Electrode Cutting and Deburring for Battery Separator Protection
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Solution Overview
Problem
The generation of burrs during the cutting process of coated electrode portions in secondary battery manufacturing can damage separators, leading to potential electrical shorts and reduced electrical energy capacity.
Innovation Solution
An electrode processing device equipped with a first cutter for cutting electrodes and a deburring unit with second cutters to remove burrs, utilizing guide rails and holders to ensure precise cutting and burr removal, followed by a pressing and winding process to maximize coated portion area and electrical energy capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cutter is used to cut the electrode, then the cutting process is simple, but burrs are generated on the cutting surface which can damage the separator
Solution Approach 1:
The cutting device is segmented into two distinct cutters: a first cutter that cuts the electrode and a second cutter that removes burrs from the cutting surface. This segmentation allows each cutter to perform its specific function optimally, with the first cutter creating the initial cut and the second cutter cleaning up the burrs without interfering with the primary cutting operation.
Solution Approach 2:
The second cutter performs preliminary burr removal immediately after the first cutter creates the cut, before the electrode is wound into the final assembly. This preliminary action prevents burrs from causing damage to the separator during the winding process, addressing the harmful effect before it can manifest.
2Productivity
If the electrode is cut without burr removal, then the manufacturing process is fast, but the coated portion area is reduced due to burr interference
Solution Approach 1:
The cutting operation is divided into two rapid sequential actions: cutting by the first cutter and burr removal by the second cutter. This segmentation allows both operations to be performed in quick succession, maintaining high productivity while ensuring the coated portion area is maximized by eliminating burrs that would otherwise reduce the effective area.
3Reliability
If burrs are removed after electrode cutting, then separator damage is prevented, but the device complexity increases
Solution Approach 1:
The cutting and burr removal functions are merged into a single integrated device operation. The first and second cutters work in close proximity and coordination, with the second cutter positioned to immediately address burrs created by the first cutter. This merging ensures separator integrity through effective burr removal while minimizing the overall complexity by combining functions in one system rather than requiring separate operations.
Data Source
Figure 1(a)~1(d)
Figure 2
Figure 3
AI summary
The present disclosure relates to an electrode processing device, and provides an electrode processing device including an electrode cutting unit including a first cutter that cuts an electrode; and a deburring unit including a second cutter that cuts a burr protruding from the cut electrode cutting surface in the cutting direction of the first cutter.