Pouch Cell Adhesive Member Geometry to Prevent Sharp Corners
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Solution Overview
Problem
The existing adhesive tapes used on pouch cells often develop sharp corners when pressed down, affecting the measurement of the outer contour size and increasing production costs due to labor and equipment inefficiencies.
Innovation Solution
An adhesive member with specific edge configurations and boundary lines, forming included angles between 5° and 235°, is designed to minimize the formation of sharp corners when pressed down, ensuring the crease aligns within the boundary lines, thus reducing the impact on the outer contour size and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a straight-edge upright opening adhesive tape is used, then the adhesive tape provides insulation and protection, but the adhesive tape develops sharp corners when pressed down, affecting measurement precision and increasing production cost
Solution Approach 1:
The adhesive tape's opening is designed with curved edges instead of straight edges, forming rounded corners with specific radius values (R1≥3mm, R2≥3mm). This curvature design prevents the formation of sharp corners when the tape is pressed down during production, ensuring accurate outer contour size measurement while maintaining the tape's insulation and protection functions.
2Reliability
If a straight-edge upright opening adhesive tape is used, then the adhesive tape provides insulation and protection, but sharp corners cause unsmooth equipment operation and increased labor cost
Solution Approach 1:
By designing the adhesive tape opening with curved edges and rounded corners (R1≥3mm, R2≥3mm), the tape eliminates sharp corners that would otherwise cause equipment operation issues. This curvature design allows smooth passage through production equipment, maintaining insulation and protection while improving equipment operation efficiency and reducing labor costs.
3Ease of manufacture
If the adhesive tape is pressed down during transportation and production, then the adhesive tape adheres to the cell surface, but sharp corners are formed, affecting outer contour size measurement
Solution Approach 1:
The adhesive tape is designed with curved edges and rounded corners (R1≥3mm, R2≥3mm) so that when pressed down during transportation and production, the curvature prevents sharp corner formation. This maintains both the adhesion function and the accuracy of outer contour size measurement.
4Device complexity
If straight edges are used for the adhesive tape opening, then the design is simple, but the pressed-down tape forms sharp corners, increasing production cost
Solution Approach 1:
The adhesive tape design incorporates curved edges and rounded corners (R1≥3mm, R2≥3mm) instead of straight edges. This simple curvature modification prevents sharp corner formation, eliminating the need for additional processing or correction steps, thereby reducing production costs while maintaining design simplicity.
Data Source
AI summary
An adhesive member includes a first edge, a second edge, a third edge, a first boundary line, and a second boundary line. The first edge is opposite the second edge, the third edge includes a first end and a second end opposite the first end, and the first end is connected to the second edge. Two ends of the second boundary line are respectively connected to the first boundary line and the first edge, and two ends of the first boundary line are respectively connected to the second boundary line and the second end. An included angle R1 is formed by a connection line between the two ends of the first boundary line and a connection line between two ends of the second boundary line, and 5°≤SR1≤235°.