Pouch Shaping Structure for Wrinkle-Free Laminate Corners
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pouch-shaped batteries often develop wrinkles during manufacturing, leading to damage and aesthetic issues due to uneven pressure distribution during the shaping process, and existing solutions complicate the apparatus structure.
Innovation Solution
A pouch shaping apparatus with a core member positioned between the upper support and support plate, which includes a movable stripper and punch, and features core members at the corners to distribute tension evenly, reducing wrinkles while maintaining a simpler structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional punch and stripper apparatus is used to shape the laminate sheet, then the receiving portion can be formed, but wrinkles are generated at the corner parts due to uneven pressure distribution
Solution Approach 1:
The invention introduces core members specifically at the corner parts of the support plate, creating localized structural differences. These core members provide additional support and modify the pressure distribution pattern at the critical corner regions, preventing wrinkles without affecting the overall shaping process. This local modification approach targets the specific problem area while maintaining the simplicity of the conventional apparatus.
2Manufacturing precision
If control members are added to move the stripper upwards during punching to reduce pressing force, then wrinkle generation is prevented, but the apparatus structure becomes complicated
Solution Approach 1:
The invention segments the support plate by adding discrete core members at the corner parts, rather than implementing a complex control mechanism for the entire stripper. This segmentation approach simplifies the overall apparatus structure while effectively addressing the wrinkle problem at specific critical locations. The core members are simple structural additions that do not require additional control systems.
Solution Approach 2:
The core members automatically perform the function of distributing pressure evenly at the corner parts during the punching process. They passively provide structural support and modify the pressure distribution without requiring active control, sensors, or additional actuators. This self-service approach eliminates the need for complex control members while achieving the desired wrinkle prevention.
3Shape
If the laminate sheet is pressed with high force to form the receiving portion, then the shaping is effective, but wrinkles are generated at the angular points
Solution Approach 1:
The core members create local structural differences at the corner parts, modifying how pressure is distributed in these specific regions. The increased local rigidity and support at the corners allow the laminate sheet to be pressed with sufficient force to form the receiving portion without generating wrinkles at the angular points, where the core members provide additional structural integrity.
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 apparatus effectively minimizes wrinkle formation at the corners of pouch-shaped batteries, enhancing durability and aesthetics without increasing the apparatus' complexity or volume, and allows for easy size adjustments.
Implementation Method 1
core members at the corners to distribute tension evenly, reducing wrinkles
Data Source
AI summary
A pouch shaping apparatus includes a support unit configured to allow a laminate sheet to be disposed on an upper surface thereof, a stripper located above the support unit, the stripper configured to be movable upwards and downwards and to press and fix an outer periphery of the laminate sheet disposed on the upper surface of the support unit when being moved downwards, and a punch located above the support unit, the punch configured to be movable upwards and downwards and to form an electrode assembly receiving portion in the laminate sheet while being inserted into a shaping portion located at the center of the support unit when being moved downwards. The support unit includes an upper support and a support plate, and the pouch shaping apparatus includes a core member located between the upper support and the support plate, the core member having a predetermined thickness.