Analysis of Factors Affecting the Quality of Aluminum Shell of Power Li-ion Battery

Power lithium-ion battery aluminum shell is a kind of shell products used in high-speed railways, bullet trains, lithium battery cars and other fields. Generally speaking, in the process of processing the aluminum case of power lithium-ion battery, there will be more or less defects. Although these defects are very small, they will also affect the appearance and use of the product. The defect is mainly reflected in the small particles on the surface of the aluminum shell of the power lithium-ion battery. So, what is the reason that affects the quality of the battery aluminum shell? The following are the factors that affect the quality of the power lithium-ion battery aluminum shell explained by the Asian Land Bank technicians: The aluminum shell that powers the battery during the processing has a different surface To a certain extent, there will be some small particles. The presence of these tiny particles will cause some subtle defects on the surface of the aluminum shell of the power battery, and there will be some slight touch feeling, if it is not carefully observed or can not be touched by hand. This small defect will greatly affect the appearance of oxidation and electrophoretic coatings and profiles. The important reasons for this phenomenon are as follows: Aluminum power lithium-ion battery case 1, the reason for the formation of small particle adsorption, there are four types of fine-grained burrs on the surface of the power lithium-ion battery aluminum case, and the important reason is that the dust in the air adheres to the surface. There will be some dust, aluminum and even some water and oil in the metal castings and heating furnaces. These impurities will cause tiny particles on the surface. 2. Because the aluminum shell of the power lithium-ion battery is cast at high temperature, the aluminum shell has a too fast processing speed and high cooling strength, which causes some elements in the alloy to be unable to be transformed into the desired elements within the specified time. Because this material has a needle-like structure, it has high hardness and poor plasticity. However, the tensile strength of this manufacturing process is very low, and not only yellow rust, but also cracks will appear at high temperature. 3. Impurities in the aluminum shell of the power lithium-ion battery will affect the operation of the entire shell. During the melting process of the aluminum shell, due to insufficient refining, impurities such as soil, refining agent, paint, powder coating, oxide film, etc. are all mixed into the aluminum shell, resulting in a decrease in the quality of the aluminum shell of the power lithium ion battery. The aluminum shell of the power lithium-ion battery has granular burrs. If it is not cleaned, the handle is not good. These particles are usually accompanied by tadpole-like drags, which can be seen under the microscope. These impurities are gray and contain a lot of iron. In fact, as long as the above points are prevented during the processing, the quality of the aluminum case of the power lithium-ion battery can be improved. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analysis of 18650 lithium battery raw material mixing operation requirements