Automatic Roll-to-Roll Slitting Machine for Lithium-ion Battery Electrode Making

Component

Description

Unwinding Shaft

3-inch air expanding shaft (9+1 lug bladder)

Max Unwind Ø

450 mm

Guiding Control

Manual/Auto mode switch

Guiding System

Photoelectric web guide, ±50 mm stroke, ±0.1 mm accuracy

Tension System

High-sensitivity tension sensor + unwind brake with PLC for closed-loop tension control

Tension Accuracy

±2 N

Splicing Platform

Chrome-plated surface with threading grooves; double pressure bars with pneumatic clamping

Component

Description

Knife Unit

Adjustable gap between top and bottom knives (via spacer replacement); adjustable engagement depth

Speed Display

Upper/lower knife line speed ratio shown on HMI

Spacer Design

Precision spacers of different widths ensure consistent slitting width

Knife Guide Rollers

Infeed rollers installed on the knife frame

Drive Method

Top and bottom knives driven independently by servo motors

Component

Description

Rewind Shaft

Two sets of Φ3″ (ID Φ76.2 mm) differential shafts (core provided by customer)

Max Rewind Ø

450 mm

Tracking Rollers

One set per rewind shaft to adapt to roll diameter variation

Component

Description

Knife Dust Collection

Bottom knife equipped with dust removal device

Electrode Dust Collection

One set each for upper and lower electrodes post-slit

Component

Description

Upper Belt

Pneumatic roller controlled by solenoid valve to press the upper electrode during rewinding

Lower Belt

Pneumatic roller controlled by solenoid valve to press the lower electrode during rewinding

Component

Description

Upper Arm

Pneumatically controlled pressure arm with chrome-plated roller

Lower Arm

Pneumatically controlled pressure arm with chrome-plated roller

Component

Description

Rewind Drive

Motor drives upper and lower rewind shafts via synchronous belt/pulley system

Traction Drive

Motor drives traction and transition rollers via synchronous belt/pulley system

Section

Description

Unwind Control

Controls web guiding and splicing table pressure rods

Rewind Control

Main control section with touchscreen interface

Section

Description

Unwinding Tension

Controls tension during unwinding

Post-slit Tension

Open-loop control of tension after slitting

Name

Brand

Origin

PLC

Panasonic

Japan

HMI Screen

Konlyon Tongtai

Taiwan, China

Tension Control System

Aibo / KRD

China

Tension Sensor

Aibo / KRD

China

Magnetic Powder Clutch

Kejia

China

Rewind Motor

Geared Motor

China

Main Drive Motor

Geared Motor

China

Pneumatic Solenoid Valve

AIRTAC

Taiwan, China

Cylinder

AIRTAC

Taiwan, China

Proportional Valve

SMC

Japan

Rotary Encoder

OMRON

Japan

Power Protection Circuit Breaker

Chint/NXB-63 3P

China

Linear Guide Rails

HIWIN

Taiwan, China

Bearings

NSK / Havaro / Imported

Japan / China / Imported

Differential Shaft

China

Dust Collector System

China

Knife Cart

XHL-1000 (self-made)

China

Knife Holder

China

Roll diameter

max Φ450 mm

Roll weight

max 320 kg

Core inner diameter

Φ3″ (Φ76.2 mm)

Foil width

max 680 mm

Foil thickness

copper 4.5–20 μm; aluminum 9–25 μm

Coated material max width

max 650 mm

Slitted electrode thickness

50–200 μm

Item

Specification

Unwinding Shaft

3-inch air expanding shaft

Maximum Unwinding Diameter

Max φ450mm

Web Feeding Method

Manual threading

Unwinding Tension Control

Automatic closed-loop tension control system

Tension Control Range and Accuracy

20–200N, ±2N

Slitting Method

Multi-strip simultaneous rotary disc cutting

Rewinding Method

Dual upper and lower slip shaft rewinding units

Slip Shaft

Low-friction slip shaft (#14)

EPC Controller Stroke and Accuracy

±50mm, ±0.1mm

Mechanical Speed

Max 50m/min (continuously adjustable)

Slitting Acceptance Speed

10–18mm: 20m/min; Above 18mm: 30–50m/min

Minimum Slitting Width

10mm

Slitting Width Accuracy

±0.05mm (Edge trim width ≥2mm, fully coated)

Knife Holder Configuration

Two combined knife holders: one configured with a full set of spacers for 25-strip slitting (with knife holders and blades), and the other with 26 knife holders only. (Note: Customer’s universal spacers of the same specification are compatible with this machine’s fixed spacers.)

Knife Holder Transfer Cart

One provided per machine

Dust Collection

Dust collection at material receiving platform, knife holder, and both sides of slit electrodes (requires brush roller structure). Integrated into customer’s central dust collection system. Interface reserved: φ90mm

Demagnetization Configuration

Equipped with four rectangular magnets (10,000 Gauss) post-slitting. Adjustable spacing between 3–15mm

Pressure Roller Configuration

Standard: 25 sets/machine. Model: L20×40mm. Compatible with equipment from this factory

Slitting Knife Brand

Domestic alloy blade, φ100mm disc bladeMinimum usable diameter: φ96mmSupplied blade shim thicknesses: 9.8mm / 9.55mm / 9.3mm / 9.05mm / 8.8mm / 8.55mm / 8.3mm

Electrode Burrs (Including Coating and Foil)

Longitudinal burrs ≤5μm (measured vertically beyond the coating); Lateral burrs ≤7μm (measured horizontally beyond the coating). Incoming materials must be free of removable slurry or visible serration.

Electrode Serpentine Deviation (Slitting Direction Curvature)

Test method: Lay the sheet flat. Fix both ends aligned to a 1-meter ruler. Use a transparent ruler to measure max distance between sheet and ruler: ≤±0.3mm/1000mm. Must ensure good post-calendering flatness, no deformation, sufficient edge trim, no powder loss, no waviness, no stretching, no cracking.

Electrode Edge Waviness

Test method: Lay flat, measure using optical instrument: ≤±0.5mm. Must meet same quality standards as above.

Intelligent Counting Features

Total slitting length, unwind/rewind tension, upper/lower slit speed ratio, friction coefficient, blade life, machine speed, total meters slit, runtime—all adjustable via touchscreen

Electrical Requirements

3-phase, 5-wire, 380V / 30A / 50Hz

Air Consumption

150L/min

Total Power

Approx. 8kW; compressed air pressure >5kg/cm²

Air Quality Requirements

Water-free, oil-free, filtered clean air

Operating Environment

Temperature: 20–40°C; Humidity: 30–70%

Rewinding Width

Min 10mm – Max 680mm (using slip shaft #14)

Rewinding End Face Alignment Accuracy

±0.5mm

Rewinding Tension Control Range

Per shaft: 5–50N

Edge Trim Handling

Trim width: 3–5mm (must be fully coated material)

Machine Utilization Rate

≥95%

Machine Weight

Approx. 3.5T (Customer floor bearing capacity: 600kg/m²)

Machine Color

Frame and electrical cabinet in warm gray; other parts chromed (custom colors require customer-provided color sample)

Accessories Supplied

Chinese user manual, maintenance manual, and manuals for purchased components

Noise Level

≤80 dB measured 1m from winding area (excluding material-related noises like tape peeling)

Note

Customer must provide one roll of electrode sheet (approx. 500m, as applicable for positive/negative) for machine testing