Description

Service Overview

The Dry Electrode Coating Machine is used for solvent-free electrode production of lithium-ion and solid-state batteries. Based on dry coating technology and precision calendering, the system produces uniform dry powder electrode layers with thickness ranges from 40–300μm and thickness control accuracy of approximately ±1μm.

For Solvent Free Battery Manufacturing, the machine removes the need for traditional solvent-based coating processes and reduces solvent consumption during electrode production. It supports roll-to-roll operation with adjustable speeds up to 80m/min and is compatible with copper foil, aluminum foil, and electrode materials such as LFP and NCM.

The equipment features a compact structure and modular design, making it suitable for laboratory research, pilot-line verification, and battery process development. CE and ISO-certified components are applied to ensure reliable operation during long-term testing and production trials.

This dry electrode coating system is used in the development and production of EV batteries, energy storage batteries, and advanced lithium battery technologies, providing manufacturers with a practical solution for solvent-free electrode processing.

The machine is equipped with

The electrode coating machine is equipped with a servo-driven tension control system powered by Panasonic/Ruineng motors. The system maintains stable foil movement and provides ±0.5mm EPC edge correction to improve electrode alignment during the coating process.

A precision comma bar coating head with ±1μm machining accuracy is used together with an EPDM back roller to achieve uniform slurry coating. The machine supports coating weights from 50–300g/m², making it suitable for different lithium battery electrode materials.

The drying section adopts a hot-air circulation oven with a working temperature range of RT to 140°C. Built with SUS304 stainless steel and equipped with 30kW heating power, the oven provides consistent drying conditions for continuous electrode coating.

The control system uses an Omron PLC and touchscreen HMI, allowing operators to set coating parameters and switch between intermittent and continuous coating modes according to production requirements.

With roll tolerance of ≤1.5μm and coating edge accuracy within ±1mm, this electrode coating machine is suitable for lithium battery manufacturing, EV battery production, energy storage applications, and pilot-scale electrode development.

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	Intermittent coating
		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
11.	Solvent characteristic Suitable solid content	Aqueous solvent H2O/NMP(s.g=1.000,b.p=100℃)	For reference only
12.	Minimum intermittent length	Cathode S.C. 55%±20%
12.	Minimum intermittent length	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

Lithium Battery Production Line FAQs

Here you can find answers to common questions about our lithium battery manufacturing equipment, including production process, line configuration, capacity planning, customization, installation, and technical support.

What is a battery tab welding machine?

A battery tab welding machine is a specialized system that joins electrode tabs (thin metal extensions from the current collector) to the cell's terminal structure or busbars, creating a reliable electrical connection with low contact resistance. The most common technologies used are ultrasonic welding, which uses high-frequency vibrations to generate frictional heat and create a solid-state bond without melting the base materials, and laser welding, which offers high precision and speed for robust, hermetic joints. These machines are essential in battery assembly for cylindrical, prismatic, and pouch cells, as weld quality directly affects internal resistance, heat generation, and long-term reliability. Key performance requirements include consistent weld strength, minimal particle generation (to prevent contamination), and precise alignment to avoid damaging the sensitive electrode layers.

What batteries use tab welding technology?

Ultrasonic welding

Can electrode specifications be customized?

Yes

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