Double-Level Double-Sided Slot Die Coating Machine for Battery Electrodes

SPECIFICATIONS

Designed for continuous, high-precision electrode coating, this double-level slot die coating machine is suitable for single-side or double-side coating processes in lithium battery manufacturing.

The two-floor machine structure allows independent drying and web handling for each coating side, improving process stability in long-run production.

● Key highlights

• Slot die coating on both A and B sides of the foil

• Double-level machine layout with independent drying zones

• Stable tension control for continuous roll-to-roll operation

• Suitable for laboratory, pilot line, and production-scale applications

● Is This Slot Die Coater Right for Your Battery Process?

In real battery production, double-sided coating often brings challenges such as tension fluctuation, uneven drying, and coating inconsistency between sides.
This double-level slot die coating machine is designed to address these issues by separating coating and drying paths while keeping web handling stable throughout the entire process.

It is commonly used in:

• Lithium-ion battery electrode coating

• Power battery and energy storage battery production

• Electrode R&D and process optimization

• Pilot and small-to-medium scale manufacturing lines

If your process requires controlled coating thickness, good repeatability, and long-term operational stability, this system is a practical solution.

● Working Principle of the Double-Level Slot Die Coating System

The machine adopts a roll-to-roll slot die coating process with a two-floor physical structure.

• The metal foil is unwound at the coating section on the first level

• Slot die coating head applies slurry onto theA sideof the foil

• The coated foil passes through the first drying oven for solvent removal

• At the machine tail, a second slot die coating head coats theB side

• After B-side coating, the foil enters the second-level drying oven

• Edge alignment correction and rewinding are completed on the upper level

This layout allows double-sided coating without reversing the foil, reducing process complexity and improving coating consistency between both sides.

● Slot Die Coating Process Advantages

Slot die coating is a pre-metered coating method widely used in battery electrode manufacturing.

In actual operation, it allows the coating amount to be set in advance, making thickness and areal density easier to control.
Compared with open coating methods, slot die coating performs more stably when coating speed changes, especially in continuous production.

Main advantages include:

• Uniform coating thickness across the electrode width

• High consistency of coating weight

• Suitable for both oil-based and water-based battery slurries

• Reduced material waste during long coating runs

● Key Technical Features

• Double-level machine structure for double-sided coating

• Slot die coating heads for A and B sides

• Fully automatic PID closed-loop tension control system

• Tension control accuracy up to ±1 N

• High-speed coating with stable web handling

• Compatible with copper foil and aluminum foil substrates

Imported standard components such as Omron PLC control systems and high-precision servo motors are used to ensure long-term stability.
The proportion of imported standard parts accounts for approximately85% of the total machine components, contributing to consistent coating performance.

● Typical Battery Slurry Compatibility

Suitable for coating processes using:

• Lithium iron phosphate (LFP), oil-based or water-based

• Lithium cobalt oxide (LCO)

• Ternary materials (NCM / NCA)

• Lithium manganate

• Lithium titanate

• Graphite-based anode materials

This flexibility makes the machine suitable for different battery chemistries without major structural changes.

● Technical Specifications (Reference)

Specifications can be adjusted according to specific process requirements.

● Customization & Engineering Support

Every battery production line has different process parameters.
This slot die coating machine can be customized in terms of coating width, drying length, speed range, and control configuration.

TOB NEW ENERGY provides:

• One-stop battery equipment solutions

• Equipment customization based on customer process flow

• Engineering support from lab scale to production scale

● Why Choose TOB NEW ENERGY?

• Specialized in battery production and R&D equipment

• Extensive experience with coating, calendering, and assembly processes

• Stable and reliable equipment performance in real production environments

• Global customer support and technical communication

Looking for a double-level slot die coating solution for battery electrodes?

Contact our battery equipment engineer to discuss your process requirements.

PRODUCT DISPLAY

Explore more battery electrode coating machines