Electrode Sheet Splicing Tape for Continuous Rolling
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Solution Overview
Problem
The splicing of electrode sheets during the rolling and slitting process is inefficient due to the need for the rolling assembly to release and re-apply pressure at the seam, affecting processing efficiency and effectiveness.
Innovation Solution
An electrode sheet splicing method using an adhesive tape with a base film and glue layer, where the glue layer is coated on a coating area with a surrounding blank area, preventing glue overflow and ensuring continuous rolling without pressure release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive tape is used to splice electrode sheets, then the electrode sheets can be bonded together, but the rolling assembly must release pressure when the seam passes through, reducing processing efficiency
Solution Approach 1:
The base film is designed with different functional zones: a coating area where adhesive is applied for bonding, and a blank area without adhesive that prevents glue overflow. This local differentiation allows the adhesive to be confined to specific regions, preventing it from overflowing onto the rolling assembly while maintaining bonding strength at the splice joint.
Solution Approach 2:
The base film is segmented into distinct functional regions (coating area and blank area) with different properties. The coating area provides bonding function while the blank area provides containment function, allowing the adhesive to be effectively confined and preventing interference with the rolling assembly operation.
2Strength
If adhesive is applied broadly to ensure bonding coverage, then bonding strength is improved, but glue overflow occurs when pressed by the rolling assembly
Solution Approach 1:
The adhesive is applied only in the coating area rather than uniformly across the entire base film. This localized adhesive application ensures sufficient bonding strength at the splice joint while preventing adhesive from overflowing onto the rolling assembly during the pressing operation.
Solution Approach 2:
The blank area acts as an intermediary barrier that confines the adhesive within the coating area. When pressure is applied by the rolling assembly, the blank area prevents the adhesive from migrating outward, thus eliminating the harmful effect of glue overflow while maintaining the bonding function.
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
Improves processing efficiency and effectiveness by maintaining continuous rolling and enhancing the bonding strength of the spliced electrode sheets without glue overflow.
Implementation Method 1
The glue layer is coated on at least part of the coating area, and the coating area is bonded to the surface of the first end and the surface the second end through the glue layer
Data Source
Figure 1~2a
Figure 2b~2c
Figure 3
AI summary
Disclosed are an electrode sheet and a splicing method of an electrode sheet. The electrode sheet includes a first (12a) and second (12b) electrode sheet bands and an adhesive tape (100). The first electrode sheet band has a first end in a length direction of the first electrode sheet band. The second electrode sheet band has a second end along the length direction of the second electrode sheet band same as the length direction of the first electrode sheet band. The adhesive tape is attached to surfaces of the first and second ends. The adhesive tape includes a base film (110) and a glue layer (120). The base film includes a coating area (111) and a blank area (112) arranged around the coating area. The glue layer is coated on at least part of the coating area. The coating area is bonded to the surfaces of the first and second ends respectively through the glue layer.