What material is made of the battery case for

As one of the important components of the battery shell is often the most overlooked. Many people do not know what material material is used in the battery shell, today Mottcell new Energy will explain to you the commonly used battery shell materials

1. The best-selling battery shell on the market now is the aluminum alloy shell, which is also one of the metal types. Aluminum alloy density is low, but the strength is relatively high, close to or beyond high quality steel, good plasticity, can be processed into a variety of profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, widely used in industry, the use is second only to steel.

2. The structure of the lithium battery shell alloy material has significant safety performance considerations, which can be expressed by the material thickness and swelling coefficient. Lithium batteries of the same capacity are lighter than steel shells because the aluminum shells can be made thinner. From the working mechanism of lithium battery, when charging, lithium ion unembedded, the positive electrode volume expansion, discharge, lithium ion from the positive electrode embedded, the negative electrode expansion; will cause the solid expansion, the swelling coefficient can be reduced by the appropriate alloy formula.

3, There is a stainless steel rigid shell, this material made of battery shell is also more. Stainless steel is the abbreviation of stainless acid-resistant steel, the weak corrosion medium such as air, steam, water or stainless steel is called stainless steel; and the chemical corrosion resistant medium (acid, alkali, salt) corrosion steel is called acid-resistant steel.