Semi Automatic Cylindrical Lithium Ion Battery Winding Machine

Product Overview

This semi-automatic winding machine is a precision core assembly system engineered specifically for manufacturing cylindrical lithium-ion battery cells. Designed to bridge the gap between benchtop R&D and high-throughput industrial production, this equipment accurately stacks and winds cathode and anode electrode sheets with dual separator films. The unit automates the entire critical winding sequence—including high-accuracy winding needle rotation, workstation indexing, precision separator cut-off, automated termination taping, and cell unloading—following manual electrode strip feeding.

Built for high-mix research institutes, pilot lines, and specialized battery fabrication facilities, the system supports a wide range of cylindrical cell form factors ranging from 10 mm to 25 mm in outer diameter. It accommodates standard and custom cylindrical sizes such as 18650, 21700, and 26650 by utilizing customizable winding pin tooling. The system delivers unmatched versatility across various battery chemistries, including lithium iron phosphate (LFP), nickel manganese cobalt (NMC), lithium cobalt oxide (LCO), and next-generation solid-state or sodium-ion formulations.

Engineered with industrial-grade mechanical stiffness and intelligent servo-driven motion, this equipment ensures repeatable winding tension and alignment under continuous multi-shift operation. Integrated optical and proximity sensors work seamlessly with high-precision stepping and servo motors to prevent core loosening, core pulling, electrode dislocation, or separator deformation. The resulting jelly rolls exhibit superior structural integrity, strict dimensional tolerances, and defect-free finishes necessary for premium electrochemical performance.

Key Features

• Single-Needle Penetration Tooling: Utilizes a rigid single-pin counter-insert winding needle mechanism (ranging from 2.5 mm to 8.0 mm in diameter) that ensures centered, uniform core geometry while preventing inner-wrap distortion or pin-withdrawal damage.
• Closed-Loop Active Separator Tension Control: Dual-roll active separator decoilers utilize proximity sensor feedback and dedicated stepper motors to smoothly regulate web tension during high-speed acceleration, steady-state winding, and deceleration.
• Integrated Dust and Particulate Removal: Equipped with specialized electrode cleaning assemblies that remove loose active material dust and slitting burrs prior to winding, significantly reducing internal micro-short risks.
• Flat Horizontal Termination Taping: Features an automated horizontal taping station that applies termination tape perpendicular to the cell tabs without over-tensioning the jelly roll, guaranteeing a flat, bubble-free, and securely bonded outer wrap.
• Precise Overhang and Alignment Control: Delivers strict alignment tolerances within ±0.5 mm for both separator-to-electrode and anode-to-cathode interfaces, fulfilling the mandatory industry safety standard of complete separator wrap over anode and anode over cathode.
• Adjustable Multi-Stage Winding Speeds: High-torque Panasonic servo drive allows multi-step velocity profiles tailored to specific electrode lengths, thicknesses, and substrate mechanical properties, achieving throughputs of up to 8 to 11 cells per minute.
• Automated Workstation Indexing and Ejection: Seamlessly indexes the wound core from the winding zone to the cut-and-tape station, finishing with automatic core discharge for optimal operator ergonomic efficiency.
• Intelligent HMI and Fault Diagnostics: A 7-inch full-color MCGS touchscreen paired with a Panasonic PLC provides real-time recipe management, intuitive parameter calibration, comprehensive fault alarms, and one-key system reset functions.

Applications

Technical Specifications

Why Choose This Product

• Industrial-Grade Precision and Repeatability: Built on a heavy-duty 800 kg structural steel chassis with CNC-machined mounting plates, this machine eliminates high-speed vibration to sustain strict ±0.5 mm winding alignment and deliver ≥98% finished product yields across extended manufacturing campaigns.
• Advanced Cell Safety and Yield Protection: By integrating active stepper-regulated separator unwinding, non-stretch horizontal taping, and in-line electrode dust extraction, the system actively eliminates leading causes of internal cell short-circuits, electrode wrinkling, and core-loosening defects.
• Exceptional Tooling Flexibility for R&D and Production: Rapid changeover mechanisms for winding needles (Ø2.5–Ø8.0 mm) and guide channels allow battery development teams to switch between cell formats (such as 18650, 21700, and custom prototypes) in minimal downtime, maximizing pilot equipment utilization.
• Tier-One Industrial Component Architecture: Powered entirely by world-class automation hardware—including Panasonic servo drives and PLCs, MCGS touchscreens, and AirTAC pneumatic components—ensuring long service life, globally accessible spare parts, and reliable multi-shift operation.
• Turnkey Integration and Application Support: Backed by comprehensive technical documentation, customized needle machining, and experienced engineering support to streamline process validation for pilot manufacturing and battery material innovation.

Contact our technical sales team today to request a detailed quotation, discuss custom winding needle configurations, or evaluate your electrode specifications.

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