How to Better Choose the Enclosure of Lithium Battery?

Ordinary batteries have a protective enclosure , and lithium-ion batteries are no exception. The purpose of the enclosure is to protect the internal material damage effect of the lithium-ion battery. The lithium-ion battery is a secondary battery (rechargeable battery), which mainly relies on the lithium-ion positive electrode and It moves between the negative electrodes to work, generally using lithium as the electrode material, which is the representative of modern high-performance batteries. So what is a lithium-ion battery made of? The following is explained by technicians:

Lithium-ion battery casings mainly include steel casings and aluminum casings:

1. Steel enclosure In the early days, most square lithium-ion batteries were steel enclosure, which were mainly used for mobile phone batteries. Later, due to the light weight, low energy consumption, and poor safety of the steel case, it was gradually replaced by the aluminum case and the flexible packaging  lithium battery.

But in the column types of lithium-ion batteries, different pictures, most suppliers are in the battery steel enclosure  material, because the physical stability of the steel material, the stress is much higher than that of the aluminum enclosure  material, after each production structure optimization design, the safety device Being placed in the core of the battery, the safety of the steel column battery has reached a new level. At present, most laptop batteries are based on the steel case as the carrier.

Second, the aluminum enclosure

Aluminum case is a kind of battery case made of aluminum alloy material, which is mainly used for square lithium-ion battery. Lithium-ion battery is packaged in aluminum case, because of its light weight, it is safer than steel case.

Aluminum enclosure design, rounded square corners and two aluminum materials are generally aluminum-manganese alloys, which contain important alloying elements such as manganese, copper, magnesium, silicon, iron, etc., which play different roles in the five alloy aluminum enclosure  lithium-ion batteries. The role of copper and magnesium is to improve strength and hardness, Mn to improve corrosion resistance, if the effect of heat treatment of magnesium aluminum alloy can be improved, iron can improve high temperature strength

The aluminum enclosure material structure has significant safety performance, which can be expressed by material thickness and bulging coefficient. Lithium-ion batteries of the same capacity are lighter than steel because aluminum can be made thinner. According to the working mechanism of lithium-ion batteries, lithium ions are not intercalated during charging, and the volume of the positive electrode increases. During discharge, lithium ions intercalate from the positive electrode and expand from the negative electrode. It will cause solid expansion, and the expansion coefficient can be reduced by appropriate alloy formulation.

What material is the casing of a lithium-ion battery made of? That's it. To sum up, steel enclosure  and aluminum enclosure  have their own advantages. When we choose the lithium-ion battery case, we must also choose according to the specific situation. Of course, choosing the electronic equipment case of yongucase is the best choice. Welcome to visit www.yongucase.com. We have a variety of standardized electronic equipment enclosures, multiple specifications and sizes, and sufficient stock. You will always find the ideal electronic equipment enclosure here.