Best Energy Product
Lead Tab Film
Material that prevents the risk of battery
explosion and maintains battery stability
Lead Tab Film Description
Secondary batteries (battery) used in electric vehicles are divided into three types: square, pouch, and cylindrical. Here, a pouch-type secondary battery consists of a positive electrode, a negative electrode, an electrolyte, and a pouch film and lead tab, which are packaging materials. The lead tab serves to connect the negative and positive plates of the secondary battery to the outside by electric power. It is the lead tab film that seals the lead tab and the pouch film, which is a packaging material.
A cell generates heat and pressure inside while an electric current flows. This generates hydrofluoric acid (HF) gas, and there is a risk of battery explosion in case of damage to the packaging. The lead tab film is an essential material to prevent the risk of battery explosion and maintain battery stability.
Korea’s only lead tab film localization and manufacturing success
Japanese companies occupy more than 90% of the global lead tab film market.
Under these circumstances, Best Energy is the only company that specializes in manufacturing lead tab films in Korea. Best Energy has succeeded in developing lead tab films for secondary batteries through many years of polymer research.
In particular, we contributed to the localization of secondary battery materials by using all raw materials used to manufacture them only domestically.
The lead tab film manufactured in this way has been tested in the safety field by China's top three secondary battery manufacturers for 6 months and its performance has been recognized.
Products applied with the existing laminating method
Best Energy (Co-Extru) products
Best Energy's lead tab film adopts the Co-Extru method that separates three layers from the extrusion stage, rather than the laminating method of laminating different materials. This film, which is divided into a skin layer and a core layer, is made of the same polypropylene material. Unlike the laminating method in which polypropylene is laminated with other plastic materials such as PET, the Co-Extru method is more suitable for packaging and sealing secondary batteries because there is no separation between different types by electrolyte.