Semi Automatic Z Fold Stacking Machine for Prismatic Lithium Ion Battery Cells

Product Overview

This semi-automatic stacking system is engineered for the Z-fold stacking process used in prismatic lithium-ion power battery cells. It actively unwinds the separator, controls web tension, corrects web position, precisely picks positive and negative electrodes, and builds the stack on a dedicated stacking platform. Four interleaved pressing-blade mechanisms compact the electrode assembly before separator cutting and cell transfer.

The equipment supports battery R&D, pilot lines, and production environments handling rectangular lithium-ion cells. It is suited to manufacturers developing power batteries, laboratories validating electrode and separator formats, and advanced-materials teams requiring repeatable multilayer cell assembly. Configurable stack layer counts within the supported cell-thickness range allow the system to accommodate process-specific layer designs.

Designed around positioning control, contamination management, and handling stability, this unit addresses the process details that affect cell consistency. Active separator unwinding with tension control and web guiding supports alignment throughout the cycle, while secondary electrode positioning and controlled pressing help maintain the specified stack geometry under demanding operating conditions.

Key Features

• Z-Fold Stacking Architecture: The system uses a Z-fold separator process for prismatic lithium-ion battery cells. During reciprocating motion, the handling mechanism shifts the separator from side to side while alternately placing positive and negative electrode sheets onto the stacking platform.

• Active Separator Unwinding: A motor-driven unwinding arrangement feeds separator material from the roll rather than relying on passive payout. This controlled feed supports stable separator delivery into the tension-control and web-guiding stages.

• Continuous Tension and Web Correction: The separator passes through a tension mechanism and a correction mechanism before reaching the stacking platform. This arrangement is designed to support separator alignment and contributes to the specified end-face alignment capability.

• Precise Secondary Electrode Positioning: Positive and negative electrodes are removed from their respective material boxes by vacuum-cup handling mechanisms and positioned again on a secondary positioning platform before stacking. The two-stage approach supports controlled electrode placement at the assembly point.

• Four Interleaved Pressing Blades: Four pressing-blade mechanisms operate in a cross-action sequence on the stacking platform to compact the electrode sheets. This controlled action helps retain the assembled layer arrangement before the separator is cut.

• Electrode-Safe Blade Retraction: Before a pressing blade withdraws, its buffering mechanism raises it slightly to disengage from the electrode sheet. This sequence is intended to prevent electrode pulling and reduce the risk of surface damage during pressing-blade retraction.

• Multi-Measure Sheet Handling Control: Material-box air blowing, sheet-separating brushes, and an external vacuum-cup handler shaking action work together to control multiple-sheet pickup and missed-sheet conditions. These measures target stable single-sheet handling during repeated stacking cycles.

• Integrated Dust Extraction Points: Effective dust-extraction provisions are installed at both the material boxes and the secondary positioning station. Localized extraction supports cleaner electrode handling where sheets are separated, picked, and aligned.

• Semi-Automatic Cell Discharge Workflow: After stacking, the separator is cut and a cell transfer mechanism removes the cell from the stacking platform. The operator applies tape and removes the completed cell while the system begins automatic stacking of the next cell, supporting a practical semi-automatic production sequence.

• Defined Process Performance: The equipment is specified for a stacking speed of 1.3-1.6 s/pcs, with auxiliary time of no more than 15 s. Machine-caused qualified rate and operational availability are specified at at least 98% and at least 95%, respectively.

Applications

Technical Specifications

Incoming Material Specifications

Supported Cell Specifications

Incoming Material Conditions

Why Choose This Product

• Process-Controlled Stack Formation: Active separator feed, tension control, web correction, secondary electrode positioning, and cross-action pressing combine to address the critical operations in a Z-fold stacking cycle.

• Alignment-Focused Engineering: Defined accuracy targets cover electrode-to-separator center deviation, separator end-face alignment, adjacent-electrode alignment, and overall electrode alignment, giving procurement and process teams clear performance criteria.

• Built for Repeated Material Handling: The equipment incorporates dedicated measures for sheet separation, multiple-sheet and missed-sheet control, controlled blade withdrawal, and localized dust extraction at key handling points.

• Practical Semi-Automatic Throughput: Automated stacking proceeds in parallel with the operator's tape application and cell removal steps, while the specified 1.3-1.6 s/pcs stacking speed supports disciplined workflow planning.

• Clear Format Compatibility: Supported electrode, separator, tab, and cell dimensions are explicitly defined, allowing teams to evaluate fit with incoming materials and target prismatic-cell designs before purchase.

Contact us for a quote or to discuss a cell-stacking solution matched to your electrode format, separator roll, and process requirements.

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