Aluminum pouch cell battery tabs?

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R. Sagayaraj

Interesting questions! The principle coatings which are applied commercially on Al cell tabs for Li-ion batteries are Zinc chromate, Zirconium oxide, and Polytetrafluoroethylene (PTFE). The thickness of the Al cell tab sheets is typically 0.25 mm or 0.5 mm. To avoid performance reduction, ensure the coatings are clean, uniform and adhere to the surface of the Al tabs. Additionally, ensure the Al cell tab surfaces are free from contaminants such as dust and oils.

Muhammad Junaid Anjum

I heard that most of the manufacturers are still using chromate conversion coatings on Al sheets

Ahmad Al Khraisat

Here are some answers to your questions regarding pouch cell battery tabs:

There are several conversion coatings that are commonly used on aluminum cell tabs for Li-ion batteries. Some of these include chromate, phosphate, and silicate coatings. Chromate coatings are the most common, but they are also the most toxic and are being phased out in many countries. Phosphate coatings are a popular alternative, as they are environmentally friendly and provide good corrosion resistance. Silicate coatings are also becoming more popular, as they are low-cost and provide good adhesion.

The thickness of the aluminum cell tabs can vary depending on the specific battery design and application. Generally, the thickness ranges from 0.1mm to 0.3mm.

To avoid performance reduction after the application of coatings on aluminum cell tabs, it is important to carefully control the coating process to ensure that the coating is uniform and free of defects. Additionally, the coating must be compatible with the other materials used in the battery, and must not interfere with the flow of ions between the electrodes. Proper storage and handling of the coated tabs is also important, as any damage or contamination can lead to performance degradation.