Scale your sodium-ion battery technology with TOBGROUP’s sodium-ion battery pilot line expertise. Comprehensive pilot production solutions with technical guidance.
TOBGROUP is dedicated to advancing the industrialization of sodium-ion batteries. We offer a full-stack sodium-ion battery pilot line solution tailored for three major technical routes: layered oxides, polyanionic compounds, and Prussian blue analogs. This solution supports low-cost energy storage, high-rate power applications, and wide-temperature-range scenarios, bridging the gap from lab-scale formulations to commercial mass production.
● Scalable Capacity: 600 – 3,500 cells/day (modular expansion for material validation, customer sampling, and small-batch delivery)
● Compatibility:
(1) Cell Thickness: 3 – 15 mm (compatible with cylindrical/prismatic/pouch cells)
(2) Electrode Web Width: 200 – 650 mm (supports high-tap-density phosphate anodes)
● Core Process Coverage:
(1) Continuous preparation of low-viscosity Na-ion-specific slurry
(2) Precision electrolyte filling system resistant to crystallization
(3) High-pressure electrode calendering (>3.2 g/cm³)
(4) Na-ion-compatible sealing (anti-corrosion Al pouch/Al casing)
(5) Low-pressure formation process
(6) OCV-SOC calibration and grading for Na-ion batteries
TOBGROUP Sodium-ion Battery Polot Line Standard Configuration with Full Customization Support
|
Parameter |
Standard Specification |
Custom Capability |
|
Cell Type |
Prismatic Al case/Pouch |
Cylindrical/Blade |
|
Energy Density |
120-160 Wh/kg |
180 Wh/kg (solid-state Na-ion) |
|
Filling Accuracy |
±0.5 g/Ah |
±0.2 g/Ah |
|
Moisture Control |
≤20 ppm (filling environment) |
≤10 ppm (full workshop) |
|
Voltage Detection |
1.5-4.2V (Na-ion specific) |
0.01 mV resolution |
|
Safety Testing |
Overcharge/nail/thermal (Na-ion standards) |
ARC adiabatic calorimetry |
● Na-Ion-Specific Process Chain Design
(1) Slurry System: Alkali-resistant solvent pipelines; anti-sedimentation mixing (adapted for Prussian blue’s settling tendencies)
(2) Filling Unit: Constant-temperature dry filling (suppresses NaPF₆ hydrolysis); accuracy: ±0.5%
(3) Formation Protocol: 0.02C ultra-low-pressure activation (improves initial efficiency by 5–8%)
● Cost Control Engine
(1) Al foil current collector compatibility (no Cu foil required for anodes), reducing material cost by 30%+
(2) Optional dry electrode module (reduces solvent use and energy consumption by 40%)
● Data Closed-Loop System
(1) Na-ion MES database: Tracks parameters related to Na dendrite growth (temperature/current step/SEI film impedance)
(2) Failure analysis module: Automatically correlates cycle decay with process fluctuations (e.g., moisture residue >50 ppm warning)
● Seamless Mass Production Transition
(1) Equipment interface readiness: Compatible with mass production-wide calendering (800mm+) and high-speed stacking (0.3s/piece)
(2) Process package output: Provides guidelines for Na-ion to Li-ion line conversion (equipment modification list/parameter migration model)
Full-cycle services from lab planning to data output.
|
Phase |
TOB Deliverables |
|
Needs Assessment |
Na-ion system selection (layered/polyanionic/Prussian blue); target cost (￥/kWh); rate/low-temp performance requirements |
|
Line Design |
Anti-corrosion workshop layout (humidity ≤15% RH); integrated inert atmosphere glovebox; waste sodium treatment channel |
|
Equipment Customization |
Na-ion-specific equipment package: ▪ Prussian blue slurry vacuum disperser ▪ Na-ion electrolyte deoxygenation/filling system ▪ Anti-dendrite formation cabinet (pulse charging module) |
|
Process Handover |
Na-ion-specific SOPs: ▪ Na metal residue control standards ▪ Aqueous binder processing window ▪ Ultra-dry filling process |
Core enablers of technological implementation
Actionable insights from planning to execution
Key differences in three areas:
● Materials: Al foil anode current collector; anti-sedimentation slurry process (especially for Prussian blue)
● Filling: Electrolyte (NaPF₆) prone to hydrolysis; requires ≤20 ppm ultra-dry environment
● Formation: Low initial efficiency (typically 60–80%); requires 0.02C ultra-low-pressure activation
Custom solutions:
● Prussian blue: Vacuum dispersion + nano-silica suspension aid
● Polyanionic: High-shear dispersion + thixotropic agent
● Layered oxides: Low solid-content gradient mixing
● NaPF₆ electrolyte decomposes in moisture, generating HF, which:
✓ Corrodes Al current collectors ✓ Destroys SEI film ✓ Causes gas generation and swelling
● TOB solution: Dual-stage molecular sieve dry room (dew point ≤-45°C) + local glovebox (≤5% RH)
Modular design enables quick switching:
● Layered oxides: Standard coating/calendering
● Prussian blue: Vacuum disperser + anti-settlement pipelines
● Polyanionic: Optional dry electrode module (avoids water sensitivity)
Supports three solid-state routes:
● Sulfide: Glovebox + hot press (≥50 MPa)
● Oxide: Sputtering/electrolyte sheet laminator
● Polymer: Melt extrusion-thermal integration equipment
Vs. Li-ion pilot line:
● Materials: Al foil replaces Cu foil for anodes (saves ￥8/m²)
● Equipment: 40% shorter formation time (higher Na-ion diffusion coefficient)
● Energy: Lower dry room humidity requirement (Li-ion needs ≤10% RH)
TOBGROUP delivered a 3000F 60138 supercapacitor pilot line with full equipment, materials, and on-site commissioning support.
TOBGROUP designed a Na-ion battery lab line producing 18650S, 32138S, 32140S cells for advanced research and development.
TOBGROUP delivered a full-cycle 5MWh pouch cell production line for Li-ion and Na-ion, enabling European energy storage production.
