Light Weight Design Pack Aluminum Housing

We choose high-quality aluminum alloy materials as the raw materials for the aluminum casing of lithium batteries. The chemical composition and physical properties of these aluminum alloy materials comply with strict industry standards. During the procurement process, we pay attention to factors such as the purity of raw materials and alloy composition ratio to ensure the quality of the final product.

Each batch of aluminum alloy raw materials must undergo strict inspection before being put into production. Inspection items include chemical composition analysis (using equipment such as a spectrum analyzer to detect the content of alloy elements), mechanical property testing (such as tensile testing, hardness testing, etc.), and appearance inspection (checking whether there are defects, scratches, etc. on the surface of the material). Only raw materials that pass inspection can enter the production process.

For some lithium battery aluminum casings suitable for the extrusion process, the inspected aluminum alloy raw materials are heated to a suitable temperature (usually around 400-500°C) and then fed into the extrusion machine. During the extrusion process, we precisely control parameters such as extrusion speed, pressure and temperature to ensure the dimensional accuracy, surface quality and internal structure uniformity of the aluminum profile. The extruded aluminum profile is quickly cooled by air cooling or water cooling to maintain its shape stability.

For some shell parts that need to be manufactured by stamping process, the cut aluminum alloy plate is placed in the stamping die. The stamping machine applies tremendous pressure to plastically deform the sheet to obtain the desired shape.

The aluminum shell is subjected to surface pretreatment, including degreasing, alkali washing, pickling and other steps to remove surface oil, oxide scale and other impurities, so that the aluminum surface is clean and activated. Then, the aluminum shell is placed as the anode into an electrolytic tank containing a specific electrolyte (such as sulfuric acid solution), and an aluminum plate or graphite is used as the cathode to pass direct current.

During the electrolysis process, an oxidation reaction occurs on the aluminum surface, forming an aluminum oxide film. By controlling parameters such as electrolysis time, current density, and electrolyte temperature, the thickness and performance of the oxide film can be adjusted. Finally, according to customer needs, the oxide film can be dyed to make the aluminum shell have different colors.