1. Equipment Overview

The traction electrode sheet is compacted to a predetermined thickness or density by applying pressure through the gap of the compression rollers. This ensures that the lithium battery produced using the rolled electrode sheet achieves the designed or predetermined volumetric energy density and battery performance.

2. Operation Process

Tension Unwinding → Deviation Correction → Splicing Platform → Edge Trimming and Dust Removal → Electrode Buffering → Rolling (Upper and Lower Rollers with Scraper) → Electrode Buffering → Deviation Correction → Tension Rewinding

3. Technical Parameters

4. Main Component Structure

The electrode continuous rolling production line consists of an unwinding machine, hydraulic roller machine, rewinding machine, electrical control system, electric booster pump, deviation correction device, etc.

1. Unwinding Machine

This device supports the coil material to be rolled and transports it to the rolling mill for rolling. It consists of an integral upright plate installation (thickness 20mm), CNC machining center production, hard chrome-plated frame, linear bearings, deviation correction device, air expansion shaft, magnetic powder brake and tension controller, guide roller, etc.

Main Technical Parameters:

• Unwinding Shaft: Diameter Φ76mm, effective length 500mm; air expansion shaft with control valve, equipped with an air gun

• Max. Unwinding Diameter: Φ400mm

• Unwinding Load Capacity: 300kg

• Tension Controller: 0～25N.m (adjustable), using French KDT tension control device

• Deviation Correction Device: Using Dongdong control system, controller accuracy ±0.2mm (Re).

2. Splicing Platform

Splicing platform: Consists of splicing plate, pressure bar, cylinder, guide rail, integrated with the unwinding machine;

• Splicing Method: Assisted by cylinder-driven pressure bar

• Splicing Width: 400mm

3. Edge Trimming and Dust Removal Machine

Edge trimming and dust removal machine consists of the machine frame, upper cutter, lower cutter, brush roller, vacuum cleaner (provided by user), floating roller, guide roller, etc. It trims off the uncoated areas and edge protrusions to prevent uneven stress during rolling, ensuring a flat electrode sheet. The edge trimming knife is adjustable, with a wide application range.

Main Technical Parameters:

• Knife Speed (max): 40 r/min

• Edge Width: 300 mm～450mm (continuously adjustable)

• Motor Power: 0.75 KW (three-phase 380V 50Hz)

• Weight: Approximately 0.4 T

4. Vibration Reduction Device

The vibration reduction device consists of a frame, fixed guide roller, floating guide roller, linear guide rail, etc. It is used to reduce electrode sheet vibration in gap rolling, preventing sheet breakage.

Quantity: 2 units, one set before the rolling mill and one after, front buffer integrated with edge trimming, rear buffer integrated with rewinding machine.

5. Hydraulic Rolling Mill

The rolling mill is the main equipment in the continuous rolling production line, consisting of a gantry frame, universal couplings, motor reducer, electric booster system, gap adjustment system, electrical control system, feed guard plate, and roller cleaning mechanism. It ensures the electrode sheet reaches the desired density and thickness. The device uses a ball screw wedge block gap adjustment structure, and the rolling speed is infinitely adjustable via a frequency converter.

Main Technical Parameters:

• Overall Dimensions (LWH): Approx. 2850mm×850mm×1500mm

• Roll Specifications (Roll Surface DiameterRoll Surface Width): φ400450mm

• Effective Roll Width: 400mm

• Roll Speed: 2～12rpm, infinitely adjustable

• Roll Material: 9Cr3Mo (product of Xingtai Roll Co., Ltd.)

• Roll Surface Hardness: HRC≥66～68

• Roll Tempering: HB280-300

• Quenching Layer Depth: ≥18mm

• Roll Cylindricity: ≤±0.001mm

• Roll Surface Roughness: Ra=0.04

• Roll Chrome Plating Thickness: ≥0.18mm

• Roll Surface Cleaning: Adjustable blade mechanism, scraper type structure, automatic removal of adhered material with collection box, cleaning blade for both upper and lower rolls;

• No-load Cylindricity: ≤±0.002mm

• Drive Method: Universal coupling drive

• Main Motor Power: 8kW (2*4KW 380V 50Hz)

• Hydraulic Cylinder Specifications: Cylinder diameter φ200mm, stroke 10mm

• Max. Rolling Force: 4000KN

• Roll Line Pressure: 0.45～4.5t/cm

• Gap Adjustment Method: Central wedge block adjustment, hydraulic constant pressure.

• Gap Adjustment Range: 0～3mm

• Roll Bearings: P5 grade high-precision bearings

• Equipment Layout: Drive power part on the left side of the feed end

6. Rewinding Machine

The rewinding machine rolls the electrode material onto the core shaft after rolling. It consists of a frame, linear bearings, deviation correction device, air expansion shaft, rewinding motor, magnetic powder clutch, and tension controller, guide rollers, etc.

Main Technical Parameters:

• Rewinding Shaft: Air expansion shaft diameter: Φ76mm, effective length: 400mm, air expansion shaft with control valve, equipped with an air gun

• Max. Unwinding Diameter: Φ400mm

• Max. Load Capacity: 400kg

• Tension Controller: 0～25N.m (adjustable), using French KDT tension control device

• Deviation Correction Device: Using Dongdong control system, controller accuracy ±0.2mm (Re).

7. Electrical Control System

The electrical part of the equipment is controlled by the operation panel on the control cabinet, consisting of a rolling main motor frequency converter, rewinding motor, electric pump booster system, magnetic powder brake, magnetic powder clutch, tension controller, etc.

1. The unwinding machine controls unwinding tension via a tension controller and magnetic powder brake.

2. The rolling mill is driven by the main motor (variable frequency motor 11kW*2) through a reducer and universal coupling, with frequency converter control for variable speed.

3. The rewinding machine drives the rewinding shaft via a rewinding motor. The tension controller controls rewinding tension through a magnetic powder clutch.

4. The electric pump booster system adjusts and controls the hydraulic cylinder's lifting via a touch screen HMI, driving the rolling lower roll's lifting.

5. The unwinding/rewinding deviation correction control is completed by driving motors for the unwinding and rewinding deviation correction devices.

6. The hydraulic pressure of the rolling rolls is adjusted via the HMI.

7. The rolling roll movement value is displayed on the HMI screen.

8. The HMI inputs adjust the gap of the hydraulic rolling mill rolls.

5. Main Component Brands

6. Random Accessories List

7. Installation Environment Requirements

1. Power Supply: AC380V/50Hz, power approx. 10KW.

2. Compressed Air: 0.5～0.8Mpa, flow rate: 0.04M3/min.

3. Equipment Specifications:

• Equipment Weight: Approx. 5 tons.

• Dimensions: Approx. L (2.85m) x W (0.85m) x H (1.5m).

• Appearance Color: Light grey.

4. Environment Requirements:

• Ambient Temperature: 25±5℃.

• Relative Humidity: 30%～75%RCH, ensure site air is dry and well-ventilated, free from acid and alkali corrosion.

• Ground Connection: Protective grounding.