Electrode Substrate Singulation With Integrated Tab Cutting
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Solution Overview
Problem
Existing battery cell production methods require separate systems for conductor contour cutting and electrode separation, leading to increased handling steps, material damage risk, and manufacturing inaccuracies due to multiple process steps and web guidance systems.
Innovation Solution
A cutting method and device that integrates conductor tab cutting and electrode separation into a single process using a cutting device with multiple cutting units and a conveyor system, allowing simultaneous or overlapping cuts to minimize handling and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate systems are used for conductor contour cutting and electrode separation, then each process can be optimized independently, but the number of handling steps increases and material damage risk increases
Solution Approach 1:
The patent combines conductor contour cutting and electrode separation into a single integrated cutting device that performs both operations simultaneously on the web-shaped electrode substrate. This merging eliminates the need for separate systems and intermediate handling steps, thereby reducing material damage risk while maintaining manufacturing precision through coordinated cutting operations.
2Manufacturing precision
If multiple web guidance systems are used between notching and separating, then positioning accuracy can be maintained, but device complexity increases
Solution Approach 1:
The integrated cutting device performs both conductor contour cutting and electrode separation in a single operation, eliminating the need for multiple web guidance systems that would be required between separate notching and separating processes. This reduces device complexity while maintaining positioning accuracy through the coordinated action of the combined cutting units.
3Manufacturing precision
If conductor tab cutting and electrode separation are performed in separate steps, then each cut can be precisely controlled, but the number of handling steps increases
Solution Approach 1:
The cutting device performs conductor contour cutting and electrode separation as continuous operations in a single integrated process. The device maintains continuous cutting action without interrupting the web feed, thereby eliminating intermediate handling steps and improving productivity while preserving cut control through coordinated operation of the cutting units.
Solution Approach 2:
By merging conductor tab cutting and electrode separation into a single integrated process, the patent eliminates the need for separate handling steps between operations. The combined cutting device performs both functions simultaneously, reducing the number of handling steps and improving productivity while maintaining precise cut control.
4Adaptability or versatility
If independent process steps are linked together, then flexibility is maintained, but manufacturing inaccuracies increase
Solution Approach 1:
The integrated cutting device combines conductor contour cutting and electrode separation into a single coordinated operation, eliminating the accumulation of geometric inaccuracies that would result from linking multiple independent process steps. The device maintains process flexibility through programmable control while ensuring higher geometry accuracy by performing both cuts in one continuous operation.
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
Reduces material damage and enhances manufacturing precision, enabling higher energy density in battery cells by minimizing handling steps and improving geometric accuracy.
Implementation Method 1
separating the electrode piece provided with the cut-out conductor tab by cutting through the electrode substrate including the active material and also the section cut out in step b)
Data Source
Figure 1
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AI summary
To improve the singulation of electrode pieces for the mass production of battery cells for electric vehicles or the like, the invention provides a cutting method and a cutting device (10) in which, during the conveying of an electrode substrate (16) through a cutting device (12), at least one conductor tab (20) is cut free from a conductor strip of the electrode substrate (16), whereby, viewed in a conveying direction (68) downstream of the conductor tab (20), a section (26) of unneeded material of the conductor strip (24) is created, and then the electrode piece (14) provided with the cut-free conductor tab (20) is singulated by cutting through the electrode substrate (16) including the active material (18) and also the section (26) cut out in step b). This reduces the size of the section (26) and allows it to be removed more reliably from the cutting device (12).