Electrode Plate Cutting Supporter for Crack-Free Mixture Layers
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Solution Overview
Problem
Conventional electrode plate cutting devices cause cracks in the mixture layer of electrode plates during cutting, leading to the generation of foreign substances and potential separation of cracked portions.
Innovation Solution
An electrode plate cutting machine with an upper cutter, a lower cutter, and a stripper that supports the electrode plate upwardly during cutting, using a supporter with relatively low hardness compared to the cutters to disperse the load and prevent cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cutting devices are used to cut the electrode plate, then the cutting process can be completed, but cracks occur in the mixture layer and foreign substances are generated
Solution Approach 1:
A supporter is introduced as an intermediary component between the electrode plate and the lower cutter. The supporter has a specific hardness range (30-80 Shore D) that is softer than the cutters but harder than the electrode plate mixture layer, allowing it to act as a mediator that distributes cutting forces and prevents direct concentration of stress on the mixture layer, thereby preventing cracks while maintaining cutting efficiency
Solution Approach 2:
The hardness parameter of the supporter is specifically controlled within the range of 30-80 Shore D, which is softer than the upper and lower cutters but harder than the electrode plate mixture layer. This parameter optimization allows the supporter to deform slightly under cutting loads, distributing stress and preventing crack formation in the mixture layer while maintaining effective cutting action
2Stability of the object's composition
If the electrode plate is supported rigidly during cutting, then the plate remains stable, but cracks occur in the mixture portion due to concentrated load
Solution Approach 1:
The supporter's hardness is specifically designed to be within 30-80 Shore D, creating an intermediate stiffness that provides stable support while allowing slight deformation to distribute cutting loads. This parameter optimization enables the supporter to maintain electrode plate stability during cutting without concentrating stress on the mixture layer, thus preventing cracks
Solution Approach 2:
The supporter is made of a material with composite properties - harder than the electrode plate mixture layer but softer than the cutters. This composite hardness characteristic allows it to simultaneously provide stable support and distribute cutting forces, preventing mixture layer cracking while maintaining cutting effectiveness
3Strength
If the supporter has high hardness to support the electrode plate, then the plate is well-supported, but the load is concentrated and causes cracks in the mixture layer
Solution Approach 1:
The supporter's hardness is optimized to be within 30-80 Shore D, which is softer than the cutters but harder than the electrode plate mixture layer. This intermediate hardness allows the supporter to provide adequate supporting force while deforming slightly under cutting loads, distributing stress and preventing crack formation in the mixture layer
Solution Approach 2:
The supporter acts as a mechanical intermediary with intermediate hardness properties, positioned between the hard cutters and the soft electrode plate mixture layer. It absorbs and distributes cutting forces through controlled deformation, preventing direct transmission of concentrated loads to the mixture layer while maintaining support stability
Data Source
AI summary
The present disclosure provides an electrode plate cutting machine and an apparatus for manufacturing a secondary battery, which may prevent foreign substances or cracks from occurring in a mixture portion while an electrode plate is cut and prevent an active material from being transferred to a separator. The electrode plate cutting machine includes an upper cutter installed above a transport path of an electrode plate transported along the transport path, a lower cutter installed below the transport path to cut the electrode plate, and a stripper installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut, wherein the stripper includes a main body which provides a supporting force and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body.