What are the three types of lithium-ion battery enclosure ？

The processing material of battery enclosure  is mainly aluminum alloy material. Aluminum alloy has low density but high strength. It is close to or better than high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is only second to that of steel.

The alloy material structure of battery enclosure  has significant safety performance considerations, which can be expressed by material thickness and bulge coefficient. The reason why the tws battery with the same capacity is lighter than the steel enclosure  is that the aluminum enclosure  can be made thinner. From the perspective of the working mechanism of lithium battery, when charging, lithium ions are de embedded, and the positive electrode volume expands; When discharging, lithium ions are embedded from the positive electrode and the negative electrode expands; Will cause solid expansion, and the bulge coefficient can be reduced through appropriate alloy formula.

The battery cnc electronics enclosure is designed with square corners and rounded corners. The aluminum enclosure  is generally made of aluminum manganese alloy, which mainly contains Mn, Cu, Mg, Si, Fe, etc. These five alloys play different roles in the aluminum enclosure  of the tws battery. For example, Cu and Mg improve the strength and hardness, Mn improves the corrosion resistance, Si enhances the heat treatment effect of magnesium containing aluminum alloy, and Fe improves the high temperature strength. The reason why aluminum alloy is used in battery enclosure  processing and production is that it is light, safe, and can also improve high temperature strength.

The stretching material of battery enclosure  is generally divided into aluminum enclosure  and steel enclosure . The aluminum material is easy to process and form, has high temperature corrosion resistance, good heat transfer and conductivity. The aluminum power battery acrylic electronics enclosure

 (except for the enclosure  cover) can be stretched and formed at one time. Compared with the stainless steel enclosure , the welding process at the bottom of the box can be omitted, and the weld quality will not decline due to the burning of metal elements during welding.

Tensile advantages of aluminum battery enclosure : lon g service life. The simulated aging test shows that its service life is more than 20 years, far exceeding traditional materials such as metal. It is flame retardant, smokeless and non-toxic. Aluminum is a flame retardant material, with a flame retardant grade of FV0, a smoke generation grade of 15 (smoke generation grade 1-100) under high temperature ignition, non-toxic smoke, and a toxicity grade of ZA1 (quasi safety grade I).

Aluminum has excellent anti-aging properties. The anti-aging performance test shows that the maximum aging thickness of the surface is 20 years and less than 50 μ m。 The minimum thickness of most boxes is 5 mm, which is less than 1% of the box thickness, so there is no obvious impact on the mechanical properties of the box.