Electrode Sheet Taping with Wide-Tape Pressing to Prevent Wrinkles
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Solution Overview
Problem
Conventional taping devices for electrode sheets face issues of low productivity and efficiency due to the need for individually attaching multiple layers of tape to each edge part of active material patterns, which can lead to defects such as wrinkles and bubbles when wider tapes are used.
Innovation Solution
A taping device with a gripper that grips a tape wider than the spacing between neighboring pattern portions, a pressurizing block that presses the tape onto the electrode sheet, and a cleaning unit to remove foreign substances, ensuring high-quality attachment of the tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one layer of tape is used to cover multiple edge parts simultaneously, then productivity and efficiency are improved, but the adhesion quality deteriorates due to wrinkles and bubbles
Solution Approach 1:
The patent divides the single wide tape application into multiple sequential pressing zones along the tape width direction. Each pressing zone applies pressure to a specific segment of the tape, preventing wrinkles and bubbles from forming across the entire width while maintaining high productivity through continuous processing.
Solution Approach 2:
The pressing mechanism is designed to be movable in the width direction of the tape, allowing dynamic adjustment of the pressing position. This enables the system to adapt to different tape widths and pattern spacings while maintaining optimal adhesion quality throughout the taping process.
2Productivity
If a tape with wider width is used to cover all edge parts at once, then the number of taping operations is reduced, but the occurrence of defects such as wrinkles and bubble layers increases
Solution Approach 1:
The pressing operation is segmented into multiple zones along the tape width, with each zone having its own pressing mechanism or pressing sequence. This segmentation allows the wide tape to be applied in one operation while preventing defects through distributed pressure application across different segments.
Solution Approach 2:
The patent introduces a pressing mechanism that acts as an intermediary between the tape and the electrode sheet. This intermediary applies controlled pressure to eliminate air pockets and prevent wrinkle formation during the single-wide-tape application process, thereby improving reliability.
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 device improves productivity and efficiency by allowing one layer of tape to cover multiple edge parts simultaneously while minimizing wrinkles and bubbles, ensuring high-quality tape attachment.
Implementation Method 1
a pressurizing block capable of pressurizing the tape toward the current collector portion through an area having a width wider than a spacing between the two pattern portions
Implementation Method 2
a gripper capable of gripping or releasing a tape and being moved in the width direction of the current collector portion
Data Source
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AI summary
The present disclosure relates to a taping device for an electrode sheet, and the taping device for an electrode sheet according to one aspect of the present disclosure may include an electrode sheet supply unit that supplies an electrode sheet including a foil-shaped current collector portion and a plurality of pattern portions arranged along the length direction of the current collector portion on one surface of the current collector portion; a taping unit that forms a tape portion attached to one surface of the current collector portion to overlap at least a part of two neighboring pattern portions among the plurality of pattern portions, respectively; and an electrode sheet recovery unit that recovers an electrode sheet on which the tape portion is formed, wherein the taping unit may include a gripper capable of gripping or releasing a tape and being moved in the width direction of the current collector portion; and a pressurizing block capable of pressurizing the tape toward the current collector portion through an area having a width wider than a spacing between the two pattern portions.