Battery Outer Label Design for Enhanced Reliability
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Summary
Problems
Existing battery outer labels are prone to impairment due to leaching of vapor-deposited metal layers during storage at high temperature and high humidity, leading to local cell formation and appearance issues, with previous solutions either causing wrinkling, increased manufacturing costs, or limited design constraints.
Innovation solutions
A battery outer label with a heat-shrinkable resin film base material and a vapor-deposited metal layer, optimized for water vapor permeability between 14 to 30 g/m2·24 h and pH range of 5.9 to 8.3, to prevent moisture penetration and leaching, while maintaining durability and reliability.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a heat-resistant, electrically insulating layer is provided between the vapor-deposited metal layer and the adhesive layer to prevent local cell formation, then the reliability is improved, but the outer label becomes wrinkled or loosened during storage at high temperature
Why choose this principle:
The patent introduces a heat-resistant resin layer as an intermediary between the vapor-deposited metal layer and the adhesive layer. This intermediate layer serves as a mediator that prevents direct contact between the metal layer and adhesive while maintaining structural integrity during heat shrinkage, thus preventing both local cell formation and wrinkling.
Principle concept:
If a heat-resistant, electrically insulating layer is provided between the vapor-deposited metal layer and the adhesive layer to prevent local cell formation, then the reliability is improved, but the outer label becomes wrinkled or loosened during storage at high temperature
Why choose this principle:
The outer label employs a composite structure consisting of multiple layers: heat-shrinkable resin film, vapor-deposited metal layer, heat-resistant resin layer, and adhesive layer. This composite material approach allows each layer to perform its specific function while working together to prevent both electrochemical reactions and physical deformation.
Application Domain
Data Source
AI summary:
A battery outer label with a heat-shrinkable resin film base material and a vapor-deposited metal layer, optimized for water vapor permeability between 14 to 30 g/m2·24 h and pH range of 5.9 to 8.3, to prevent moisture penetration and leaching, while maintaining durability and reliability.
Abstract
A battery outer label 1 including a heat-shrinkable resin film such as of polyethylene terephthalate as a base material 2 , a printing layer 5 and a protective layer 6 formed on a front surface of the base material 2 , and a vapor-deposited metal layer 3 and an adhesive layer 4 formed on a back surface of the base material 2 , wherein the battery outer label 1 has a water vapor permeability in the range of 14 to 30 g/m 2 ·24 h.