Roll to Roll Automatic Electrode Slitting Machine for Battery Electrode Production

Roll to Roll Automatic Electrode Slitting Machine for Battery Electrode Production

1. Equipment Overview

1.1 Equipment Functions

No.	Item	Technical Specifications	Remarks
1	Applicable Materials	Electrode sheets after coating and calendaring: LFP, LCO, LMO, NCM, NCA, LTO, graphite, etc.
2	Substrate Specifications	Aluminum foil (AL): Thickness 9–30μm, Width 50–500mm, Max. roll diameter: 400mm
		Copper foil (Cu): Thickness 6–30μm, Width 50–500mm, Max. roll diameter: 400mm
3	Roller Width Design	650mm
4	Guaranteed Slitting Width	30–500mm
5	Mechanical Running Speed	50m/min
6	Slitting Speed	1–40m/min	Depends on slitting quality
7	Electrode Thickness Range	70–250μm
8	Slitting Method	1. Combined rotary blade slitting; 2. Nishimura-type cutter structure; 3. Spec to be defined
9	Rewinding Method	Dual-shaft differential shaft staggered rewinding

1.2 Working Principle

Coiled positive and negative electrode sheets, post-calendaring, are loaded into the unwinding system. Driven by traction, the electrode sheet is fed into a set of blades arranged to meet process requirements for slitting. The slit sheets are rewound by upper and lower rewinding systems, with edge trims collected through a dedicated trim collection system.  

The machine is outfitted with automatic web guiding, tension control, and dust extraction systems (including dust extraction in the blade area). These features ensure smooth material feeding, stable slitting performance, and adherence to specifications for burrs and straightness.

1.3 Operating Workflow

Load the material onto the unwinding shaft using a transfer trolley, then route it through the splicing table, traction rollers, slitting blade group, and roller group, before guiding it to the upper and lower differential shafts. After that, handle trim rewinding, set the required tension, switch the web guiding system to automatic mode, and press the start button—the machine will then automatically perform slitting and rewinding.

 

1.4 Overall Structure

Approximate Dimensions:

· Main Machine: 1800mm (L) × 2300mm (W) × 1900mm (H)

· Dust Collector: 800mm (L) × 800mm (W) × 1400mm (H)

· Blade Cart: 1200mm (L) × 400mm (W) × 1000mm (H)

1.5 Major Component Structure

1.5.1 Unwinding System

No.	Item	Description
1	Unwinder	Single-shaft center unwinding; 3" core; Max. roll dia. 400mm; width ≤ 500mm
2	Splicing Table	Dual pneumatic pressing rod type
3	Web Guiding	Ultrasonic servo-guided; stroke ±40mm; accuracy ±0.2mm
4	Tension System	Fully automatic torque closed-loop control; adjustable 0–250N

 

1.5.2 Slitting Mechanism

No.	Item	Description
1	Mechanical Speed	Max. 50m/min
2	Slitting Speed	0–40m/min
3	Slitting Method	Combined rotary blades; Nishimura-type structure; specs to be finalized
4	Blades	Material: tungsten alloy; Upper blade: Φ100×Φ65×0.7mm (35°), Lower blade: Φ100×Φ65×2.0mm (90°)
		Blade life: Positive electrode: 150–200k meters, Negative electrode: 250–300k meters; reusable 10x
5	Blade Adjustment	Adjustable blade clearance; engagement via screw threads
6	Blade Drive	Servo motor; adjustable blade speed percentage via control panel
7	Cleaning Device	Direct-discharge brush at lower blade
8	Slitting Width Accuracy	≤±0.1mm
9	Electrode Snake Error	≤±0.3mm/1000mm
10	Metal Burrs	Longitudinal: <6μm; Transverse: <10μm

 

1.5.3 Rewinding System

No.	Item	Description
1	Rewind Shafts	Dual-axis staggered rewinding; slip-shaft; 3" core; Max. dia. 400mm; single loop 40mm
2	Rewinding Accuracy	≤±0.4mm
3	Pressure Rollers	Gravity rollers (75mm); pneumatic open/close; other sizes optional
4	Dust Collection	Dual brush cleaning (upper/lower); stepper-driven brushes; integrated ducting; blade zone extraction
5	Edge Trim Unit	Dual servo-driven systems; torque adjustable; trim >5mm; collected into bins

 

1.5.4 Control System

No.	Item	Description
1	Main Control Unit	1. Rotatable centralized control panel; 2. OMRON main controller with Ethernet; 3. All key components are imported brands.
2	Electrical Cabinet Layout	1. Partitioned layout management; 2. Separate zones for mechanical, pneumatic, and electrical; 3. Electrical panel isolated from dust for ease of maintenance.
3	Alarm / Maintenance	1. Equipped with tri-color warning light and buzzer; 2. Visual and audible alarms for machine start-up/abnormalities; 3. Control interface includes IO check table.
4	Electrical Specs	1. 480V / 60Hz, 3-phase (US Standard); 2. Air consumption: 13 L/h; 3. Total power: approx. 6 kW
5	Machine Uptime	≥99% (web breakage rate <1%)

 

1.6 Main Components

No.	Name	Brand	Origin
1	PLC Unit	Omron	Japan
2	Touch Screen	Panel Master	China
3	Tension Control System	Kruida	China
4	Web Guiding System	Kruida	China
5	Inverter	Mitsubishi	Japan
6	Low Voltage Circuitry	Schneider	France
7	Inverter Motor	CP	China
8	Servo Motor	Mitsubishi	Japan
9	Stepper Motor	Yankon	China
10	Pneumatic Components	Airtac	Taiwan, China
11	Electro-Pneumatic Valve	SMC	Japan
12	Proximity Switch	DCF	China
13	Linear Guide	PMI	Taiwan, China
14	Bearings	NSK / Local	Japan / China
15	Planetary Gearbox	Dexco	China
16	Coupling	GZD	China
17	Differential Shaft	Custom-made	China
18	Blades	Shengong / Oulin	China

Included Accessories (Per Unit)

No.	Name	Model	Qty	Unit	Remarks
1	Hydraulic Blade Cart	FT500 Special	1	set
2	Blade Assembly	FT500 Special	1	set
3	Hydraulic Lift Cart	FT500 Special	1	set
4	Pressure Roller Assembly	70mm	6	sets	Others optional
5	Upper Blades	Φ100×Φ65×0.7mm	10	pcs	Others optional
6	Lower Blades	Φ100×Φ65×2.0mm	10	pcs	Others optional
7	Blade Spacers	19mm	10	pcs	Others optional
8	Spacer Set	TBD	1	set	Others optional
9	Hook Spanner	C32	1	pc	For blade replacement
10	V-Type Blade Base	—	2	pcs	For blade replacement
11	Dust Collector	WHXC-2200	1	set
12	Standard Tool Kit	Hex keys, screwdrivers	1	set
13	User Manual	—	1	copy
14	Accessory Manuals	—	4	copies