Motor Applications in Lithium Battery Electrode Slitting Machine

1. Component Overview

The lithium battery electrode slitting machine is a critical device in the battery manufacturing process, mainly used to cut wide electrode sheets to the required width, ensuring precise and consistent electrode sheet dimensions. The main components include:

• Unwinding System: Equipped with an unwinding rack, tension adjustment device, tension sensors, and servo drive motors, ensuring smooth and orderly material release with precise tension control to prevent slack or breakage of the material.
• Slitting Knife Rack: Uses rotating circular knives or linear cutters, equipped with high-response servo motors, supporting multi-axis operation for high-speed, precise slitting with smooth, burr-free cuts.
• Guidance and Tension Adjustment System: Through guiding rollers and servo tension motors, dynamically adjusts material tension and direction, ensuring stability and accurate positioning of the electrode sheets during the cutting process to avoid deviation and wrinkles.
• Winding System: Equipped with high-torque servo motors and tension feedback systems, automatically adjusting the winding speed and tension to achieve neat winding of the electrode sheets, adapting to changes in roll diameter.
• Control System: Includes PLC and motion controllers for synchronizing multi-axis servo motors and closed-loop tension adjustment, realizing intelligent and efficient operation of the slitting machine.

2. Working Principle

Electrode sheets enter the slitting machine from the unwinding rack. The tension control system continuously monitors the material tension and adjusts it through the unwinding and winding motors according to feedback, ensuring smooth material transportation. The slitting knife rack cuts the electrode sheets precisely according to the preset width parameters, while multi-axis servo motors coordinate the cutting and feeding actions. The winding motor adjusts the speed and tension automatically based on changes in roll diameter, preventing material wrinkles, deviation, or uneven tension, ensuring uniform width and smooth edges of the slitted electrode sheets. The entire process depends on the coordination of multiple motors and high-precision tension control to ensure high production efficiency and product quality.

3. Motor Roles in the System

Motors serve as the core power source for the slitting machine, performing several critical tasks:

• Precise Tension Control: Unwinding and winding motors continuously adjust the output torque, working with tension sensors to maintain constant material tension and prevent slack or breakage during high-speed operation.
• High-Precision Cutting Drive: The servo motor in the slitting knife rack supports high-speed, high-precision positioning and cutting, ensuring accurate tool angles and positions, with smooth, burr-free cuts that meet the high precision requirements for lithium battery electrode processing.
• Multi-Axis Synchronization: Multiple motors coordinate in real-time through a closed-loop control system to ensure that the feeding, cutting, and winding processes are synchronized, preventing material deviation and dimensional errors.
• Environmental Adaptability: Motors are designed to withstand the high-dust, high-temperature, and organic solvent-rich environment of lithium battery production workshops, with IP65 or higher protection, high-temperature resistant windings, and sealed structures to ensure long-term stable operation.
• Low Vibration, Low Noise: The use of high-performance planetary reducers and precision encoders reduces mechanical vibration, preventing damage to the electrode sheets and improving product quality.

4. Custom Motor Solutions

For the high-precision, high-efficiency, and stable operation demands of the electrode slitting machine, we recommend a complete set of integrated motor solutions. The unwinding and winding sections use the GPG-TM series constant tension servo motors, paired with high-precision tension sensors and intelligent PID control algorithms to automatically detect roll diameter and adjust torque dynamically, ensuring constant material tension and neat winding. The slitting knife rack utilizes GPG-SV series high-response servo motors, paired with precision low-backlash reducers, supporting high-speed rotation and micron-level positioning control, ensuring precise cutting without damage. The guidance and tension adjustment system is equipped with small high-precision servo motors for dynamic adjustment of electrode sheet guidance and tension compensation. All motors support industrial communication protocols such as EtherCAT and CANopen, facilitating easy integration with the upper-level system for intelligent monitoring and fault diagnosis. Motor designs emphasize corrosion resistance, dustproofing, and splash-proofing, with high-temperature enamel wires and sealed enclosures to ensure long-term stable operation in harsh environments. With this solution, the electrode slitting machine achieves high-speed, high-precision, automated slitting, significantly improving production efficiency and product consistency while reducing maintenance costs.