Lab-Scale Slot Die Extrusion Coater for Battery Electrode R&D

I. Equipment parameters

1.Basic material thickness: Aluminum foil: 0.010-0.030mm, Copper foil:0.06~0.030mm

2. Basic material width: Aluminum foil:100-320mm, copper foil: 100-320mm

3.The max. thickness of wet coating:8—400um(Viscosity of the slurry be allowed)

4.The Max. coating width:300mm, the max. coating roll width:340mm

5.The mechanical tape speed:0.5-7m/min

6.The coating speed:0.5-1.5m/min (different from the slurry material thickness, viscosity(The speed is different according to the slurry. This parameter is only based on the 6m oven length and the coating requirements of the lithium battery, and a range is for reference.The coating of ultracapacitors is faster, and usually can be set to about 2M/min) .

7.Drying oven length: 1 part dry oven * 1.2m/part=1.2m

II．Equipment specification

1. Coating method:Slot die coating

Intermittent coating distance: 5—8000mm±1mm (adjustable according to battery specifications)

2.Coating precision:dry thickness of the accuracy tolerance::single-side cathode:±2.5um, anode:±2.5um (cross-section measurement 4-5 points, vertical section measurement spacing is 100mm)

3. Coating the positive and negative alignment tolerance : <± 1.0mm

4.The average length tolerance:≤±1.0mm

5.The average width tolerance:≤±1.0mm

Remarked: The first and second indicators above should have the best effect when the slurry conditions (viscosity, particle size, uniformity, etc.) match the settings of the equipment parameters

6.Battery inner diameter:3 inch, Adopt the air expansion roller

7.Tension control: Coated floating roller tension PID control

8.Deviation correction control accuracy: ±0.01mm, deviation accuracy:±1mm

9. The operator operates the coating mechanism from the front

10.Dry Type:

A.Hot air drying, hot air circulation(on the supply air)

B.Heating: electric heating 4.8KW*1 part=4.8KW

C.Heater

11.Oven length:1part*1.2m/part=1.2m

12.Oven material: Stainless steel

13.Oven temperature:Room temperature—150℃,adjustable, temperature control accuracy ＜±5

III．Technological process

The electrode substrate placed on the unwinding device is automatically rectified and then enters the swing arm tension system. After adjusting the unwinding tension, it enters the coating head, and the electrode slurry is coated according to the setting program of the coating system. The coated wet electrode enters the oven to be dried by hot air. After drying, the tension of the electrode is adjusted by the tension system, while the winding speed is controlled to synchronize it with the coating speed. The electrode is automatically corrected by the correction system to keep it in the center position, and the winding device is used for winding.

Contact :Joy Zhong Email : joy@libgroup.net