Pouch Battery Edge Folding Apparatus with Adjustable Gap Spacers

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Solution Overview

Problem

Existing apparatuses for folding the edges of pouch-type secondary batteries require significant time and manpower, and their alignment is operator-skill dependent, leading to inconsistencies in the target cross-sectional shape and reliability issues such as jamming or tearing.

Innovation Solution

An apparatus with a forming means and support structure, including gap spacers, that allows for easy alignment and adjustment of forming rolls and a folding guide, enabling inexperienced operators to achieve a target cross-sectional shape by dividing the folding process into regions with specific angle adjustments and using rotatable rolls and a folding guide to support the edge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If forming rolls are individually aligned one by one, then the edge can be folded to have a target cross-sectional shape, but a large amount of time and manpower is required

Engineering Contradiction:
Improvetarget cross-sectional shapeVSAvoidalignment time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

A guide member is introduced as an intermediary component between the forming rolls and the support means. The guide member includes a guide surface that contacts the edge of the pouch-type secondary battery and guides it through the forming rolls. By adjusting the position of the guide member relative to the forming rolls, all forming rolls can be aligned simultaneously without individual adjustment, significantly reducing alignment time while maintaining the target cross-sectional shape.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of manufacture

If forming rolls are individually aligned by operators, then the apparatus can be set up, but alignment positions vary depending on operator skill, causing inconsistency in folding quality

Engineering Contradiction:
Improvesetup processVSAvoidalignment consistency
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The guide member is designed with a specific structure including a guide surface and positioning features that enable self-alignment. When the guide member is positioned, it automatically ensures correct alignment of all forming rolls with the edge of the battery pouch without requiring operator skill or judgment. This self-aligning mechanism eliminates variability caused by different operator skills and ensures consistent folding quality.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If multiple forming rolls are used to gradually fold the edge, then the edge can achieve the target cross-sectional shape, but the apparatus complexity increases

Engineering Contradiction:
Improvecross-sectional shapeVSAvoidnumber of forming rolls
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The forming process is divided into multiple stages with multiple forming rolls arranged in sequence, each roll progressively folding the edge to achieve the target cross-sectional shape. The guide member segments the control function by providing a guide surface that contacts the edge and directs it through each forming roll in sequence. This segmentation allows complex folding to be achieved through simple, repeatable units while maintaining overall system manageability.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP3876325B1Apparatus for folding pouch for secondary battery
Publication Date: 2022.11.02 CLEVER
  • EP3876325B1 patent drawingFigure 1
  • EP3876325B1 patent drawingFigure 2
  • EP3876325B1 patent drawingFigure 3

AI summary

There is provided an apparatus for folding a pouch for a secondary battery, the apparatus including: a forming means configured to gradually bend and fold an edge of a pouch-type secondary battery so that the edge has a target cross-sectional shape; a support means configured to support the forming means; and first to fourth gap spacers having various thicknesses, formed in a flat plate shape, and configured to be interposed between the forming means and the support means to align the forming means.