Electrode Transport Drum With Variable-Speed Holding Heads
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Solution Overview
Problem
Existing technologies face challenges in efficiently producing layered electrode assemblies for lithium ion secondary batteries, particularly in supplying and layering quadrangular electrode assemblies effectively.
Innovation Solution
A transport drum with multiple holding heads that rotate around a common center axis, equipped with cutting units to cut quadrangular electrode assemblies, and capable of changing relative velocities to adjust the supply and layering process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a transport device supplies electrodes to a layering unit, then the electrode assembly can be produced, but the supply velocity must be slower than transport velocity which reduces productivity
Solution Approach 1:
The transport drum allows dynamic velocity adjustment of multiple holding heads independently. Each holding head can change its transport velocity dynamically to match the layering unit's processing speed while maintaining overall high productivity through parallel operation of multiple heads.
Solution Approach 2:
The transport drum divides the electrode supply into multiple independent holding heads, each capable of independent velocity control. This segmentation allows different heads to operate at optimized velocities for their specific tasks, with some heads moving electrodes faster while others synchronize with the layering unit.
2Productivity
If multiple electrodes are pushed simultaneously toward the layering portion, then layering efficiency improves, but control complexity increases
Solution Approach 1:
The transport drum serves multiple functions: it transports electrodes, stores multiple electrodes simultaneously on different holding heads, controls their individual velocities, and coordinates their delivery to the layering unit. This multi-functionality consolidates what would otherwise require separate devices into a single integrated system.
3Manufacturing precision
If electrode assemblies are cut to desired sizes, then manufacturing precision improves, but additional processing time is required
Solution Approach 1:
The cutting operation is performed in advance on the electrode assemblies before they are loaded onto the holding heads. This preliminary cutting ensures precise dimensions are achieved beforehand, and the pre-cut electrodes are then simply transported and layered without requiring additional cutting time during the assembly process.
Data Source
AI summary
A laminated electrode body manufacturing device is provided with: a negative electrode cutting drum for cutting a negative electrode veneer to a first width to create a negative electrode plate, a negative electrode heating drum; a positive electrode cutting drum for cutting a positive electrode veneer to a second width to create a positive electrode plate, a positive electrode heating drum; and a bonding drum for arranging the negative electrode plate on a first separator veneer, arranging a second separator veneer thereon, arranging the positive electrode plate thereon, and bonding the same. The drums each include a plurality of holding heads arranged in the circumferential direction of the drum, wherein the plurality of holding heads hold a rectangular electrode body and rotate about a common central axis, and the speed of movement of each holding head in the circumferential direction can be changed relative to the adjacent holding head.