Motor Applications in Lithium Battery Winding Machines

1. Component Overview

The lithium battery winding machine is a critical device in battery manufacturing, directly affecting the compactness and uniformity of the internal structure of the battery. The machine has a compact design and high automation, and mainly includes the following core components:

Winding System: Includes winding spools, pressure rollers, guiding devices, and tension control units, responsible for tightly winding the anode sheets, separators, and cathode sheets into cylindrical battery cells.

Feeding System: Responsible for feeding the anode and separator materials with precise tension and position sensors for high-precision feeding.

Tension Control System: Maintains constant material tension through tension sensors and feedback controllers, preventing the winding from becoming loose or overly tight.

Control System: Uses PLC or motion controllers for multi-axis synchronous control, coordinating feeding, winding, and tension adjustment actions.

Wound Core Ejection and Transfer Mechanism: Safely moves the completed wound cell from the winding area and transfers it to the next process.

2. Working Principle

The winding machine works by precisely controlling the speed of the winding shaft and the feeding speed to achieve synchronized winding of the anode sheets and separators. The motor drives the winding shaft while the feeding motor ensures the uniform feeding of the materials, and the tension motor adjusts the feeding tension. The winding process requires real-time monitoring of the core diameter and tension status. The control system adjusts the speed and torque of the driving motors based on feedback signals to ensure that the number of windings and the density are uniform, preventing material misalignment or damage.

3. Motor Roles

Motors play a crucial role as the driving core, responsible for power output and precise position control to ensure efficient and stable operation of the winding machine:

Winding Drive: The main drive motor must provide high torque to smoothly drive the winding shaft for high-speed, continuous winding, ensuring the core is compact and free of gaps.

Feeding Control: The feeding motor provides accurate linear velocity, achieving stable feeding of the anode sheets and separators, preventing tension fluctuations that could affect winding quality.

Tension Adjustment: A dedicated tension motor works with tension sensors to dynamically compensate for material elongation or slack, ensuring constant tension in all materials and preventing loosening or rupture of the wound core structure.

Multi-Axis Synchronization: Multiple motors work together through a closed-loop control system to ensure highly synchronized feeding, winding, and tension adjustment, reducing error accumulation and improving product consistency.

Adapting to Complex Environments: Motors must have good heat dissipation and sealing performance to adapt to the dusty, solvent-rich environment and long-term high-load operation in lithium battery production workshops.

4. Custom Motor Solutions

For the high-precision, high-load, and long-duration operation demands of the winding machine, we provide a complete solution including the main drive servo motors, feeding stepper motors, and intelligent tension motors. We recommend the GPG-SV150 series high-torque servo motors, which support high-speed stable output with a peak torque of up to 30Nm. They are paired with high-precision planetary reducers to achieve smooth startup and positioning control for the winding shaft. The feeding system is well-suited for the GPG-ST60 series stepper motors, which offer excellent positioning accuracy and rapid response, supporting multiple communication protocols for easy system integration. For tension regulation, the GPG-TM90 series constant tension motors with built-in torque sensors and intelligent control algorithms achieve real-time tension compensation, ensuring precise and stable material tension. All motors are designed with IP65 protection and use high-temperature-resistant windings to ensure stable long-term operation in high-temperature, dusty, and solvent-rich environments. Our custom solutions also support seamless integration with mainstream control systems, facilitating automation and intelligent upgrades for device manufacturers and significantly improving the production efficiency and cell quality of winding machines.