Briefly describe the dry single drawing process of lithium battery separator
Lithium-ion battery separator dry single drawing process
Feeding: raw materials such as PE or PP and additives are pretreated according to the formula, and then transported to the extrusion system.
Casting: The pretreated raw materials are melted and plasticized in the extrusion system, and then extruded from the die, and the melt is casted to form a base film with a specific crystal structure.
Heat treatment: After heat treatment of the base film, a hard elastic film is obtained.(Lithium - Ion Battery Equipment)
Stretching: The hard elastic film is cold-stretched and hot-stretched to form a nanoporous membrane.
Slitting: The nano-microporous membrane is cut into finished membranes according to the customer's specifications.
Wet Asynchronous Stretching Process
Feeding: The raw materials such as PE and pore former are pretreated and transported to the extrusion system according to the formula.
Casting: The pretreated raw materials are melted and plasticized in a twin-screw extrusion system and then extruded from the die head, and the melt is casted to form a cast slab containing a pore-forming agent.
Longitudinal stretching: The cast slab is longitudinally stretched.
Lateral stretching: the cast slab after longitudinal stretching is laterally stretched to obtain a base film containing a pore-forming agent.
Extraction: The base film is solvent-extracted to form a base film without a pore-forming agent.
Shaping: drying and shaping the base film without pore-forming agent to obtain a nano-microporous film.
Slitting: The nano-microporous membrane is cut into finished membranes according to the customer's specifications.
The performance of the diaphragm product is affected by the matrix material and the manufacturing process. The stability, consistency and safety of the separator have a decisive impact on the discharge rate, energy density, cycle life and safety of lithium-ion batteries.
Feeding: raw materials such as PE or PP and additives are pretreated according to the formula, and then transported to the extrusion system.
Casting: The pretreated raw materials are melted and plasticized in the extrusion system, and then extruded from the die, and the melt is casted to form a base film with a specific crystal structure.
Heat treatment: After heat treatment of the base film, a hard elastic film is obtained.(Lithium - Ion Battery Equipment)
Stretching: The hard elastic film is cold-stretched and hot-stretched to form a nanoporous membrane.
Slitting: The nano-microporous membrane is cut into finished membranes according to the customer's specifications.
Wet Asynchronous Stretching Process
Feeding: The raw materials such as PE and pore former are pretreated and transported to the extrusion system according to the formula.
Casting: The pretreated raw materials are melted and plasticized in a twin-screw extrusion system and then extruded from the die head, and the melt is casted to form a cast slab containing a pore-forming agent.
Longitudinal stretching: The cast slab is longitudinally stretched.
Lateral stretching: the cast slab after longitudinal stretching is laterally stretched to obtain a base film containing a pore-forming agent.
Extraction: The base film is solvent-extracted to form a base film without a pore-forming agent.
Shaping: drying and shaping the base film without pore-forming agent to obtain a nano-microporous film.
Slitting: The nano-microporous membrane is cut into finished membranes according to the customer's specifications.
The performance of the diaphragm product is affected by the matrix material and the manufacturing process. The stability, consistency and safety of the separator have a decisive impact on the discharge rate, energy density, cycle life and safety of lithium-ion batteries.
