Vacuum Drying

Vacuum Roll to Roll Drying System

Suitable for drying cathode/anode elecrodes

The roll-to-roll drying method is widely used in the production of various flexible electronics, including batteries and printed electronics. It offers several advantages, particularly when manufacturing large quantities of thin and flexible electrode materials.

It is also vital part of the modern production process for flexible electronics and energy storage devices. It enables the efficient and continuous manufacturing of thin, flexible, and high-quality electrode materials that are essential for products like flexible batteries, supercapacitors, and wearable electronics. Its ability to meet the demands of large-scale production while maintaining precision and quality control makes it a valuable technique in the manufacturing industry.

  1. Features for Vacuum Roll to Roll (RtoR) drying system

    - Uniform Heating
    RtoR drying is a continuous process where the electrode material is coated onto a flexible substrate in a continuous web format. Compared to conventional roll drying, RtoR processing provides uniform product quality.

    - Reduced Drying Time
    RtoR drying is designed for high-throughput production, making it suitable for large-scale manufacturing. It allows for the efficient processing of electrode materials in large volumes. Compared to conventional roll drying, RtoR processing significantly reduces processing time. (12hr→0.6hr)

    1. - Cost Efficiency
    2. RtoR processes are cost-efficient for large-scale production due to minimal downtime and reduced manual intervention. They are highly automated, streamlining production.
  2. - Space Saving
    The vertical arrangement of the heaters reduce the installation space to 1/10 compared to the horizontal arrangement.

  3. - Lead time reduction
    By adopting a gate valve mechanism, the lead time for product replacement is greatly reduced.

Vacuum Roll to Roll heating system compared with conventional roll drying.

Continuous vacuum heating system: Requires a lot of factory space compared with RtoR system.
  1. Differences between batch vacuum heating systems

- Heat treatment
The biggest difference between the batch type roll drying process and our RtoR drying system is how we can treat uniform heating to the electrodes.
Companies that manufacture electrodes where they have drying process in the production line, they usually face a problem called "Springback Effect".
This is caused when there are temperature differences between the inner part and the outer part of the electrode roll, which then causes the cathode/anode materials to "Spring back" even though they are pressed in the previous processes.

- Energy Saving
Since the conventional vacuum heating systems uses nitrogen (N2) to make a "vacuum" atmosphere, the operational cost is significantly high. Also, the structure of the RtoR drying system has a significantly smaller chamber than the conventional systems, power consumption is also dramatically lower.
It is estimated have approx. 50% lower power consumption and 100% less nitrogen (not necessary) compared to convetional systems which also has a large impact to CO2 emission!


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