Rack Gap Coater Machine for Battery Production Line

1. Process Flow

The base material of the polar plate placed on the unwinding device enters the unwinding tension system after automatic correction, and enters the coating head after adjusting the unwinding tension. The polar plate is coated according to the setting procedure of the coating system. The coated wet electrode piece enters the oven and is dried by hot air. The tension of the dried pole piece is adjusted by the tension system, and the winding speed is controlled to synchronize with the coating speed. The pole piece is automatically rectified by the rectifying system to keep it in the set position, and is wound by the winding device.

2. Equipment Composition

1) Unwinding mechanism

2) Coating mechanism

3) Oven

4) Export rectifying mechanism

5) Discharge mechanism

6) Winder mechanism

7) Electrical control system

8) Precision feeding system

3. Main Parameter

NO.	Project	Parameter	Remarks
1	Normal Speed of Coating	≤24m/min	Normal coating speed is related to material system, coating thickness and solid content
2	Coating Speed Accuracy Error	≤0.1m/min
3	Coating Width	≤650mm
4	Coating Length (Single Piece)	≤2500mm
5	Coating Machine Speed	40m/min
6	Overall Length of Coater	≤43m	It has a great relationship with configuration
7	Equipment Air Pressure	0.6～0.8 MPa	Dry and free of impurities
8	Single Side Coating Dry Thickness Error	Li(NiCoMn)O2, LiFePO4, Cobalt±2μ (Mn±2μ)	Edge, head and tail 8mm are excluded
9	Double Side Coating Dry Thickness Error	Li(NiCoMn)O2, LiFePO4, Cobalt±3.0μm (Mn±3μ)
10	Single Side Weight Error in Single Chip	±1.5%	Measurement method (Fig. B)
11	Minimum Coating Length	20mm
12	Minimum Length Dimension of Single Pole Piece	50mm	(One coating plus gap)
13	Minimum Length Dimension of Single Double Segment Pole Piece	100mm	(Two coatings plus gap)
14	Single Side Thickness Error of Electrode Head and Tail	-10μm~ +5μm
15	Interval Coating Minimum Gap	10mm	With the coating speed, the faster the speed, the greater the minimum gap.
16	Accuracy Error of Coating Length	±1.0 mm	Within 3000mm
17	Overlap Error of Front and Back Coating	±0.5 mm
18	Overlap Error of Front and Back Coating Edge	±0.5 mm
19	Edge Uniformity Error of Winding	± 1 mm (start calculation after 5 turns)	Φ 500mm roll