Electrode Sheet Folding Control via Rotating Conveying and Table
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Solution Overview
Problem
Conventional electrode sheet folding methods in battery production lead to lithium precipitation at the folding position, affecting the quality of laminated batteries.
Innovation Solution
An electrode sheet folding control method and device that involves controlling a conveying component and/or a folding table to rotate around respective axis centers, increasing the connection line distance between the conveying end and the folding start point to provide a receding space during folding, thereby reducing stress and bending at the folding position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode sheet folding method is used, then folding process is simple, but lithium precipitation occurs at folding position affecting battery quality
Solution Approach 1:
The patent applies dynamics by making the conveying component and folding table rotatable around their axis centers. This dynamic adjustment allows the connection line distance between the conveying end and folding start point to be increased, providing receding space during folding. This resolves the technical contradiction by enabling controlled movement that reduces stress and bending at folding positions, preventing lithium precipitation while maintaining manageable system complexity through coordinated rotation mechanisms.
2Manufacturing precision
If conveying component and folding table are controlled to rotate, then receding space is provided reducing stress at folding position, but control system complexity increases
Solution Approach 1:
The patent merges the conveying component and folding table into a coordinated system where both can rotate around their respective axis centers. This combination allows them to work together to provide receding space during folding, reducing stress and bending at folding positions. The merging of these two components into a unified control system achieves precise folding position control while managing the complexity through integrated operation.
Solution Approach 2:
The patent introduces rotational movement as an additional dimension of control beyond simple linear conveying. By allowing the conveying component and folding table to rotate around their axis centers, the system gains an extra degree of freedom to adjust the connection line distance and provide receding space. This dimensional change enables precise control of folding positions without excessively complicating the overall system.
3Stability of the object's composition
If connection line distance is increased to provide receding space, then bending and warping degree is reduced, but device operation complexity increases
Solution Approach 1:
The patent applies preliminary action by controlling the conveying component and/or folding table to rotate in advance, increasing the connection line distance before the folding process begins. This creates receding space that prevents excessive bending and warping of the electrode sheet during folding. By preparing the spatial configuration beforehand, the system maintains electrode sheet stability while keeping the actual folding operation straightforward.
Data Source
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AI summary
The present application relates to an electrode sheet folding control method and device, an electrode sheet folding device, and a battery production system. During folding of an electrode sheet group, a conveying component is controlled to operate, so as to drive the electrode sheet group to move towards a folding table. When a lamination region which is being folded starts to appear or is already present on the folding table, at least one of the conveying component and the folding table is controlled to rotate around respective axis centers, such that a connection line distance between a conveying end of the conveying component and a folding start point of the lamination region on the folding table that are located on the same side is increased. In this way, a receding space can be provided for folding of the lamination region, thus facilitating stress release of the lamination region during folding, reducing a pulling force of a lamination region in a folded state on a lamination region in a non-folded state, and reducing a bending and warping degree of the lamination region at a folding position. In this case, a formed laminated structure has a reduced probability of abnormal gaps at the folding position, thus effectively reducing the probability of lithium precipitation of an electrode sheet at the folding position, and improving quality of a laminated battery.