Laser-Abated Cell Packaging Material for Battery Labeling
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Solution Overview
Problem
Conventional cell packaging materials for lithium secondary batteries and portable storage batteries require separate labeling operations for distinguishability and exterior design, which are time-consuming and costly, and limit shape flexibility, color options, and functional properties like heat resistance and gas barrier properties.
Innovation Solution
A cell packaging material with a base film layer and a printing layer containing a binder resin and carbon black, where the base film or printing layer is partially removed by laser irradiation to expose the underlying layer, allowing for direct marking and design without separate labeling, and incorporating additional layers for enhanced properties like heat sealing and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional metallic can packaging materials are used, then the cell packaging has good strength and protection, but the shape of the cell is limited by the rigid metallic can structure
Solution Approach 1:
The patent replaces rigid metallic cans with flexible laminate packaging materials consisting of multiple layers including base films, adhesive layers, barrier layers, and sealant layers. This flexible structure allows the cell to be packaged in various shapes (cylindrical, parallelepiped, or other custom shapes) while maintaining adequate protection through the composite laminate structure rather than rigid metal walls
2Adaptability or versatility
If separate labeling operation is performed to impart distinguishability and exterior design, then the cell packaging has good exterior design and branding, but the production time is delayed and manufacture cost is increased
Solution Approach 1:
The patent combines the exterior design and labeling functions directly into the packaging material structure itself. The laminate layers include printed patterns, colors, and designs integrated during the material manufacturing process, eliminating the need for separate post-packaging labeling operations. This integration allows distinguishability and branding to be achieved while maintaining continuous production flow
Solution Approach 2:
The exterior design, including patterns, colors, and branding elements, is pre-applied to the packaging material during its manufacturing process before the cell packaging step. This preliminary action ensures that the packaging material arrives at the assembly line ready with all design elements, eliminating the need for subsequent labeling operations and reducing production time
3Adaptability or versatility
If labels are applied separately for distinguishability, then the cell packaging has good branding capability, but the manufacturing cost is increased
Solution Approach 1:
The patent merges the branding and labeling functions into the packaging material structure itself. The laminate includes layers with integrated printed patterns, colors, and design elements that provide branding capability. This consolidation eliminates separate labeling materials and operations, reducing overall manufacturing cost while maintaining branding effectiveness
4Device complexity
If conventional packaging materials are used, then the manufacturing process is simple, but the heat resistance, electric insulation property, and gas barrier properties are insufficient
Solution Approach 1:
The patent employs a composite laminate structure consisting of multiple specialized layers: base films providing structural support, adhesive layers for bonding, barrier layers for gas and moisture protection, and sealant layers for heat sealing. This composite material architecture delivers superior heat resistance, electric insulation, and gas barrier properties compared to conventional single-material packaging, while the manufacturing process remains relatively simple through layer lamination
5Shape
If laminate cell packaging materials are used to overcome shape limitations, then the cell packaging has good shape flexibility, but the heat sealing strength and chemical resistance are reduced
Solution Approach 1:
The patent addresses the heat sealing strength issue by incorporating specific sealant layers into the laminate structure. These sealant layers are designed with appropriate melting points and adhesive properties to provide strong heat sealing capability. The composite structure combines flexible base films with these functional sealant layers, maintaining shape flexibility while ensuring adequate heat sealing strength for battery packaging applications
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
This approach enables quick, cost-effective production of cell packaging materials with customizable designs, improved heat resistance, moisture-proofing, and flexibility in shape, while avoiding interlayer separation and maintaining printability with minimal color deviation, allowing for various colors and patterns.
Implementation Method 1
the base film layer or the printing layer is removed partially by laser irradiation
Data Source
AI summary
Cell packaging according to one embodiment of the present invention comprises: a base film layer; and a print layer provided beneath or on the base film layer, and including a binder resin and carbon black. The base film layer or print layer of the cell packaging is partially removed by means of laser irradiation to expose the layer under same. Therefore, according to the cell packaging of the invention, a wide range of shapes or logos, etc. can easily be externally displayed so as to be discernible by means of laser irradiation. By thus imparting discernibility and externality to the cell packaging, a labeling process for attaching a separate label to the cell packaging can be excluded.