Heating rollers in calendering and laminating processes

Heating rollers in calendering and laminating processes

In battery manufacturing, thermal process control plays a crucial role in product quality, energy efficiency, and reproducibility. Especially during the calendering and lamination of coated anode and cathode material, aluminium and copper foils, and separator foils, an exact, uniform temperature distribution across the entire roller width is essential.
The smallest thermal fluctuations can cause inhomogeneous material properties, delamination, bubble formation, or adhesion issues.
With INOheat^®, INOMETA offers electrically heated roller systems that generate process heat directly within the roller body. Eliminating liquid heating media, external storage tanks, and piping not only reduces space requirements but also lowers energy consumption and simplifies plant peripherals. The result is fast response times, homogeneous heat input, and maximum integration into modern production processes.

Get in touch with the INOMETA sales team today for comprehensive advice on rollers for battery production and other innovative products from the renowned manufacturer based in Germany. Make your inquiry now.

Thermal performance and system integration of INOheat^® heating rollers

The heat generated locally in the roller body acts precisely where it is needed – on the substrate surface. Depending on the design, INOheat^® rollers can reach temperatures of up to 220°C with a uniform surface temperature distribution and tolerances of less than ±1°C. The precise positioning of the heating elements allows for targeted control of the temperature profile, which is especially important for temperature-sensitive or multi-layer coating systems used in solid-state or thin-film cell production.
Especially when processing sensitive material systems such as metallic foils (e.g., aluminium, copper foils) and porous separator foils, precise temperature control is a key quality factor.
For process-critical applications, you can choose from options like temperature-resistant hard metal surface coatings, non-stick coatings, or elastic covers in various degrees of hardness.
Thermal decoupling is also a key part of the design. The roller’s targeted construction minimizes unwanted heat transfer to adjacent components – an added benefit for process stability and machine protection.

Technical specifications at a glance:

• Max. surface temperature: up to 220°C
• Operating temperature of slip ring: 85°C – 200°C
• Typical working widths (WOB): up to 1,500 mm
• Inner diameter: ≥ 180 mm
• Wall thickness: ≥ 15 mm for WOB < 1,000 mm / ≥ 20 mm for WOB > 1,000 mm
• Max. speed: 400–800 rpm (depending on model)
• Maintenance-free sliding contact: up to 500 million revolutions
• Integration: Fieldbus-compatible (e.g., Profinet, EtherCAT)
• Optional: INOid^® (digital asset management) & INOlogic^® (condition monitoring)

All advantages of INOheat^® heating rollers by INOMETA at a glance

• Very good energy and overall efficiency (no heat loss from storage tanks, pipes, or pumps).
• Shorter heating and start-up times (no time-consuming heating of a medium).
• High cost-effectiveness due to excellent energy efficiency and durability.
• Very low space requirements and investment costs (no storage tanks, pipes, or pumps needed).
• Easy to install thanks to the low space requirements.
• Excellent integration options into the machine control system via fieldbus, allowing for the documentation and control of process variables.
• Local generation of process heat exactly where it is needed.
• Extremely low service costs and shorter service downtimes, as there is no need for maintenance of rotary unions, pipes, storage tanks, and pumps.
• No leaks that could contaminate the environment or the substrate.
• Environmentally friendly recycling due to the absence of oil-based heating media.
• Ecological because there is no waste oil pollution.
• Optional: INOid^® (digital asset management) & INOlogic^® (condition monitoring)

Thermomechanical interaction between heating roller and calender roller

In calendering processes, temperature directly influences material density, which in turn determines the energy density and service life of the cells. The precise interaction between the heated roller and the calender roller is crucial here – while the calender roller applies mechanical pressure, the heating roller ensures a precisely tempered surface that enables uniform plastic deformation of the material – without thermal overload or structural changes.
Especially during the calendering of aluminium and copper foils as well as double-sided coated anode or cathode materials, a uniform layer thickness and a reproducible material densification can only be achieved through this finely balanced interplay.
In the lamination process, the controlled balance of pressure, temperature, and time determines the adhesion of the layers and the occurrence of defects such as bubbles or delamination. Only when both types of rollers are optimally coordinated can reproducible results and the highest product quality be guaranteed.

Precise temperature control for delamination-free layer bonds

In calendering processes, temperature directly influences material density, which in turn determines the energy density and lifespan of the cells. The precise interplay between the heated roller and the calender roller is crucial here: while the calender roller applies the mechanical pressure, the heating roller ensures a precisely tempered surface that allows for uniform plastic deformation of the material—without thermal overload or structural changes.
Especially during the calendering of aluminium and copper foils as well as double-sided coated anode or cathode materials, a uniform layer thickness and a reproducible material densification can only be achieved through this finely balanced interplay.
In the lamination process, the controlled balance of pressure, temperature, and time determines the adhesion of the layers as well as the occurrence of defects such as bubbles or delamination. Only when both types of rollers are optimally matched can reproducible results and the highest product quality be ensured.

Expertise in advanced roller systems for battery manufacturing

In the lamination process of battery manufacturing, precise control of process parameters –especially temperature, pressure, and time – is important for the quality of the layer bond. Electrically heated rollers such as INOheat^® enable homogeneous and precisely controllable temperature distribution across the entire roller width, minimizing thermal gradients. Synchronized interaction with the laminating roller, which applies the necessary mechanical contact pressure, ensures uniform energy input into the substrate. Only through this targeted thermomechanical coupling can delamination-free layer structures, minimal air pockets, and reproducible lamination quality be achieved – even with sensitive layer systems such as those used in solid-state or thin-film cell production. Precise control of these parameters contributes significantly to the long-term stability and functional reliability of the battery cell.

From process rollers to digital integration – everything from a single source

INOMETA is your partner for customized roller and winding solutions in battery production – from thermally high-precision heating rollers to functional surfaces for demanding substrates.
In addition, we support you in the digital advancement of your production lines. With system solutions such as INOid^® for unique component identification and INOlogic^® for connection to digital infrastructures, we create the basis for networked, automated production environments.

Get in touch with our sales team today to learn more about INOMETA’s roller solutions. Contact us directly now or fill out our inquiry form to send us your information.