Pouch Cell Folding Guide Line for Compact Sealing and Insulation
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Solution Overview
Problem
The sealing portion in pouch-type battery cells requires a certain width to block the electrode accommodation portion, which can increase the overall volume and adversely affect energy density, and the folding process can deteriorate insulation performance, leading to discarded cells.
Innovation Solution
An apparatus and method for forming a folding guide line in the terrace of battery cells, using a forming tool to create a groove-shaped guide and a heating press to stabilize the inner region, improving insulation performance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the sealing portion is increased to block the electrode accommodation portion, then the sealing performance is improved, but the overall volume of the battery cell increases, which adversely affects energy density
Solution Approach 1:
The terrace is divided into a sealing portion and a non-sealing portion, with the folding guide line formed only in the non-sealing portion. This segmentation allows the sealing portion to maintain adequate width for reliable sealing while the non-sealing portion is folded to reduce overall volume, resolving the contradiction between sealing performance and battery cell volume.
2Ease of manufacture
If the folding process is performed on a battery cell with low insulation level, then the folding process can be completed, but the insulation level is further deteriorated, which may lead to the battery cell being discarded
Solution Approach 1:
The folding guide line is formed in advance in the non-sealing portion of the terrace, creating a predetermined folding path. This preliminary action ensures that subsequent folding processes follow the pre-established guide, preventing insulation deterioration and enabling successful folding without compromising insulation level.
3Ease of operation
If a folding guide line is formed in the terrace to facilitate folding, then the ease of folding is improved, but the insulation performance may be deteriorated during the folding process
Solution Approach 1:
The folding guide line is formed only in the non-sealing portion of the terrace, not in the sealing portion. This local quality approach allows the folding process to be facilitated where needed while preserving the insulation performance and sealing integrity in critical areas, thus resolving the contradiction between folding ease and insulation performance.
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 enhances insulation performance, reduces defects, and maintains the quality of the folding portion, preventing insulation breakdown during the folding process.
Implementation Method 1
a heating press heating an inner region of the terrace, wherein the inner region of the terrace heated by the heating press may be disposed between the folding guide line and the electrode accommodation portion
Data Source
AI summary
The present disclosure provides an apparatus for forming a folding guide line including: a forming tool forming a folding guide line in a terrace disposed in at least a portion of a periphery of an electrode accommodation portion of a battery cell; and a heating press heating an inner region of the terrace, and the inner region of the terrace heated by the heating press is disposed between the folding guide line and the electrode accommodation portion.