The battery aluminum foil has typical alloy 1060, 1070, 1235 aluminum foil, the temper is H18, the thickness is 0.018-0.2 mm, and width is 100-1600 mm. The consistency of thickness and surface density shall be controlled within ± 2%, the surface tension of battery aluminum foil is greater than 32 dyne. The tensile strength of aluminum foil is 200-210mpa, ensuring the processing performance of the aluminum foil. The elongation is 1.5% – 4.0%, ensuring the mechanical properties of aluminum foil.
Recently, a lithium ion battery industry research has found that the surface of an aluminum (Al) alloy foil used as a positive electrode current collector of a lithium ion rechargeable battery can be etched and roughened to improve the charge and discharge characteristics of the battery. The adhesion between the battery shell aluminum foil and the active material after the surface roughening treatment is significantly higher than that of the aluminum foil which has not been surface-treated. Therefore, aluminum foil for lithium batteries also plays an important role in the fields of hybrid batteries and rechargeable batteries for electric vehicles.
The application advantages of battery aluminum foil are:
1, Significantly improve battery pack consistency and significantly reduce battery composition;
2, Significantly reduce the dynamic internal resistance increase of the battery core;
3, Improve the consistency of the battery pack;
4, Extend the life of the battery pack;
5, Significantly reduce the battery composition.