Battery aluminum foil

Introduction to Battery aluminum foil:

The battery aluminum foil is used as a current collector for lithium ion batteries. In general, the lithium ion battery industry uses rolled aluminum foil as a positive electrode current collector. The thickness of the rolled foil varies from 10 to 50 microns. Commonly used lithium battery pure aluminum foil has 1060, 1050, 1145, 1235 and other alloy grades, such as -O, H14, -H24, -H22, -H18.

Battery aluminum foil quality requirements:

The surface of the first aluminum foil has uniform color, cleanness and flatness, and no obvious roll marks, pitting, pinholes and corrosion marks;
The second aluminum foil surface has no rolling defects such as creases, spots, and bright lines;
The third aluminum foil has no color difference on the surface;
The fourth surface is oil-free, has no serious oil odor, and has no oil spots visible to the naked eye;
Fifth surface tension, Dyne pen test is not less than 32 dyne;

Battery aluminum foil appearance requirements:

First, the aluminum foil coil is wound tightly, the end surface is flat and clean, and the edges are smooth;
Second, the aluminum foil roll layer should not exceed ±1.0mm;
Third, the width of the aluminum foil roll core is greater than or equal to the foil width, and generally the length of the two ends of the die does not exceed 5 mm of the foil width;
Fourth, the aluminum foil should be wrapped around the center of the die;
Fifth, the joint portion has a clear joint mark at the two ends of the aluminum coil.

Battery aluminum foil features:

1. The aluminum foil rolling mill equipment is equipped with an advanced thickness automatic control system and a plate shape automatic control system to achieve precise control of the plate type and thickness;
2. Select aluminum foil blanks, strictly control the hydrogen content of the billet, the amount of non-metallic slag and grain size, and ensure product quality from raw materials;
3. Adopt advanced on-line degreasing technology to ensure the cleanliness of aluminum foil on the basis of ensuring the mechanical strength of aluminum foil.