Pouch Cell Seal Folding with Movable Guides for Multi-Angle Accuracy
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Solution Overview
Problem
Existing folding apparatuses for pouch-shaped battery cells require multiple devices to achieve different folding angles, leading to low process efficiency and high equipment costs, and are prone to folding defects due to the flexibility difference between the middle and edge of the wing portion.
Innovation Solution
A single apparatus with a lower unit, upper unit, lower folding guide unit, and upper folding guide unit, featuring movable folding blocks and blades, allows for folding the sealed portion of pouch-shaped battery cells to 90°, 180°, 270°, and 360°, with independent operation of multiple folding blocks to accommodate varying cell lengths and reduce defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple folding apparatuses are used to achieve different folding angles (90°, 180°, 270°), then the folding process can be completed, but the equipment cost increases and process efficiency decreases
Solution Approach 1:
The folding apparatus is designed with a universal folding blade that can perform multiple folding operations (90°, 180°, 270°) through a single device. The blade is configured to sequentially fold the wing portion at different angles by adjusting its position and movement parameters, eliminating the need for multiple specialized folding apparatuses and thereby improving process efficiency while maintaining full folding angle capability
Solution Approach 2:
The folding blade is designed with dynamic movement capabilities, allowing it to adjust its position, angle, and movement speed during the folding process. This dynamic configuration enables the single blade to adapt to different folding angle requirements (90°, 180°, 270°) by changing its operational parameters in real-time, providing multi-functionality without requiring multiple static apparatuses
2Ease of manufacture
If the wing portion is folded, then the battery cell structure is completed, but folding defects occur due to flexibility difference between middle and edge of the wing portion
Solution Approach 1:
The folding blade is designed with different structural characteristics at different locations - the middle portion of the blade has different flexibility or pressure distribution compared to the edge portions. This local quality variation allows the blade to apply differentiated force to the wing portion during folding, compensating for the inherent flexibility differences in the wing material and ensuring accurate folding at the predetermined line without defects
Solution Approach 2:
The folding blade acts as an intermediary tool that mediates between the folding requirement and the wing portion's material properties. By carefully designing the blade's geometry, material, and movement characteristics, it transfers force in a controlled manner that accounts for the wing portion's flexibility variations, ensuring precise folding at the target location while preventing folding defects
3Quantity of substance
If the battery cell length increases to satisfy high energy density demand, then the energy density requirement is met, but the folding position becomes difficult to control at a fixed location
Solution Approach 1:
The folding apparatus employs dynamic positioning mechanisms that can adjust the folding blade's position and movement parameters in real-time. This allows the system to accommodate varying battery cell lengths while maintaining consistent folding at the predetermined location by dynamically adapting to each cell's specific dimensions rather than relying on fixed positioning for all cell sizes
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 enables efficient, accurate folding of sealed portions at fixed positions regardless of cell length, reducing equipment costs and minimizing folding defects by utilizing movable folding blocks and blades that adapt to the flexibility of the cell edges.
Implementation Method 1
an upper folding block (210) configured to perform horizontal reciprocation and upward and downward movement and to press the sealed portion (14) so as to be bent to a predetermined angle
Implementation Method 2
a lower folding guide unit (300) configured to perform upward and downward movement and to guide the sealed portion (14) so as to be bent to a predetermined angle
Data Source
AI summary
The present invention relates to a sealed portion folding apparatus and method for pouch-shaped battery cells, and more particularly to a sealed portion folding apparatus for pouch-shaped battery cells including a lower unit configured to allow a sealed portion to be seated thereon. The lower unit includes a lower folding block configured to perform horizontal reciprocation and upward and downward movement, an upper unit including an upper folding block configured to perform horizontal reciprocation and upward and downward movement and to press the sealed portion so as to be bent to a predetermined angle, a lower folding guide unit configured to perform upward and downward movement and to guide the sealed portion so as to be bent to a predetermined angle, and an upper folding guide unit configured to perform upward and downward movement and to guide the sealed portion so as to be bent to a predetermined angle.