Laser-Marked Label on Laminated Power Storage Element
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Solution Overview
Problem
Conventional laminate-type power storage elements experience deterioration in display quality due to friction and exposure to solvents, leading to operational failures and damage in card electronic devices, where the label peels off or becomes faint, causing issues with identifying failure causes and damaging the device's appearance.
Innovation Solution
A laminate-type power storage element with an exterior body formed by thermocompression bonding of laminated films, featuring a laser-marked label on the boundary surface between the resin layers, which enhances chemical resistance and prevents label deterioration, ensuring the label remains legible and intact even when exposed to solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a conventional printed label is applied to the exterior body, then the label can be formed for identification, but the label deteriorates due to friction and solvent exposure causing operational failures
Solution Approach 1:
The patent replaces the conventional mechanical printing method with laser marking technology. The laser beam directly marks the label on the exterior body surface without physical contact, eliminating the deterioration caused by friction and solvent exposure that affects traditionally printed labels. This substitution of marking methodology resolves the contradiction between maintaining label legibility and ensuring operational reliability.
Solution Approach 2:
The patent changes the physical and chemical parameters of the label formation process by using laser energy instead of chemical inks or adhesives. The laser marking creates a permanent, solvent-resistant mark by altering the surface properties of the exterior body material at the label location, thereby preventing label deterioration while maintaining readability and operational reliability.
2Loss of information
If the label is formed on the exterior body surface, then identification is enabled, but the label peels off or becomes faint damaging the device appearance
Solution Approach 1:
The patent replaces adhesive-based label application with laser surface marking. The laser directly etches or alters the exterior body surface to create the label, eliminating the peeling issue entirely since no adhesive is involved. This also prevents blurring from solvent exposure, as the laser-marked label is chemically resistant, thereby maintaining device appearance while ensuring label visibility.
Solution Approach 2:
The laser beam acts as an intermediary that transfers information directly onto the exterior body surface without requiring physical label materials. This intermediary process creates a permanent mark that is integrated into the surface structure, preventing both peeling and blurring while maintaining label visibility and device appearance.
3Strength
If thermocompression bonding is used to form the exterior body, then the laminated films are sealed effectively, but the label quality deteriorates under friction and chemical exposure
Solution Approach 1:
The patent applies laser marking to form the label on the exterior body before the product undergoes use or testing. This preliminary action ensures the label is already in its most durable state, resistant to subsequent friction and chemical exposure that will occur during normal operation, thereby maintaining both sealing strength and label durability throughout the product lifecycle.
Solution Approach 2:
The patent substitutes conventional label application methods with laser marking technology. The laser creates a permanent, friction-resistant, and chemically inert mark on the thermocompression-bonded exterior body, eliminating label deterioration while preserving the sealing strength provided by the thermocompression bonding process.
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 laser-marked label maintains display quality and prevents operational failures, ensuring the card electronic device's reliability and appearance are preserved, with improved chemical resistance and reduced risk of label peeling or blurring, thus enhancing the overall performance and durability of the power storage element.
Implementation Method 1
a first resin layer that has a property of transmitting a laser beam
Implementation Method 2
an exterior body that is formed in a flat bag shape by welding a first laminated film and a second laminated film by thermocompression bonding
Data Source
AI summary
A laminate-type power storage element is configured of an exterior body that is formed in a flat bag shape by welding a first laminated film and a second laminated film by thermocompression bonding, and an electrode body that is sealed inside the exterior body, the electrode body having a sheet-shaped positive electrode and a sheet-shaped negative electrode. The first laminated film and the second laminated film respectively includes a first resin layer that has a property of transmitting a laser beam, a metal foil that is layered to the first resin layer, and a second resin layer is layered to the metal foil and has a thermal weldability.