and maintaining battery performance, while optimizing space utilization and reducing process complexity.

Implementation Method 1

a first elastomer disposed in the first concave part... effectively buffers stress during bending

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11223083B2Package and battery

Publication Date: 2022.01.11 NINGDE AMPEREX TECHNOLOGY LTD

AI summary

The present application provides a package and a battery, the package comprises a first surface, the first surface is provided with a first concave part and a first convex part which are connected with each other, the package further comprises an first elastomer, and the first elastomer is disposed in the first concave part. The purpose of the present application is to at least enable a battery to be protected well during the bending process of the battery.