Pouch Case Terrace-Step Forming Without Fold Wrinkles
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Solution Overview
Problem
Existing methods for forming pouch-shaped cases with a terrace step often result in dents or wrinkles at the pouch folding portion, leading to increased battery thickness and manufacturing complexity.
Innovation Solution
A pouch-shaped case forming apparatus with a forming apparatus base and dies designed to create a continuous receiving portion for the electrode assembly, eliminating the need for separate pressing steps and thereby preventing dents and wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a terrace step is formed by separate pressing after electrode assembly is received, then a terrace step with predetermined thickness is formed, but the manufacturing process becomes complicated and requires additional apparatus
Solution Approach 1:
The patent combines the terrace step forming operation with the electrode assembly receiving operation into a single integrated pressing step. The pressing apparatus simultaneously performs both functions, eliminating the need for separate pressing steps and reducing manufacturing process complexity while maintaining precise terrace step thickness control
2Length of moving object
If the terrace portion is bent after PCM is mounted, then the battery thickness can be reduced, but dents or wrinkles occur at the pouch folding portion and thickness increases
Solution Approach 1:
The patent forms the terrace step in advance during the case forming process, before the electrode assembly is received and before PCM mounting. This preliminary formation of the terrace step prevents subsequent bending operations that would cause dents or wrinkles, while still achieving the desired battery thickness reduction
3Shape
If side folding is performed to form a terrace step, then a terrace step is formed, but the side-folded region is widened
Solution Approach 1:
The patent replaces the mechanical side folding process with a pressing operation that forms the terrace step by compressing the laminate sheet in a controlled manner. This substitution eliminates the widening of the side-folded region while still achieving proper terrace step formation
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 enables the formation of pouch-shaped cases with a terrace step without dents or wrinkles, thereby maintaining battery thickness and simplifying the manufacturing process.
Implementation Method 1
a forming apparatus base provided with recesses to manufacture a lower receiving portion of a pouch-shaped case configured to receive an electrode assembly therein and an upper receiving portion continuously connected to the lower receiving portion, by pressing
Implementation Method 2
contact portions between the cover and the body are coupled to each other by thermal fusion
Data Source
AI summary
The present invention relates to a pouch-shaped case forming apparatus for forming a pouch-shaped case having a terrace step, wherein there are no dents or wrinkles at a pouch folding portion of the pouch-shaped case, a method of manufacturing a pouch-shaped case using the same, and a pouch-shaped case manufacturing using the forming apparatus.