Lithium Battery Foil


Specification: 0.012-0.02*420-1250

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Lithium Battery Foil Description

We can provide Battery Aluminum foils for Automotive vehicle, Bus, Cell phone, Electric tools &Apparatus etc. With a minimum thickness of 12 microns. Also we can do carbon coating on the surface of the Battery Aluminum Foil.

The tensile strength of our high strength battery aluminum foil can reach 300N/mm2, with an elongation of more than 4%. Also the surface wettability can be more than 32dyne, surface flatness variation is less than 10I, both meet the industry highest standard.

Characteristics of Lithium Battery Foil

The production of battery aluminum foil must fully consider the thermal conductivity, electrical conductivity and mechanical strength of the aluminum foil. Using special blanks, in a clean and dust-removing plant environment, manufactured by high-precision imported rolling mills with online profile rolls and Siemens control systems.

● The aluminum foil rolling mill equipment is equipped with an advanced automatic thickness control system and an automatic shape control system to achieve precise control of the shape and thickness;

● Select aluminum foil blanks, strictly control the hydrogen content of the blanks, the amount of non-metallic slag and the grain size, and ensure the product quality from the raw materials;

● Using advanced online degreasing technology to ensure the cleanliness of the aluminum foil on the basis of ensuring the mechanical strength of the aluminum foil.

Technical Parameter of Mingtai Al. Lithium Battery Foil







Technical Requirements


Strength>180Mpa, elongation >1.5%, wetting > 31 Dyne

Foil Surface

No oil contamination, pinholes, bright, convex-concave point,
scratches, foreign matter, wrinkle and etc.


smooth, side waves less than 6 pcs / m, wave height less than 0.3mm

Where is the aluminum foil in the lithium battery?

Lithium batteries usually have cylindrical and square shapes. The inside of the battery adopts a spiral wound structure, and a very fine and highly permeable polyethylene film separator is used to separate the positive and negative electrodes. The positive electrode includes a current collector composed of lithium cobalt oxide (or lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil. The negative electrode is composed of a current collector composed of graphitized carbon material and copper foil. The battery is filled with organic electrolyte solution, and is also equipped with a safety valve and PTC components (partially cylindrical) to protect the battery from damage in abnormal conditions and output short circuits.

How to choose high-quality battery aluminum foil

Quality requirements

1.The surface of the aluminum foil is uniform in color, clean, and flat, without obvious roll marks, pitting, pinholes, and corrosion marks;

2.There are no rolling defects such as creases, mottling, bright lines, etc. on the surface of the aluminum foil;

3.There is no color difference on the surface of the aluminum foil;

4.No oil on the surface, no serious oil odor, and no visible oil spots;

5.Surface tension, dyne pen test is not less than 32 dyne.

Appearance requirements

1.The aluminum foil coil is wound tightly, the end surface is flat and clean, and the edge is smooth;

2.The staggered layer of aluminum foil shall not exceed ±1.0mm;

3.The width of the aluminum foil roll tube core is greater than or equal to the foil width, and generally the length of the two ends of the tube core does not exceed the foil width of 5mm;

4.The aluminum foil should be wrapped around the center of the tube core;

5.The joint part has clear joint marks on the two ends of the aluminum coil.

But under normal circumstances, the battery aluminum foil produced in the same batch may also have uneven quality. Therefore, choosing a reliable battery aluminum foil supplier is the most important thing. Mingtai Aluminium is a fully integrated aluminum company that provides all kinds of aluminum products and technical solutions. We have been providing high-quality battery aluminum foil to major companies around the world. Our product line includes high-purity etched Al foil and battery-grade foils made from various alloys (1050,1060,1070,1100,1235). If you have any needs, please contact us and we will try our best to provide you with suitable battery aluminum foil.

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