WHAT IS A LAB-SCALE COIN CELL BATTERY LINE?

The prismatic battery cell manufacturing line consists of three main sections:

Electrode Preparation → Cell Assembly → Formation & Grading

The following table outlines the key process differences between LFP (Lithium Iron Phosphate) and Sodium-ion battery manufacturing:

The core objective of this stage is to combine active materials with the substrate through a series of precision processes, producing positive and negative electrode sheets that meet strict specifications for thickness, density, and composition. This foundational stage directly determines the initial performance and consistency of the battery cells.

1.Slurry Preparation

Mix active materials, conductive agents, and binders according to precise formulas. Add solvents for high-speed dispersion to form a uniform and stable slurry.

2.Coating

Apply the slurry evenly and quantitatively onto both sides of aluminum foil (cathode) or copper foil (anode) substrates, ensuring consistent surface density.

3.Electrode Drying

Rapidly evaporate organic solvents from the slurry to solidify the coating on the current collector surface, ensuring complete electrode dryness.

4.Calendering

Mechanically compact dry electrode sheets to effectively increase the compaction density of active materials, reduce porosity, and improve battery energy density.

5.Slitting

Cut continuous electrode sheets to the designed dimensions in preparation for cell assembly.

At this stage, prepared electrode sheets are assembled into battery cells and filled with electrolyte to form sealed units. This is the core manufacturing process, with extremely high requirements for equipment precision and process control. Any deviation may directly affect battery energy density, cycle life, and safety.

6.Stacking

Stack and combine positive and negative electrode plates with the separator according to strict process parameters to form a bare cell.

7.Tab Welding

Use ultrasonic technology to precisely fuse the internal terminals of the battery cell with external adapters.

8.Shell Insertion

Carefully insert the bare battery cells into customized aluminum alloy casings.

9.Cover Welding

Perform laser welding to create a circumferential sealing weld between the battery cover plate and the aluminum shell.

10.Electrolyte Filling

Inject precisely measured electrolyte into the enclosed battery case in a strictly controlled dust-free and anhydrous environment (dew point below -40°C).

11.Final Sealing

Complete the sealing process by mechanically stamping and closing the injection port.

At this stage, battery cells undergo activation, performance testing, and grading screening. A series of standardized processes establish a stable electrochemical interface and ensure strict classification based on performance indicators—the core process for guaranteeing final battery quality and safety.

12.SEI Formation

Perform initial low-current charging to construct a dense and stable SEI film on the negative electrode surface.

13.Aging

Allow the SEI film structure to naturally mature and stabilize in a constant- temperature environment for a specified period.

14.Cell Capacity Grading

Execute standard charge-discharge cycle testing to accurately quantify core performance parameters, including actual capacity and DC internal resistance.

15.Cell Sorting

Strictly classify and screen battery cells based on capacity test data to ensure consistent performance in the final battery pack.

Planetary Vacuum Mixer

High Vacuum Mixing

Optional Volume: 5L/10L/30L/60L/100L etc.

Applicable Viscosity Range: ≤1,200,000cP

Customization Avaliable

The planetary vacuum mixer is designed for mixing and dispersing powder and liquid raw materials for various battery types, producing a uniformly mixed battery slurry. It is particularly well-suited for high-viscosity processes, with a working viscosity range up to 1,200,000 cP. Customization is available to meet specific production requirements.

SN	Equipment Type	Volume	Applicable Scenarios	Cell Spec.	Reference
1	Double Planetary Vacuum Mixer (Lab)	2L	Laboratory R&D, small-scale formula debugging	10 Ah
2	Double Planetary Vacuum Mixer (Lab)	5L	Preliminary lab trial and pilot testing	10–20 Ah
3	Double Planetary Vacuum Mixer (Lab)	10L	Pilot production line, small-batch manufacturing	20–50 Ah
4	Double Planetary Vacuum Mixer (Pilot)	30L	Pilot production line, small‑batch manufacturing	50–100 Ah
5	Double Planetary Vacuum Mixer (Pilot)	60L	Pilot production line, small-batch manufacturing	100–200 Ah
6	Double Planetary Vacuum Mixer (Pilot)	100L	High-viscosity slurry dispersion, silicon-based anode slurry preparation	200–500 Ah

Transfer Coating Machine

Continuous or Intermittent Coating

Effective Coating Width: 300/400/500/600mm ectc.

Coating Speed: Customization

Heating Oven Length: 1m/3m/6m/12m/18m ect.

Customization Avaliable

The transfer coating machine features easily adjustable coating thickness with high accuracy and user-friendly operation. It supports both continuous and intermittent coating modes. Customization is available for specific production needs.

• Coating modes: Continuous or intermittent

• Effective coating width: 300 / 400 / 500 / 600 mm (customizable)

• Coating speed: Customizable

• Heating oven length: 1m / 3m / 6m / 12m / 18m (customizable)

Item	Lab Coater	Pilot Production Coater
Machine Type	Transfer / Gap Coating Machine	Transfer / Gap Coating Machine
Target Application	R&D for small‑sized prismatic cells	Large‑sized prismatic cells & pilot projects
Production Capacity	Low throughput, laboratory use	Medium throughput, pilot line production
Coating Width	50–300 mm	Customizable
Coating Length	200–800 mm	Customizable
Coating Mode	Continuous / Intermittent	Continuous / Intermittent
Oven Length	1m / 3m / 6m / 8m / 12m, etc.	18m / 24m / 30m, etc.
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Continuous Calender (Roll-to-Roll)

Roller Size: D210*330mm, Customizable

Rolling Speed: 0.5-5m/min

Rolling Temperature: 130℃ (Standard)

Can Customized into RT-150℃, Precision: ±2℃

The hydraulic balanced electric roller delivers high-precision rolling of battery electrodes. The equipment ensures excellent transverse and longitudinal uniformity, providing superior rolling performance for both laboratory and production environments.

• Roller size: D210×330 mm (customizable)

• Rolling speed: 0.8–5 m/min(customizable)

• Rolling temperature: Standard 130°C (customizable range: RT–150°C, precision ±2°C)

Item	Small Roll‑to‑Roll Calender	Automatic Roll‑to‑Roll Calender
Roll Diameter	200–330 mm	Customizable
Effective Rolling Width	300–600 mm	Customizable
Heating System	Heated / Non‑heated optional	Heated / Non‑heated optional
Unwinding & Rewinding	Optional	Optional
Application Scope	Laboratory research & small‑batch trial production	Pilot production & mass production
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Die Cutting Machine

Die Cutting Size: Customizable

Automatic & High Efficiency

The die cutting machine is primarily used for precision cutting of battery electrode sheets for stacking pouch cells and prismatic batteries. It is an essential tool in the production line for producing specifically shaped cathodes and anodes.

• Die cutting size: Customized according to cell dimensions

• Automatic & high efficiency

Item	Semi‑Automatic Die Cutter	Fully Automatic Die Cutter
Cutting Method	Mechanical die cutting / Laser cutting	Mechanical die cutting / Laser cutting
Effective Cutting Width	150–450 mm (Customizable)	150–600 mm (Customizable)
Cutting Speed	5 PPM	≥250 PPM
Core Features	Pneumatic/servo drive, single‑station operation, mold stamping	Servo feeding, web guiding, CCD visual inspection, auto‑unloading, low burr
Application Scenarios	R&D trial production and small‑batch manufacturing	Pilot production and large‑scale mass production
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Stacking Machine

Stacking Size: Customizable

Automatic & High Efficiency

Working Station: Single or Double Working Station

Based on cell design and manufacturing processes, electrodes are cut or slit into required dimensions for stacking. These machines ensure accurate electrode size control, clean edges, and high consistency, providing reliable preparation for subsequent cell assembly steps.

• Stacking size: Customized according to cell dimensions

• Working stations: Single or double working station options

Item	Winding Process	Stacking Process (Z stack)
Forming Principle	Electrodes and separator are continuously spirally wound into a core	Electrodes are die‑cut into pieces, then stacked alternately layer by layer
Key Processes	Rolling → Slitting (no die‑cutting required)	Rolling → Slitting → Die‑cutting + Visual inspection
Internal Structure	Hollow center, rounded corners, concentrated stress	Compact interior, no hollow space, evenly distributed stress
Current Conduction	Single tab, long current path, higher internal resistance	Multi‑tab design, short current path, lower internal resistance
Heat Dissipation	Heat accumulates at center, large temperature difference	Uniform heat dissipation between layers, excellent temperature control
Production Efficiency	Continuous operation, high speed, high output	Piece‑by‑piece stacking, lower cycle rate
Equipment Investment	Winding machines & tab welders, low investment	Die‑cutters, CCD inspection, stackers & ultrasonic welders, high investment
Yield Rate	Mature technology, yield >98%	Multiple procedures; yield: 95%–97%
Energy Density	Standard level	5%–10% higher than winding
Cycle Life	Standard service life	20%–30% longer cycle life
Applications	Prismatic cells ≤20Ah: consumer electronics, power tools	Prismatic cells ≥20Ah: EVs, energy storage, fast charging
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Laser Welding Machine

Customized Welding Stroke

Welding Material: Aluminum/Nickel/Copper etc

Welding Power: Optional

1000W/1500W/2000W/3000W/4000W/6000W

The laser welding machine is the core precision equipment for manufacturing prismatic batteries, directly determining battery safety, consistency, yield, and service life. It is an indispensable standard for mass production of prismatic batteries.

• Customized welding stroke

• Welding materials: Aluminum / Nickel / Copper, etc.

• Welding power: 1000W / 1500W / 2000W / 3000W / 4000W / 6000W optional

Welding Scenario	Can & Top Cover Hermetic Welding	Tab / Transition Tab Welding	Post‑process Welding
Typical Processes	Top cover to aluminum shell; safety vent & injection hole	Multi‑tab welding for laminated cells	Sealing nail re‑welding, busbar welding for modules
Process Requirements	Air tightness: ≤1×10⁻⁹ Pa·m³/s; No spatter or cold solder joint	Uniform penetration, no internal spatter, stable internal resistance	Low heat input, no secondary damage to cells
Recommended Equipment	Continuous fiber laser, 1500–6000W	Galvanometer welder, 1000–3000W, optimized for Cu‑Al	Pulsed / Continuous laser, 500–3000W
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Formation & Aging Tester

Energy-Feedback Optional

Current Range: 10A/20A/30A/60A/100A etc.

Aging Channel: 8-100 Channels Optional

The formation and aging equipment is the core process equipment in the later stage of battery manufacturing, used for cell activation, performance screening, and consistency matching after electrolyte filling and sealing. It directly determines battery capacity, cycle life, and safety.

• Energy-feedback optional

• Current range: 10A / 20A / 30A / 60A / 100A, etc.

• Aging channels: 8–100 channels optional

Channels	Charge & Discharge Parameters	Structure Type	Reference
8‑channel	Voltage: 0–5V | Current: 20mA–10A (High‑current customizable)	Horizontal / Vertical optional
16‑channel	Voltage: 0–5V | Current: 20mA–20A (High‑current customizable)	Horizontal / Vertical optional
32‑channel	Voltage: 0–5V | Current: 1A–30A (High‑current customizable)	Horizontal / Vertical optional
64‑channel	Voltage: 0–5V | Current: 2A–60A (High‑current customizable)	Horizontal / Vertical optional
128‑channel	Voltage: 0–5V | Current: 2A‑60A (High‑current customizable)	Horizontal / Vertical optional
256‑channel	Voltage: 0–5V | Current: 2A–100A (High‑current customizable)	Horizontal / Vertical optional

Grading Machine

Energy-Feedback Optional

Current Range: 10A/20A/30A/60A/100A/200A/300A etc.

Testing channels: 8–512 Channels Optional

The battery capacity grading tester performs precise charging and discharging, capacity calibration, performance sorting, and aging screening of battery cells after formation. It ensures consistency in factory cell capacity, internal resistance, and voltage—a critical quality control step before PACK assembly.

• Energy-feedback optional

• Current range: 10A / 20A / 30A / 60A / 100A / 200A / 300A, etc.

• Testing channels: 8–512 channels optional

Our turnkey solution is customized based on the following key parameters:

Based on the above project parameters, we will formulate a complete turnkey solution tailored to your specific requirements.