The TG20-L Series Laser Electrode Thickness Gauge is specifically designed for the measurement and control of the total thickness of lithium battery electrode sheets during the calendaring process. The system consists of a host control unit, a laser thickness measurement unit, and a detector positioning mechanism.
It provides accurate and reliable measurement of total surface weight and thickness, including both the electrode substrate and its active coating.
The thickness control system can be integrated into a closed-loop configuration with calendaring equipment, ensuring precise thickness regulation of the electrodes. This enables high-quality manufacturing of lithium battery electrodes in line with industry standards.
Advantages of the Laser Thickness Gauge
· Non-contact measurement ensures superior accuracy compared to contact-based thickness gauges.
· No degradation in precision due to mechanical wear.
· High measurement resolution, unaffected by the material, texture, shape, or reflectivity of the object being measured.
Applicable Processes:
· Continuous coated cold rolling
· Intermittent (gap) coated cold rolling
· Stripe coated cold rolling
Suitable Materials:
· Cathode sheets
· Anode sheets
· Copper foil
· Aluminum foil
Technical Specifications
Measurement Principle
The laser thickness gauge is based on the triangulation measurement principle, using an integrated triangulation displacement sensor to detect the distance from the mounting frame to the object’s surface. By subtracting this value from the fixed frame distance, the system calculates the material’s thickness.
When thickness changes occur, the laser beam emitted by the transmitter reflects off the object’s surface and is received at a shifted position on the laser receiver. The change in beam position is used to geometrically calculate the variation in thickness. The result is output as digital data or graphical trend curves.
During operation, two laser displacement sensors (mounted above and below) perform opposing measurements of the object’s top and bottom surfaces. The system then calculates thickness using the formula:
h = L – A – B,
where:
· L = distance between sensors
· A = upper sensor distance to top surface
· B = lower sensor distance to bottom surface
Industry-Specific Software Features
· Intelligent, user-friendly operation
· Real-time display of thickness data
· Advanced visualization tools: real-time thickness map, overlapping curve plots, regional thickness trends, 3D longitudinal/transverse trend diagrams
· Professional database-driven data recording and management
· Full traceability with long-term data storage (up to 3 years)
· Recipe-based parameter templates for various process requirements
· Fixed-point measurement capability
· Automatic sensor activation and scanning control
Communication and Bus Interfaces
· Supports seamless integration with MES systems
· Allows host system to communicate with LAN via bus connections
· Compatible with PLC, Ethernet, RS485, RS232, and other industrial protocols
Automatic Thickness Control for Calendered Electrodes
· The system sends real-time thickness data to the calender, which automatically adjusts the pressure accordingly
· Control accuracy: ±0.2% FS, equal to or better than scanning resolution
