Tapered Pattern Hole for Cleaner Electrode Laser Notching
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Solution Overview
Problem
Existing electrode manufacturing devices using laser notching suffer from foreign substances (spatters) accumulating and sticking around the pattern hole of the pattern jig, damaging the electrode sheet.
Innovation Solution
An electrode manufacturing device with a pattern jig featuring a panel with a pattern hole that widens from the front to the rear along the laser beam direction, an inclined wall forming an interior angle of 15° to 80°, and a foreign substance adhesion prevention coating layer with a low friction coefficient and surface roughness, is used to prevent accumulation of spatters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pattern hole structure is used, then the laser notching process can be performed, but foreign substances (spatters) accumulate and stick around the pattern hole damaging the electrode sheet
Solution Approach 1:
The pattern hole is designed with an asymmetric tapered structure where the diameter at the rear end is larger than at the front end. This asymmetric geometry prevents spatters from accumulating by creating a slope that directs foreign substances away from the electrode sheet contact area, thereby resolving the contradiction between maintaining notching functionality and preventing foreign substance accumulation
Solution Approach 2:
Instead of trying to prevent spatter generation at the source, the invention inverts the approach by designing the pattern hole to actively shed spatters after they are generated. The tapered structure works in reverse of conventional thinking by allowing spatters to enter but preventing them from sticking, thus protecting the electrode sheet without interfering with the notching process
2Object-affected harmful factors
If the pattern hole is enlarged to prevent spatter accumulation, then foreign substance adhesion is reduced, but the structural integrity and support function of the pattern jig may be compromised
Solution Approach 1:
The pattern hole exhibits local quality variation through its tapered structure - the front end has a smaller diameter for precise laser beam entry and electrode support, while the rear end has a larger diameter for spatter shedding. This localized variation in dimensions allows the hole to simultaneously maintain structural integrity where needed and prevent adhesion where critical, resolving the contradiction between strength and adhesion prevention
3Ease of manufacture
If a vertical wall structure is used in the pattern hole, then manufacturing is simpler, but foreign substances easily accumulate and stick
Solution Approach 1:
The invention changes the geometric parameters of the pattern hole from a uniform cylindrical shape with vertical walls to a tapered cylinder with inclined walls. This parameter change - specifically the introduction of a gradual diameter increase from front to rear - maintains manufacturability through standard machining processes while fundamentally preventing spatter accumulation by eliminating vertical surfaces where adhesion occurs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents foreign substances from accumulating and sticking around the pattern hole, reducing damage to the electrode sheet during the laser notching process.
Implementation Method 1
a laser irradiation part irradiating the electrode sheet with a laser beam to perform the electrode notching process
Data Source
AI summary
An electrode manufacturing device includes a transfer part, a laser irradiation part, and a pattern jig. The transfer part continuously transfers an electrode sheet in order to perform an electrode notching process. The laser irradiation part irradiates the electrode sheet with a laser beam to perform the electrode notching process. The pattern jig is positioned at a portion facing the laser irradiation part with the electrode sheet interposed therebetween to support the electrode sheet. The pattern jig includes a panel having a pattern hole through which the laser beam that has notched the electrode sheet passes, and the pattern hole has a structure which becomes wider from the front toward the rear along a laser beam traveling direction.