Service Overview
The lithium ion battery coating machine is a high-precision automatic transfer coating machine designed for battery electrode production, including lithium-ion (LiFePO4, NMC, LCO), supercapacitor, and oil/water-based coating applications. With a 450mm max web width and 4.5-meter drying oven (3×1.5m sections), it ensures uniform coating at speeds of 1–4 m/min, handling viscosities of 1,000–12,000 cP for aqueous and 2,500–10,000 cP for solvent-based slurries.
Machine Structure
The lithium ion battery coating machine consists of:
Unwinding system
Slurry coating system
Drying oven system
Tension control system
Edge position control system
Rewinding system
Electrical control system
Each system works together to achieve continuous and uniform electrode coating during battery manufacturing.
Working Principle
The battery coating machine feeds metal foil from the unwinding unit and applies electrode slurry through a precision coating head. The coated electrode passes through the drying oven where solvents are removed under controlled temperature conditions. After drying, the electrode sheet is collected by the rewinding system for further battery manufacturing processes.
Key features include
Servo-driven tension control
(Panasonic/Ruineng motors) with ±0.5mm EPC correction for precise alignment.
Comma bar coating head
With ±1µm tooling accuracy and EPDM back roller for consistent 50–300 g/m² dry thickness.
Hot-air circulation oven
(RT–140°C, ±2°C accuracy) with SUS304 stainless steel construction and 30kW heating power.
Omron PLC and touchscreen HMI
For automated operation, supporting intermittent/continuous coating modes.
Ideal for EV battery manufacturing, this machine meets hardware tolerances ≤1.5µm (coating roll) and coating edge accuracy ±1mm. Popular search terms: electrode coater, battery coating machine, roll-to-roll coater, lithium battery equipment, and precision coating system.
Main equipment configuration
|
No |
Name |
Brand |
| 1. |
Air switch |
Chint |
| 2. |
PLC controller |
Japan Omron/Huichuan |
| 3. |
Touch screen |
Kunlun pass state |
| 4. |
Intermediate relay |
Schneider/Omron |
| 5. |
Servo motor |
Japan Panasonic/Ruineng (according to the purchase cycle) |
| 6. |
Planetary reducer |
Aibo/Dick Cisco |
| 7. |
Circuit breaker |
Chint |
| 8. |
Ac contactor |
Chint |
| 9. |
Solid-state relay |
Made in China |
| 10. |
Temperature controller |
Omron/Atai |
| 11. |
Automatic correction (closed loop) |
Servo motor drive |
| 12. |
Automatic tension (front tension) |
PID controls the motor speed |
| 13. |
Automatic tension (rear tension) |
PID controls the motor speed |
| 14. |
Optical fiber eye |
Panasonic of Japan |
| 15. |
Pneumatic element |
Jadek |
| 16. |
Rodless cylinder |
Shian |
| 17. |
Deep groove ball bearing |
NSK/SKF |
| 18. |
Air blower |
Stainless steel, multi-wing low noise, Guangzhou |
Basic functions of the equipment
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Fit system |
Lithium iron phosphate, lithium cobalt, lithium manganate, ternary, lithium nickel cobalt manganate and other systems; Oil, water system of positive and negative electrode coating process; Supercapacitor coating process |
|
| 2. |
Run substrate thickness |
Aluminum foil (Al) : 8 ~ 30um Copper foil (Cu) : 6 ~ 30um |
|
| 3. |
Design width of roll surface |
450 mm |
|
| 4. |
Ensure the coating width |
100~350mm-380mm,Max400mm |
|
| 5. |
Equipment mechanical operating speed |
4m/min |
|
| 6. |
Coating speed |
1～2m/min |
Depends on stock and coating thickness |
| 7. |
Suitable for slurry viscosity |
Oily solvent 2500-10000 Cps |
Intermittent coating |
|
Aqueous solvent 1000-6000 Cps |
|||
|
2000~12000 Cps |
Continuous coating |
||
| 8. |
Single side coating dry thickness range |
50-150μm 50~300g/m2 |
Due to material characteristics, it is possible not to meet at the same time |
| 9. |
Minimum intermittent length |
4mm |
|
| 10. |
Minimum coating length for multiple sections |
20mm |
|
| 11. |
Solvent characteristic Suitable solid content |
Oily solvent NMP(s.g=1.033,b.p=204℃) |
For reference only |
|
Aqueous solvent H2O/NMP(s.g=1.000,b.p=100℃) |
For reference only |
||
| 12. |
Minimum intermittent length |
Cathode S.C. 55%±20% |
|
|
Anode S.C. 55%±20%(PVDF system) |
For reference only |
||
| 13. |
Coating method |
Single-layer front and back 2 sections uneven interval intermittent transfer coating/second surface automatic tracking/continuous coating |
|
| 14. |
Substrate running direction |
Forward coating, substrate positive and reverse empty foil operation |
|
| 15. |
Roll guide outside the baking path |
About φ80mm aluminum guide roller, surface hard oxidation |
Finish Rc0.4 |
The structure of each part
1). Winding mechanism:
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Over roller mounting structure |
Monolithic vertical mounting (thickness 30mm) |
|
| 2. |
Tension control system |
PID control motor speed control gravity block position, pressure control tension |
|
| 3. |
Correction mode |
Automatic EPC control, stroke 50mm, deviation correction controller accuracy ±0.5mm |
Ultrasonic detection, can identify the transparent membrane |
| 4. |
Winding method |
The material roll is fixed with 3-inch inflating shaft and supported on one side; |
|
| 5. |
Substrate running direction |
Forward and reverse |
|
| 6. |
Unwinding direction |
Above and below |
|
| 7. |
Unwinding winding diameter |
Ф85~Ф300mm |
|
| 8. |
Maximum bearing capacity of the inflatable shaft |
100Kg/ piece |
|
| 9. |
Drum specification |
Length ≤430mm, inner diameter about 76mm(3 inches) |
|
| 10. |
Number of inflatable shaft strips |
A piece of |
|
| 11. |
Receiving platform |
Double rod press belt, opening slot |
|
| 12. |
Driving mode |
Inverter controls AC motor |
2). Head structure:
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Main drive motor |
Servo motor |
|
| 2. |
Intermittent drive motor |
Servo motor |
|
| 3. |
Scraper construction |
Solid set type double-sided comma scraper, substrate, set 40Cr electroplating |
|
| 4. |
Scraper Angle rotation control |
Move the handle and rotate |
|
| 5. |
Coating roll |
Hard chrome plated surface, diameter Ø128mm; Hollow structure |
|
| 6. |
Back roll |
Diameter Ø128mm, coated with EPDM, roller surface grinding |
|
| 7. |
Tank mixing |
The rodless cylinder moves in a straight line and the speed is adjustable to prevent the slurry from settling |
|
| 8. |
The intermittent height of the scraper is adjusted |
Full servo tool adjustment, control the lift of the tool holder. Lifting range 1~300um |
|
| 9. |
Baffle plate |
Match steel plate + foaming sea surface, coating width can be adjusted |
|
| 10. |
Operation mode |
Touch screen + button operation |
The common action is the external key |
3).Baking
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Dry the bile structure in the body |
Independent interior design, ship type design |
|
| 2. |
Oven length |
3 sections, 1.5 meter each, a total of 4.5 meters |
|
| 3. |
Sheet metal material of drying duct and air duct |
Inner liner SUS304 stainless steel, outer liner SUS 201 stainless steel |
|
| 4. |
Driving mode of oven guide roller |
Passive transmission mode |
|
| 5. |
Temperature control |
Divided into normal operating temperature control, overtemperature monitoring alarm protection control, overtemperature will appear sound and light alarm, and cut off the main heating power supply; |
|
| 6. |
Heating method |
Electric heating, hot air circulation structure |
|
| 7. |
Single oven heating power |
10KW/ knot; 3 sections total 30KW; |
|
| 8. |
Temperature in the baking channel |
Room temperature ~140℃, single section temperature difference < 5℃, each stage independent control |
|
| 9. |
Body surface temperature during operation |
Measured temperature emission ≤ set temperature 50% |
|
| 10. |
Blowing mode |
Upper and lower blow air, lower return air, independent heating body of the air chamber, independent temperature control, independent air volume control |
|
| 11. |
Each section exhaust air volume control |
Independent control via mechanical valve |
|
| 12. |
Heating fan control |
Automatic control |
|
| 13. |
Exhaust fan control |
Automatic control |
|
| 14. |
Heating control |
Solid-state relay |
|
| 15. |
Solvent recovery system |
No, only the installation interface is provided |
|
| 16. |
Total exhaust air volume |
500-1300㎥/H |
The air valve is adjustable |
| 17. |
Exhaust fan distribution |
1 exhaust fan |
|
| 18. |
Main body insulation |
Double-layer structure, insulation layer thickness 80mm, glass wool heat insulation |
4). Traction and winding mechanism:
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Winding tension control system |
Taper tension control, according to the size of the winding diameter, adjust the size of the tension, to prevent receiving large roll uneven. |
|
| 2. |
Winding correction |
Automatic EPC control, travel 50mm |
|
| 3. |
Winding method |
The roll is fixed with a 3-inch inflatable shaft and supported on one side |
|
| 4. |
Substrate running direction |
Forward and reverse |
|
| 5. |
Winding direction |
Above and below |
|
| 6. |
Winding diameter |
Ф85~Ф300mm |
|
| 7. |
Maximum bearing capacity of the inflatable shaft |
100Kg/strip |
|
| 8. |
Drum specification |
Length ≤430mm, inner diameter about 76mm(3 inches) |
|
| 9. |
Number of winding inflatable shafts |
A piece of |
|
| 10. |
Receiving platform |
Single rod press belt, open slot |
|
| 11. |
Driving mode |
Servo motor control |
|
| 12. |
Roller guide mounting structure |
Vertical type |
|
No |
Item |
Technical parameter |
Remark |
| 1. |
Main control system |
Touch screen, PLC, module, servo system |
|
| 2. |
Mode of operation |
Manual, automatic, emergency stop; The machine can be operated before and after |
|
| 3. |
Setting range of coating and intermittent length |
Coating length 20.0 ~ 3200.0mm |
Software can lock the range |
| 4. |
Alarm situation |
Intermittent length 4.0 ~ 300.0mm |
|
| 5. |
Counting function |
When the device fails, the touch screen will display the corresponding fault prompt screen |
|
| 6. |
Intermittent head and tail thickness adjustment method |
Quantity/length of production |
5). Control system:
6). Automatic feeding system:
customer-owned
Coating equipment appearance size and quality:
6500 * 1298 * 1971(L×W×H);3000kg(for reference only)
Equipment accuracy
1. Hardware accuracy
|
No |
Item |
Technical parameter |
Remark |
| 1. |
scraper |
Round runout ≤ 1.5um, straightness ≤ 1.5um |
|
| 2. |
Coating roll |
Round runout ≤ 1.5um, straightness ≤ 1.5um |
|
| 3. |
Back roll |
Circular runout ≤ 15um, straightness ≤ 15um |
|
| 4. |
Deviation correction |
±1mm |
|
| 5. |
Tool setting controls repetition accuracy |
±1um |
|
| 6. |
Temperature controller control accuracy |
≤±2℃ |
2.Coating accuracy
|
Item |
Remark |
Standard (Speed V=1.5 m /min) |
|
|
A (trailing) |
≤1mm (related to slurry viscosity and binder characteristics) |
|
B(Abnormal area of the head) |
10mm |
|
|
C(Tail anomaly area) |
6mm |
|
|
D(Edge effect area) |
≤3mm |
|
|
E(length error) /H(margin error) |
≤±0.5mm ≤±0.7mm |
|
|
F (width error) |
±1mm |
|
|
M(width error) |
±1mm |
|
|
G1 (head thickness) |
-5~+6um |
|
|
G2 (Tail thickness) |
-5~+6um |
|
|
I (reverse alignment error) |
≤±0.7mm ≤±1 mm |
|
|
J Thickness of one side surface density |
Weight error ≤±1.5% Thickness error ≤±1.5um |
|
|
Length range |
(Remove B, C, D area) |
20.0～3200.0mm |
|
L1(Film length) |
4.0～3200.0mm |
|
|
L2 (intermittent length) |
L1 +L2 ≥120mm |
Application Cases
The lithium ion battery coating machine is widely used in:
Electric vehicle battery production
Energy storage battery manufacturing
Consumer electronics battery production
Battery pilot production lines
Laboratory battery development
Suitable for manufacturing lithium-ion battery electrodes requiring high coating accuracy and stable production performance.
Partner Company
Frequently Asked Questions
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What is a lithium ion battery coating machine used for?
+
-
A lithium ion battery coating machine is used to apply electrode slurry onto metal foil during lithium-ion battery manufacturing. It is a key piece of equipment for producing battery electrode sheets.
Which materials can be coated by this machine?
+
-
The machine can coat cathode materials such as LFP, NMC and LCO, as well as anode materials including graphite and silicon-carbon.
What is the function of the drying oven in the coating machine?
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-
The drying oven removes solvents from the coated electrode slurry and helps achieve stable electrode quality.
What factors affect coating quality?
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Coating quality depends on slurry consistency, coating thickness control, foil tension stability and drying temperature uniformity.