ZL-J series coating machine is a professional lithium battery electrode coating equipment.
▲ it is applicable to the coating process of oily or aqueous lithium iron phosphate, oily lithium cobalt oxide, ternary, lithium manganate, nickel cobalt lithium manganate, oily or aqueous negative carbon graphite, lithium titanate and other slurry systems;
▲ using the full-automatic PID closed-loop tension control system, the tension control accuracy can reach the level of ± 1n;
▲ imported standard parts such as Siemens PLC control system and high-precision servo motor are used to ensure the ultra-high consistency and stability of coating products in terms of surface density and size. The proportion of imported standard parts in the standard parts of the whole machine is as high as 85%.
▲ with the characteristics of high-speed coating, high precision and high consistency, it is the preferred coating equipment for power batteries.
II.Technical parameters and main configuration of equipment
Double layer front and back 3-stage unequal interval coating / second side automatic tracking / continuous coating / field lattice coating
15
Roll change mode
Manual
16
Substrate running direction
Forward coating, substrate forward and reverse empty foil operation
（F）Structure introduction of each part：
1、 Unwinding mechanism (double arm double support manual rewinding)
No.
project
Technical parameter
Notes
1
Roller installation structure
CNC processing integral vertical plate installation (thickness 30mm).
2
Roller surface treatment
Surface oxidation treatment of metal aluminum roller, surface hardness HRC65; Over roll circular runout ≤ 20 μ m； Surface roughness Ra0.2; Parallelism ≤ 0.1mm;
3
Tension control system
Double closed loop speed control mode: 1. Swing roll PID synchronous control 2. Servo motor adjusts tension in closed loop. Tension display table shows tension value 3. The adjustable tension range is 0--300n, and tension fluctuation ≤± 1.5%
4
Correction method
Automatic EPC control, stroke 120mm
5
Coiling method
Uncoiling up and down
The roll is fixed with a 3-inch inflatable shaft
Unwinding double air expansion shaft, double-sided support
Manual belt receiving platform, double pressure bar mode
6
Substrate running direction
Forward and reverse
7
Substrate running speed
50m/min
8
Maximum unwinding diameter
Ф500mm
9
Maximum bearing capacity of inflatable shaft
600Kg
10
Number of unwinding inflatable shafts
2 articles
11
Control system
Set the function operation button to complete the operations such as tape connection, pause, emergency stop, forward and reverse rotation, left and right alignment, etc
12
Unwinding speed
The unwinding speed is controlled by PLC according to the set coating speed and real-time tension change data; The unwinding power is provided by AC motor + turbine reducer;
2、 Head structure (one coat, two coats)：
No.
Project
Technical parameter
Notes
1
Installation structure mode
CNC processing thickness of 70 mm integral vertical plate structure, the overall weight of 2.6 tons, increase the ground bearing iron plate, reduce the ground bearing area.
2
Main drive motor
Servo motor
3
Rubber roller structure
To prevent the tension instability caused by the non separation of tension and ensure the stability of the coating surface density.
4
Distance adjustment between die head and coating roller
The servo motor cooperates with the high-precision absolute displacement sensor for closed-loop tracking control. The distance is set through the screen, 1~5000um, the adjustment resolution is 0.1um, and the repeated positioning accuracy is ≤± 0.3um.
5
Die head selection
The die lip of Mitsubishi special extrusion head is made of high wear-resistant and corrosion-resistant cemented carbide steel, and the surface is treated with tungsten carbide or chromium nitride. The straightness and flatness are ≤ 1.5 µ M
6
Die cavity structure
The multi pressure cavity slit (spray) coating head is adopted, which has strong process adaptability and helps to balance the transverse pressure, so as to make the transverse coating thickness consistent; The upper die of the coating head is designed with a deflection adjusting mechanism, which can adjust the parallelism of the upper and lower die lips
7
Pressure monitoring system
Feed pressure monitoring, reflux pressure monitoring, die cavity pressure monitoring; It can monitor the feeding process in real time, and give an alarm when there is blockage, with an accuracy of ≤ 0.001mpa
8
Feeding system
Japanese bingshen precision screw pump (2nbl15f (sus+epdm) pump) + precision servo motor, an effective 60L turnover bucket (material container), and has the functions of liquid level detection and liquid level mixing to prevent the sedimentation and overflow of slurry.
9
Coating intermittent function
Servo intermittent control valve system is adopted to ensure the stability of coating size.
10
Head and tail thinning function
The servo intermittent control valve system can adjust the head and tail thinning time and the stroke of the intermittent valve switch to adjust the head and tail thickness in real time.
11
Die head horizontal adjustment function
Adopt precise linear guide rail guidance and manual horizontal adjustment mode, so that the die head can be slightly adjusted ± 10mm in the horizontal position; Ensure the vertical alignment accuracy of the front and back sides
12
Matching and assembly of the upper part of the die head and the lower part of the die head
The digital torque wrench is used to ensure the assembly consistency and accuracy of the die head.
13
Roller surface treatment
Surface oxidation treatment of metal aluminum roller, surface hardness HRC65; Over roll circular runout ≤ 20 μ m； Surface roughness Ra0.2; Parallelism ≤ 0.1mm;
14
Coating roll (steel roll)
The surface is plated with imported hard chromium, with a diameter of Φ 295mm;
15
Tension
Full automatic PID closed-loop control constant tension, tension range 1 range 0~50n, tension control accuracy ± 1n
16
Stand alone head position
Installation and operation before drying
17
Laser alignment function
The laser alignment function is used to manually judge the alignment degree.
3、 Drying channel (suspension oven)
No.
Project
technical parameter
Remark
1
Oven structure
The first four sections are the main transmission ship structure, and the last six sections are the suspension oven structure.
2
Oven length
40 meters (4 meters / section, 10 sections in total)
3
Texture of material
Stainless steel, inner tank national standard SUS304, outer tank national standard SUS201
4
Driving mode of oven guide roller
The first four sections are the main transmission structure, and the last six sections are the suspension oven
5
temperature control
It is divided into the protection control of normal working temperature control and overtemperature monitoring alarm. In case of overtemperature, an audible and visual alarm will appear, and the main heating power supply will be cut off; Each section is completely controlled independently
6
Heating way
Electric heating, hot air circulation structure
7
Heating power of single section oven
Single section 24kw/4m (maximum starting power)
8
Temperature in drying channel
Design Max150 ℃, temperature difference in the area of single section oven ≤ 5 ℃
9
Box surface temperature during operation
≤45℃； The cotton filling thickness is 100mm;
10
Blowing mode
Upper and lower air blowing, upper and lower air volume can be controlled respectively through valves, which can be fine tuned; The upper and lower air chambers share the heating body
11
Exhaust volume control of each section
Independent control and fine adjustment through mechanical valve
12
Air nozzle structure
The blowing direction of the first four sections is 30 degrees from the horizontal, and the air nozzle groove is slotted with a special mold. The last five sections are adjustable air nozzle hooks.
13
Fan control
AC contactor control
14
Heating control
Solid state relay
15
Fan material
National standard SUS304 stainless steel
16
Solvent recovery system
No, only assist in the installation of interfaces
17
NMP solvent concentration alarm
Provide installation interface. (to be quoted separately)
18
Air chamber pressure monitoring
None (this function needs to be quoted separately)
19
Exhaust air volume
35000 m3 / h max
4、 Traction mechanism: (2 sets)
No.
Project
technical parameter
Notes
1
Marching correction
Installed at the outlet of drying channel, automatic EPC control, swing ± 15 degrees, photoelectric sensor
2
Tension
Double closed loop speed control mode: 1. Swing roll PID synchronous control 2. Servo motor adjusts tension in closed loop. Tension display table shows tension value 3. The adjustable tension range is 0--300n, and tension fluctuation ≤± 1.5%
Tension partition is realized by pinch roll and traction roll
3
Installation structure mode
Installation of integral vertical plate of CNC machining center (thickness 30mm)
4
Traction roller
160mm steel roller
5
Pinch roll
Ø 120mm rubber roller, surface bread EPDM
6
Drive motor
The traction roller is driven by Siemens Servo motor + precision reducer
5、 Rewinding mechanism (disc type double shaft automatic rewinding)：
No.
Project
technical parameter
Notes
1.
Installation structure mode
Installation of integral vertical plate of CNC machining center (thickness 30mm)
2.
tension
Double closed loop speed control mode: 1. Swing roll PID synchronous control 2. Servo motor adjusts tension in closed loop. Tension display table shows tension value 3. The adjustable tension range is 0--300n, and tension fluctuation ≤± 1.5%
3.
Rectify deviation
Automatic EPC control, stroke 120mm
4.
Maximum winding diameter
Ø800
5.
Winder inflatable shaft
Article 2 (national standard)
6.
Winding motor
The winding power is driven by Siemens Servo motor + precision reducer
7.
Max capacity
600Kg
8.
Roll change mode
Automatic winding and changing function without shutdown
6、 Control system：
No.
Project
technical parameter
Notes
1
Master control system
Touch screen, PLC, module, servo system
2
Operation mode
Manual, automatic and emergency stop; The whole machine can be operated before and after
The coating line speed, coating setting, head and tail thinning setting, fan frequency and temperature setting can be set, displayed and recorded through the touch screen
3
Setting range of coating and intermittent length
Coating length 20.0 ~ 3200.0mm
4
Alarm condition
Intermittent length: 5.0 ~ 3200.0mm
5
Counting function
When the equipment fails, the touch screen will display the corresponding correction screen
≤ 1mm (related to slurry viscosity and binder characteristics)
B (abnormal head area)
5mm
C (tail abnormal area)
6mm
D (edge effect area)
≤3mm； Thickness -10 um
E (length error)
±0.5mm
F (width error)
±0.5mm
M (width error)
±0.5mm
G1 (head thickness)
-5~+5um
G2 (tail thickness)
-5~+5um
H (blank error)
±0.5mm
I (positive and negative alignment error)
±0.5mm
J single surface density (remove areas B, C and D)
Within 1.2%
Length range
L1 (film length)
20.0～3200.0mm
L2 (intermittent length)
5.0～3200.0mm
L1 /l2 (coating + intermittent length)
L1 +L2 ≥120mm
3、Measuring method
A. Measuring area: 3mm at the edge, 5mm at the end and 5mm at the beginning.
B. Measure dimensions Φ 40mm or according to the process requirements of the demander
IV、 Installation and use environment
1) The ambient temperature of the machine head is 20~30 ℃, and the rest is 10~40 ℃; 2) Relative humidity of the machine head: positive RH ≤ 35%, negative RH ≤ 98%, and the rest ≤ 98%;
V、Supporting facilities
1) Power supply: 3Ph 380V, 50Hz, voltage fluctuation range: +8% - 8%; The total starting power of the power supply is 280KW; 2) Compressed air: after drying, filtering and stabilizing, the outlet pressure is greater than 5.0kg/cm2;
VI、Device orientation (optional)
Attached table: detailed list of equipment pre acceptance and formal acceptance inspection items (inspection results are attached with acceptance report)
No.
Inspection items
Inspection standard
Inspection method
1.
Device configuration parameters
Overall dimension of equipment: L (56000mm) *W(4000mm) *H (4000mm)
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