Pouch Fabric Roll Transfer for Clean Continuous Battery Slitting
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Solution Overview
Problem
Conventional secondary battery manufacturing methods face challenges in effectively removing foreign substances generated during the slitting process of pouch-type secondary batteries, which can cause defects and performance degradation, and require complex processes that hinder continuous production.
Innovation Solution
A method and device utilizing a roll transfer system with horizontal and vertical blowers to remove foreign substances, allowing for sequential and continuous slitting, blowing, and forming processes without interrupting the transfer of pouch fabric.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a slitting cutter is used to cut pouch fabric into unit pouches, then the pouch fabric can be divided into individual units, but foreign substances (aluminum fragments) are generated and adhere to the pouch surfaces
Solution Approach 1:
The patent extracts and removes foreign substances (aluminum fragments) generated during the slitting process using a dedicated foreign substance removal device with suction nozzles positioned near the cutting area, separating the harmful byproduct from the main production flow
Solution Approach 2:
The patent introduces an intermediary foreign substance removal device that acts as a mediator between the slitting cutter and the pouch transfer system, capturing aluminum fragments before they can adhere to the pouch surfaces and cause defects
2Ease of operation
If the pouch fabric is transferred through a stage with separate transfer devices, then the cut unit pouch can be moved, but foreign substance removal is limited to only the upper surface
Solution Approach 1:
The patent extends foreign substance removal from a single upper surface to both upper and lower surfaces by positioning suction nozzles on opposite sides of the pouch fabric, adding a vertical dimension to the cleaning process
Solution Approach 2:
The foreign substance removal device is designed with multiple suction nozzles that can simultaneously clean both surfaces of the pouch fabric, making the device universally effective for complete foreign substance removal rather than limited to one surface
3Manufacturing precision
If the pouch fabric is completely cut into separate unit pouches, then individual pouches can be formed, but continuous transfer through the roll cannot be maintained
Solution Approach 1:
The patent applies partial cutting where the pouch fabric is cut at regular intervals to form unit pouches while maintaining continuous feed, performing the cutting action partially rather than completely separating all sections at once, enabling both individual pouch formation and continuous production
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
Enables efficient and continuous production of pouch-type secondary batteries by effectively removing foreign substances and forming accommodation portions, reducing defects and improving production efficiency.
Implementation Method 1
a blower, which performs removal of foreign substances generated upon cutting of the pouch, on the transferred pouch
Data Source
Figure 1~3
Figure 4~6
AI summary
The present invention relates to a secondary battery manufacturing method, and more specifically, relates to a secondary battery manufacturing device and a secondary battery manufacturing method, which can effectively perform pouch cutting and foreign substance removal through a roll transfer process, and continuously perform unit pouch forming. According to one example of the present invention, a secondary battery manufacturing method, and a device using the same may be provided, which is characterized in that the method comprises: a transfer process for supplying a pouch fabric through a roll transfer device; and a slitting process for cutting the transferring pouch fabric in a direction perpendicular to the transfer direction to correspond to a length of a unit pouch, but partially cutting the pouch fabric to exclude both ends in the cutting direction, and the transfer process comprises a both end support transfer process for supporting and transferring uncut portions of both ends excluding the cut portion of the pouch fabric after the slitting process.