Two-Stage Electrode Plate Cutting for Burr-Free Connection Bodies
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Solution Overview
Problem
Existing methods for manufacturing electrode plates, such as using die roll cutters, result in reduced quality due to burrs and electrode active material layer detachment, leading to potential short circuits and decreased battery performance.
Innovation Solution
A cutting device and method that involves forming an incision in the first active material layer using a first cutting blade and then cutting through the second active material layer and current collector plate using a second cutting blade, minimizing friction and burr formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a die roll cutter is used to punch the electrode material, then the cutting process can be completed in one step, but burrs are generated and the electrode active material layer detaches, reducing quality
Solution Approach 1:
The cutting process is divided into two distinct stages: first forming an incision in the active material layer without penetrating the current collector plate, then completing the cut through the current collector plate. This segmentation allows each stage to be optimized independently, preventing burr formation and material detachment while maintaining high cutting efficiency.
Solution Approach 2:
The first cutting blade performs a preliminary action by forming an incision in the active material layer before the second cutting blade completes the cut through the current collector plate. This preliminary incision reduces the resistance for the subsequent cutting operation while maintaining surface quality and preventing material detachment.
2Speed
If the cutting blade advances through the entire electrode plate in one motion, then the cutting speed is high, but friction increases causing burrs and material detachment
Solution Approach 1:
The cutting operation is segmented into two phases: the first blade forms an incision without penetrating the current collector plate, reducing friction on the active material layer; the second blade then completes the cut through the current collector plate. This segmentation maintains high cutting speed while minimizing friction-induced harmful effects.
Solution Approach 2:
The first cutting blade acts as an intermediary that creates an incision in the active material layer, preparing the path for the second cutting blade. This intermediary action reduces the friction and resistance that would otherwise cause burrs and material detachment during the complete cutting process.
Data Source
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AI summary
A cutting device 1 cuts a connection body 4 of an electrode plate 2 having: a current collector plate 12 that has a first surface 12a and a second surface 12b facing away from each other; a first active material layer 14 that is laminated on the first surface 12a; and a second active material layer 16 that is laminated on the second surface 12b. The cutting device 1 comprises: a first processing part 8 that forms a cut 28 in the first active material layer 14 by advancing a first cutting blade 26 from the first active material layer 14 side to a position before the current collector plate 12; and a second processing part 10 that cuts the connection body 4 by advancing a second cutting blade 32 from a position on the second active material layer 16 side facing the cut 28 to past the current collector plate 12.