E-mail: cysi@cysi.wang
The intermittent lithium battery coater is a three-roll transfer coating equipment, which is convenient for use in the surface coating process of various substrates
The intermittent lithium battery coater is a three-roll transfer coating equipment, which is convenient for use in the surface coating process of various substrates. Especially used in the lithium-ion battery industry, the device is designed to facilitate the use of researchers, while meeting the requirements of coating accuracy and consistency equal to production, excellent drying effect, is the ideal choice for lithium-ion batteries, ultracapacitors, nickel batteries and other secondary battery research and development.
1.Substrate tension control, strip stability, deviation correction device;
2.Hot air oven, upper and lower double-sided blowing, high quality drying effect;
3.Three-roll transfer coating, with a wide coating window;
4.Comma scraper metering, with precision adjustment mechanism, to obtain high coating accuracy;
5.PLC control, touch screen operation, easy to use;
6.Optional solvent recovery treatment device;
If you are interested in our Intermittent Faster Roll to Roll Coating System, please contact us for more information and quotes.
Contact number: 156 3719 8390
Email: shirley@cysitech.com
Contact person: shirley
WeChat: 18736046549
Name | Intermittent Faster Roll to Roll Coating System |
Model | CY-SY400 |
Suitable system | Lithium iron phosphate, lithium cobalt, lithium manganate, graphite, silicon carbon and other system battery positive, negative plate coating process |
Coating method | Continuous coating, intermittent coating transfer coater |
Number of oven sections | 3 sections 1.5m oven |
Mechanical speed | Not less than 4.5m/min |
Run substrate thickness | Aluminum foil (Al) : 8 ~ 30um Copper foil (Cu) :8~30um |
Roll face design width | 400 mm |
Guarantee the width of the coating | No less than 280mm |
Coating roller, backing roller | Diameter 120mm |
Scraper roller | 80mm diameter |
Coating accuracy | Better than ±3um (margin error ±5um) |
Double sided coating weight accuracy(mg/cm2) | Coating center value ±1.0% |
Suitable for paste viscosity | 2000~12000 (mPas) |
Apply dry thickness fan on one side wai | 30 to 200μm |
Thickness adjustment | Free adjustment, the dial indicator shows accuracy of 1um |
Coating length | Clearance: single piece Max.10000mm, white 8 ~ 120mm, fine Degree ±0.5mm |
Rectifying accuracy of winding | + / - 0.5 mm |
Solvent characteristics | Oil-based solvent NMP(s.g=1.033,b.p=204℃) |
Suitable for solid content range | 20 ~ 85% |
Coating size accuracy (mm) | L≤±1, W≤±0.5 |
Alignment accuracy of front and back (mm) | L≤±1, W≤±0.5 |
Name | Description |
Main machine | Intermittent Faster Roll to Roll Coating System |
Vacuum pump | 1.Substrate Fixation: In some coating machines (such as roll coaters, spray coaters, spin coaters, etc.), vacuum adsorption helps fix the substrate (e.g., film or paper) onto the worktable, preventing the substrate from moving or deforming during the coating process. Vacuum adsorption ensures that the substrate remains securely in place within the coating machine’s work area, ensuring the precision and consistency of the coating process. 2.Preventing Substrate Warping or Floating: For flexible materials, vacuum adsorption can prevent the material from warping or floating due to air currents or other forces during the coating process. This is especially important for materials like films and papers, helping to ensure that the coating is applied evenly and smoothly. 3.Improving Coating Precision: By ensuring that the substrate remains fixed in place during the coating process, vacuum adsorption improves the coating precision, reducing substrate displacement or tilting. This helps ensure the uniformity and quality of the coating. 4.Stability During the Coating Process: Vacuum adsorption helps maintain stable contact between the substrate and the coating head or nozzle throughout the entire coating process, reducing issues caused by substrate movement, such as uneven coatings or incomplete coating application. |
Tension control | 1. Maintain uniformity of the film layer During the coating process, the tension of the substrate needs to remain stable. If the tension is uneven, the coated film layer may have uneven thickness, ripples or stretching problems, affecting the quality of the final product. The tension control system ensures the uniformity and accuracy of the film layer by adjusting the tension in real time to ensure that the substrate runs smoothly during the coating process. 2. Prevent material deformation or damage Excessive tension may cause the substrate or coating layer to overstretch, causing the material to crack, wrinkle or break; too little tension may cause the material to relax, fail to coat effectively, or wrinkle. Precise tension control helps to maintain appropriate tension at different stages of the process (such as coating, drying, cooling, winding, etc.), thereby avoiding these problems. 3. Control the feeding and winding process of the coil The roll-to-roll coater adjusts the tension of the substrate during the feeding and winding process through the tension control system to ensure that the substrate can pass through each process evenly and be accurately wound into a roll at the end. 4. Improve coating quality During the coating process, the tension on the surface of the material affects the coating effect of the slurry. Stable tension helps ensure uniform contact between coating equipment (such as scrapers, rollers, etc.) and the substrate, thereby improving the quality of coating. |
Oven | 1. Solvent evaporation and drying 2. Improve coating uniformity 3. Improve coating density and adhesion 4. Avoid coating defects 5. Optimize temperature control and drying rate |
Random accessory | Related auxiliary tools, such as scraper film maker, etc. |
User manual | One piece |
1. Electronic product manufacturing
Battery electrode coating: In electronic products such as lithium batteries and supercapacitors, intermittent coaters are often used to coat battery positive and negative electrode materials, conductive layers, isolation films, etc. By precisely controlling the coating amount, the uniformity and stability of the coating are ensured, thereby improving the performance and safety of the battery.
Flexible electronic devices: In fields such as flexible displays, sensors, and wearable devices, intermittent coaters can coat functional films such as conductive films and photoelectric films.
Printed circuit board (PCB) coating: Used to coat conductive inks, protective coatings, welding solder resists, etc. to improve the reliability and durability of circuit boards.
2. Photovoltaic and solar energy industry
Photovoltaic cell coating: In the production of thin-film solar cells, intermittent coaters are used to coat functional layers (such as electrodes, transparent conductive films, anti-reflective layers, etc.). The coating of these layers requires high-precision control to ensure efficient energy conversion.
Organic photovoltaics (OPV): For the coating of organic photovoltaic cells, intermittent coaters help ensure the uniformity and thickness consistency of the coating, thereby improving the photoelectric conversion efficiency of the cell.
3. Thin film technology
Optical thin film: used in the production process of optical thin films such as reflective film, anti-reflective film, and light-transmitting film. The intermittent coater can accurately control the thickness of the coating layer to ensure optical performance.
Transparent conductive film (TCF): When manufacturing products such as touch screens, liquid crystal displays (LCDs), and OLED displays, coating transparent conductive film is a key step. The intermittent coater helps to ensure the uniformity and conductivity of the film layer.
4. Packaging materials
Film packaging: used to apply functional coatings (such as moisture-proof, anti-oxidation, and anti-ultraviolet coatings) on packaging materials such as food and medicine. Through precise coating, the intermittent coater can improve the protective effect and service life of the packaging material.
Drug packaging: such as sustained-release coatings, protective films, etc., the intermittent coater can ensure that these functional coatings are uniform and precise.
5. Medicine and medical treatment
Drug coating: Intermittent coaters are widely used in drug coating, especially for the coating of sustained-release drugs, sugar coatings, oral tablets, etc., to ensure drug release control and improve drug stability.
Medical device coating: used for coating medical sensors, electrodes, catheters and other medical devices to ensure uniformity, durability and biocompatibility of the coating.
6. Automotive industry
Automotive coating: In the process of automobile manufacturing, intermittent coaters are used to apply anti-corrosion coatings, protective films, primers, etc. Intermittent coating helps maintain the consistency and quality of coatings on complex curved surfaces or in small batches.
Interior coating: used for coating automotive interior parts (such as seats and dashboards) to improve surface wear resistance, UV resistance and aesthetics.
7. Paper and tape manufacturing
Paper coating: In the process of paper production, intermittent coaters are used to apply coatings, inks, gloss layers, etc. to improve the surface quality, printing performance and waterproofness of paper.
Tape coating: used to manufacture various industrial tapes, double-sided tapes, etc., to accurately control the amount and uniformity of glue coating.
8. Cosmetics and coatings
Cosmetic coating: For example, in the manufacture of cosmetics such as lipstick, eye shadow, and nail polish, intermittent coaters can be used to accurately control the coating thickness to ensure the coating quality of each layer.
Coating: used for the production of precision coatings, such as high-gloss coatings, industrial coatings, etc. By controlling the coating thickness and uniformity, the effect and durability of the coating are improved.
9. Functional coatings
Waterproof and fireproof coatings: used on the surfaces of building materials, textiles, etc., to apply waterproof and fireproof coatings to ensure that the products are weather-resistant and safe.
Antibacterial coatings: antibacterial layers are applied in textiles, medical equipment, food packaging and other fields to improve the antibacterial properties of products.
10. Printing and textiles
Printing ink coating: In the printing industry, intermittent coating machines are used to accurately apply printing inks to ensure the clarity, color saturation and quality of printing.
Textile coating: In textile production, functional coatings such as waterproof, anti-fouling, and anti-ultraviolet are applied to improve the performance of textiles.
Application Case (Preparation of lithium cobalt oxide)
In the preparation process of lithium cobalt oxide (LiCoO₂) electrode materials, intermittent coaters are usually used to coat electrode material slurry. Lithium cobalt oxide is one of the commonly used positive electrode materials for lithium-ion batteries, and its performance is closely related to the uniformity and precision of the coating process. The use of intermittent coaters can ensure the consistent quality of the coating layer, especially in lithium cobalt oxide coating applications, it helps control the thickness and uniformity of the coating, which ultimately affects the performance and life of the battery.
The following are the steps to prepare lithium cobalt oxide electrodes by intermittent coaters:
1. Prepare lithium cobalt oxide electrode slurry
Raw material preparation:
Lithium cobalt oxide (LiCoO₂) powder: as the main active material.
Conductive agent: such as carbon black or conductive carbon, used to improve the conductivity of the electrode.
Binder: such as polyvinylidene fluoride (PVDF), etc., to help the electrode material particles bond together.
Solvent: N-methylpyrrolidone (NMP) or other solvents are usually used to dissolve the binder and adjust the viscosity of the slurry.
Slurry preparation:
Mix lithium cobalt oxide powder, conductive agent, binder and solvent in a certain proportion, use a mixer or grinding equipment to fully stir to form a uniform slurry.
Adjust the viscosity of the slurry to meet the coating requirements of the intermittent coater. Too high viscosity may lead to uneven coating, while too low viscosity may lead to too thin coating.
2. Coating preparation
Substrate preparation: The substrate is usually aluminum foil (for the positive electrode), which needs to be cleaned and treated to ensure that its surface is smooth and free of pollution to enhance the adhesion of the lithium cobalt oxide coating.
Cleaning: Use solvent or deionized water to clean the substrate to remove impurities such as oil and dust on the surface.
Surface treatment: Sometimes the surface is roughened to improve the adhesion of the coating.
3. Intermittent coater coating operation
Coating liquid preparation: Add the prepared lithium cobalt oxide slurry to the coating tank of the intermittent coater.
Choose the appropriate wire rod/coating head: Choose the appropriate wire rod or coating head according to the viscosity of the slurry and the required coating thickness. The groove depth and shape of the wire rod will affect the thickness of the coating.
Set coating parameters: Set the coating interval, coating speed and coating thickness of the coating machine to ensure that the coating is uniform and meets the requirements.
Interval time: The coating machine pauses periodically according to the set interval time to ensure that each coating can be evenly coated on the substrate.
Coating thickness control: The coating thickness is controlled by adjusting the viscosity of the coating liquid, the coating speed and the distance between the wire rod and the substrate.
4. Drying process
Solvent evaporation: The electrode sheet needs to be dried after coating to remove excess solvent. Common drying methods include using a hot air oven or vacuum drying.
Temperature control: Usually controlled between 60℃ and 150℃, the specific temperature depends on the type of solvent and binder used.
Time control: Determine the appropriate drying time based on the coating thickness and the type of slurry. During the drying process, the solvent will evaporate, leaving a uniform electrode material.
5. Compacting and surface leveling
Roller pressing: In order to make the coating layer more compact and increase the energy density and performance of the electrode, a roller press is usually used to compact the coated lithium cobalt oxide electrode. Rolling can further reduce the porosity in the coating and improve the density and conductivity of the electrode.
Surface flatness: Rolling can also ensure the flatness of the coating surface and improve the appearance quality of the electrode.
6. Further curing and heat treatment
Curing process: Depending on the type of binder used, further heat treatment or curing process may be required to ensure that the binder is fully cured and enhance the mechanical strength of the coating.
The temperature and time should be adjusted according to the specific binder requirements. The general curing temperature is between 150℃ and 200℃, and the curing time is usually about 1 hour.
7. Quality inspection and finishing
Thickness measurement: Use a coating thickness measuring instrument to detect the uniformity of the coating to ensure that the coating thickness meets the requirements.
Adhesion test: Perform a coating adhesion test to ensure that the coating is firmly attached to the substrate surface.
Appearance inspection: Check whether the coating has defects such as bubbles, cracks, scratches, etc.
8. Cutting and packaging
Cutting: Cut the coated electrode material into appropriate sizes as needed, usually in the form of sheets or rolls required for the battery.
Packaging: The final electrode material can be packaged as required, usually in an anti-static, sealed environment to ensure product stability and safety.
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