Lithium-ion battery separator production line

Unidirectional Stretching Lithium-ion Battery Separator Production Line

In the structure of lithium batteries, the separator is one of the key inner layer components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycling and safety performance of the battery, etc. A separator with excellent performance plays an important role in improving the overall performance of the battery.

GWELL specializes in manufacturing PP/PE lithium battery diaphragm dry unidirectional stretch extrusion line, the production line is equipped with our self-developed MDO (unidirectional stretch) unit, which can achieve stable and uniform stretching of products and reduce the rate of defective products.

Dry unidirectional stretching equipment includes: mixing unit - separator casting sheet - separator laminator - cold stretching unit - hot stretching unit - separator layering machine - separator slitting machine, and other peripheral equipment such as separator crusher. Kingwell Machinery can provide a complete set of production equipment and process for power battery separator.

Features of Machine

  1. Widely adapted to the general resins, such as PP, PE and etc.

  2. Uni-axial oriented film line and bi-axial oriented film line are available to manufacture.

  3. With the best-combined extrusion system, the line can produce ultra-thin, wide and even thickness film under high speed.

Characteristics of Product

The lithium-ion battery separator is a kind of nanoscale microporous high polymer material. The rechargeable lithium-ion battery is not only high energy density, long cycle life and no memory effect, but also safe, reliable and fast charging and discharging, especially conforms to the development needs of the world environmental protection and has growing usage amount in all walks of life. 

Main Applications of Product

Electric car, electric motorcycle, electric bicycle and electric tool etc. various power lithium-ion batteries, large energy storage lithium-ion batteries and various digital lithium-ion batteries.

  1. High longitudinal tensile strength and good mechanical performance;

  2. The common width of the production line is 1000-1500 mm, the specific specifications is negotiable;

  3. Micropore with low sinuosity, good permeability, good electrolyte retention and small internal resistance of battery;

  4. Good thickness uniformity and even microporous distribution are good for the consistency of the lithium-ion battery;

  5. High temperature resistance, no horizontal hot shrinkage, high film break temperature and good safety performance.