Slot-die Coating Machine with Multiple Closed-loop Intelligent Control

Product Overview

The machine performs cathode/anode electrode coating of lithium-ion battery production. It applies the mixed cathode/anode slurries onto copper and aluminum foils according to process requirements, ensuring that dimensions, surface density, and other parameters are within the designed specifications. The coated electrode is then dried and re-wound into rolls.

Features

Air outlet wind speed uniformity ±1.5%; Oven wind speed uniformity ±3%;

Oven temperature uniformity ±2%;

Special dynamic tension control with an accuracy of ±1N to improve high-speed web-passing stability;

The gap between the coating head and the back roller reaches micrometer level accuracy, with an adjustment accuracy of 0.1μm, and the positioning repeatability is ≤1μm;

Configured with wet and dry foil/electrode thickness measurement systems.

Standard Configuration

Unwinding unit: Dual-shaft automatic roll change and splicing, pneumatic V-block, automatic centering for A/B shafts, tail material detection;

In-process correction: Infrared sensors, automatic emitter position adjustment;

Coating unit: Web breakage detection, manual coating head adjustment;

Drying oven: Each drying oven is equipped with a small exhaust fan, 5 drive rollers, and chamber electric lifting function;

Outfeed unit: Air cooling and water cooling;

Material supply system: The main material is supplied by a single pump, going through capsule filter and iron removal filter; Ceramic material is supplied by one pump for coating on the two edges;

Rewinding unit: Dual-shaft automatic roll change and splicing, pneumatic V-block, and auxiliary rewinding press roller.

Optional Configuration

Single-floor coating / Double-floor tandem coating / Single-floor double-side simultaneous coating / Multi-floor single-side coating/ Multi-functional coating;

Intelligent closed-loop horizontal and vertical surface density control;

Oven closed-loop control;

NMP recovery / Residual heat recovery system;

Automatic taping;

New automatic web threading unit in the oven.

Technical Parameters

Product Parameter

Item

Parameter

Foil width

Max 1500mm

Roll diameter (unwinding)

Max 1200mm

Roll diameter (rewinding)

Max 1200mm

Coating speed (continuous)

Max 140m/min

Coating speed (intermittent)

Max 60m/min (subject to gap dimensions)

Coating length accuracy (intermittent)

±0.5mm

Coating width accuracy (continuous)

±0.3mm

Coating method

Slot die coating

Foil thickness

4μm

Drying method

Steam/Thermal oil/Electrical heating/Thermal radiation/Infrared radiation/Optical drying

Two-side surface density accuracy

±1%