Stacked Electrode Taping With Vacuum Hold and Rolling Pressure
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Solution Overview
Problem
Conventional taping devices for stacked electrode assemblies face issues such as tape separation, wrinkling, and bubble generation during the taping process, leading to defects in the battery cell, particularly in the stacked electrode assembly where the separator is not accurately fixed with tape.
Innovation Solution
A taping device and method that includes a support part, vacuum adsorption part, gripper part, and taping mechanism part to guide and pressurize the tape, ensuring it is tensioned and rolled onto the electrode assembly, preventing separation and wrinkles, and effectively fixing the tape to the desired position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the tape is pressed firmly to the electrode assembly, then attachment strength improves, but tape wrinkles and bubbles occur
Solution Approach 1:
The pressing mechanism uses a movable pressing member that can dynamically adjust its position and pressure application. The pressing member moves along the electrode assembly surface, applying pressure progressively rather than all at once, which allows air to escape and prevents bubble formation while maintaining strong attachment
Solution Approach 2:
The gripper part performs preliminary tensioning of the tape before the pressing operation begins. This preliminary action ensures the tape is already taut and free of wrinkles when pressing starts, allowing the pressing member to achieve strong attachment without creating surface defects
2Reliability
If the tape is tensioned during movement, then separation is prevented, but the taping process complexity increases
Solution Approach 1:
The gripper part combines multiple functions into a single mechanism: it grips the tape ends, applies tension, and guides the tape during movement. This merging reduces the need for separate components for each function, maintaining positioning accuracy while limiting the increase in overall system complexity
Solution Approach 2:
The vacuum adsorption part serves multiple purposes: it initially holds the tape in position, maintains positioning during gripper movement, and can continue to support the tape throughout the pressing process. This multi-functionality reduces the need for additional specialized components, balancing positioning reliability with device complexity
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 solution prevents tape separation and wrinkles, improves taping quality by tensioning and rolling the tape, and ensures stable attachment to the electrode assembly, enhancing the overall taping process.
Implementation Method 1
a vacuum adsorption part adsorbing and fixing the non-pressure-sensitive adhesive side of the tape
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention relates to a taping device for a stacked electrode assembly and a method for taping a stacked electrode assembly, and specifically, relates to a taping device and method for a stacked electrode assembly for guiding movement of a tape, and pressurizing and rolling the tape to adhere to the stacked electrode assembly in a taping process for a stacked electrode assembly. According to one example of the present invention, a taping device for a stacked electrode assembly can be provided, which comprises a support part provided to correspond to the central portion of the tape to be attached to the stacked electrode assembly and the lateral side of the stacked electrode assembly; a vacuum adsorption part adsorbing and fixing the non-pressure-sensitive adhesive side of the tape; a gripper part further fixing the tape by operating to grip the end of the tape; and a taping mechanism part provided to attach the tape to the upper surface and the lower surface of the stacked electrode assembly by moving along the upper surface and the lower surface of the stacked electrode assembly from the upper portion and the lower portion of the support part.