Electrode Sheet Cutting Using Notching Groove Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting apparatuses for electrode sheets face accuracy issues due to deformation of electrode tabs, leading to irregular cuts and defective electrodes, as they rely on detecting electrode tabs rather than precise notching grooves for cutting.
Innovation Solution
An apparatus with a transfer unit, detection unit, and cutting unit that utilizes notching grooves formed on the electrode sheet's side surface, where a line sensor detects the grooves through transmittance variations to generate a detection signal, ensuring accurate cutting by synchronizing the cutting process with the groove detection, thereby maintaining consistent cutting time and preventing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrode tab detection is used for cutting, then the cutting apparatus can operate with simple structure, but cutting accuracy deteriorates when electrode tab is deformed
Solution Approach 1:
The patent introduces notching grooves as an intermediary feature on the electrode sheet that serves as a reliable detection target. These grooves are formed during electrode manufacturing and provide a consistent geometric reference that is independent of electrode tab deformation, thereby mediating between the simple detection approach and high cutting accuracy requirements
Solution Approach 2:
The patent replaces mechanical/optical detection of electrode tabs with optical detection of notching grooves using a line sensor. This substitution utilizes the geometric precision of laser-formed grooves rather than relying on the physical integrity of electrode tabs, achieving higher measurement precision while maintaining automated operation
2Ease of operation
If electrode tab detection is used for cutting, then the cutting process can be simplified, but cutting precision deteriorates due to deformation
Solution Approach 1:
The notching grooves serve as an intermediary detection target that simplifies the cutting process by providing a reliable, deformation-free reference feature. The grooves are easily detectable by the line sensor and eliminate the complexity of handling deformed electrode tabs, thereby improving ease of operation without sacrificing precision
3Manufacturing precision
If notching groove detection is used for cutting, then cutting accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs a line sensor (optical detection device) to detect notching grooves, replacing more complex mechanical measurement systems. This optical detection approach achieves high cutting accuracy while maintaining relatively simple device structure, as the line sensor can precisely track the groove positions without requiring complex mechanical positioning or contact measurement systems
4Manufacturing precision
If notching groove detection is used for cutting, then cutting precision is improved, but operation complexity increases
Solution Approach 1:
The notching grooves act as an intermediary that simplifies operation by providing clear, unambiguous detection signals. The grooves' geometric consistency ensures reliable detection by the line sensor, eliminating the operational complexities associated with identifying and accommodating deformed electrode tabs during the cutting process
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 solution enhances cutting accuracy and prevents defective electrodes by uniformly controlling the cutting time based on notching groove detection, ensuring consistent quality of manufactured electrodes.
Implementation Method 1
the line sensor comprises a plurality of light receiving elements, and the plurality of light receiving elements detects the notching groove through a variation in transmittance, which occurs when the notching groove of the electrode sheet passes through the measuring point
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An apparatus for cutting an electrode sheet according to the present invention comprises: a transfer unit transferring the electrode sheet, in which a plurality of notching grooves are formed in a side surface thereof, up to a cutting point via a measuring point, so that, when the notching groove, which is disposed at a front end, of the notching grooves formed in the electrode sheet passes through the cutting point, the notching groove, which is disposed in a rear end of the front notching groove, passes through the measuring point; a detection unit provided at the measuring point to detect the notching groove of the electrode sheet, which passes through the measuring point, thereby generating a notching groove detection signal; and a cutting unit provided at the cutting point to cut the electrode sheet, in which the notching groove passing through the cutting point is disposed, according to the notching groove detection signal generated by the detection unit.