Rolling Electrode Plates with Dynamic Tab Notching
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Solution Overview
Problem
The manufacturing of high-capacity multi-tab electrode assemblies for batteries is hindered by difficulties in aligning electrode tabs, requiring cumbersome processes and significant material consumption, and necessitates two separate apparatuses, increasing costs and space requirements.
Innovation Solution
A system that performs both notching and rolling processes in a continuous or batch mode, with adjustable tab intervals based on electrode plate thickness changes, using supplying units, electrode processing units, buffer units, and sensor systems to ensure proper alignment and efficient material transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode tabs are formed using separate notching apparatus and rolling apparatus, then electrode tabs can be formed on electrode plates, but alignment of electrode tabs becomes difficult and requires cumbersome correction processes
Solution Approach 1:
The patent combines the notching apparatus and rolling apparatus into a single integrated apparatus. The notching unit forms electrode tabs on the electrode plate, and the rolling unit immediately rolls the electrode plate with the formed tabs in one continuous operation. This integration eliminates the need for separate apparatuses and intermediate transfer processes, thereby improving tab alignment precision and reducing device complexity.
Solution Approach 2:
The notching unit forms the electrode tabs on the electrode plate before the rolling process begins. By pre-forming the tabs at their final positions on the electrode plate, the subsequent rolling process simply rolls the plate with tabs already in place, ensuring proper alignment without requiring post-rolling correction.
2Productivity
If electrode tabs are formed and aligned using traditional separate apparatuses, then electrode assembly can be manufactured, but manufacturing time increases and base material is wasted
Solution Approach 1:
The integrated apparatus enables continuous manufacturing by performing notching and rolling in one uninterrupted sequence. The electrode plate is fed through the notching unit to form tabs, then immediately rolled by the rolling unit without stopping or requiring manual intervention for alignment correction. This continuous operation eliminates downtime and increases manufacturing efficiency.
Solution Approach 2:
The apparatus includes a sensor unit that detects the positions of electrode tabs after formation and before rolling. This feedback information is used to adjust the rolling process parameters to ensure proper alignment, preventing the need for time-consuming correction processes and reducing manufacturing delays.
3Adaptability or versatility
If electrode plate thickness varies, then electrode tabs become misaligned, but traditional systems require stopping to correct notching intervals
Solution Approach 1:
The apparatus dynamically adjusts the notching intervals based on the actual thickness of the electrode plate being processed. Sensors detect thickness variations in real-time, and the control system automatically modifies the notching parameters to maintain proper tab alignment despite thickness changes, enabling continuous operation without stopping for corrections.
Solution Approach 2:
The system changes the notching interval parameter in response to detected electrode plate thickness variations. When the plate thickness varies from the standard, the control unit calculates and applies the appropriate notching interval adjustment, ensuring that electrode tabs are formed at correct positions relative to the plate dimensions, thereby maintaining alignment without interrupting production.
Data Source
AI summary
A system for rolling electrode plates includes: supplying units for supplying first and second electrode plates and separators; electrode processing units for forming first electrode tabs having gradually increasing intervals between tabs on one side of the first electrode plate and second electrode tabs having gradually increasing intervals between tabs on one side of the second electrode plate by performing cutting processes on the sides of the first and second electrode plates; an assembling unit for forming an electrode assembly by rolling the first and second electrode plates and the separators; and buffer units for temporarily storing the first and second electrode plates to compensate for differences in processing rates and base material transfer amounts between the electrode processing units and the assembling unit, and for transmitting the temporarily stored first and second electrode plates to the assembling unit.