Electrode Assembly Round-Region Pressing for Stable Molding
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Solution Overview
Problem
Existing press molding technologies face challenges in stabilizing the manufacturing process of the round portion in the uncoated region of a jelly roll-type electrode assembly, leading to inconsistent quality.
Innovation Solution
A press mold apparatus with a base mold and movable mold, equipped with first and second pressing portions and tape members made of heat-resistant Teflon, is used to press the round portion of the electrode assembly, ensuring stable molding through the insertion grooves and detachable fixing of pressing blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional press molding technology is used, then the manufacturing process is simple, but the press molding stability of the round portion is poor leading to inconsistent quality
Solution Approach 1:
The pressing blocks are equipped with pressing portions having specific shapes (e.g., arc-shaped, flat, or inclined surfaces) that correspond to the round portion geometry, providing localized adaptive pressing force distribution to achieve stable press molding of the round portion while maintaining overall process simplicity
Solution Approach 2:
The mold structure is divided into base mold and movable mold with separate pressing blocks that can be independently configured with different pressing portion shapes, allowing optimized local pressing for the round portion without complicating the entire mold system
2Manufacturing precision
If pressing force is increased to improve molding quality, then the molding precision improves, but contact damage to the electrode assembly increases
Solution Approach 1:
The pressing portions are designed with specific surface characteristics (arc-shaped, flat, or inclined) that distribute the pressing force appropriately across the round portion, achieving consistent molding without concentrating excessive force that would cause contact damage
Solution Approach 2:
The pressing blocks act as intermediary elements between the movable mold and the electrode assembly, mediating the pressing force through their specifically shaped surfaces to achieve molding consistency while preventing direct damage contact
Data Source
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AI summary
A press mold apparatus for manufacturing an electrode assembly in which a round portion is formed in an uncoated region, the press mold apparatus for manufacturing the electrode assembly comprising: a base mold (10) including: a seating surface (12) configured to seat the electrode assembly and a first pressing portion (20) configured to press a first surface of the round portion of the electrode assembly; a movable mold (30) configured to be lifted up and down above the base mold and including: a pressing surface (32) configured to press the electrode assembly, and a second pressing portion (50) configured to press a second surface opposing the first surface of the round portion of the electrode assembly; and a driver (40) configured to drive the movable mold (30).