This equipment is designed for the precision roll-pressing of positive and negative electrode sheets used in lithium-ion batteries. It primarily consists of a unwinding section, edge-cutting section, roll-pressing section, traction section, rewinding section, and an electrical control system. The equipment evenly compacts the coated electrode sheets, ensuring that their thickness, weight, and other parameters remain within the specified process limits—thus providing critical preparatory work for subsequent production steps.

I. Equipment Overview:

1. Introduction to Equipment Functions and Principles

This equipment is used for the precision roll-pressing of positive and negative electrode sheets in lithium-ion batteries. It primarily consists of the unwinding section, edge-cutting section, rolling section, traction section, rewinding section, and electrical control system; ensuring that the coated electrode sheets are uniformly compacted to maintain thickness, weight, and other parameters within the specified process limits, thus preparing thoroughly for subsequent operations.

II. Equipment Functions:

III. Connection Device Specifications:

1) Roll dimensions: φ400mm × 450mm;

2) Roll speed: 0–7 rpm, continuously variable and adjustable;

3) Maximum Preload: 3500 kN;

4) Power connection requirements: 380V/50Hz, with a power rating of approximately 12kW;

5) Connect compressed air: Pressure 0.5 MPa ~ 0.7 MPa, Flow rate: 0.04 m³/min ³ /min;

6) Total weight of connected equipment: approximately 5 tons,

Equipment installation ground load requirement: >2.5 T/m ² , and place a pad at the bottom of the device.

7) Connection device dimensions (L × W × H): approximately 5000mm × 2100mm × 1800mm

400x450 Hydraulic Roll Press Line

IV. Equipment Performance Specifications:

V. Main Component Configuration of the Equipment:

6. Equipment Support The electrode strip continuous rolling production line mainly consists of a unwinding machine, edge-trimming and dust-removal unit, hydraulic roller press, rewinding machine, electrical control system, electro-hydraulic booster pump, and web-guiding device, among other components.

1. Unwinding Machine:

This device is designed to support the coil material awaiting rolling and convey it to the rolling mill for processing. The device consists of components such as a frame, an edge-control mechanism, an air-expanding shaft, a magnetic powder brake with a tension controller, and guide rollers.

Main technical parameters:

Reel dimensions: Diameter: Φ76 mm, Effective length: 400 mm;

Maximum unwinding diameter: Φ450 mm

Maximum weight capacity: 150 kg

Tension Controller: 0–25 N·m (Variable Tension Adjustment)

Correction: Use either the Dongdeng or Puliyuan correction system, with controller accuracy of ±0.2 mm (Re).

2. Edge Trimming and Dust Removal Machine:

The edge-trimming and dust-removal machine consists of a frame, an upper cutting blade, a lower cutting blade, brushes, a vacuum cleaner (provided by the user), as well as floating rollers and guide rollers. Its primary function is to trim off the uncoated areas and any protruding edges on both sides, preventing uneven stress distribution between the coated sections and the non-coated edges during the rolling process. This ensures consistent stretching and ultimately avoids irregularities in the electrode sheets. The trimming blades are adjustable, with pneumatic pressure applied for precise cutting, making the machine suitable for a wide range of applications. Additionally, brushes clean the dust from the material strip, while the vacuum cleaner efficiently removes the collected dust from the electrode sheet surface. Finally, floating rollers help regulate tension, minimizing vibrations in the electrode sheets.

Main technical parameters:

1) Cutting blade speed (max): 40 r/min

2) Edge trimming width: 300 mm to 400 mm (continuously adjustable)

3. Hydraulic Roll Press:

The rolling mill is the primary equipment in a continuous rolling production line, comprising components such as a rigid frame, roll stands, precision gear transmission systems, motor-reducer units, electro-hydraulic boosting systems, gap-adjusting mechanisms, electrical control systems, feeding guard plates, and roll-surface cleaning devices.

The primary function is to ensure the electrode sheet achieves the appropriate density under the pressure of the rollers, while also meeting the required electrode thickness based on the coating thickness. This equipment features a lead screw and wedge iron mechanism for precisely adjusting the roller gap, and its linear speed is continuously variable via an inverter-controlled system.

Main technical parameters:

1) Overall dimensions of the roll main unit (length × width × height): approximately 2100mm × 1140mm × 1700mm

2) Roll specifications (roll surface diameter × roll surface width): φ400 × 450 mm

Effective working width of roll surface: 400mm

Roller speed: 0–7 rpm

Roller material: 9Cr2M

Roller surface hardness: HRC ≥ 66–68

Roller tempering: HB280-300

Straightness: ≤ ±0.001 mm

Roll diameter runout: ≤ ±0.002 mm

Roller cylindricity: ≤0.002mm

Roller surface roughness: Ra = 0.2

3) Transmission method: High-precision gear transmission

4) Main motor power: 7.5 kW (380V, 50Hz)

5) Rolling line speed: 0–8.5 m/min (frequency conversion speed control)

6) Hydraulic cylinder specifications: Bore diameter φ200 mm, stroke 10 mm

7) Maximum Preload: 3500 kN

8) Adjustment method: Use the middle wedge block to adjust the hydraulic constant-pressure clamping.

Roll gap adjustment range: 0–2 mm;

Roll gap adjustment accuracy: 0.005 mm;

9) Roll bearings: P52 high-precision bearings

10) Compactor weight: approximately 4.2 tons

11) Equipment Color: Supplier's Standard Color

12) Equipment arrangement direction: The drive unit is located on the left side at the feed end.

4. Winding Machine:

The function of the winding machine is to roll the electrode material—after it has been compressed—onto a core shaft. This device consists of components such as a frame, an edge-guiding system, an air-expanding shaft, a winding motor, a magnetic powder clutch, a tension controller, and guide rollers.

Main technical parameters:

1) Winding Shaft: Pneumatic shaft diameter: Ф76mm Effective length: 400mm

2) Maximum winding diameter: Φ450mm

Maximum load capacity: 150 kg

3) Magnetic Powder Clutch: MFL-25K

4) Tension Controller: 0–25 N·m (Adjustable)

5) Correction: Utilize either the Dongdeng or Puliyuan correction system, with controller accuracy of ±0.2 mm (Re).

5. Electrical Control System:

The electrical components of the entire equipment are controlled via the operation panel on the electrical control cabinet, and consist of parts such as the main motor frequency converter for compaction, the winding motor, the pneumatic-hydraulic boosting system, the magnetic powder brake, the magnetic powder clutch, and the tension controller.

1) The unwinding machine controls the unwind tension via a tension controller connected to a magnetic powder brake.

2) The dust removal function is achieved using an industrial vacuum cleaner (to be provided by the user).

3) The rolling mill is driven by a main motor (a 7.5kW variable-frequency speed-control motor), which, via a gearbox and gear transmission, rotates the rolls. The frequency converter controls and enables variable-frequency speed regulation.

4) The winding machine is driven by a winding motor, which rotates the winding shaft to achieve the winding process. The tension controller regulates the winding tension via a magnetic powder clutch.

5) The gas-liquid pressurization system controls the lifting and lowering of the rolling lower roller by operating a manually controlled valve to move the cylinder up and down.

6) The take-up and rewind web guiding control is achieved by driving motors that separately operate the unwind and rewind machines' web-guiding mechanisms, thereby completing the take-up and rewind web guiding process.