Sheet Cutter Fusion Structure to Prevent Electrode Exposure
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Solution Overview
Problem
Existing sheet cutting technologies fail to prevent the folding or displacement of sheets during the transfer process, leading to potential electrode exposure and safety issues such as short circuits and fires in battery cells.
Innovation Solution
A sheet cutting and fusion apparatus with upper and lower cutters featuring specific cutting and fusion surfaces and connection portions that allow simultaneous cutting and fusion of sheets, maintaining their stable position during transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only cutting is performed without fusion, then the cutting process is simple and fast, but the sheets may fold or displace during transfer causing safety issues
Solution Approach 1:
The patent combines the cutting function and fusion function into a single integrated apparatus. The upper cutter includes both a cutting surface and a fusion surface, while the lower cutter includes both a cutting surface and a fusion surface. This merging of functions eliminates the need for separate cutting and fusion equipment, preventing sheet folding during transfer while maintaining apparatus simplicity.
Solution Approach 2:
Each cutter is designed with multi-functionality, serving both cutting and fusion purposes. The upper cutter has a first cutting surface for cutting and a first fusion surface for fusion; similarly, the lower cutter has a second cutting surface for cutting and a second fusion surface for fusion. This universal design allows a single apparatus to perform multiple operations that previously required separate devices.
2Productivity
If separate cutting and fusion equipment is used, then each function can be optimized independently, but additional equipment increases device complexity and process steps
Solution Approach 1:
The patent merges separate cutting and fusion operations into a single integrated apparatus. By combining these functions, the number of equipment pieces is reduced, and the manufacturing process becomes more efficient without sacrificing the optimization of individual functions.
Solution Approach 2:
The cutters are designed with universal functionality to perform both cutting and fusion operations. This multi-functionality eliminates the need for additional dedicated fusion equipment, thereby increasing productivity while reducing overall device complexity.
3Object-affected harmful factors
If sheets are cut without simultaneous fusion, then the cutting process is simpler, but electrode exposure and short circuit risks increase
Solution Approach 1:
The fusion surfaces are positioned to perform fusion action simultaneously with or immediately after the cutting action. The first fusion surface of the upper cutter and the second fusion surface of the lower cutter are arranged to fuse the sheets at the cut edges, preventing electrode exposure before the sheets can fold or displace.
Solution Approach 2:
The cutting and fusion functions are merged into the same apparatus structure. The upper cutter includes both cutting and fusion surfaces, and the lower cutter includes both cutting and fusion surfaces, allowing simultaneous execution of both operations to eliminate safety risks.
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
Prevents sheet folding and maintains sheet stability during transfer, reducing the risk of electrode exposure and enhancing manufacturing yield by integrating cutting and fusion processes without additional equipment.
Implementation Method 1
Each of the upper cutter and the lower cutter may include a structure capable of being heated
Implementation Method 2
a sheet cutting and fusion apparatus... configured such that a part of one sheet and a part of another sheet can be melted and coupled to each other
Data Source
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AI summary
The present invention relates to a sheet cutting and fusion apparatus including an upper cutter disposed at the uppermost surface of at least two sheets that overlap each other; and a lower cutter disposed at the lowermost surface of the sheets, wherein the upper cutter includes a first cutting surface configured for contacting the lower cutter without any step when the upper cutter is moved vertically; a first fusion portion having a surface parallel to the first cutting surface in the state in which a first step is formed so as to extend from the first cutting surface; a lower surface configured to face the sheets; and a first connection portion having a curved corner that connects the lower surface and the first fusion portion to each other, and the lower cutter includes a second cutting surface configured for contacting the upper cutter without any step when the lower cutter is moved vertically; a second fusion portion having a surface parallel to the second cutting surface in the state in which a second step is formed so as to extend from the second cutting surface; an upper surface configured to face the sheets; and a second connection portion having a curved corner that connects the upper surface and the second fusion portion to each other. The sheet cutting and fusion apparatus includes a structure capable of not only cutting the parts of cutting sheets on which electrodes are disposed spaced apart from each other between the electrodes but also fusing the cut outer peripheries of the sheets.