The battery aluminum foil refers to the aluminum foil for lithium ion battery. The battery aluminum foil is used as the current collector of the lithium ion battery. Normally, the lithium-ion battery industry uses the aluminum foil as the positive electrode current collector.
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. What are the quality requirements of battery aluminum foil?
1. The surface of the aluminum foil is clean, flat, of uniform color and without obvious roll marks, pitting, pinholes, and corrosion marks.
2. The aluminum foil surface has no rolling defects such as creases, mottling, bright lines, etc.
3. There is no oil on the surface, no serious oil odor, and no visible oil spots.
4. As for the surface tension, the dyne pen test is not less than 32 dyne.
The latest research in the lithium-ion battery industry has found that by etching and roughening the surface of the aluminum alloy foil used as the positive collector, the the charge and discharge characteristics of the battery can be improved.
Haomei Aluminum is a big supplier of battery aluminum foil. The common aluminum foil for lithium ion battery are 1060, 1050, 1145 and 1235 aluminum foil. The common tempers are O, H14, H22, H18,etc. 1235 aluminum foil is the most commonly used battery foil in the market. Welcome to leave message below to get a best price.
Original source: https://www.hm-alu.com/a/the-quality-requirements-of-aluminum-foil-for-lithium-ion-battery.html
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