Battery Electrode Lamination Alignment Under Heating Vibration
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Solution Overview
Problem
The lamination process for secondary batteries faces issues with positional failure and twisting of the uppermost electrode during the heating step, where electrodes and separators are combined and transferred, leading to misalignment.
Innovation Solution
A lamination apparatus and method that includes a position correction part with a pair of correction members, such as a belt, to align the uppermost electrode with the set position of the separator, using a measurement sensor to calculate and correct the electrode's position, and a control member to determine if the alignment is within the set position, with the belt rotating in the same direction as the transfer to prevent speed deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If electrodes and separators are heated while being transferred in the lamination process, then bonding between electrodes and separators is improved, but the uppermost electrode becomes twisted or changes position due to vibration
Solution Approach 1:
The position correction part is introduced to perform preliminary position correction of the uppermost electrode before the bonding process completes. The correction members adjust the electrode position in advance, preventing twisting and misalignment from occurring during the heating and transfer process, thereby maintaining manufacturing precision while achieving proper bonding.
2Manufacturing precision
If the uppermost electrode is pressed by correction members during transfer, then position alignment is improved, but the electrode may be deformed or damaged
Solution Approach 1:
The pressing force applied by the correction members is precisely controlled and adjusted as a variable parameter. The force is set to be sufficient to correct position alignment but limited to avoid deforming or damaging the electrode. This parameter optimization allows position correction while maintaining electrode integrity throughout the heating and transfer process.
Data Source
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AI summary
The present invention relates to a lamination apparatus for a secondary battery. The lamination apparatus for the secondary battery comprises: an electrode transfer part configured to transfer at least one or more electrodes; a separator transfer part configured to transfer at least one or more separators; a combination part configured to combine and transfer the electrodes and the separators to be alternately disposed downward from an upper side; and a position correction part configured to correct a position of the uppermost electrode disposed at the uppermost side among the electrodes and the separators, which are combined by the combination part, to align the position of the electrode with a set position of the separator.