JUNCAUTO Solution | Lithium Battery Electrode Sheet Machine
Release Time：
2026-07-14 09:25
A lithium battery electrode sheet machine is used to weld tabs onto electrode sheets and process continuous rolls of electrode material, tabs, and adhesive tape. The machine performs tab welding, tape wrapping, tape laminating, and finally rewinding or sheet cutting, ensuring high-speed and consistent production.
View of A Lithium Battery Electrode Sheet Machine
Process Flow
Unwinding & Rewinding Control
Stable and high-speed unwinding/rewinding is the foundation of reliable machine operation. As the roll diameter changes continuously during production, the peripheral speed must be adjusted in real time to maintain synchronization.
JUNCAUTO's solution combines the FOLLOW instruction with PD compensation to achieve precise synchronization throughout the winding process.
PD Compensation
The dancer roller position is used as the feedback signal for speed compensation.
When the dancer rises, the unwinding speed is increased.
When the dancer drops, the unwinding speed is reduced.
Since the unwinding/rewinding system features fast dynamic response with virtually no steady-state error, only the Proportional (P) and Derivative (D) terms are required.
FOLLOW Control
The FOLLOW instruction maintains synchronization by continuously updating the speed ratio based on the changing roll diameter.
- The numerator is fixed as the traction roller circumference.
- The denominator is the current winding/unwinding roller circumference.
- The roller circumference is recalculated every 10° of rotation.
The calculation is based on the following parameters:
- Pulses per revolution
- Pulse count for every 10° of rotation
- Material travel over 10° = Traction roller travel + Dancer roller displacement
- Roller circumference = (Pulses per revolution ÷ Pulses over 10°) × Material travel over 10°
Detailed steps ↓ ↓ ↓
Comparison of unwinding and rewinding rollers ↓ ↓ ↓
Web Guiding Control
The web guiding system uses analog position feedback to continuously detect the electrode position and keep the material accurately aligned. Unlike conventional dual-channel I/O-based guiding systems, JUNCAUTO applies PD control, providing:
Faster response
Smoother correction
Higher positioning accuracy
Demo ↓ ↓ ↓
Tape Laminating
The tape laminating process is implemented using the CAM instruction (K2 Function Code) for flying shear operation.
The upper and lower tape laminating axes synchronize with the traction axis. A servo probe detects the electrode tab position and stores the position data in the PLC. Once the material reaches the synchronization zone, tape laminating is performed without stopping the production line. Compared with traditional stop-and-laminate methods, the flying shear solution significantly improves production efficiency while maintaining positioning accuracy.
Control Solution
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