Secondary Battery Cell Taping for Spring-Back-Free Sealing
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Solution Overview
Problem
Secondary battery cells face issues with spring back due to incomplete contact between the sealing and accommodating portions, and existing tape attachment methods are unstable and prone to detachment.
Innovation Solution
A taping apparatus with a support unit and roller unit that adheres a single sheet of adhesive to the secondary battery cell, using multi-rollers or a single roller to ensure close contact and prevent detachment, incorporating a temporary adhering unit for initial adhesion and a fully adhering supporter for stable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing portion is folded in the direction of the accommodating portion, then the sealing is improved, but spring back occurs causing incomplete contact
Solution Approach 1:
The support unit applies preliminary anti-action by providing continuous support to the adhesive member during the sealing process. This counteracts the spring back force that would otherwise cause incomplete contact, allowing the sealing portion to maintain proper contact with the accommodating portion while preserving sealing quality.
Solution Approach 2:
The adhesive member acts as an intermediary between the sealing portion and accommodating portion. The support unit ensures this intermediary maintains proper contact by preventing spring back, thereby enabling effective sealing while achieving complete contact between the battery components.
2Device complexity
If a single sheet of adhesive member is used, then the attachment process is simplified, but stable attachment is difficult to achieve
Solution Approach 1:
The support unit is segmented into functional modules (adsorption temporary adhering unit and fully adhering supporter) that work together to achieve stable attachment of the single sheet adhesive member. This modular approach maintains process simplicity while ensuring reliability through specialized functional distribution.
Solution Approach 2:
The adsorption temporary adhering unit performs preliminary action by temporarily securing the single sheet adhesive member before final attachment. This preliminary step ensures that even a simple single-sheet approach achieves stable attachment by preventing displacement during the bonding 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 apparatus effectively prevents spring back and ensures stable attachment of the adhesive to the secondary battery cell, preventing detachment and ensuring secure sealing.
Implementation Method 1
an adsorption temporary adhering unit adsorbing the adhesive member to move in a direction of the secondary battery cell, and adhering a portion of the adhesive member to the secondary battery cell
Implementation Method 2
a roller unit continuously moving in at least one direction of the accommodating portion and the sealing portion and adhering the adhesive member supported by the support unit to the secondary battery cell
Data Source
AI summary
A taping apparatus for a secondary battery, configured to adhere an adhesive member cut and provided as a single sheet to a secondary battery cell including an accommodating portion in which an electrode assembly is accommodated and a sealing portion folded in a direction of the accommodating portion and sealing an edge of the accommodating portion, includes a support unit supporting a portion of the adhesive member; and a roller unit continuously moving in at least one direction of the accommodating portion and the sealing portion and adhering the adhesive member supported by the support unit to the secondary battery cell.