Wound Electrode Body Manufacturing With Selective Adhesion Contact
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Solution Overview
Problem
The existing methods for manufacturing wound electrode bodies with adhesion layers on electrode and separator sheets face issues such as adhesion to rollers, reduced adhesive strength, and decreased productivity due to misalignment and foreign matter adhesion, which hinder efficient manufacturing processes.
Innovation Solution
A method and device for manufacturing wound electrode bodies where the sheets with adhesion layers are designed to have regions with and without the adhesion layer, with rollers contacting only the regions without the adhesion layer to prevent adhesion and maintain adhesive strength, ensuring proper alignment and increased productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an adhesion layer is arranged on the surface of the electrode sheet or separator sheet to prevent misalignment, then misalignment prevention is improved, but adhesion to rollers occurs and productivity decreases
Solution Approach 1:
The adhesion layer is applied selectively to specific regions of the electrode sheet or separator sheet rather than the entire surface. This local application ensures misalignment prevention at the bonding interface while leaving other regions free from adhesive properties that would cause roller adhesion, thus resolving the contradiction between alignment precision and manufacturing productivity
2Strength
If an adhesion layer is arranged on the sheet, then sheet bonding is improved, but foreign matter adhesion increases reducing productivity
Solution Approach 1:
The adhesion layer is applied only to the necessary bonding regions between sheets, minimizing the total adhesive surface area exposed during manufacturing. This localized approach maintains effective sheet bonding while reducing the opportunities for foreign matter to adhere, thereby preventing productivity loss
Data Source
AI summary
A method for manufacturing a wound electrode body disclosed herein includes preparing a positive electrode sheet, a negative electrode sheet, and a separator sheet, conveying each of the prepared sheets, and winding each of the conveyed sheets around a core. In the preparing, an adhesion layer is arranged on at least one sheet of the sheets. In the conveying, the sheet on which the adhesion layer is arranged is conveyed such that a region where the adhesion layer is not arranged contacts a roller.