Battery films are compacted and smoothed in coating lines using calendering technology. Two adjustable rolls ensure that the material mixture is rolled to the specified thickness. The capaNCDT CSG capacitive flat sensors are used for gap monitoring and control of the calender and coating rollers. These are available in various designs and detect the roller gap with micrometer accuracy. These compact sensors can be integrated into confined installation spaces to measure directly against the roll or the roll suspension.

The gap is measured directly by integration on the roll with a flat sensor just 0.9 mm thick. The capacitive sensor measures on both sides and thus detects two distances to the upper and lower roll. The roll gap is controlled during operation based on the measured values. In addition, the temperature-stable design allows use even at high ambient temperatures. To protect the sensor from dust deposits, an air purge device is integrated.

Advantages:

• Precise roll gap measurement with high accuracy
• Flat and compact sensors for integration in confined installation spaces
• Air purge device enables low-maintenance operation