Pouch Forming Pressure Feedback to Prevent Cracks and Wrinkles
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Solution Overview
Problem
The existing pouch forming process for battery cells often results in cracks or excessive wrinkles in the pouch sheet due to inadequate pressure adjustment during the formation of the receiving portion, leading to reduced product quality and increased operational complexity.
Innovation Solution
A pouch forming apparatus equipped with a sensor unit to measure pressure, a lifting unit to adjust the pressing plate's inclination, and a forming unit to form the receiving portion, allowing precise control of pressure distribution through independent operation of multiple lifting units and real-time pressure feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is increased to fix the pouch sheet, then the pouch sheet is securely fixed, but cracks occur in the pouch sheet
Solution Approach 1:
The pressing plate applies pressure locally at the edges of the pouch sheet to secure fixing, while the receiving groove area remains pressure-free to prevent cracks. This localized pressure application ensures reliable fixing without damaging the pouch sheet material.
Solution Approach 2:
The pressing plate is designed with a receiving groove that segments the pressing area, creating distinct high-pressure zones at the edges and a low-pressure zone in the center. This segmentation allows different regions to serve different functions: securing the sheet at edges while protecting the forming area.
2Object-affected harmful factors
If pressure is decreased to prevent cracks, then the pouch sheet remains intact, but the pouch sheet is not securely fixed
Solution Approach 1:
The pressing plate applies pressure locally at the edges of the pouch sheet to secure fixing, while the receiving groove area remains pressure-free to prevent cracks. This localized pressure application ensures reliable fixing without damaging the pouch sheet material.
3Manufacturing precision
If pressure is increased to form the receiving portion, then the receiving portion is well-formed, but excessive wrinkles are formed in the pouch sheet
Solution Approach 1:
The pressing plate applies pressure locally at the edges to secure the pouch sheet, while the receiving groove area remains pressure-free during the forming process. This localized pressure distribution enables proper receiving portion formation without creating excessive wrinkles in the pouch sheet.
4Device complexity
If manual pressure adjustment is used, then the apparatus structure remains simple, but pressure control precision is insufficient
Solution Approach 1:
A sensor unit measures the pressure applied to the pouch sheet and provides feedback to the control unit. The control unit adjusts the pressing plate position based on this feedback to achieve the target pressure, enabling precise pressure control through automated feedback mechanisms.
Solution Approach 2:
The system automatically adjusts the pressing plate position based on sensor feedback without requiring manual intervention. The control unit processes the pressure information and autonomously controls the lifting unit to achieve the desired pressure, making the system self-regulating.
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 minimizes cracks and wrinkles in the pouch sheet by ensuring uniform pressure application, enhancing product quality and reducing operational complexity by enabling precise pressure adjustment.
Implementation Method 1
a sensor unit for measuring the pressure formed between the pressing plate and the seating unit is provided on an upper part of the seating unit
Implementation Method 2
a lifting unit which causes vertical movement of the pressing plate
Implementation Method 3
a forming unit which presses the pouch sheet to form the receiving portion
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A pouch forming apparatus is configured to form a receiving portion for housing an electrode assembly in a pouch sheet, and includes a seating unit on which the pouch sheet is seated, a pressing plate which fixes the pouch sheet to the seating unit by pressing the pouch sheet, a lifting unit which causes vertical movement of the pressing plate, and a forming unit which presses the pouch sheet to form the receiving portion, wherein a sensor unit for measuring the pressure formed between the pressing plate and the seating unit is provided on an upper part of the seating unit.