Electrode Plate Cutting with Groove Support to Minimize Burrs
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Solution Overview
Problem
The existing methods for manufacturing electrode plates, particularly using die roll cutters, result in suboptimal quality due to friction and burr formation, which can lead to short circuits and decreased battery performance.
Innovation Solution
A cutting device and method that employs a cutting blade to advance from the side of the first active material layer, cutting the current collector plate and first active material layer, while a support unit with a recessed groove peels the second active material layer, reducing friction and burr formation by aligning the groove with the cutting blade to form a peeled part, thereby improving the planarity of the cut surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a die roll cutter is used to punch the electrode material, then the electrode plates can be manufactured continuously, but friction and burr formation occur leading to suboptimal quality
Solution Approach 1:
The cutting process is segmented into two distinct stages: first, the cutting blade advances to cut the first active material layer and current collector plate; second, the support unit with groove peels the second active material layer. This segmentation allows each stage to be optimized independently, reducing overall friction and burr formation while maintaining continuous manufacturing capability.
Solution Approach 2:
The support unit with the groove acts as an intermediary element that facilitates the peeling of the second active material layer. The groove provides a controlled interface between the cutting blade and the electrode material, reducing direct friction and preventing burr formation at the cut surface while enabling continuous operation.
2Manufacturing precision
If the cutting blade advances deep to cut through all layers, then complete separation is achieved, but friction increases and burrs form on the cut surface
Solution Approach 1:
The cutting process is divided into two sequential actions: first, the cutting blade advances to cut the first active material layer and current collector plate; second, the support unit with groove peels the second active material layer. This segmentation achieves complete separation while limiting the cutting blade's advancement depth, thereby reducing friction and burr formation.
Solution Approach 2:
Instead of cutting through all layers directly with the cutting blade, the invention inverts the approach by using the support unit with groove to peel away the second active material layer after the initial cut. This reverse approach achieves complete separation while minimizing the harmful effects of deep cutting.
3Object-generated harmful factors
If the cutting blade advances shallow to reduce friction, then burr formation is reduced, but complete separation of all layers is not achieved
Solution Approach 1:
The cutting process is segmented into two stages: the cutting blade performs the initial cut at a shallow depth to reduce burr formation, and then the support unit with groove completes the separation by peeling the second active material layer. This ensures complete separation while maintaining low burr formation.
Solution Approach 2:
The support unit with groove serves as an intermediary that completes the separation process after the initial shallow cut. It provides the additional mechanism needed to achieve complete separation without requiring the cutting blade to advance deeply, thus preventing burr formation.
4Productivity
If a die roll cutter is used, then manufacturing efficiency is maintained, but the quality of electrode plates decreases due to friction
Solution Approach 1:
The cutting process is segmented into two distinct actions performed in sequence: cutting the first active material layer and current collector plate, then peeling the second active material layer using the support unit with groove. This segmentation reduces overall friction compared to traditional die roll cutting while maintaining continuous manufacturing efficiency.
Solution Approach 2:
The support unit with groove acts as an intermediary mechanism that reduces friction between the cutting blade and the electrode material. It enables efficient material removal while protecting the cut surface from excessive friction, thereby improving electrode plate quality without sacrificing manufacturing efficiency.
Data Source
AI summary
A cutting device is for cutting a continuous body of an electrode plate, the electrode plate including a current collector plate, a first active material layer, and a second active material layer, the cutting device including: a process unit that causes a cutting blade to cut the first active material layer and the current collector plate; and a support unit that supports the continuous body, has a groove at a position facing the cutting blade, and is configured to peel a portion of the second active material layer that overlaps the groove.