Aluminum Laminated Film for Pouch Cell Case

Technical Specification:

1. Material Composition:
   • Outer Layer: Nylon (Polyamide, PA).
     • Provides mechanical strength, puncture resistance, and flexibility.
   • Middle Layer: Aluminum Foil.
     • Acts as a barrier against moisture, oxygen, and light.
   • Inner Layer: Cast Polypropylene (CPP) or Polyethylene (PE).
     • Ensures heat-sealing capability and chemical compatibility with battery components.
2. Physical Dimensions:
   • Width: Typically 200–500 mm (customizable based on cell size).
   • Thickness: Commonly 90–120 µm (dependent on application requirements).
   • Roll Length: Varies; standard options range from 50–200 meters.
3. Barrier Properties:
   • Moisture Barrier (WVTR): Excellent water vapor transmission resistance, typically <0.1 g/m²/24h.
   • Oxygen Barrier (OTR): Blocks oxygen penetration to protect sensitive electrode and electrolyte materials.
   • UV and Light Protection: Aluminum layer ensures complete light impermeability.
4. Thermal Properties:
   • Operating Temperature Range: Reliable performance from -20°C to 120°C.
   • Heat-Sealing Temperature: Effective sealing at 170°C to 200°C, depending on inner layer material.
5. Mechanical Properties:
   • Tensile Strength:
     • Outer nylon layer ensures durability during handling and assembly.
   • Flexibility:
     • Multi-layer structure supports bending and shaping without delamination or cracking.
6. Chemical Resistance:
   • Inner polypropylene or polyethylene layer resists degradation from lithium-ion electrolytes.

Applications:

1. Primary Applications:
   • Pouch Cell Packaging:
     • Encapsulates lithium-ion and solid-state battery materials, providing airtight and moisture-proof housing.
2. Industries:
   • Battery Manufacturing:
     • Used in the production of lithium-ion, solid-state, and polymer batteries.
   • Electric Vehicles (EVs):
     • Essential for lightweight, high-capacity pouch cell batteries in EV battery packs.
   • Consumer Electronics:
     • Batteries for smartphones, laptops, tablets, and other portable devices.
   • Energy Storage Systems (ESS):
     • Applied in renewable energy storage and grid-scale systems.
3. Advantages for Applications:
   • Superior Barrier Properties:
     • Protects battery materials from moisture, oxygen, and light, extending lifespan and performance.
   • Lightweight Design:
     • Reduces overall battery weight, critical for portable electronics and electric vehicles.
   • Thermal Stability:
     • Withstands temperature variations during assembly and operation.
   • Customizable Dimensions:
     • Can be tailored for specific cell sizes and designs.
4. Specialized Uses:
   • High-Energy-Density Batteries:
     • Suitable for batteries requiring compact and lightweight casings with excellent environmental protection.
   • Solid-State Battery Development:
     • Ideal for packaging solid-state battery chemistries.
   • Prototype and Research:
     • Enables flexible designs for experimental pouch cell configurations.
5. Challenges and Mitigation:
   • Heat-Sealing Precision:
     • Improper sealing may lead to electrolyte leaks or poor encapsulation.
       • Solution: Use calibrated heat-sealing equipment with precise temperature and pressure control.
   • Handling Sensitivity:
     • Scratches or folds can compromise the barrier properties.
       • Solution: Handle with care and store in protective packaging to prevent damage.

Summary:

Aluminum Laminated Film for Pouch Cell Cases is a high-performance packaging material designed to provide moisture, oxygen, and light barriers while ensuring durability and thermal stability. Its multi-layer structure, comprising nylon, aluminum, and polypropylene or polyethylene, makes it essential for lithium-ion and solid-state battery production. This film is critical for applications in electric vehicles, consumer electronics, and renewable energy storage systems.