Product Overview
Battery Separator Film Slitting Equipment converts wide PE or PP separator film parent rolls into multiple finished rolls for lithium-ion battery production. The process combines controlled unwinding, web guiding, precision slitting, tension management and rewinding.
Configuration is matched to film thickness, parent-roll width, slit width, roll diameter, core size and required running speed.
Battery Separator Film Processing
Separator film is commonly processed at micrometre-level thickness. Stable web tension keeps the film controlled through unwinding, cutting and rewinding.
Automatic web guiding maintains the film position before the slitting point. Accurate alignment supports consistent finished-roll width.
Film-contact components are selected according to separator material and surface requirements. Static-control provisions can be integrated into the web path when specified.
Slitting and Rewinding
Slitting Width
Blade positions are arranged according to the required finished widths. Multiple rolls can be produced from one parent roll within the effective working width.
Rewinding Control
Independent winding positions provide separate control for each finished roll. Core positioning is set according to roll width, diameter and winding format.
Tension Profile
Unwinding and rewinding tension are controlled independently. Taper tension adjusts winding pressure as the roll diameter increases.
Key Equipment Features
Tension Control
Closed-loop tension control monitors web tension during continuous processing. Settings can be adjusted according to film thickness and winding conditions.
Precision Guiding
Web guiding maintains the film path relative to the cutting position. Stable lateral positioning supports repeatable slit dimensions.
Edge Trim
Edge-trim collection can be integrated into the slitting section. The collection arrangement is matched to trim width and material handling requirements.
Technical Parameters
|
Parameter |
Reference Specification |
|
Applicable Film |
PE / PP Battery Separator Film |
|
Film Thickness |
5–25 μm |
|
Parent Roll Width |
300–1,350 mm |
|
Maximum Unwinding Diameter |
500 mm |
|
Maximum Rewinding Diameter |
400 mm |
|
Mechanical Speed |
Up to 250 m/min |
|
Operating Speed |
Up to 150 m/min |
|
Slit Width |
55–650 mm |
|
Slitting Method |
Circular Blade |
|
Rewinding Core |
3 in |
|
Power Supply |
3 Phase, 400 V, 50 Hz |
|
Ambient Temperature |
15–45°C |
Application Range
• Lithium-Ion Battery Separators
The equipment processes separator film used as the insulating layer between electrodes in lithium-ion battery cells.
• Separator Converting
Wide parent rolls are divided into controlled-width rolls for subsequent battery production processes.
• Multiple Roll Formats
Different slit widths and finished-roll diameters can be processed within the selected machine range. Blade layout and rewinding positions are configured from the required roll format.
Slitting Quality Control
• Width Accuracy
Finished width is determined by blade position, web alignment and material movement at the cutting point. The blade layout is established from the specified finished dimensions.
• Edge Quality
Cutting geometry, blade condition and web tension influence the finished edge. The slitting method is selected according to film thickness and material structure.
• Roll Geometry
Winding tension, taper control and core positioning determine roll hardness and end-face alignment. These settings are matched to the finished-roll specification.
Configuration Selection
Required film information includes material type, thickness range, parent-roll width and maximum parent-roll diameter.
Finished width, roll diameter, core diameter and the number of rolls per parent roll determine the rewinding arrangement.
Target running speed affects drive capacity, tension response and web stability. The operating range is selected from the actual film specification.
Process Compatibility
Upstream
The unwinding section receives separator film parent rolls from film production or an earlier converting process.
Downstream
Finished rolls can move to cell production, intermediate storage or subsequent separator handling operations.
Auxiliary Systems
Static elimination, edge-trim collection and online inspection interfaces can be integrated according to process requirements.
Equipment Selection Points
Film Thickness
Film thickness determines the required tension range, web-control response and slitting conditions.
Slit Width
Minimum and maximum slit widths determine blade arrangement, winding positions and the number of finished rolls from each parent roll.
Roll Diameter
Parent-roll and finished-roll diameters determine the required unwinding and rewinding capacity.
Core Size
Core diameter and core length must match the finished-roll format and downstream handling equipment.
Project Specification
Before equipment configuration, provide film material, thickness, parent-roll width, parent-roll diameter, target slit widths, finished-roll diameter, core specification and required running speed.
Electrical standard, installation conditions, static-control requirements, edge-trim handling and inspection requirements should also be included when applicable.
FAQ
Q: What separator film can the equipment process?
A: The reference range covers PE and PP battery separator film with thicknesses from 5 to 25 μm. Final processing capability is confirmed from the film specification.
Q: What determines the slit width?
A: Slit width depends on the required finished-roll dimensions, blade arrangement, working width and rewinding configuration.
Q: How is film tension controlled?
A: Unwinding and rewinding use separate tension control. Taper tension can be adjusted as the finished roll builds in diameter.
Q: Can several finished widths be produced from one parent roll?
A: Yes. Multiple blade positions can be arranged across the working width to produce different finished-roll widths within the selected configuration.
Q: What information is required for equipment selection?
A: The main inputs are film material, thickness, parent-roll width and diameter, finished-roll widths, finished-roll diameter, core size and target running speed.
Q: Can auxiliary process systems be included?
A: Static control, edge-trim collection and online inspection interfaces can be incorporated when required by the production specification.
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