Products

Product

Materials that prevent battery
explosion and maintain battery
stability

product
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.

development

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.

product test

Peeling Test, AI

The best energy lead-tab film is not a laminating method that combines different materials, but from the extrusion stage
It adopts the Co-Extru method that separates three layers.
The film, which is divided into a skin layer and a center layer, is all made of the same polypropylene material.
Unlike the laminating method that combines polypropylene with other plastic materials such as PET, the Co-Extru method is by electrolyte It is more suitable for packaging and sealing secondary batteries as there is no separation between species.