What are the types of surface treatment processes for aluminum shells of
power lithium batteries? What are the important types of surface treatment techniques for the aluminum shell of power lithium batteries during processing? The surface treatment process of power lithium battery aluminum shell includes powder electrostatic spraying process, electrophoretic coating process, plasma enhanced electrochemical surface ceramicization process, sanding process and other surface treatment processes. Below, the technical personnel of the battery aluminum shell manufacturer will explain to you, let's take a look at which processes are used for battery surface treatment.
1. Powder electrostatic spraying process for battery surface treatment:
The working principle of powder electrostatic spraying technology is almost identical to the electrostatic spraying method of general liquid coatings, with the difference being that powder spraying is dispersed rather than atomized. It is a coating sprayed by an electrostatic powder spray gun, which disperses and makes the powder particles negatively charged. The charged powder particles are applied to the grounded aluminum shell of a power lithium battery by air flow (or centrifugal force, etc.) and electrostatic attraction, and then heated and melted to form a film. The aluminum shell of power lithium batteries after powder electrostatic spraying is characterized by excellent corrosion resistance, acid and alkali resistance, and salt spray resistance, which is much better than that of oxidized colored profiles.
2. Electrophoretic coating process for battery surface treatment:
The electrophoretic coating process is a coating method that uses an external electric field to orient and deposit particles such as pigments and resins suspended in an electrophoretic solution onto the surface of one of the electrodes. The aluminum shell of power lithium batteries has the characteristics of water solubility, non toxicity, and easy automation control. After electrophoretic coating process, the surface gloss is soft and can resist the invasion of acid rain from cement and mortar.
Power lithium battery aluminum shell surface treatment process treated battery
3. Plasma enhanced electrochemical surface ceramicization process for battery surface treatment:
The aluminum shell of power lithium batteries adopts plasma enhanced electrochemical surface ceramicization technology, which has excellent quality but high cost. The profiles produced by this process have more than 20 color tones, and their biggest feature is that they can be colored the same as printed fabrics according to the needs. The surface of the profiles is colorful, and the decorative effect is the best.
4. Grinding process for battery surface treatment:
The frosted surface aluminum profile prevents the disadvantage of light interference caused by the environment and conditions of bright aluminum alloy profiles in architectural decoration. Its surface is as delicate and soft as satin, and is highly favored by the market. However, existing frosted materials must overcome the unevenness of surface sand particles and the shortcomings of visible patterns.
5. Treatment methods for surface damage of aluminum shells in power lithium batteries
1. When the fork bar was transferring the profile from the discharge track to the swing bed, the profile was damaged due to excessive speed.
2. There are exposed metal or graphite bars with hard inclusions on the discharge track or bed, which can cause scratches on the surface of the profile when in contact with it.
3. Strengthen the control of ingot quality.
4. Use soft felt to isolate the profile from the auxiliary equipment, minimizing contact damage between the profile and the auxiliary equipment.
5. During production, handle with care and try to prevent dragging or flipping the profile as much as possible.
6. There are debris on the mold cavity or working belt, and the hardness of the mold working belt is low, which can cause damage to the surface of the working belt during compression and scratch the profile.
7. Improve the quality of mold repair, regularly nitride the mold and strictly implement the nitriding process.
Some battery surface treatment processes are relatively complex in the manufacturing process, while others are very simple. Overall, battery surface treatment processes are generally something that individual companies can only do. For example, many
lithium-ion battery PACK manufacturers do not do these battery surface treatment processes separately. In addition to appearing unprofessional, it also appears to be non specialized. Therefore, it is difficult to see power lithium battery aluminum shell surface treatment processes in all battery manufacturers.
