Tata Steel Group’s Soft-Pack Battery Aluminum Foil is engineered for lithium-ion and polymer lithium pouch cell packaging, offering excellent barrier performance, superior mechanical properties, and reliable processing performance for composite film lamination. This aluminum foil functions as the middle foil layer in a typical three-layer aluminum-plastic composite film (nylon layer + aluminum core foil + heat-seal layer) and plays a critical role in preventing moisture ingress and electrolyte leakage, ensuring long-term battery safety and performance.
Tata Steel Group’s Soft-Pack Battery Aluminum Foil is engineered for lithium-ion and polymer lithium pouch cell packaging, offering excellent barrier performance, superior mechanical properties, and reliable processing performance for composite film lamination. This aluminum foil functions as the middle foil layer in a typical three-layer aluminum-plastic composite film (nylon layer + aluminum core foil + heat-seal layer) and plays a critical role in preventing moisture ingress and electrolyte leakage, ensuring long-term battery safety and performance.
Tata Steel Group Soft-Pack Battery Aluminum Foil is a premium packaging material designed specifically for soft-pack lithium-ion and polymer lithium batteries. Featuring high-purity 8021 and 8079 aluminum alloys, the foil provides outstanding barrier protection, cold stamping formability, excellent puncture resistance, and stable dimensional performance. Its clean, smooth, oil-free surface enables efficient lamination with nylon and heat-seal layers for high-quality aluminum-plastic composite films used in EVs, consumer electronics, electric bikes, energy storage systems, and more.
Key benefits include:
Superior barrier properties for moisture, oxygen, and electrolyte leakage protection.
Enhanced cold forming and stamping performance to support high-speed production.
Excellent elongation and puncture resistance, helping reduce defects during pouch assembly.
Stable mechanical strength for reliable performance during battery cycling and usage.
Designed for battery manufacturers focused on high-performance soft-pack cells, Tata Steel Group battery aluminum foil meets industry demands for safety, consistency, and manufacturability at scale.
| Specification Item | Details / Range |
| Product Name | Soft-Pack Battery Aluminum Foil |
| Material / Alloy | 8021 Aluminum Foil, 8079 Aluminum Foil |
| Temper Status | O, H14, H16, H18, H19, H22, H24 (customizable) |
| Thickness (mm) | 3C Battery Foil: 0.03 – 0.045 mm Power Battery Foil: 0.04 – 0.08 mm (varies by application) |
| Width (mm) | 100 – 1600 mm (customizable) |
| Length | Coil form or as per customer request |
| Surface Finish | Clean, smooth, oil-free, optimized for lamination |
| Application | Aluminum-plastic composite film for soft-pack lithium battery packaging |
| Third-Layer Structure | Nylon (outer) + Aluminum Foil (core) + Heat-seal layer (inner) |
| Primary Function | High barrier against moisture and electrolyte penetration; mechanical support for pouch cell envelopes |
In the structure of aluminum-plastic composite films, the aluminum foil acts as the critical barrier layer that effectively prevents the ingress of external moisture and the egress of internal electrolytes, ensuring long-term operational stability and enhanced safety of soft-pack cells. ﹛This barrier performance is essential for high-cycle-life rechargeable batteries used in electric vehicles, portable devices, and large-scale energy storage systems.
Soft-pack battery aluminum foil with optimized 8021 alloy offers excellent cold-rolling formability and surface adhesion to composite layers, while the 8079 alloy provides higher strength and flexibility for demanding production processes
TATA STEEL GROUP
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