PP/PE/PP type battery separator

Advantages:

It combines the high strength and heat resistance of PP and the good flexibility and pore-closing characteristics of PE.

It can better adapt to the changes of the battery under different working conditions, especially when the temperature changes greatly, the pore-closing performance of PE helps to improve the safety of the battery.

Disadvantages:

The manufacturing process is relatively complex, and the cost is higher.

Due to the multi-layer composite structure, there may be a potential risk of interlayer separation in the long-term use process.

Compared to the pure PP separator, its air permeability and other properties may require more fine-tuning.