Zigzag Electrode Stacking for Battery Manufacturing
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Solution Overview
Problem
Conventional cell stacking apparatuses for secondary batteries are complex, requiring multiple apparatuses for electrode and separator handling, leading to reduced accuracy and manufacturing speed due to the lack of bonding between electrodes and separators during the stacking process.
Innovation Solution
A cell stacking apparatus with a grip part to hold and move electrode-separator assemblies, where positive and negative electrodes are bonded to opposing surfaces of a separator, and a stacking part that folds and stacks these assemblies in zigzags using a movable stack plate, simplifying the process and improving accuracy by ensuring electrodes and separators are bonded before folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrodes and separator are not bonded in advance during stacking, then multiple separate apparatuses (cutting, supply, alignment, stacking) are required, but this increases device complexity and reduces manufacturing efficiency
Solution Approach 1:
The patent combines the cutting apparatus, supply apparatus, alignment apparatus, and stacking apparatus into a single integrated cell stacking apparatus. The cutting unit cuts electrodes and separators, the supply unit feeds them to the bonding unit, which bonds electrodes to the separator, and the stacked unit performs folding and stacking—all within one apparatus. This integration eliminates the need for multiple separate apparatuses while maintaining high manufacturing efficiency.
2Manufacturing precision
If electrodes and separator are not bonded in advance, then the stacking process requires multiple separate operations, but this reduces manufacturing precision and accuracy
Solution Approach 1:
The bonding unit bonds the electrodes to the separator in advance before the folding and stacking operations. This preliminary bonding ensures that the electrodes and separator are firmly attached, maintaining accurate electrode positions during subsequent handling and stacking operations, thereby improving manufacturing precision.
3Productivity
If multiple separate apparatuses are used for stacking, then the process can be divided into independent steps, but this increases device complexity and reduces overall efficiency
Solution Approach 1:
The patent integrates cutting, supply, bonding, and stacking functions into a single apparatus that operates in a continuous workflow. The cutting unit cuts electrodes and separators, the supply unit feeds them to the bonding unit, which bonds electrodes to the separator, and the stacked unit performs folding and stacking—all within one apparatus. This integration eliminates the need for multiple separate apparatuses while maintaining high manufacturing efficiency.
4Manufacturing precision
If electrodes are cut and supplied separately before stacking, then alignment can be performed, but this requires additional apparatuses and reduces manufacturing speed
Solution Approach 1:
The patent combines the cutting apparatus, supply apparatus, alignment apparatus, and stacking apparatus into a single integrated cell stacking apparatus. The cutting unit cuts electrodes and separators, the supply unit feeds them to the bonding unit, which bonds electrodes to the separator, and the stacked unit performs folding and stacking—all within one apparatus. This integration eliminates the need for multiple separate apparatuses while maintaining high manufacturing efficiency.
Data Source
AI summary
The present disclosure relates to a cell stacking apparatus for a second battery and a system for manufacturing a secondary battery. The cell stacking apparatus includes a grip part configured to hold and move an electrode-separator assembly having a plurality of positive electrode plates and a plurality of negative electrode plates, in which each of the plurality of positive electrode plates and each of the plurality of negative electrode plates are respectively bonded to opposing surfaces of a separator, and a stacking part including a stack plate movable in a cell stacking direction. The stacking part is configured to fold and stack the electrode-separator assembly on the stack plate, and to move the stack plate downward to fold the electrode-separator assembly in zigzags when the grip part holds and moves the electrode-separator assembly to the stack plate.