Electric heating roller press with rewinding and unwinding for Lithium-ion and solid-state battery electrodes

The roller press machine uses one or more pairs of cylindrical rollers to apply varying pressure, pressing the material through the gap between the rollers. This process makes the material's particle size more uniform, increases its density, or compresses it to achieve a specific shape. As the material passes through the rollers, the pressure between the rollers compresses it into thin sheets or blocks, ultimately meeting production requirements.

Product Overview:

The CY-H2150-E Electric Heating Roller Press Machine is designed for use in heating and rolling processes of sheet or coil materials. The rollers are heated by resistive heating rods, offering features such as eco-friendliness, high heating temperature, excellent temperature uniformity, and high rolling precision. This machine can be used independently for rolling single sheets of material, or it can be equipped with a separate winding/unwinding device for continuous rolling of coils. It is the preferred choice for heating and rolling experimental samples in the material battery industry.

Product Features:

Patented electric heating rollers with a segmented intelligent heating system, precise temperature control, and no pollution.

The rollers are made of imported high-temperature alloy steel, with surface hardness ≥ HRC62-65 and a coating thickness ≥ 10mm. After heating to 200°C, the hardness drop is less than 5%.

The electrical control box and main machine are separate, allowing for operation in glove boxes for easy maintenance.

The machine features a reverse-use structure design, allowing materials to move forward and exit from the top after the machine is laid flat, facilitating operation inside glove boxes.

The gap elimination structure ensures high rolling precision and good temperature uniformity.

PLC control with an easy-to-use HMI interface.

Standard mechanical micrometer for precise measurement.

Safety features, including protection and anti-scald design.

Purchasing Information:

If you are interested in our Electric Heating Roller Press Machine, please feel free to contact us for more information and a quote.
Phone: +86 18516380382
Email: Jimmy@cysitech.com
Contact: Jimmy Hao
WeChat: +86 18516380382
WhatsApp: +86 13939946898

Technical Parameters:

Main Components:

 Application Areas:

Metallurgy Industry: Used for pretreating ores, steel slag, and other metal materials, efficiently refining coarse materials to improve the uniformity and activity of materials during the smelting process.

Building Materials Industry: Commonly used for grinding and forming materials like cement and ceramics, crushing raw materials to a suitable size for subsequent processes, enhancing the physical properties of the finished product.

Chemical Industry: Applied in the production of fertilizers, mineral powders, etc., with precise control over particle size to meet different chemical product processing requirements.

Battery Industry: Used in the processing of lithium battery materials and electrode sheets, the electric roller press helps press and form electrode materials, improving the uniformity of the electrode surface and enhancing battery performance.

Food and Pharmaceutical Industry: For processing specific powders or granular materials, particularly for the production of high-precision pharmaceutical and food additives.

New Materials Field: As new material technologies emerge, the electric roller press is widely used in fields like graphene, nanomaterials, and ceramic composites to meet their high-precision particle size requirements. 

Application Case: 《Using Electric Heating Roller Press with Winding/Unwinding Device to Make Lithium Battery Electrode Sheets》 

Process Steps: 

1. Prepare Materials:
Prepare positive materials (e.g., lithium cobalt oxide, ternary materials) and negative materials (e.g., graphite, silicon) according to the battery design formula. Conduct preliminary preparation of conductive materials (e.g., ultrafine carbon black) and binders (e.g., polyvinylidene fluoride PVDF). Use solvents (e.g., NMP) to mix the solid materials into a uniform slurry. 

2. Make Slurry:
Mix the positive and negative materials with the conductive agent and binder in the solvent using high-speed stirring and grinding equipment until the slurry is homogeneous with appropriate viscosity. Ensure complete dispersion of the slurry to avoid air bubbles and uneven particles, as this could affect coating quality and final product quality. 

3. Coating the Substrate:
Use coating equipment (typically a doctor blade or immersion coating method) to evenly coat the prepared slurry onto aluminum foil (positive) or copper foil (negative) to form an electrode material layer. The coating thickness directly affects the battery's energy density, requiring uniform layers without bubbles or cracks.

4. Drying:
The coated electrode material must be dried to remove the solvent. The drying temperature and time depend on the solvent type and substrate characteristics. Generally, hot air or infrared heating is used to cure the coating and maintain stability. 

5. Feeding to Roller Press Machine:
After drying, the electrode sheet is rolled into a cylindrical form and sent to the electric heating roller press machine via the winding/unwinding device. Tension control is crucial during this step to prevent wrinkles or damage to the electrode material. 

6. Roll Press Forming:
In the roller press, the electrode sheet is subjected to pressure from one or more heated rollers. The temperature of the heating rollers and the pressure between the rollers need to be adjusted according to the material's characteristics. Under heating, the pressure compresses the electrode material, increasing its density and uniformity. This press process improves battery energy density and cycling life. 

7. Winding and Tension Control:
During the rolling process, the electrode sheet is precisely tensioned to ensure flatness and uniformity as it is wound. The winding device rewinds the electrode sheet back onto the core according to the set tension, ensuring the material maintains a good shape and avoiding wrinkles or damage. 

8. Cutting and Trimming:
After rolling, the electrode roll needs to be cut according to battery design requirements. The cutting must ensure the accuracy of the electrode sheet size. The sheet may also need trimming to remove excess edges or irregular parts. 

9. Inspection and Quality Control:
The completed rolled electrode sheets are inspected for quality, including:

Thickness: Use precision measuring tools to ensure the thickness meets requirements.

Electrode Density: Check if the compression is up to standard to ensure battery performance.

Surface Uniformity: Inspect the surface for smoothness, cracks, and bubbles.

Dimensional Accuracy: Ensure the cut electrode sheet sizes are precise.