Fully Automatic Lithium Battery Positive and Negative Electrode Sheet Making Machine with Tab Welding and Automatic Rewinding

Product Overview

This fully automatic electrode sheet making system is purpose-built for lithium-ion cell production, combining controlled unwinding, web tension management, deviation correction, ultrasonic tab welding, protective-tape application, inspection, dust extraction, and finished-roll rewinding in one coordinated process. It converts slit electrode rolls into completed electrode sheets with welded tabs and protective tape, then automatically rewinds the processed material into orderly rolls for downstream cell assembly. The integrated workflow reduces manual material handling while maintaining repeatable positioning at critical tab and tape locations.

The equipment is suited to positive- and negative-electrode processing for lithium battery manufacturing, pilot-scale production, process development, and advanced battery R&D. It handles electrode material with thicknesses from 90 um to 250 um, widths from 40 mm to 130 mm, and individual sheet lengths from 300 mm to 2000 mm. Separate positive and negative configurations provide process-specific tape application and welding arrangements, supporting the differing production requirements of each electrode type.

Designed for demanding production environments, this unit uses servo control, ultrasonic welding, roll-pressure rewinding, and dedicated powder brushing with dust collection. In-process confirmation of tab welding and tape application provides immediate visibility of key process steps. When a missing weld or tape condition is identified, the operator can manually reverse the electrode sheet for supplementary welding or tape application, helping protect material value and sustain stable output.

Key Features

• Integrated Electrode Conversion Process: The system brings together roll unwinding, tension control, web guiding, roller transfer, tab welding, tape application, inspection, powder removal, traction, and automatic rewinding. This coordinated sequence limits unnecessary transfers between standalone stations and supports a consistent electrode-processing route.

• Ultrasonic Tab Welding: Standard ultrasonic welding forms the tab-to-electrode connection with a specified welding effective area of at least 80% and welding tensile force of at least 15 N. The process requirements call for no over-welding or false welding, supporting dependable electrical and mechanical tab attachment.

• Controlled Positioning Accuracy: Tab tape position accuracy, tab protective-tape length position accuracy, welding length error, and welding position error are each specified at ±0.5 mm. The rewinding alignment accuracy is specified at ±1 mm, providing practical control over the registration points that affect subsequent cell assembly.

• Dual Verification of Critical Operations: The equipment detects whether tabs have been welded and whether tape has been applied. If either operation is missed, an operator can activate a manual switch to pull the electrode back for corrective welding or tape application instead of immediately discarding the processed section.

• Process-Specific Positive and Negative Configurations: The positive-electrode configuration uses one welding assembly and two protective-tape application paths. The negative-electrode configuration uses two welding assemblies, two sets of opposed tape application, and four protective-tape application mechanisms, matching its specified two-tab process arrangement.

• Stable Roll Handling: Tension control, release correction, and roller guidance direct slit electrode material through the process while the specification requires no wrinkling or wavy edges over the guide rollers. A pressure-roll mechanism at the rewinder is included to help prevent roll edge bursting and maintain a compact finished roll.

• Cleanliness at the Rewind Stage: A powder-brushing and dust-collection arrangement is installed at the rewinding guide roller. The arrangement brushes electrode powder and removes it through extraction, helping keep the finished-roll process controlled where loose particulate can affect handling conditions.

• Durable Cutting and Welding Tooling Requirements: The positive configuration specifies a cutter effective life of at least 1 million cycles and welding-head/welding-seat effective life of at least 1 million cycles. The negative configuration specifies at least 2 million cutter cycles and at least 200,000 welding-head/welding-seat cycles, with a cut-end burr requirement of no more than 0.01 mm.

• Production-Focused Throughput: Both configurations are specified for approximately at least 20 pieces per minute within 1700 mm, with a qualified-product rate of at least 97% and an operating rate of at least 94%. These metrics give manufacturing teams a clear basis for assessing expected process capability.

Applications

Technical Specifications

Why Choose This Product

• Purpose-Built Process Integration: This system is configured specifically for lithium-ion electrode processing, with the essential material-handling, welding, tape-protection, inspection, and rewinding steps arranged as one production sequence.

• Precision Where It Matters: ±0.5 mm requirements for tape and welding locations, together with ±1 mm rewinding alignment, focus control on the process points most relevant to tab placement and finished-roll quality.

• Reliable Production Safeguards: In-process checks for missing welding and missing tape, plus operator-enabled material reversal for rework, give production personnel a direct path to correct identified process omissions.

• Engineering for Sustained Operation: Defined cutter and welding-tool life requirements, controlled guide-roller handling, servo control, and a pressure-roll rewinder support robust day-to-day use under specified production conditions.

• Configuration Matched to Electrode Requirements: Dedicated positive and negative versions retain their distinct welding and tape-application arrangements, allowing procurement teams to select equipment aligned with the intended electrode process rather than compromise on critical workflow details.

Contact us for a quote or a custom solution matched to your electrode dimensions, tab format, and lithium battery production workflow.

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