Pole Piece Slitting Rollers for Wrinkle and Stress Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production process of pole pieces in batteries often results in wrinkling issues due to inconsistent stress distribution during slitting, leading to increased rejection rates and reduced product quality, especially after lithium replenishment.
Innovation Solution
A pole piece forming apparatus is designed with a wrinkle removing device featuring opposing rollers with varying diameters and a heat conductive medium, which redistributes stress and maintains optimal temperature for efficient wrinkle removal and lithium embedding, integrated with lithium replenishment, deflection correction, burr treatment, and glue application mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the master pole piece is slit into multiple pole pieces, then productivity is improved, but wrinkling occurs due to inconsistent stress distribution
Solution Approach 1:
The wrinkle removing device is positioned between the slitting device and winding devices to perform wrinkle removal immediately after slitting and before winding. This preliminary action prevents wrinkles from developing during subsequent processing, resolving the contradiction between maintaining surface quality and improving productivity through batch slitting operations
2Manufacturing precision
If uniform rolling pressure is applied to remove wrinkles, then manufacturing precision is improved, but the structure becomes overly complex
Solution Approach 1:
The first roller features a variable cross-sectional structure where the rolling surface diameter changes along the rolling direction, creating different rolling pressures in different zones. This local quality variation allows the single roller to provide differentiated pressure distribution (higher at edges, lower at center) without requiring multiple complex rollers, thus improving wrinkle removal effectiveness while controlling device complexity
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 reduces wrinkling, improves yield, and enhances safety by ensuring uniform stress distribution and controlled temperature processing, thereby improving the quality and reliability of the battery production process.
Implementation Method 1
a heat conductive medium, which redistributes stress and maintains optimal temperature for efficient wrinkle removal and lithium embedding
Data Source
AI summary
The present application provides a pole piece forming apparatus, which may include an incoming structure, a slitter, a plurality of winders and a wrinkle remover. The incoming structure may provide a master pole piece. The slitter may slit the master pole piece into a plurality of pole pieces. The winders may pull the transport of the pole pieces, respective winding devices may wind one corresponding pole piece, and the slitter may be disposed between the incoming structure and the winders. The wrinkle remover may be arranged between the slitter and the winders. The wrinkle remover may include a first roller and a second roller that may be provided opposite to each other, the first roller may include a first rolling part, and the first rolling part and the second roller may be used for rolling an edge of a slitting edge of the pole piece.