Electrode Tab Tape Attachment for Secure End Bonding in Pouch Cells
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Solution Overview
Problem
Conventional protective tape attachment devices fail to effectively bond both ends of the protective tape to each other, leading to detachment and interference during the battery cell manufacturing process, which can cause insulation failures and unsealed regions in the pouch-type battery cell.
Innovation Solution
A protective tape attachment device comprising upper and lower main attachment devices, along with independent upper and lower end attachment devices, that pressurize and bond both ends of the protective tape to each other, preventing detachment and interference during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional protective tape attachment devices are used, then the attachment process is simple, but both ends of the protective tape cannot be effectively bonded to each other, leading to detachment and interference during manufacturing
Solution Approach 1:
The attachment device is divided into multiple independent attachment units: upper main attachment device, lower main attachment device, upper end attachment device, and lower end attachment device. Each unit independently attaches protective tape to different locations, allowing the ends to be effectively bonded without requiring a complex monolithic structure.
Solution Approach 2:
The device attaches protective tape not only to the upper and lower surfaces of the electrode tab but also extends attachment to the side ends of the tab. This multi-dimensional attachment approach ensures that both ends of the protective tape are securely bonded, preventing detachment during manufacturing processes.
2Reliability
If protective tape ends are not properly bonded, then the attachment device structure remains simple, but detached tape ends interfere with the sealing process and cause insulation failures
Solution Approach 1:
The attachment device performs preliminary bonding of the protective tape ends to the electrode tab before the sealing process begins. By securing the tape ends in advance, the device prevents potential interference with subsequent sealing operations, ensuring insulation reliability and avoiding manufacturing defects.
Solution Approach 2:
The protective tape acts as an intermediary element that is securely bonded to the electrode tab by the attachment device. This secure bonding prevents the tape from interfering with the sealing process, thereby maintaining both insulation reliability and manufacturing efficiency.
3Reliability
If both ends of the protective tape are securely bonded, then insulation failures are prevented, but the attachment process requires additional time and complexity
Solution Approach 1:
The attachment device operates continuously to attach protective tape to multiple surfaces of the electrode tab in a single integrated process. The upper and lower main attachment devices work simultaneously, and the end attachment devices complete the bonding of tape ends, ensuring continuous useful action that secures insulation reliability without excessive time loss.
Data Source
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AI summary
The present invention relates to a protective tape attachment device for electrode tab protection of a secondary battery and a battery cell manufacturing method using the same, and more specifically, relates to a protective tape attachment device capable of attaching both ends of a protective tape, and a battery cell manufacturing method using the same. According to one example of the present invention, it may provide a protective tape attachment device capable of bonding both ends of each of an upper protective tape and a lower protective tape to each other up and down, comprising an upper main attachment device and a lower main attachment device attaching the upper protective tape and the lower protective tape to an electrode tab respectively, and an upper end attachment device and a lower end attachment device moving independently of the upper main attachment device and the lower main attachment device on both sides of the upper main attachment device and the lower main attachment device respectively.