Semi-Automatic Precision Winding Machine for Prismatic Battery Cells

1. Equipment Description:

This machine is mainly used for precision winding of cylindrical lithium-ion battery cells.

Working process: Manually feed cathode and anode sheets into the winding section, interleave them with the separator, wind according to process requirements, automatically attach termination tape, and automatically discharge the finished cell.

2. Equipment Functions and Features

1. Single-needle through-shaft winding structure.

2. Manual feeding of electrodes, automatic winding, needle changing, tape attachment, and discharging.

3. Lateral taping method (termination tape perpendicular to tab); flat and accurate tape application without pulling the cell tight; reliable and stable taping.

4. Adjustable winding speed.

5. Two active separator rolls, tension controlled by proximity switch; smooth auto-adjustment during winding; adjustable upper and lower tension.

6. Separator wraps on the outside at the end.

7. Wound cells have no damage, core extraction, or misalignment.

8. Easy operation and quick specification change.

3. Process Flow

This equipment complies with the winding standards for cylindrical lithium-ion batteries, which require that the separator fully encloses the anode, and the anode wraps around the cathode.

Workflow steps:
1. Pre-winding of the separator: A toothed blade is used to shorten the length of the separator.
2. Anode feeding: Manually load the anode into the winding unit.
3. Cathode feeding: Manually load the cathode into the winding unit.
4. Execute winding.
5. Transfer to the taping position.
6. Cut the separator, apply tape, and discharge the finished product.

4. Equipment Composition

1. Includes winding device, position shifting unit, separator unwinding unit, electrode guide unit, taping unit, discharging unit, and control system.

2. Winding device (2 sets): single-head through-shaft ensures accuracy; easy needle replacement.

3. Position shifting unit (1 set): for switching between winding and taping positions.

4. Separator unwinding unit (2 sets): active unwinding, pneumatic tension control.

5. Electrode guide unit (2 sets): adjustable single-side alignment.

6. Taping and discharging unit (1 set).

5. Technical Specifications

l Separator width: 6–45 mm

l Winding needle size: ∮1.5–∮6.0 mm (customized)

l Electrode width: 4–43 mm

Material Specifications (mm):

l Capacity: 5–12 pcs/min (depending on electrode size)

l Winding accuracy:

¢ Electrode width deviation < ±0.2 mm

¢ “S” curve deviation < ±1 mm/500 mm

¢ Separator roll tower deviation < ±0.2 mm

¢ Final alignment: separator and electrode < ±0.5 mm

¢ Anode wraps cathode, separator wraps anode, end face alignment < ±0.5 mm

l Pass rate: ≥98% (excluding non-equipment factors)

6. Technical Standards