High Precision Lithium Battery Electrode Sheet Calendering Machine

Product Overview

This high-precision electrode calendering system compacts loose coated electrode sheets through a controlled pressure roll nip. The combined action of applied roll pressure and precisely set gap reduces the sheet to its required thickness or compaction density. This gives battery manufacturers a direct, repeatable means to support the designed volumetric energy density and intended electrochemical performance of finished cells.

The equipment is built for lithium-ion battery electrode production, including rolling coated active-material sheets within a 150-400 mm working-width range. It supports continuous roll-to-roll processing with integrated unwinding, rewinding, edge trimming, web-guiding, and adjustable tension functions. The platform is suited to pilot production, process-development facilities, and manufacturing lines that need dependable compaction control for coated electrodes.

Precision-machined rolls, high line-pressure capability, accurate digital gap adjustment, and controlled web handling provide a stable foundation for demanding electrode processes. The system is engineered for installations with appropriate concrete support, conditioned compressed air, and a dry, ventilated, non-corrosive environment, helping preserve consistent mechanical performance during sustained operation.

Key Features

• High-Load Roll Compaction: The two-roll assembly provides up to 4000 kN line pressure to compact coated electrode material effectively. This capability supports high-density processing where the final sheet thickness and compaction condition must be closely controlled.

• Fine Digital Gap Adjustment: The roll gap adjusts from 0-2.0 mm with a digital setting adjustment accuracy of 0.001 mm. Left-to-right gap consistency between the two rolls helps maintain uniform compression across the active processing width.

• Precision Rolling Performance: Rolling accuracy is specified at <= +/-0.0015 mm, with coating accuracy <= +/-0.003 mm. These tolerances support process control where electrode thickness consistency is important to downstream cell fabrication requirements.

• Hardened, Durable Roll Construction: The rolls have hardness of HRC >=67, hardness uniformity <= HS +/-2, and a non-attenuating hardened layer of at least 19 mm. This robust surface design is intended to withstand repeated high-pressure calendering duty while retaining stable working characteristics.

• Controlled Roll Surface Geometry: Roll surface roughness is Ra <=0.2, roll straightness is <= +/-0.0015 mm, and installed radial runout is <= +/-0.0025 mm. Inspection reports are provided for the specified hardness and surface roughness requirements.

• Continuous Web Processing: Operating speed reaches up to 20 m/min, enabling continuous electrode processing rather than discrete batch pressing. The equipment combines controlled calendering with winding functions to support orderly material flow through the production line.

• Integrated Roll Handling: The unwinding and rewinding system accommodates rolls up to 500 mm diameter, 400 mm width, and 300 kg weight, using a Phi 76 mm roll core. This provides a defined handling envelope for production electrode web materials.

• Stable Tension and Alignment: Adjustable unwind/rewind tension from 0-50 N and a maximum web-guiding accuracy of 0.2 mm help maintain web control through the rolling path. Stable alignment is particularly important for maintaining usable material width and orderly finished rolls.

• Precision Winding Shafts: The winding shafts maintain radial runout <= +/-0.03, coaxiality <= +/-0.03, and roll-surface roughness Ra <=0.15. These controlled shaft characteristics help support stable winding and unwinding behavior during continuous operation.

• Industrial Installation Design: The 30 kW main motor and 30 kW total-power requirement, plus a 10% safety factor, match the machine's high-load duty. Defined electrical, pneumatic, environmental, and foundation requirements allow facilities to prepare the installation site appropriately before commissioning.

Applications

Technical Specifications

Why Choose This Product

• Precision-led mechanical design: Fine gap setting, controlled roll geometry, and specified rolling accuracy give process teams a defined basis for repeatable electrode compaction.

• Built for sustained high-pressure work: Up to 4000 kN line pressure, HRC >=67 roll hardness, and a minimum 19 mm non-attenuating hardened layer support demanding rolling operations.

• Verified critical roll characteristics: Required inspection reports for roll hardness and surface roughness provide documented confidence in two parameters that directly affect rolling consistency.

• Complete web-control capability: Defined unwind/rewind capacity, adjustable tension, web-guiding accuracy, and edge-trimming range help the equipment operate as a practical continuous electrode-processing system.

• Installation-ready engineering: Clear requirements for power, compressed air, environmental conditions, and concrete foundation capacity enable proper site preparation for stable long-term operation.

Contact us for a quote or a custom solution aligned with your electrode width, roll handling, installation, and battery-production requirements.

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