Battery Electrode Notching with Tensioned Tab Fixation
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Solution Overview
Problem
Existing notching apparatuses for secondary batteries face challenges in cutting the non-coating portion accurately due to the lack of fixation, leading to irregular cuts, as the non-coating portion is not securely held, causing movement and poor cutting quality.
Innovation Solution
A notching apparatus with a lower mechanism, stripper, and upper mechanism that includes a pressing member to increase tension force on the non-coating portion, using a pair of second strippers to fix and cut the non-coating surface, and a punch to cut the connection surface, ensuring stable fixation and cutting accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the non-coating portion is not fixed during cutting, then the coating portion can be processed freely, but the non-coating portion moves during cutting causing irregular cut surfaces
Solution Approach 1:
The non-coating portion is fixed to the lower plate before the cutting operation begins. The stripper presses the non-coating portion against the lower plate, securing it in position prior to the punch making contact, ensuring the material is stable during the cutting process
Solution Approach 2:
Different regions of the electrode are treated differently: the coating portion remains free and unpressured while the non-coating portion is specifically pressed and fixed by the stripper to the lower plate, allowing localized control over fixation without affecting the entire electrode structure
2Manufacturing precision
If the non-coating portion is pressed to increase tension force, then cutting accuracy is improved, but the complexity of the apparatus increases
Solution Approach 1:
The stripper serves multiple functions: it presses the non-coating portion against the lower plate to fix it, increases tension force on the non-coating portion to improve cutting accuracy, and prevents wrinkles during cutting. This multi-functionality reduces the need for separate components for each function
Solution Approach 2:
The stripper and lower plate are combined into an integrated fixing mechanism. The stripper is positioned above the lower plate and works in conjunction with it to secure the non-coating portion, merging the fixation function into a unified structure rather than separate components
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
The apparatus effectively prevents irregular cuts and improves cutting accuracy by enhancing the tension force on the non-coating portion, reducing wrinkles and ensuring precise cutting of the electrode tab.
Implementation Method 1
a pressing member pressing the non-coating portion disposed between the pair of second strippers to increase in tension force when the non-coating portion is cut by the punch
Implementation Method 2
a stripper comprising a first stripper disposed above a coating portion disposed on the lower mechanism to press the coating portion while descending toward the coating portion and a pair of second strippers disposed above a non-coating portion disposed on the lower mechanism to press and fix the non-coating portion
Data Source
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AI summary
The present invention comprises a notching apparatus for a secondary battery. The notching apparatus comprises: a lower mechanism comprising a die on which an electrode provided with a coating portion and a non-coating portion is disposed and a die holder to which the die is fixed; a stripper comprising a first stripper pressing the coating portion and a pair of second strippers pressing and fixing the non-coating portion; an upper mechanism comprising a punch provided between the pair of second strippers and provided with a cutting blade cutting the non-coating portion disposed between the pair of second strippers and a punch holder allowing the punch to move in a direction of the lower mechanism; and a pressing member pressing the non-coating portion disposed between the pair of second strippers to increase in tension force when the non-coating portion is cut by the punch.