Roll to Roll Slot Die Coater For lithium battery manufacturing

Model: MR-SDCM350-1m

The slot die coating machine plays a pivotal role in the manufacturing of lithium batteries by precisely applying thin, uniform coatings of various materials onto conductive foils, typically copper for the anode and aluminum for the cathode. This process is crucial to ensure that the batteries meet stringent design specifications regarding dimensions, weight, and performance characteristics.
Comprising essential components such as the unwinding unit, head unit, oven unit, traction unit, and winding unit, the slot die coater facilitates the smooth operation of the coating process. Each unit contributes to different stages of the process, from material preparation to final winding, ensuring efficiency and consistency throughout.

Versatility in Coating

The slot die coating machine accommodates a wide range of slurry systems used in battery production. This includes oily or aqueous formulations of materials such as ferrous lithium phosphate, lithium cobaltate, ternary compounds, lithium manganate, lithium nickel cobalt manganate, sodium ion active materials, and graphite-based negative electrodes like lithium titanate. This versatility enables manufacturers to adapt to various battery chemistries and formulations, supporting flexibility and innovation in battery design.

Precision and Performance

Known for its high precision, consistency, and capability for high-speed shoe coating, the slot die coater stands as the preferred choice for lithium battery production. Its ability to uniformly apply coatings at controlled thicknesses enhances the quality and reliability of battery manufacturing processes. This precision is critical in achieving uniform electrode coatings, which directly impact battery performance, longevity, and safety.

The slot die coating machine not only supports the current demands of lithium battery manufacturing but also enables advancements in battery technology by facilitating the development of next-generation materials and designs. Its role in ensuring uniformity and reliability underscores its importance in the pursuit of efficient energy storage solutions.

Technical Parameters

No.	Name	Specifications
1	Overall Size	L 2150 * D 1350 * H 1250 mm(Not include the feeding system)
2	Power Supply	AC380V five-wire, three-phase main wire uses 10mm² or above, neutral wire 6mm², ground wire 6mm², main power switch 60A.
3	Air Source	Dry gas ≧0.7MPA, 20L/min.
4	Power	1-section oven: startup power ≈16kW, average operating power ≈11KW/H. (depending on heating temperature) (heating tube 9KW, fan 0.75KW).
5	Substrate Material Range	Copper foil 6um～35um Aluminum foil 6um～35um
6	Effective Coating Width	Coating width ≤ 280mm, coating roller and over roller length 350mm
7	Single-sided Coating Thickness Range	Primer range: 25um～250um; Topcoat range: 25um～250um
8	Coating Accuracy	The surface density of a single surface is ≤±1.2%. (Based on the positive electrode material as the inspection standard, excluding the 8mm range of the head and tail edges)
9	Effective Coating Length Range	The gap coating length is 10mm~9999mm; the gap length is 5mm~9999mm, and the coating length + gap length ≧50mm.
10	Coating Length Accuracy	Coating length ≤±0.3mm, gap length ≤±0.3mm, average length deviation ≤±0.5mm, tail length ≤±0.5mm, coating width ≤±0.5mm, front and back alignment ≤±0.5mm. (The coating length must be less than 1000mm as standard)
11	Suitable Slurry	Lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, ternary battery positive and negative electrode coating process
12	Suitable Solvent	NMP/ Water-based
13	Suitable Solid Content	35-75 %
14	Suitable Slurry Viscosity	Negative electrode 2000~8500 Cps; Positive electrode 3000~15000 Cps;
15	Operating Speed	Design coating speed 0.5m/min～1.0m/min (actual coating speed is related to the coating formula); mechanical speed 0.5m/min～2m/min
16	Drying Temperature Range	Room temperature ~ 150 degrees Celsius, temperature deviation ≤ ± 3 degrees Celsius, each zone is independently set and controlled
17	Winding and Unwinding Deviation Correction Accuracy	≤±0.5mm

Installation Site Environment Requirements

Relative humidity: 10~80%HR.

Power supply: three-phase 380V, 50HZ, more than 60A power, voltage fluctuation range: +10%~-10%.

Compressed air: after drying, filtering and voltage stabilization: air pressure greater than 6.0KG/cm^2.

Ground connection: protective grounding.

The purchaser is responsible for the power designed by the supplier. The air source is required to be installed near the on-site coating machine. Each device is required to have an independent power air switch and air source interface.

The air inlet and exhaust duct valves and exhaust fans outside the coating machine shall be provided by the purchaser.

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Roll To Roll Slot Die Coater