The core features of the double-layer split-type high-speed coating machine include dual-layer independent control, split-type structure, high-speed and high-precision, flexible adaptability, and easy maintenance. It balances productivity, precision, and process flexibility in double-sided/double-layer coating of lithium electrode sheets.

I. Core Structure and Process Features

Split-type double-layer architecture

• The upper and lower layers feature independent coating units (die head, back roller, material supply, tension, drying), allowing for separate control of A/B sides or dual-layer materials on the same side.

• The die head/back roll is independently driven by servo motors, with GAP adjustment accuracy of ≤0.1μm and repeatable positioning of ≤1μm.

• Supports dual-sided synchronous coating or single-sided double-layer overlay coating, compatible with different slurries/formulations.

Wide-format high-speed

• The mainstream roller width ranges from 1000 to 1800mm, with a mechanical speed of 120 to 150m/min.

• Independent tension/speed closed-loop, speed accuracy ±0.2%, steady-state tension ±2N.

Precision mechanical platform

• Back roll circular runout ≤1.0–1.5μm, die head parallelism ≤1μm/m.

• The split-type frame features stronger rigidity, reduced vibration, and improved high-speed stability

II. High-precision quality control

• Surface density accuracy: single side ≤±1.2%, double sides ≤±1.0%.

• Size and alignment: Coating size ±0.3–0.5mm, front and back alignment ±0.5mm.

• Thickness uniformity: The thickness fluctuation of the pole piece is within ±1μm.

• Closed-loop control: X/β surface density meter + die servo closed-loop; CCD vision + dimension/defect closed-loop.

III. Core Advantages of the Split Type

Independent control and flexible switching

• The two layers can be independently started and stopped, adjusted in speed, changed in materials, and maintained, without interfering with each other.

• Supports rapid switching between single-sided, double-sided, and double-layer configurations, accommodating production of multiple varieties in small batches.

• A single layer can be activated independently to reduce energy consumption and maintenance costs.

Easy maintenance and high availability

• Modular split design, hydraulic lifting for quick roll/die head change.

• Independent maintenance for both the upper and lower layers, without machine downtime, resulting in a 15%+ increase in utilization rate.

• The failure rate is less than or equal to 2%, resulting in a 30% reduction in maintenance manpower.

Drying and energy saving

• Dual-layer independent bellows/oven, temperature ±2℃, wind speed uniformity ≤5%.

• The split-type layout optimizes the plate path, reducing heat energy consumption by over 35% and decreasing the footprint by 8%.

IV. Full-process automation and intelligence

• Unmanned production line: AGV loading, automatic tape splicing/adhesive application, automatic roll changing, and NG (non-good) removal.

• Dual-station/turret reel-in/out system: No downtime for reel change, reducing downtime by 40%.

• Digital control: PLC + bus, HMI, MES linkage, remote monitoring and diagnosis.