Electrode Plate Die Cutting with Thickness-Direction Vibration Constraint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The forming quality of electrode plates in lithium-ion batteries is compromised due to unstable cutting during the process of forming tabs, resulting from vibrations caused by conveying and cutting forces, which can lead to incomplete cuts or damage.
Innovation Solution
A die-cutting device with first and second limiting members on either side of the electrode plate in the thickness direction, along with a conveying mechanism and cutting mechanisms, to stabilize the electrode plate and ensure precise cutting by limiting vibrations, and a guide mechanism to compensate for deformations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser cutting is used to cut the uncoated region to form tab and scrap portion, then cutting speed and efficiency are improved, but electrode plate vibration causes unstable cutting and incomplete cuts
Solution Approach 1:
The patent changes the physical state and parameters of the electrode plate by introducing limiting members that apply mechanical constraint forces, altering the vibration characteristics and positional stability parameters during laser cutting to achieve stable cutting at high speed
Solution Approach 2:
The limiting members act as intermediary elements between the electrode plate and the cutting process, providing mechanical support and vibration damping without interfering with the laser cutting operation, thereby enabling both high speed and high precision
2Productivity
If conveying force and cutting force are applied to the electrode plate, then cutting process is enabled, but vibrations in thickness direction cause unstable cutting and affect cutting quality
Solution Approach 1:
The limiting members provide counteracting support forces that balance the conveying and cutting forces, preventing excessive vibration and deformation of the electrode plate in the thickness direction, thereby maintaining cutting quality while enabling efficient processing
3Manufacturing precision
If first limiting member is positioned between electrode plate and first cutting mechanism, then laser light can pass through cutting hole, but need to ensure precise positioning to avoid cutting the limiting member
Solution Approach 1:
The first limiting member is designed with a cutting hole at a specific location that corresponds to the laser cutting trajectory, creating a localized opening that allows laser light to pass through while the rest of the limiting member structure provides mechanical support and vibration damping
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
Stabilizes the cutting process, reducing the risk of incomplete cuts and damage, thereby improving the forming quality of electrode plates.
Implementation Method 1
a first cutting mechanism located on one side of the electrode plate in a thickness direction and configured to cut the uncoated region so that the uncoated region forms a tab connected to the coated region and separated from the scrap portion; the first limiting member is located between the electrode plate and the first cutting mechanism in the thickness direction and is provided with a cutting hole allowing laser light emitted by the first cutting mechanism to pass through
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A die cutting device (100), comprising a conveying mechanism (10), a first cutting mechanism (20), a first limiting piece (30) and a second limiting piece (40). The conveying mechanism (10) is used for conveying a pole piece (200). The first cutting mechanism (20) is located on one side of the pole piece (200) in a thickness direction, and the first cutting mechanism (20) is used for cutting an uncoated area (210). The first limiting piece (30) is provided with a first cutting hole (31), and the first cutting hole (31) matches a cutting track of a laser (300); and the second limiting piece (40) is located on the side of the pole piece (200) away from the first limiting piece (30) in the thickness direction, and the second limiting piece (40) and the first limiting piece (30) are configured to match and limit the pole piece (200) in the thickness direction.