Battery Electrode Notching Die Layout to Prevent Burrs and Sticking
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Solution Overview
Problem
Existing notching processes for secondary battery electrode plates often result in defects such as sticking or burrs, which can compromise the quality and performance of the batteries.
Innovation Solution
A notching apparatus is designed with a specific configuration that includes a lower body supporting the electrode plate, an upper body with a punch that moves vertically, and a die with strategically arranged punch holes to prevent sticking and burrs by optimizing the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional puncher is used to notch the electrode plate, then the notching process can be performed, but defects such as sticking or burrs occur during punching
Solution Approach 1:
The die is divided into multiple sections with different punch hole configurations. The first punch hole has a larger diameter than the second punch hole, creating a stepped structure that allows the punch to cut through the electrode plate in stages, preventing burrs and sticking defects
Solution Approach 2:
Different regions of the die have different punch hole diameters tailored to specific cutting needs. The first punch hole with larger diameter is used for initial cutting where more material removal is needed, while the second punch hole with smaller diameter is used for precision cutting, optimizing cutting quality at each location
2Manufacturing precision
If the punch hole diameter is uniformly small, then precision is improved, but cutting efficiency and consumption efficiency decrease
Solution Approach 1:
The cutting process is segmented into two stages using two different punch hole diameters. The first stage uses a larger punch hole for rapid material removal, and the second stage uses a smaller punch hole for precision cutting, combining both efficiency and precision in a single notching operation
Solution Approach 2:
The first punch hole with larger diameter performs preliminary cutting action to remove the bulk of the material quickly, preparing the workpiece for the second punch hole which then completes the precision cutting, thereby improving overall consumption efficiency while maintaining precision
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 defects like sticking and burrs, improving the cutting quality and consumption efficiency of the electrode plate, thereby enhancing the overall performance and reliability of secondary batteries.
Implementation Method 1
a punch on the upper body, insertable into the punch hole as the upper body moves downward, and configured to cut the second area
Data Source
AI summary
A notching apparatus for a secondary battery includes a lower body configured to support an electrode plate which includes a first area coated with an active material and a second area not coated with the active material, the electrode plate to be transferred in a first direction, an upper body configured to vertically move above the lower body, a die on the lower body and arranged to face the second area, a punch hole passing through the die and including a first punch hole, a second punch hole, and a third punch hole sequentially arranged in the first direction, and a punch on the upper body, insertable into the punch hole as the upper body moves downward, and configured to cut the second area.