Separator Cutting for Electrode Assembly Alignment
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Solution Overview
Problem
Existing electrode assembly manufacturing methods face challenges in efficiently cutting separators to create non-standard shapes, leading to damage of separators, decreased productivity, and reduced yield rates due to misalignment and deformation issues.
Innovation Solution
A method involving the alternately stacking of electrode and separator materials to form basic unit sheets, followed by cutting the separator margins to create protrusions, allowing for efficient formation of electrode assemblies with non-standard shapes while preventing separator damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separators are cut separately before stacking with electrodes, then the separator can be shaped to non-standard forms, but the productivity decreases and yield rate reduces due to misalignment and deformation
Solution Approach 1:
The separator is cut to the desired non-standard shape before being stacked with electrodes. This preliminary action allows the separator to be pre-formed with chamfered corners, cut edges, or through holes, ensuring proper alignment during stacking and preventing misalignment issues that reduce productivity and yield rate.
Solution Approach 2:
The separator cutting process is divided into distinct operations: corner chamfering, edge cutting, and through hole formation. Each operation is performed separately on the separator before stacking, allowing precise control over the final separator geometry while maintaining manufacturing efficiency through systematic segmentation of the shaping process.
2Adaptability or versatility
If separators are cut to create non-standard shapes, then shape versatility is improved, but separator damage occurs during cutting
Solution Approach 1:
The separator is cut to non-standard shapes before stacking with electrodes, allowing the separator to be pre-formed with chamfered corners, cut edges, or through holes. This preliminary shaping ensures proper alignment during stacking and prevents misalignment issues that could cause separator damage during assembly.
Solution Approach 2:
A dedicated separator cutting and shaping process acts as an intermediary step between separator production and electrode assembly stacking. This intermediate process prepares the separator with the desired non-standard geometry while controlling cutting parameters to prevent separator damage, ensuring both shape versatility and separator integrity.
3Adaptability or versatility
If separators are stacked on electrodes after cutting, then shape customization is achieved, but alignment accuracy decreases and yield rate drops
Solution Approach 1:
The separator is cut to the desired non-standard shape and prepared with alignment features before being stacked with electrodes. This preliminary preparation ensures that the separator maintains proper alignment during the stacking process, preventing misalignment issues that would reduce manufacturing precision and yield rate.
Solution Approach 2:
The patent replaces manual or粗放 mechanical stacking with a more precise alignment system that ensures accurate positioning of the pre-cut separator relative to electrodes. This substitution of the stacking mechanism maintains alignment accuracy even when separators have complex non-standard shapes, preventing yield loss from misalignment.
Data Source
AI summary
Provided is an electrode assembly manufacturing method including a process of cutting a separator included in an electrode assembly to have a margin protruding from an electrode plate. The method includes a first process of manufacturing one type of basic unit sheets having a structure in which electrode materials and separator materials, which are the same in number, are alternately stacked, or two or more types of basic unit sheets having a structure in which electrode materials and separator materials, which are the same in number, are alternately stacked, and a second-A process of cutting a portion of a margin area of the separator materials, which are not covered with the electrode materials, such that the separator materials of the basic unit sheets protrude over a specific distance from edges of the electrode materials.