Service Overview
The battery calendering machine is designed for continuous compression of lithium-ion battery electrodes to improve electrode density and thickness consistency during battery manufacturing. It is suitable for both anode materials (graphite, silicon-carbon) and cathode materials (LFP, NMC, LCO).
The machine uses Φ400×450mm hardened chrome-plated rollers (HRC66-68, Ra≤0.02) and provides ±2µm thickness control accuracy at speeds up to 12 m/min with a maximum rolling force of 200 tons. It integrates infrared EPC correction (±0.1mm), PID tension control (±5N), and oil-heated rollers (50–150°C) to maintain stable electrode thickness and density during continuous operation.
Working Principle
The battery calendering machine works by passing coated electrode materials between two precision-controlled rollers. The rollers apply continuous pressure to compress the electrode coating layer, improving electrode density and reducing thickness variation.
During operation, the tension control system maintains stable electrode feeding, while the roller gap adjustment and temperature control system ensure consistent processing results.
Processing Materials
The battery calendering machine is suitable for various lithium-ion battery electrode materials, including:
Graphite anode electrodes
Silicon-carbon anode electrodes
LFP cathode electrodes
NMC cathode electrodes
LCO cathode electrodes
It is widely used for electrode preparation in EV batteries, energy storage batteries, and laboratory battery development.
Key features
Heavy-Duty 45# Steel Frame
With wedge-type gap adjustment (0.001mm precision) and hydraulic pressurization (50MPa).
Electrode Edge Control System
(300–420mm width) and roller wiping system to prevent graphite adhesion (for anodes).
Mitsubishi PLC and touchscreen HMI
For digital control of speed, pressure, and roll gap.
3-inch inflatable shafts
Support max 300kg coils (φ500mm) with ≤±0.4mm winding alignment.
The battery calendering machine is suitable for lithium-ion battery electrode production in R&D laboratories, pilot lines, and mass manufacturing facilities. It supports continuous electrode processing for EV batteries, energy storage batteries, and other lithium-ion battery applications.
Equipment composition
|
S/N |
Component Name |
Composition |
Quantity (set) |
|
1 |
Rack panel assembly |
Rack electrical box, side panels, installation panels, etc. |
1 |
|
2 |
Unwinding components |
Unwinding air shaft, unwinding adjusting roller, locking cylinder, unwinding correction, etc. |
1 |
|
3 |
Splice platform components |
Pressure rod cylinder, pressure rod, belt joint table |
1 |
|
4 |
Unwinding tension components |
Tension controller, tension sensor, tension roller |
1 |
|
5 |
Drive components |
Driving motor, driving roller, driving pressure roller, pressure regulating mechanism, etc. |
1 |
|
6 |
Electrode Guiding Roller Assembly |
Slitting front adjusting roller mechanism, slitting rear upper adjusting roller mechanism, lower adjusting roller mechanism, |
3 |
|
7 |
Dust removal components |
Tool holder dust removal mechanism, electrode powder brush dust removal mechanism after slitting |
3 |
|
8 |
Press belt assembly |
Upper pressure belt mechanism, lower pressure belt mechanism |
1 |
|
9 |
Winding components |
Winding differential shaft, winding pressure wheel, winding drive motor |
1 |
Main components
1. Unwinding mechanism
The unwinding mechanism adopts an integrated design with the main machine frame to ensure stable electrode feeding accuracy during the calendering process.
The independent unwinding correction and tension control system improves electrode feeding stability and maintains consistent web tension during operation.
The optimized mechanical structure improves overall rigidity and operational stability during continuous electrode processing.
|
Unwinding Department: |
3 inch air shaft unwinding |
|
Unwinding diameter: |
Max Φ450 |
|
Correction control method: |
Manual/automatic switching |
|
Correction system: |
Photoelectric correction system; overall correction stroke 0-100mm ; |
|
Tension Department: |
Tension range: 50-200N Tension control accuracy: ≤±1.5N Tension control method: closed loop control |
2. Calendering Roller System
The calendering roller system consists of precision-machined upper and lower rollers with hardened chrome-plated surfaces. The roller gap and pressure are accurately controlled to achieve uniform electrode thickness and density during continuous processing.
The Φ400×450mm rollers provide stable compression performance with a maximum rolling force of 200 tons. The temperature-controlled roller system helps maintain consistent electrode quality during high-speed operation.
|
Slitting cutter frame: |
The lower cutter is not adjustable (to ensure accuracy and eliminate artificial raw and cooked differences), and the bite amount is adjustable |
|
The upper is adjustable, and the optimal line speed ratio can be selected according to the slitting process and effect. |
|
|
Upper is fixed with a precision spacer to fix the slitting width (the spacer thickness accuracy is +/-0.002mm) |
|
|
There are knife in and out adjustment rollers in front and behind, and the upper adopts independent servo drive |
|
|
Electrode powder |
There should be no erasable debris or exposed foil on the winding , and no obvious The jagged and warping phenomenon Electrode edge is smooth without ruffles (edge thickness variation ≤5%) |
3, Gap Adjustment System
The precision gap adjustment system controls the distance between the upper and lower rollers with high accuracy. It helps maintain stable electrode thickness and improves consistency throughout the electrode roll.
4,Tension Control System
The closed-loop tension control system monitors and adjusts electrode tension during unwinding and rewinding. It improves feeding stability and prevents electrode deformation during continuous calendering.
5, Rewinding Mechanism
|
Electrode mechanism: |
Two sets of differential shafts ( 3 inches) winding |
|
Winding diameter: |
Max Φ 350 mm |
|
|
1. A magnetic rod is set behind the dust removal mechanism to remove magnetism; 2. The placement distance between the front and back sides and the mooring material is adjustable at 5-10mm; 3. Magnetic strength: 10000GS. |
|
Winding roller: |
Upper and lower winding shafts has a set of pressing wheel mechanism, which makes the winding more stable and effectively prevents defects such as edge bursting of the roll; |
|
Winding tension part: |
Tension range : 50 - 100N control accuracy: ± 1.5 N |
|
Structure: Two sets of winding differential shafts, the differential shaft air pressure is controlled by an electric proportional valve |
6,Electrode Dust Removal System
The dust removal system uses vacuum suction and brush cleaning technology to remove electrode particles generated during processing. It helps maintain a clean working environment and improves electrode surface quality during continuous production.
|
Vacuum cleaner |
1. It is composed of centrifugal fan + filter and chassis; 2. Fan power 3 KW, air volume 3500 cubic/H; 3. Filter air primary filter; 4. Inlet diameter 90 , wind speed 23 m/s. |
|
Dust removal mechanism |
1. Dust removal for materials, divided into upper and lower layouts; 2. Two sets of rear dust removal mechanisms at the top and bottom to enhance dust removal; 3. Reverse roller brush vacuuming; 4. The brush is driven by a stepper motor; 5. The lower has straight-line felt + vacuum duct; 6. Integrated pipeline suction. |
Application Cases
Partner Company
Frequently Asked Questions
What is a battery calendering machine used for?
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A battery calendering machine is used to compress lithium-ion battery electrodes after coating. It improves electrode density, thickness consistency, and overall battery manufacturing quality.
What is the maximum rolling force of this machine?
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This battery calendering machine provides a maximum rolling force of 200 tons for continuous electrode compression.
What materials can be processed by the battery calendering machine?
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It can process graphite, silicon-carbon, LFP, NMC, and LCO electrode materials used in lithium-ion batteries.
What is the thickness accuracy of the electrode after calendering?
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The machine provides thickness control accuracy up to ±2μm under stable operating conditions.