Products Description
This advanced battery separator coating machine is specifically designed for high-precision coating applications in lithium-ion battery separator production. The system comprises five major functional sections: an unwinding unit, a precision coating head assembly, a thermal drying oven, a tension-controlled traction and winding unit, and a sophisticated electronic control system. The machine’s primary function is to uniformly apply precisely mixed slurry onto the substrate material, maintaining strict control over coating dimensions and weight within specified process parameters. Following the drying process, the coated separator is precisely wound, creating a high-quality intermediate product ready for subsequent manufacturing stages in the battery production process.
Process flow
Substrate unwinding →Tension stabilization→Micro-gravure coating→Drying→Tension stabilization→Correction→Rewinding
Technical Parameters
Substrate parameters
| Item | Battery Separator |
| Substrate | PE, PP |
| Width (mm) | 100～320 |
| Thickness（µm） | 8～30 |
Slurry parameters
| Item | Ceramic slurry |
| Material | Al2O3 |
| Solvent | Deionized water |
| Solid content（wt%） | 3～15 |
| Slurry specific gravity（g/cm3） | 0.6～2.0 |
| Viscosity（mPa.s） | 500-2000 |
Coating parameters
| Item | Battery Separator |
| Coating method | Continuous coating |
| Coating width (mm) | Max:300 |
| Single side coating thickness（µm） | 1～10 |
| Single side coating weight (g/㎡) | 10～25 |
| Coating speed (m/min) | 0.5～3 |
Equipment specifications
| Item | Content |
| Roller width | 400mm |
| Mechanical speed (no load) | Max:5m/min |
| Unwinding specifications | Roll diameter: Max.φ200mm.Load bearing: Max.100kg.Reel specifications: Inner diameter 3 inches, approximately 76.2mm, length≤450mm.Reel material: metal, ABS plastic, paper tube. |
| Winding specifications | Roll diameter: Max.φ200mm.Load bearing: Max.100kg.Reel specifications: Inner diameter 3 inches, approximately 76.2mm, length≤450mm.Reel material: metal, ABS plastic, paper tube. |
| Oven heating method | Electric heating |
| Oven structure | 2 sections × 1.2m/section = 2.4m, single layer |
| Oven temperature | Max：140℃ |
Environmental requirements
| Item | Content |
| Dimensions | The equipment is about L (4.0m) × W (2.1m) × H (1.9m) (width includes electrical cabinet, length does not include operating space) |
| Power requirements | Three-phase AC380V±10%, 50Hz, earth wire.Equipment power: 35KW, number of main power supplies: 1. |
| Compressed air | Compressed air pressure:≥0.6MPa, pressure fluctuation±1% (clean air after water removal, oil-free, filtering and pressure stabilization).Compressed air consumption: 10m³/h, number of interfaces: 1/unit.Interface trachea specification: Φ12mm. |
| Environmental | Ambient temperature: 25±5℃for the coating part (according to the buyer’s process requirements).Relative humidity: 10%~30%RCH (according to the buyer’s process requirements).Cleanliness: Class 100,000 (according to the buyer’s process requirements). |
| Ground requirements | Total weight of coating machine: about 1.3 tons;Cement floor or terrazzo floor, flatness±5mm/㎡, load-bearing capacity≥500kg/m2. |
| Oven air volume | Maximum exhaust air volume, at 140℃: positive pole 1800㎥/h, negative pole 1800㎥/h.Maximum fresh air volume, at 60°C: positive pole 1500㎥/h, negative pole 1500㎥/h. |
