Soft-Pack Battery Material: 8021 Aluminum Foil

2026-07-08 14:00:38 Leave Us Message Author:Mingtai Aluminum

As the global demand for electric vehicles, consumer electronics, and energy storage systems continues to surge, the performance of lithium-ion battery packaging has become increasingly critical. At the heart of every soft-pack (pouch) battery lies the aluminum laminated film – and at the core of that film is 8021 aluminum foil. As a specialized barrier material, 8021 foil determines the safety, cycle life, and long-term reliability of the battery cell .

Mingtai Aluminum (Stock Code: 601677), with nearly 30 years of foil production experience and an annual capacity exceeding 1.6 million tonnes, has established itself as a leading manufacturer of 8021 battery foil, serving customers across more than 150 countries worldwide .

Key Specifications – Mingtai 8021 Battery Foil

Parameter	Specification
Alloy	8021 (Al-Fe-Si)
Temper	O, H14, H18, H19, H22, H24 -
Thickness	0.025 – 0.045 mm standard; -
Thickness Tolerance	±0.002 mm
Width	100 – 1,650 mm
Tensile Strength (O temper)	85 – 105 MPa -
Elongation (O temper)	13 – 26%
Pinhole Density	≤5 per m²
Residual Oil	≤2 mg/m² -
Wetting Tension	≥72 dyn/cm

Why Choose Mingtai Aluminum for 8021 Battery Foil?

1. Nearly 30 Years of Foil Expertise

2. Precision Manufacturing

3. 100% Quality Inspection

4. Automotive-Grade Quality Management

5. Large-Scale Capacity & Global Delivery

6. Flexible Ordering & Support

Applications

Mingtai's 8021 battery foil is used by manufacturers worldwide for :

Electric vehicle (EV) pouch cells – High energy density, long cycle life

Consumer electronics batteries – Smartphones, laptops, tablets, wearables

Energy storage systems (ESS) – Stationary battery packs with 10–20 year service life requirements

Power tool batteries – High discharge rate applications

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