Fully Automatic Z Type Stacking Machine for Prismatic Lithium Ion Battery Cells

Product Overview

This fully automatic system is designed for Z-type stacking of prismatic lithium-ion battery cells. It coordinates electrode loading, separator unwinding, precision positioning, alternating electrode placement, compression, separator cutting, tape application, and stacked-cell discharge in a continuous automated sequence. The equipment is built to control the alignment relationships that directly affect cell-stack consistency, with electrode-to-separator center deviation controlled to ±0.3 mm and adjacent electrode alignment controlled to ±0.2 mm.

The unit is intended for square-cell manufacturing processes requiring alternating positive and negative electrode stacking with a single outer separator layer. Positive and negative electrode sheets are loaded from separate material boxes, while the separator is actively unwound by a motor, tensioned, corrected for tracking, and moved reciprocally by the stacking table to the left and right placement stations.

For demanding production environments, the equipment combines mechanical positioning, sensor-based inspection, contamination-control measures, and secure structural assembly. Pin-fixed high-speed, high-precision components support repeatable operation, while dedicated dust extraction, non-metal suction rods, electrode-material isolation, and multi-sheet detection measures help protect product quality during automated stacking.

Key Features

• Precision Electrode Positioning: Positive and negative electrode sheets are removed by two robotic suction mechanisms and accurately positioned on a dedicated platform before stacking. The system maintains overall electrode alignment accuracy of ±0.3 mm and adjacent electrode alignment accuracy of ±0.2 mm.

• Controlled Separator Handling: A motor-driven active unwinding system, tension mechanism, integrated module correction, and static-elimination treatment manage separator delivery to the stacking table. Separator end-face alignment accuracy is ±0.3 mm, supporting stable Z-type folding and placement.

• Automated Alternating Stack Formation: The stacking table reciprocates between left and right workstations for electrode placement. Four compression-blade mechanisms operate in an alternating sequence to press and secure electrode sheets as the stack is formed.

• Single-Layer Outer Separator Configuration: The process supports an outer-wrapped separator arrangement without a tail roll, leaving the external layer of the cell stack as a single separator layer. Stacking layer count can be set within the applicable thickness range.

• Integrated Post-Stack Transfer and Taping: After stacking, a robotic gripping mechanism removes the cell stack, cuts the separator, transfers the stack to the tape-application station, and applies tape automatically. The separator tail is blown to the opposite side to initiate the next automatic stacking cycle while the completed stack is discharged.

• Contamination-Control Design: Material boxes and secondary positioning stations include effective dust-extraction mechanisms. Non-metal suction rods are used, and the positive and negative electrode material-box and secondary-positioning areas are isolated to reduce the risk of cross-contamination.

• Multi-Sheet and Missing-Sheet Prevention: Material-box air movement, sheet-separation brushes, and robotic servo vibration work together to separate electrode sheets. Ultrasonic sensors are used to detect multiple sheets and missing sheets before they enter the stack.

• Electrode Tab Protection: Independent suction cups hold electrode tabs during handling. This helps prevent excessively long tabs from folding and becoming incorporated into the cell stack during the stacking sequence.

• Corner and Tab Inspection: Four-corner electrode inspection and electrode-tab inspection are incorporated into the process. These checks are intended to prevent electrode sheets with missing corners or folded tabs from being stacked into the cell.

• High-Speed Structural Reliability: Pin fixing is used for components operating at high precision and high speed. This construction approach supports stable positional relationships during repeated automated motion.

Applications

Technical Specifications

Why Choose This Product

• Alignment-Focused Engineering: The equipment combines dedicated electrode positioning, active separator control, and alternating compression actions to support repeatable stack geometry at specified ±0.2 mm to ±0.3 mm alignment levels.

• Process Continuity: Electrode placement, stack compression, separator cutting, tape application, and finished-stack discharge are integrated into one automated operating sequence. The separator-tail handling method allows preparation for the next cell stack while tape application is completed.

• Quality-Oriented Material Handling: Separate electrode-material paths, dust extraction, non-metal suction rods, multi-sheet detection, and corner and tab checks address handling conditions that can affect stacked-cell quality.

• Production Performance Visibility: Specified performance includes a 99% yield and 98% utilization rate when considering defects and failures caused by the equipment itself, providing procurement teams with clear machine-related operating benchmarks.

• Installation-Ready Requirements: Electrical, compressed-air, environmental, floor-loading, and dimensional requirements are clearly defined to support facility planning and integration review.

Contact us for a quote or a custom solution aligned with your prismatic lithium-ion battery cell stacking process.

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