Electrode Sheet Rolling Press Short Stress Line Design
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Solution Overview
Problem
Current lithium battery electrode sheet manufacturing processes face issues with complex and heavy equipment, long stress lines leading to low rolling precision, and unstable quality due to separate devices for coating, drying, and rolling.
Innovation Solution
An electrode sheet rolling press with a short stress line featuring a simple structure, servo motor-driven rollers, and an integrated apparatus that combines unwinding, coating, drying, rolling, and winding steps to ensure consistent quality and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional rolling press structure with frame, intermediate pillars, and complex transmission mechanisms is used, then the equipment provides sufficient pressing force, but the structure becomes complicated, weight increases, and footprint enlarges
Solution Approach 1:
The patent merges the frame structure, intermediate pillars, and transmission mechanisms into an integrated pressing assembly where the upper and lower pressing rollers are directly connected through guide rails and adjusting mechanisms, eliminating the need for separate complex transmission components while maintaining sufficient pressing force
Solution Approach 2:
The pressing assembly is designed to perform multiple functions: the upper and lower pressing rollers provide pressing force, the guide rails ensure proper alignment, and the adjusting mechanism controls the gap between rollers, all within a single integrated structure that reduces overall complexity
2Manufacturing precision
If traditional rolling press with long stress line is used, then the equipment can process electrode sheets, but the stress condition of electrode sheet becomes poor and rolling precision decreases
Solution Approach 1:
The patent segments the pressing operation into a concentrated zone between the upper and lower pressing rollers, creating a short stress line where the electrode sheet is pressed locally rather than being subjected to stress over a long distance, thereby improving rolling precision
Solution Approach 2:
The guide rails act as intermediaries that ensure the upper and lower pressing rollers maintain proper alignment and parallelism, enabling the short stress line design to achieve high rolling precision by mediating the relationship between the pressing components
3Productivity
If separate devices for coating, drying, and rolling are used, then each process can be performed independently, but the overall production efficiency decreases and quality consistency becomes difficult to maintain
Solution Approach 1:
The patent combines the coating device, drying device, and rolling press into a single integrated apparatus where the electrode sheet passes through coating, drying, and rolling processes in sequence without manual intervention, improving production efficiency while maintaining quality consistency through controlled parameters
Solution Approach 2:
The integrated apparatus enables continuous processing where the electrode sheet undergoes coating, drying, and rolling in an uninterrupted sequence, eliminating idle time between operations and maintaining consistent quality through continuous controlled action
Data Source
AI summary
A short stress path-type electrode sheet rolling machine and an integrated machine equipment for manufacturing lithium battery electrode sheets, whereby the rolling machine comprises: an upper roller mechanism, a lower roller mechanism, an upper bearing base, a lower bearing base and a roller-gap adjusting mechanism; the upper roller mechanism is connected to the upper bearing base, and the lower roller mechanism is connected to the lower bearing base; the upper bearing base and the lower bearing base are connected by means of a guide shaft; the roller-gap adjusting mechanism is connected to the upper roller mechanism so as to adjust a roller gap between the upper roller mechanism and the lower roller mechanism. The rolling machine has a simpler and more reliable structure, has a shorter stress return path when performing electrode sheet rolling, and may improve rolling precision and rolling quality.