Pouch Case Terrace Step Forming Without Fold Wrinkles
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Solution Overview
Problem
Existing pouch-shaped battery case forming technologies result in increased thickness due to dents and wrinkles at the pouch folding portion when forming a terrace step, complicating the manufacturing process and increasing battery thickness.
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, featuring inclined surfaces to form a terrace step without dents or wrinkles, allowing for efficient pressing and sealing of the pouch-shaped battery case.
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 apparatus and process become complicated
Solution Approach 1:
The patent combines the terrace step formation process with the case forming process by integrating the terrace step forming cavity into the case forming die. This allows both the case body and terrace step to be formed simultaneously in a single pressing operation, eliminating the need for separate pressing operations and reducing manufacturing complexity while maintaining precise terrace step thickness control
2Reliability
If the terrace portion is bent after PCM is mounted, then the battery thickness increases, but adding insulating tape also increases overall battery thickness
Solution Approach 1:
The patent forms the terrace step with built-in insulation structure during the case forming process, before the PCM (protective cover membrane) is mounted. The terrace step is designed with an insulating structure that protrudes from the case body, providing necessary insulation without requiring additional insulating tape or increasing battery thickness
3Manufacturing precision
If side folding is performed to form a terrace step, then the side-folded region is widened, but this increases battery thickness
Solution Approach 1:
The patent segments the case forming process into two distinct cavities: a first cavity for forming the case body and a second cavity for forming the terrace step. This segmentation allows the terrace step to be formed as a separate, precisely controlled structure without widening the side-folded region, maintaining compact battery dimensions while achieving accurate terrace step geometry
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 prevents dents and wrinkles at the pouch folding portion, maintaining a reduced battery thickness and simplifying the manufacturing process by ensuring a flat, uniform deformation of the laminate sheet, thus enhancing the efficiency and quality of the pouch-shaped battery case production.
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 of the pouch-shaped case continuously connected to the lower receiving portion, which receives the electrode assembly, 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
A pouch-shaped case forming apparatus for forming a pouch-shaped case has a terrace step, wherein there are no dents or wrinkles at a pouch folding portion of the pouch-shaped case.