Nano-grain Metallic Film Battery Packaging Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packaging materials for portable electronic devices face challenges in achieving thinner form factors, improved volumetric energy densities, safety, and reliability, while also reducing the need for shielding materials.
Innovation Solution
The use of nano-grain metallic films and micro-arched nano-grain metallic films in battery packaging, which provide enhanced strength, puncture resistance, and barrier properties against moisture and oxygen, combined with polymer films for protection and labeling, forms a robust yet thin enclosure for electrochemical cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional battery packaging materials are used, then the battery package provides basic protection, but the packaging thickness increases and volumetric energy density decreases
Solution Approach 1:
The patent employs a multi-layer composite packaging structure consisting of a polymer film layer and a metallic film layer with nanoscale grain structure. The polymer film provides baseline protection while the nanograin metallic layer adds enhanced barrier properties and mechanical strength. This composite approach achieves superior protection capability at reduced thickness compared to traditional single-material packaging, directly resolving the contradiction between packaging thickness and protection capability.
2Strength
If traditional packaging materials are used, then the structure is simple, but the strength and puncture resistance are insufficient
Solution Approach 1:
The patent transforms the metallic film from conventional micrometer-scale grain structure to nanoscale grain structure (1-100 nm). This parameter change in grain size dramatically enhances the metallic layer's strength, puncture resistance, and barrier properties. The nanograin structure creates numerous grain boundaries that impede crack propagation and material deformation, achieving superior mechanical strength without significantly increasing packaging structure complexity.
3Reliability
If thicker packaging materials are used, then safety and reliability improve, but volumetric energy density decreases
Solution Approach 1:
The patent utilizes thin-film technology to create packaging layers at the micrometer and nanometer scale. The flexible polymer and metallic films provide adequate safety and protection while occupying minimal volume. The nanograin metallic film specifically delivers high barrier properties and mechanical strength at extremely thin dimensions, enabling high volumetric energy density while maintaining safety requirements.
4Object-affected harmful factors
If more shielding materials are used, then safety improves, but the overall device size and material usage increase
Solution Approach 1:
The patent creates a synergistic composite structure where the polymer film and nanograin metallic film work together to provide comprehensive protection against moisture, oxygen, and mechanical damage. This composite system achieves superior shielding performance with reduced total material usage compared to traditional single-material approaches, as each layer contributes specific protective functions that complement one another.
Data Source
AI summary
An apparatus comprises an electrochemical energy storage device, a non-conductive film at least partially covering the electrochemical energy storage device, and a nano-grain metallic film at least partially covering the non-conductive film. The electrochemical energy storage device may include a cathode electrode layer, an anode electrode layer, and a separator layer therebetween.