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5L Vacuum Planetary Mixer for High Viscosity Battery Slurry
5L Vacuum Planetary Mixer is designed for high-viscosity lithium-ion battery electrode slurry preparation in laboratory and small-scale R&D applications. It enables efficient mixing of cathode and anode materials, including active materials, conductive agents, and binders, under vacuum conditions to ensure uniform dispersion and eliminate air bubbles. The planetary mixing mechanism provides multi-directional movement for improved homogeneity, while adjustable speed and programmable mixing steps allow precise process control. It is widely used for battery formulation development, process optimization, and coating performance evaluation.
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PP-PM5L｜Vacuum Planetary Mixer
Applicable Battery Types
5L Vacuum Planetary Mixer is suitable for laboratory and small-scale R&D of lithium-ion battery electrode slurry. It is designed for high-viscosity cathode and anode materials, including NMC, LFP, LCO, and graphite systems. The equipment is widely used in formulation development, process optimization, and coating performance evaluation under vacuum mixing conditions.
This PP-PM5L vacuum planetary mixer is suitable for:
• Lithium-ion battery electrode slurry pilot production
• Sodium-ion battery material development
• Solid-state battery slurry formulation
• High-viscosity ceramic and functional material processing
• Conductive paste and polymer dispersion
• Laboratory-to-pilot scale-up research
• Energy storage material process optimization
Process Flow:
Raw material weighing → Powder pre-mixing → Addition of binder and solvent → Low-speed wetting → High-speed dispersion → Vacuum degassing → Homogenization → Final slurry discharge → Filtration and storage for coating use.
Key Features
• Pilot-Scale Vacuum Mixing System
Designed for battery slurry scale-up from laboratory to pilot production, ensuring process stability.
• High Viscosity Material Processing
Optimized for electrode paste and high solid content slurry systems up to 1.2 million cP.
• Vacuum Degassing Technology
Removes trapped air during mixing, improving electrode density and coating quality.
• Planetary + Dispersion Hybrid System
Combines low-speed kneading and high-speed shear for superior slurry uniformity and dispersion efficiency.
• Electric Lifting & Easy Operation
Enhances usability in pilot production environments and R&D laboratories.
Key Technical Advantages
• No Dead Zone Mixing System
The scraper system eliminates back-side dead zones and improves full material circulation. It reduces manual cleaning effort and enhances mixing uniformity. (Scraper is detachable for high-viscosity processes)
• Easy Cleaning Structure
The optimized gap design between planetary gearbox and vessel improves accessibility and cleaning efficiency, reducing residue accumulation.
• High Rigidity Structure
The mechanical rigidity is approximately 2× higher than conventional mixers, enabling stable operation under ultra-high viscosity conditions.
• Dynamic Temperature Monitoring
Temperature sensing is integrated through the low-speed shaft, improving measurement accuracy and extending sensor service life.
• Variable Cross-section Kneading Technology
Advanced spiral geometry enables continuous kneading of high-viscosity materials, improving mixing efficiency by 30%–40%.
• High-efficiency Dispersion System
Single dispersion disc achieves 137% efficiency compared to traditional dual-disc 5L systems, significantly reducing material splashing and improving dispersion quality.
Technical Specifications
Automatic Battery Stacking Machine Basic Parameters
- Dimensions: 1225mm (L) × 560mm (D) × 1525mm (H) (subject to final design)
- Power supply: 380V 50HZ
- Total machine weight: 600kg
- Total weight to load-bearing area ratio：≤1500kg/m²
- Color: Supplier’s standard color sample (International Warm Gray 1C)
Technical Specifications
1) Lower Barrel Unit
| Parameter | Specification |
| Design volume | 7.85 L |
| Working volume | 2.7–5 L |
| Inner diameter | Φ250mm |
| Inner depth | 160mm |
| Material | 304 stainless steel (material contact parts) |
| Jacket type | Single-layer jacket (barrel + bottom) for heating/cooling |
| Jacket port | G3/8″ quick connector, ≤0.4 MPa |
| Cooling system | Provided by customer |
| Cooling condition | Inlet ≤8°C, flow rate >3.5 L/min |
| Discharge valve | 1″ bottom piston valve |
| Operating temperature | -10 to +120°C |
| Movement | Mobile with casters |
2) Mixing System
| Parameter | Specification |
| Working frequency | 5–50 Hz |
| Mixing power | 1.5 kW |
| Mixing speed | 0–122 rpm |
| Planetary speed | 0–60 rpm |
| Blade diameter | 124 mm |
| Blade type | Variable cross-section spiral (90° helix) |
| Material | 304 stainless steel |
| Blade quantity | 2 pcs |
| Blade-to-blade clearance | 4 ±1 mm |
| Blade-to-wall clearance | 4 +1 mm |
| Blade-to-bottom clearance | 4 +1 mm |
3) Dispersion System
| Parameter | Specification |
| Working frequency | 5–50 Hz |
| Dispersion power | 1.5 kW |
| Speed range | 0–6000 rpm |
| Disc diameter | 50 mm |
| Disc type | Serrated |
| Material | 304 stainless steel |
| Linear speed | 19.6 m/s |
| Quantity | 1 pc |
| Shaft | 1 pc |
4) Scraper System
| Parameter | Specification |
| Support material | 304 stainless steel |
| Scraper material | PTFE (Teflon) |
| Rotation | Synchronized with planetary system |
| Structure | Detachable design |
5) Lifting Base System
| Parameter | Specification |
| Material | High-rigidity structural carbon steel |
| Lifting mode | Electric |
| Guide system | High-precision linear guide |
| Stroke | ≤290 mm |
6) Upper Vessel System
| Parameter | Specification |
| Material | 304 stainless steel |
| Powder inlet | DN50 quick connector with sight glass |
| Liquid inlet | ISO 1/2″ quick connector |
| Lighting port | DN50 |
| Vacuum port | G1/2″ |
| Nitrogen port | G1/2″ |
| Exhaust | Shared with vacuum port |
| Vacuum gauge port | M14×1.5 |
7) Control System
| Parameter | Specification |
| Electrical cabinet | For VFD and low-voltage components |
| Control panel | Buttons / touch screen / indicators |
| Power supply | AC 3×380V ±5%, 50Hz |
| Control mode | Electrical control |
| Drive system | Inverter-based speed control |
| Cooling | Air-cooled |
| Operation interface | Touch screen |
| Temperature display | Material temperature |
| Emergency stop | 1 pc |
| Alarm system | Over-temperature alarm & shutdown |
| Speed display | Touch screen |
| Power indicator | 1 pc |
| Timer | Shared control for mixing and dispersion |
FAQ
Q1: What is a vacuum planetary mixer used for in battery production?
A vacuum planetary mixer is used for preparing high-viscosity electrode slurries in lithium-ion battery manufacturing. It ensures uniform dispersion of active materials, binders, and conductive agents while removing air bubbles under vacuum conditions.
Q2: What types of battery slurries can this 5L mixer handle?
It is suitable for cathode and anode slurries used in lithium-ion batteries, including NMC, LFP, LCO, and graphite-based formulations with high solid content and viscosity.
Q3: Why is vacuum mixing important for battery slurry preparation?
Vacuum mixing helps eliminate trapped air bubbles, improves slurry density, and ensures stable coating performance, which directly affects electrode quality and battery consistency.
Q4: Can this equipment be used for R&D and pilot production?
Yes, the 5L capacity is ideal for laboratory R&D, formulation development, and small-scale pilot testing of battery electrode slurries.
Q5: What is the advantage of planetary mixing structure?
The planetary motion ensures multi-directional mixing, which improves dispersion efficiency and achieves more uniform slurry compared to conventional mixers.
Q6: Can the mixing process be customized?
Yes, mixing speed, time, vacuum level, and multi-stage mixing programs can be customized based on slurry properties and process requirements.
Q7: Is temperature control available during mixing?
Optional heating or cooling systems can be integrated to control slurry temperature and optimize viscosity during mixing.
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