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Automatic Double Sided Extrusion B-Type Coating Machine For Lithium Battery Production Line


Contact Person:Louis Yang

Email: Louis@chinabatterymachine.com

Tel:+86 13003860308
Whatsapp: +86 13003860308
Wechat:18659217588

  • Item No.:

    LITH-SYD-TJY-7555S-B
  • Payment:

    Credit Card, Paypal, T/T , Western Union, LC
  • Lead Time:

    5 days

New Products

  • Product Details

Automatic Double Sided Extrusion B-Type Coating Machine For Lithium Battery Production Line 


       

 Basic functions of the device

This equipment is used to unwind and transport the substrate to the coating mechanism through

the unwinding mechanism. The slurry is smoothly transported to the coating extrusion die under

certain pressure through the feeding system. The slurry is sprayed onto a single side of the

substrate (copper or aluminum foil) through the extrusion grinding lip. The coated substrate and

slurry are pulled by the device driving mechanism to the drying box for drying. The dried material

is then driven and rolled back. Single sided coating, tandem double-sided coating machine.

 

Characteristics of the equipment

1. Digital tension: The unwinding, rear drive, and rewinding tension can be digitally set on the touchscreen, and the results of the three tension segments can be displayed simultaneously on the touch screen. The adjustment of tension is very convenient, and the smoothness of baseband operation can be clearly understood on the touch screen.

2. Servo with brake: The servo motor with distance control between the mold head and the base wheel is added to the brake, which can eliminate changes in the power-off time distance, thereby reducing the adjustment time.

3. Interrupt control: All places that require speed in a timely manner adopt interrupt control. The result of interrupt control reduces the error in coating length and alignment.

4. Strip coating: Adopting a custom mold head instead of a standard mold head to reduce slurry loss caused by gasket chamfering, making it easy to operate. For strip coating, the edge thickness can be adjusted according to user requirements.

5. Dynamic filtration system: With a special filter structure, it can effectively filter out various impurities and is suitable for liquids of various viscosities. The equipment has good reliability, long maintenance cycles, and low maintenance costs. Compact structure and small footprint. Large filtration capacity per unit area, strong processing capacity, and can be filtered at multiple levels.

 

Hardware and functional description of the device

1. Feeding system: low-speed running slurry mixing tank+Japanese Bing Shen servo pump+servo motor drive+stainless steel pipeline. The main function is to dynamically store and smoothly transport slurry to the filtration system, ensuring that the slurry remains constant at a certain temperature.

2. Filtering system: The core technology of the I series (external scraper type) continuous scraper filter lies in its filter screen and scraper assembly. Each wire cross-section of this wedge-shaped filter screen is triangular, and the outer wall of the filter screen is smooth, which is beneficial for the scraper to remove impurities attached to it. The outside of the filter screen has a triangular opening, so that debris smaller than or equal to the required filtering accuracy will not get stuck on the filter screen, ensuring that the filter always maintains a good working state. When the scraper scrapes over the outer surface of the filter screen, it smoothly scrapes off the blockage on the surface of the filter screen, ensuring that the filter screen remains unobstructed at all times. The large particles intercepted by the scraper from the surface of the filter screen enter the waste chamber and are discharged regularly.

3. Coating machine: unwinding mechanism+coating mechanism+drying+secondary coating mechanism+rear driving mechanism+automatic winding mechanism. Its main function is to evenly coat the slurry on the substrate (copper foil and aluminum foil), dry it, and then wind it up.

 

Software and Function Description

1. The frequency converter and temperature controller both adopt communication control mode, and all fan frequency regulation and temperature setting can be centrally completed on the touch screen, without the need to open the control cabinet for adjustment.

2. The coating function is displayed and adjusted on the touch screen

3. The surface density detection and coating mechanism form a closed-loop control, and the data storage and processing are detailed in the description of the surface density detection equipment.

4. The user provides a network on-site, and our company can achieve remote debugging function.

5. MES system interface shall be reserved for the equipment to facilitate the collection and management of production quality data.

6. If the seller's individual equipment involves upstream and downstream process connections, the user needs to adapt to the upstream and downstream equipment.

 

Technical specifications

I. Main components of the coating machine

1. Unwinding mechanism: 1 set

2. Coating mechanism: 2 sets

3. Drying mechanism (double layer): 10 sets

4. Rear drive mechanism: 1 set

5. Winding mechanism (automatic roll changing): 1 set

6. Electrical control system: 1 set

7. Thickness gauge (dry thickness): 1 set

II. Configuration of key equipment components

No.

Name

Brand

Place of origin

1. 

Coating head mechanical components

2. 

Coating die head

Ningde Zhongneng

Customized according to customer requirements

3. 

Coating roller

40Cr+electroplated hard chromium

Equipped with Japanese NSK bearings

4. 

Front drive roller

40Cr+electroplated hard chromium

Equipped with Japanese NSK bearings

5. 

Guide roller

Shenyanda Customization (Aluminum Alloy Surface Anodization)

domestic

6. 

Coating mechanism guide rail

PMI/TBI

Taiwan

7. 

Coating mechanism ball screw

PMI/TBI

Taiwan

8. 

Coating roller and front drive roller bearing

NSK/NTN

Japan

9. 

Displacement sensor

Panasonic/Delta

Japan

10. 

Pneumatic components

11. 

Die head propulsion cylinder

SMC

Japan/Taiwan

12. 

Electrical proportional valve

SMC

Japan

13. 

Pneumatic components

AIRTAC

Taiwan

14. 

Motor and reducer

15. 

Coating roller and front drive roller servo motor

yaskawa

Japan

16. 

Coating roller, front drive reducer

Alpha/Newcastle/Xinbao

Germany/Japan

17. 

Reel winding reducer

Liming

Taiwan

18. 

Oven roller motor

Liming

Taiwan

19. 

Fan

Stainless steel, multi wing low noise

Guangzhou

20. 

Deviation correction and tension system

21. 

Fully automatic deviation correction

(Winding and unwinding and process correction)

Aibo/Yuze/Dongdeng

Shenzhen/Shanghai/Chongqing

22. 

Tension sensor

(Winding and unwinding, process tension)

Aibo/Yuze

Shenzhen/Shanghai

23. 

Electrical components

24. 

PLC

Panasonic/Huichuan

Japan/Domestic

25. 

PLC digital/analog module

Panasonic/Huichuan

Japan/Domestic

26. 

touch screen

HEYTEK/VIRON

Taiwan

27. 

Temperature controller

Omron

Japan

28. 

Color code sensor

SICK

Germany

29. 

inverter

Tai'an/Yaskawa

Taiwan/Japan

30. 

miniature circuit breaker

chint

France

31. 

contactor

chint

France

32. 

Intermediate relay

chint

France

33. 

Thickness gauge (dry thickness)

Dual/RUIQI

domestic

34. 

NMP concentration alarm

Gastron

Korea

If there are special circumstances, use the same level of brands mentioned above.

III. Usage conditions, basic functions, and technical indicators:

No.

        Project

                Technical Parameter

      Notes

1. 

Slurry system and substrate

2. 

 

Suitable for slurry system

1. Positive pole: Lithium iron phosphate, lithium cobalate, lithium manganate, ternary and other oil-based or water-based systems.

2. Negative electrode: oily or water-based systems such as graphite; Super capacitors and related slurry systems.

 

3. 

 

Suitable for slurry viscosity

Oily solvent 2000-8000 Cps

 

Intermittent coating

 

 

Aqueous solvent 2000-6000 Cps

 

 

 

1000~10000 Cps

Continuous coating

 

 

Suitable for solid content of slurry

Positive electrode slurry

35%~75%

PVDF system

 

 

Negative electrode slurry

S.c.30%~65%

PVDF system

 

 

 

s.c. 30%~65%

SBR system

4. 

Solvent characteristics

Oily solvent NMP (s.g=1.033, b.p=204 ℃)

Aqueous solvent H2O/NMP (s.g=1.000, b.p=100 ℃)

For reference only

5. 

Suitable substrate thickness

Al foilAl): 830um    Cu foil(Cu)4.530um

 

6. 

Suitable for substrate width

350~670mm

 

7. 

Mechanical characteristic indicators

8. 

Design width of roller surface

750mm

 

9. 

Guide roller outside the drying channel

about Ф 120mm aluminum guide roller with hard oxidation on the surface  

finish≤0.8

10. 

Equipment mechanical operating speed

1-60m/min

Infinitely adjustable

11. 

Maximum coating speed

10-35m/mindepending on the slurry system and drying conditions

 

12. 

Full range tension of the entire machine

3~25Kg.ftension fluctuation±2%

 

13. 

Basic function

14. 

 

 

Extrusion coating method

 

Intermittent coating

Front 3 Unequally spaced Intermittent Coating/Back Automatic Tracking Front and Unequally spaced 3 Section Coating

 

 

 

Continuous coating (including strip coating method)

Infinite length coating

 

15. 

 

 

Baseband operation mode

Single sided intermittent

Operation mode during intermittent front coating

 

 

 

Double sided intermittent

Operation mode during intermittent reverse coating

 

 

 

Continuous coating

Continuous and uninterrupted coating method

 

 

 

Wearing straps

The method of uncoating the empty belt

 

 

 

Rewind

Rewind operation mode during the first test piece inspection

 

16. 

Thickness reduction function

During intermittent coating

Can eliminate thickness at the beginning and end of the coating section

 

17. 

Alarm function

Sound, light, and text alarm

When the device malfunctions, the touch screen prompts the location of the fault and there is an audible and visual alarm

 

18. 

Coating accuracy technical indicators

19. 

Coating section length error

± 0.5mm   

 

20. 

Width error

± 0.5mm   

 

21. 

Positive and negative alignment error

± 0.5mm

 

22. 

Minimum intermittent length

6mm

 

23. 

Minimum coating length for multiple segments

50mm

 

24. 

Single sided coating dry thickness range

40-200μm     

Related to material D50

25. 

Coating surface density error

±1.3(Single piece single sided)

±1.2% (two-sided)

Remove the influence of poor substrate; But the measured value includes the weight of the substrate;

Excluding edge impact areas

Substrate error ≤ 1% (single piece)

26. 

Deviation correction accuracy of winding and unwinding

± 0.5mm

 

27. 

Electrical specifications

28. 

Source

3~380V/50HZThree phase five wire

 

29. 

Total installed power

1200KKW

 

30. 

Oven heater power consumption

22*50Kw=1100KW

Power consumption after constant temperature: less than 660 KW

External electric heating

31. 

Compressed air

≮0.6MPa Clean compressed air;

Gas consumption0.5M3/H

 

32. 

Equipment dimensions and weight

33. 

External dimensions

Length (11 * 5M+12M+1=68M) * Width (3.5M) * Height (4.5M)

 

34. 

Total weight

About 65 tons


IV.Introduction to the Structure of Each Part

 1)、Unwinding mechanism     



2)、Coating machine head structure: (2 sets, 1 set at the entrance of the lower oven, and 1 set at the entrance of the upper oven

Turnover tank, dynamic filter, feeding valve


No.

Project

                   Technical Parameter

     Notes

1. 

Head installation structure

Overall vertical plate installation (thickness 46mm, surface chrome plated) CNC machining.       

 

2. 

Drive connection method

The direct connection method of the motor and reducer makes the drive more stable and reduces the interference of motor vibration on the coating mold and coating roller.

 

3. 

Transmission structure of coating roller and feeding roller

The coating roller and front drive feeding roller are respectively driven by independent servo motors and precision reducers.

Yaskawa Servo, Japan

4. 

Extrusion mold push

The left and right propulsion uses cylinders to provide back pressure respectively; The lateral position of the mold is adjusted by the handwheel screw component to adapt to changes in the position of the baseband.

SMC cylinder

5. 

 

 

 

 

Extrusion mold

1. The mold is designed as a combination of upper and lower half molds, with the upper and lower half molds connected by gaskets;

2. The combination mold can adapt to effective coating of various slurries and thicknesses;

3. The design of the mold cavity ensures the stability of the slurry extrusion;

4. The surface roughness of the mold cavity is ≤ Ra0.2 to ensure smooth flow of the slurry.

5. The effective coating width of the mold is 680mm;

6. The straightness of the mold discharge port is ≤ 2um.

 

 

 

 

 

 

6. 

 

Extrusion mold gasket

Positive electrode: one gasket for each of 0.8mm, 1.0mm, and 1.2mm

Negative electrode: one shim for each 0.6mm, 0.8mm, and 1.0mm

The thickness and size of the gasket can also be customized according to the process requirements of the purchaser

7. 

 

Coating roller (steel roller)

The surface is plated with hard chromium, with a diameter of 265mm; Hollow structure,

Circular runout ≤ 1.5um

Straightness ≤ 2um

Tested with a Japanese Mitsubishi dial gauge

8. 

 

Front drive feeding roller (Steel roller+rubber roller)

Drive roller+pinch roller method

 

9. 

 

Drive roller: diameter Φ 150mm steel roller with hard chromium plating on the surface

Pinch roller: diameter Φ 120mm; Surface covered with EPDM

The pinch roller is driven and closed by a cylinder

10. 

Guide roller

φ120mm   Anodic oxidation of aluminum alloy surface

 

11. 

 

 

Adjustment of gap between mold and coating roller

1. Gap range: 1-2000um;

2. By rotating the screw through a servo motor, the wedge is driven to move, and the mold moves back and forth under the action of the left and right cylinders;

3. By using high-precision displacement sensors to detect the gap size, the left and right gap values are directly displayed on the touch screen, making adjustments faster and more accurate.

 

12. 

Head control screen

Touch screen+button combination operation

The commonly used action is the external button

13. 

 

 

Coating valve and return valve components

1. The valve body is made of SUS304 stainless steel material, and the internal pipeline is designed with streamline to reduce the resistance of the flow channel;

2. The connection between the two valves and the pipeline is a chuck type quick connect method, which is convenient for disassembly and cleaning;

3. The valve core is driven by a servo motor, ensuring quick opening and closing during coating and cutting;

 

14. 

 

 

 

 

 

 

Dynamic filtration feeding system

1. Stainless steel coating tank+servo Screw pump+dynamic filter (Japanese filter element)+pressure detection+liquid level detection;

2. Coating tank: equipped with low-speed stirring (0-30RPM) to prevent slurry settlement; With interlayer insulation function. Equipped with liquid level detection, it can monitor the current residual material quantity at any time to avoid material shortage during coating;

3. Servo Screw pump: the pulsation free Screw pump driven by servo motor can ensure the continuous and stable output of slurry to ensure the stability of coating amount;

4. Dynamic filter: ensures effective filtration of the slurry during transportation without the need to clean the filter screen midway; (Our patented design) The filter element is replaceable during use and has a long lifespan.

5. Pressure detection: Monitoring the pressure during slurry transportation can determine the stability of slurry transportation;

6. Pipeline: All slurry conveying pipelines adopt a chuck quick connect method, which greatly facilitates installation, disassembly, and cleaning.

7. The feeding system has the function of automatically controlling the slurry entering the coating tank according to the set liquid level of the coating tank

 

 

 

 

 

 

Screw pump is driven by servo motor

15. 

Thickness gauge

Second coating outlet configuration, integrated in the coating group

Optional


3)Drying channel (double layer layout design)

 

Industrial Design Reference Drawing for Box Appearance Drawing



No.

        Project

                   Technical Parameter

     Notes

1. 

 

 

Oven structure

1. Independent inner liner design, with adjustable overall height of upper and lower inner liners;

2. The height of the hair dryer can be adjusted separately and can be disassembled.

3. Zones 1-3, 7-11, 10-12, and 16-18 are upward curved structures with a total drop of 260mm;

4. Inner liner: SUS304 stainless steel;

5. Outer liner: SUS 201 stainless steel

6. Negative pressure chamber at the inlet and outlet: effectively separates the hot air in the drying channel from the air convection in the operating room, reducing the odor in the operating room; At the same time, it can enhance the uniformity of the temperature in the first or last section of the oven

High speed box

2. 

Oven length

55 meters (5 meters per section, a total of 11 sections, each section is double layered);

 

3. 

Circulating air duct and exhaust duct

Sandwich insulation design

Inner liner: SUS304 stainless steel

Outer liner: SUS 201 stainless steel

 

4. 

 

 

 

Transmission mode of oven guide roller

1. The main transmission idler structure is located in zones 1-3, 7-10, 10-12, and 16-18;

2. Zones 4-6 and 13-15 are horizontal floating structures without rollers

3. Frequency converter+motor control, roller drive can strictly follow the baseband linear speed.

4. Roll diameter Φ 80mm, anodized on the surface of aluminum alloy;

 

5. 

Heating method

External steam heat exchanger heating, hot air circulation structure

 

6. 

Heating power of single zone oven

50KW/5m/zone (a total of 22 temperature zones);

Selection of other heat exchange methods (electricity, gas, heat transfer oil, etc.)

7. 

 

Temperature control

Each box has completely independent two-stage temperature control:

Level 1: Temperature control for normal operation of the box;

Level 2: Heating package temperature abnormal alarm control. When the heating package exceeds the temperature, an audible and visual alarm will appear, and the main heating power supply will be cut off.

 

8. 

Heating control

After PID calculation of the temperature controller, drive the electric proportional valve to adjust the temperature

 

9. 

Temperature inside the drying tunnel

Room temperature~150 ℃, with a temperature difference of<± 3 ℃ within each temperature zone,

 

10. 

Surface temperature of the box during operation

Outer surface temperature ≤ 50 ℃ (when ambient temperature ≤ 25 ℃)

 

11. 

 

 

Blowing method

1. The upper air duct of the boxes in zones 1-3 and 10-12 adopts a porous diffusion method, while the lower air duct adopts a horizontal blowing method of the air knife;

2. Zones 4-9 and 13-20 are centralized spraying of horizontal wind blades;

3. The upper and lower air ducts of each box share a heating element and a fan, which are separated by valves;

 

12. 

Fan control

1. All circulating fans (22 sets of 4kw) are controlled by frequency converters;

2. The dehumidification fans (8 sets of 4kw) are controlled by frequency converters;

 

13. 

Adjustment of Up and Down Blowing Air Volume for Single Section Box

The upper and lower air flow is independently adjusted through mechanical valves in the upper and lower air chambers; The total air volume is adjusted through a frequency converter.

 

14. 

Moisture exhaust air volume of single box and complete machine

The dehumidification air volume of a single box is adjusted through a mechanical dehumidification valve;

The total exhaust air volume of the entire machine is adjusted through a frequency converter.

 

15. 

Solvent recovery system

Not provided, only assisting with interface installation

 

16. 

NMP solvent concentration alarm(Optional NMP solvent configuration only)

Two sets of NMP concentration detection probes are configured for each upper and lower layer (a total of six sets)

(Optional) Install the detection probe on the circulating pipeline

17. 

 

 

 

Blast circulation air volume

Boxes in zones 1-3 and 10-12, with a single zone air volume of 800-4500 m3/h

Adjust the air valve to control the air volume according to the process (with a scale prompt)

Boxes in zones 4-9 and 13-20, with a single zone air volume of 1500-7000 m3/h

Adjust the upper and lower air valves according to the process to control the air volume

18. 

Make up fresh air and exhaust gas Engine displacement

Each zone 500~3000 /h

Control the air volume according to the process air valve

19. 

Total exhaust air volume

10000~65000 /h

Frequency converter+motor control air volume

20. 

Main insulation

Double layer structure, insulation layer thickness 100mm, Glass wool insulation

 

21. 

Explosion proof pressure relief port

One pressure relief port per section

 

22. 

Filter

Installation of primary filter for main circulation and fresh air inlet

 

23. 

Pressure monitoring

Equipped with three sets of pressure monitoring gauges: upper air inlet chamber, lower air inlet chamber, and inside the oven

 




No.

     Project

                    Technical Parameter

    Notes

1. 

Roller mounting structure

Overall vertical plate installation (thickness 30mm, surface chrome plated) CNC machining.                    

 

2. 

 

Rear Drive Tension Control System

1. Install a floating tension roller in front of the rear drive roller; Floating roller shaft installation angle sensor;

2. The sensor angle value is controlled by PID calculation to control the speed of the rear drive roller.

3. The tension of the floating roller is controlled by an electrical proportional valve, which is stable and digitally adjustable.     

 

3. 

Rear drive roller

Rear driven main roller (rubber roller)+pinch roller (aluminum alloy) mode

Drive roller: diameter Φ 150mm, surface covered with EPDM;

Pinch roller: diameter Φ 120mm, surface anodized hardened.

 

4. 

Process correction

Installation of drying outlet, automatic EPC control, swing ± 15 degrees

Fully automatic deviation correction

Can recognize transparent film


No.

     Project

                    Technical Parameter

    Notes

Roller mounting structure

Overall vertical plate installation (thickness 30mm), manufactured by CNC machining center;

Rotary frame wall panel cast iron (thickness 100mm), produced by CNC machining center;

 

Driving method

The servo motor drives the A/B material shaft to automatically rewind, automatically connect the material roll, and change the roll without stopping the machine;

The rotary frame is of a disc structure, and the motor drives the center to rotate by 1 revolution per minute;

Positioning with rotary encoder and locking with pneumatic brake;

 

 

Winding tension control system

1. Install a floating roller on the winding frame, and control the winding tension with a pneumatic conversion valve and PLC.

2. PTD control, stable tension and digital adjustable.

 

Winding correction

Automatic EPC control, stroke ± 75mm; The accuracy of the correction controller is ≤ ± 0.5mm.

Ultrasonic sensors can recognize transparent films

Material roll support method

The material roll is fixed with a 3-inch inflatable shaft, wound up, and supported by a safety clamp on both sides

 

Reel diameter

Ф 85~ Ф 600mm; Audible and visual alarm prompts for minimum and maximum roll diameter values

 

Maximum bearing capacity of inflatable shaft

750Kg/piece

 

Drum specifications

Length 720mm, inner diameter approximately 76mm (3 inches)

 

Number of winding inflatable shafts

Automatic switching of 2 A/B axes (dual axis winding)

 

Receiving platform

1. 4 cylinders/double rod pressure strip, with a scoring groove in the middle of the pressure strip platform;

2. When the belt is running, the pressure bar automatically bounces up, and when the belt is stopped, the pressure bar automatically falls down.

 

10

Automatic roll changing and cutting method

Tooth shaped cutter quick cutting method, upper material receiving method

 

11

Receiving and pressing roller

Pneumatic pressure roller, pressure adjustable; Make the winding flat and free from slipping

 

 

 

 

6)、Surface density detection system (positive X-ray, negative laser thickness measurement) ------- (Technical requirements can be found in the technical specifications of the thickness gauge)

 

Industrial Design Reference Drawing for Thickness Gauge Appearance Drawing



7)、Control system

Industrial Design Reference Drawing for Control Cabinet Appearance Drawing




No.

    Project

                   Technical Parameter

     Notes

1. 

   Main control system inside the electric control cabinet

Touch screen, PLC and expansion module, servo driver, frequency converter, signal amplifier button, etc

 

2. 

Signal input and drive

Photoelectric, tension, displacement, angle, temperature and other sensors; Electromagnetic valve, cylinder, servo motor, three-phase AC motor, magnetic powder clutch, etc.

 

3. 

Control method

The combination of touch screen and external buttons,

On the touch screen, parameter settings and start stop control of all machine actions can be completed; External buttons have been added to the winding and unwinding racks to facilitate on-site operations.

 

4. 

Fan frequency regulation and temperature setting

The frequency converter and temperature controller both adopt communication control mode, and all fan frequency regulation and temperature setting can be centrally completed on the touch screen, without the need to open the control cabinet for adjustment.

 

5. 

Setting range of coating and intermittent length

Single section coating length 50.0~9999.0mm

Single segment intermittent length 6.0~9999.0mm

Software lockable range

6. 

Fault alarm

When the device malfunctions, the touch screen will prompt corresponding alarm faults

And there is an audible and visual alarm

 

7. 

Counting function

During intermittent coating: count the number of pieces, yield, and total length

During continuous coating: total length

 

8. 

Intermittent head and tail thickness adjustment function

1. By controlling the speed of the coating valve and reflux valve through a program;

2. By controlling the reflux pressure through a program.

 

9. 

Electric control cabinet

Dual electrical cabinet, separate the power cabinet from the low-voltage cabinet to reduce electromagnetic interference; Each electric cabinet is equipped with dust-proof filter screen and axial flow Computer fan.

 

10. 

MES system interface

The system reserves data communication functions and interfaces with the MES system

 

 

       No.

Name

Brand

Quantity

Notes

1. 

Spool

TMAX

2 pieces/set

 

2. 

V-shaped valve core sealing ring

TMAX

10 pieces/set

 

3. 

Mobile vehicle

self-control

1 set/set

Used for oven operation

4. 

Electric heating tube

customization

6 pieces

 

 

 

9Appearance color

    Except for the stainless steel part, the color of the paint part will be provided by your company's color card or 2U according to our standard color.

V.Equipment accuracy

 1Hardware accuracy

No.

Project

Technical parameter

1. 

Die head

Straightness ≤ 2um

2. 

Coating roller (steel roller)

Circular runout ≤ 1.5um, straightness ≤ 2um, smoothness ≤ Rc0.4

3. 

Deviation correction accuracy of winding and unwinding

±0.5mm

 

2、  Coating accuracy

   1Intermittent coating

Project

Mark

Standard: (Continuous coating speed V=33 meters/mi meters/minute), gap of 25 meters/minute

 

 

A (trailing)

≤1mm

(Related to the viscosity of the slurry and the properties of the binder)

B (abnormal head area)

10mm     

C (tail abnormal area)

6mm

D (Edge effects area)

≤5mm

E (length error)/H (blank error)

≤±0.5mm   

F (width error)

±0.5mm

M (width error)

±0.5mm

G1 (head thickness)

-10~+5um    adjustable

G2 (tail thickness)

-10~+5um    adjustable

I (Positive and Negative Alignment Error)

≤±0.5mm  

J Single sided thickness and density

(Remove areas B, C, and D)

Weight error ≤ ± 1.3% (single sided), ≤ ± 1.2% (double sided) (when the dry thickness of single sided coating is not less than 100um, use the surface density measurement method in item 3)

Length range

L1 (film length)

50.09999.0mm

L2 (intermittent length)

209999.0mm

L1/L2 (coating+gap length)

L1 +L2 ≥100mm

  Project

Mark

StandardV=33m/min

1)  Product accuracy for continuous coating

 

D (Edge effects area)

≤2mm-10+5umChange in viscosity of slurry±300cps

F (width error)

±0.2mm

M (width error)

±0.5mm

I (vertical alignment error of front and back sides)

≤±0.5mm

Single sided density error

Weight error≤±1.3%

Double sided density error

Weight error≤±1.2%

2) Measurement method

 

A. Measurement area: 5mm away from the edge and end, and 5mm away from the beginning;

B. Sampler size: Φ 44mm or according to the process requirements of the purchaser;

2Continuous coating


3Surface density measurement method

A. Measuring instrument: precision electronic scale (0.001g)

B. Measurement area: 6mm away from the edge and end, 10mm away from the beginning

C. Sampling method: Take samples on a coating film with a length of 1000mm and a width of 500-600mm, with 50 sampling points per point Φ 44mm (or according to customer requirements) (5 columns horizontally with a center spacing of 50-100mm, 10 rows vertically with a center spacing of 100mm).

D. Calculation standard: Weigh 50 points separately, and then calculate their standard deviation (STDEV) and average value (AVERAGE). The standard deviation/average value is ± 1.3% (for single side), and ≤ ± 1.2% (for double side coating with a dry thickness of not less than 100um, according to the surface density measurement method in item 3), which is considered qualified (except for special points caused by slurry or substrate reasons).



Note: 1. Acceptance shall be conducted based on a conventional model provided by the user, and the acceptance time shall be determined as 4 consecutive hours of use for testing, or a time specified by the user.

2. Suppliers who do not accept other models are required to provide free technical support and services to meet users' needs, but they are not considered as acceptance criteria.

3. The supplier will also propose some performance and testing requirements for the slurry based on industry experience for user reference.

4Acceptance conditions and content

Acceptance conditions:

(1) Positive electrode acceptance continuous coating speed 33m/min;

(2) Solid content of slurry: positive electrode ≥ 65%; Negative electrode ≥ 48%;

(3) Single sided dry thickness: 110-120 μ M (including foil);

Acceptance content:

(1) Appearance requirements for the electrode: no scratches, cracks, drying defects, wrinkles, or bulges.

(2) Other requirements comply with the relevant content of this technical agreement.

5Acceptance materials and usage

(1) Copper and aluminum foil 2000 meters (width and thickness of foil used in normal production)

(2) Slurry: 600KG (total)










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