Electrode Assembly Winding with Pre-Laminated Separator Complex
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Solution Overview
Problem
The production efficiency and yield of electrode assemblies in battery cell manufacturing are hindered by the difficulty in aligning and winding electrode plates and separators, leading to misalignment and low productivity.
Innovation Solution
A manufacturing device and method that pre-laminates the first electrode plate, first separator, and second separator into an integral complex, which is then wound with a second electrode plate, reducing the need for auxiliary mechanisms and improving alignment precision, thereby simplifying the device structure and increasing production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode plates and separators are aligned and wound separately, then the winding mechanism can process individual components, but the alignment precision deteriorates and the device complexity increases
Solution Approach 1:
The process is segmented into two stages: first, the compounding mechanism laminates the first electrode plate with first and second separators to form a pre-aligned complex; second, the winding mechanism processes this complex together with the second electrode plate. This segmentation allows the compounding mechanism to handle alignment precision while the winding mechanism focuses on the winding operation, resolving the contradiction between alignment precision and device complexity.
Solution Approach 2:
The compounding mechanism performs preliminary lamination of the first electrode plate with separators before the winding process. This preliminary action pre-aligns the components, so that when they enter the winding mechanism, the alignment is already established, improving alignment precision without requiring the winding mechanism to perform complex alignment operations.
2Productivity
If multiple electrode plates and separators are processed individually through the winding mechanism, then each component can be handled separately, but the production efficiency deteriorates due to increased processing time
Solution Approach 1:
The compounding mechanism merges the first electrode plate with the first and second separators into a single integrated complex through lamination. This merging allows the winding mechanism to process the complex as one unit together with the second electrode plate, reducing the number of separate processing steps and improving production efficiency by eliminating repeated alignment and handling operations.
Solution Approach 2:
The compounding mechanism performs preliminary lamination to create an integrated complex before winding. This preliminary integration reduces the processing time in the winding mechanism by eliminating the need to handle and align multiple separate components during winding, thus improving overall production efficiency.
3Ease of manufacture
If the first electrode plate is conveyed without being fixed to separators, then the conveying process is simpler, but the first electrode plate is prone to warping, folding, or wrinkling
Solution Approach 1:
The compounding mechanism merges the first electrode plate with the first and second separators through lamination, creating a mechanically integrated complex. This merging provides structural support to the first electrode plate during conveying, preventing warping, folding, or wrinkling, while the integrated nature of the complex simplifies the conveying process by eliminating the need for separate fixation mechanisms.
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
This approach enhances the yield and precision of electrode assembly production by reducing the complexity of alignment and the risk of warping or wrinkling, while also simplifying the manufacturing process and improving safety performance by minimizing dust exposure.
Implementation Method 1
a compounding mechanism provided downstream of the first electrode plate feeding mechanism, the first separator feeding mechanism, and the second separator feeding mechanism, the compounding mechanism being used for sequentially laminating and compounding the first separator, the first electrode plate, and the second separator into a first electrode plate complex
Data Source
AI summary
A manufacturing device for an electrode assembly comprises a first electrode plate feeding mechanism for conveying a first electrode plate, a first separator feeding mechanism for conveying a first separator, a second separator feeding mechanism for conveying a second separator, and a compounding mechanism provided downstream the first electrode plate feeding mechanism, the first separator feeding mechanism, and the second separator feeding mechanism. The compounding mechanism is used for sequentially laminating and compounding the first separator, the first electrode plate, and the second separator into a first electrode plate complex. The manufacturing device further comprises a second electrode plate feeding mechanism for conveying a second electrode plate having opposite polarity than the first electrode plate, and a winding mechanism provided downstream the compounding mechanism and the second electrode plate feeding mechanism and used for winding the first electrode plate complex and the second electrode plate to form an electrode assembly.