| Specific Current (A/kg): 1,125 A/kg Cont. / 2,250 A/kg Pulse |
Continuous Power: 3,375 W/kg (40C / 72.0 A Continuous) |
All-Climate Operation: −40°C to +60°C (≥80% Cap. @ −40°C) |
Safety & Impedance: 0V Safe (≥99% Rec.) • ≤3.0 mΩ (1kHz) |
1. Scientific Overview & Polyanionic NFPP High-Power Benchmark
The ATOMFAIR® 135070-3.0V-1.8Ah-I (Series SEHEY-1.8Ah) is an industrial-grade, ultra-high-rate polyanionic sodium-iron pyrophosphate-phosphate (NFPP, Na4Fe3(PO4)2(P2O7)) prismatic pouch cell engineered for heavy-duty pulse discharge, cold-cranking starters, hybrid energy storage buffers, and extreme sub-zero applications. Built with an open 3D polyanionic framework cathode, an optimized high-rate hard-carbon anode, and an ultra-low-viscosity sodium electrolyte, the cell delivers an internal AC impedance of ≤ 3.0 mΩ (1 kHz) within a compact 64 ± 5 g footprint.
By minimizing ohmic overpotentials and mass-transport limitations, this 1.8 Ah (5.4 Wh) cell sets an extraordinary power benchmark for chemical batteries: an exceptional continuous specific current of 1,125 A/kg (40C / 72.0 A), an instantaneous 3-second pulse specific current of 2,250 A/kg (80C / 144.0 A), and a continuous gravimetric power density of 3,375 W/kg (peak pulse: 6,750 W/kg). Furthermore, its robust covalent P–O framework guarantees intrinsic thermal and electrical safety, passing nail penetration and 0V deep discharge without fire or thermal runaway.
High-Rate & Low-Temperature Benchmark: Retains ≥ 80% discharge capacity at −40°C and ≥ 90% capacity at 30C high-rate discharge, delivering ≥ 3,000 cycles at 1C/1C (≥80% retention) and ≥ 200 cycles under severe 5C charge / 30C discharge loading (≥75% retention).
2. Core Architecture & Extreme-Environment Advantages
Housed in a precision 135070 prismatic pouch format (50 × 70 × 12.8 mm) with high-conductivity aluminum-to-copper nickel-plated tabs, the cell delivers two decisive performance advantages over conventional lithium and sodium chemistries:
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1,125 A/kg Continuous / 2,250 A/kg Pulse Delivery
Engineered with thick-foil, low-tortuosity active coatings and dual 12 × 0.3 mm nickel-plated tabs, preventing local hotspots and severe voltage sag during intense power bursts:
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0V Over-Discharge Safe & Thermal Abuse Immunity
Covalent polyanionic bonds eliminate oxygen release at high potential or high temperature, making the cell virtually immune to catastrophic thermal runaway:
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3. Verified Technical, Dimensional & Thermal-Rate Specifications
All parameters below are verified factory specifications for the ATOMFAIR Model 135070-3.0V-1.8Ah-I (SEHEY-1.8Ah) cell tested at 25 ± 2°C and 45–85% RH:
3.1 Essential Electrical, Gravimetric & Tab Parameters
| Technical Parameter | Verified Specification | Test Basis / Condition |
|---|---|---|
| Cell Model & Chemistry | 135070-3.0V-1.8Ah-I • Polyanionic Sodium-Ion (NFPP) | SEHEY-1.8Ah Series |
| Nominal Capacity | 1.8 Ah (Minimum ≥ 1.8 Ah) | 0.5C CC/CV to 3.9V, 0.5C discharge to 1.5V |
| Nominal Energy | 5.4 Wh (~84.4 Wh/kg gravimetric density) | 0.5C discharge @ 25°C |
| Nominal Plateau Voltage | 3.0 V | Single-cell plateau voltage |
| Operating Voltage Window | 1.5 V to 3.90 V (1.0 V cut-off for ≥10C / low-temp tests) | Charge cut-off current: 0.05C |
| Continuous Specific Current | 1,125 A/kg (40C continuous / 72.0 A) | 10–45°C ambient window |
| Pulse Specific Current (3s) | 2,250 A/kg (80C pulse / 144.0 A) | 0–45°C ambient window |
| Continuous Specific Power | 3,375 W/kg (Peak pulse: 6,750 W/kg) | Calculated from 3.0V × discharge current |
| Internal Impedance (AC 1 kHz) | ≤ 3.0 mΩ | 1 kHz AC four-terminal bridge |
| Standard / Max Charge Current | 1C (1.8 A) Standard / 6C (10.8 A) Maximum | CC/CV to 3.90 V (0.05C cut-off @ 23–35°C) |
| Cell Dimensions (W × H × T) | 50 ± 0.5 mm (W) × 70 ± 1 mm (H) × 12.8 ± 0.2 mm (T) | Strict portrait format (excluding tabs) |
| Electrode Tab Geometry | Center Pitch L1 = 25 ± 1 mm; Length L2 = 15.0 ± 0.5 mm; Width L3 = 12 ± 0.2 mm; Thickness 0.3 mm | Al-to-Cu transition with Ni plating |
| Cell Net Weight & Shipping SOC | 64 ± 5 g | Shipped at ~50% SOC | Self-discharge ≤3% (28 days @ 30–50% SOC) |
| Storage Temperature Window | −30°C to +35°C, Relative Humidity < 70% (~50% SOC) | 28d @ 25°C: ≥97% retention / ≥98% recovery |
3.2 Temperature-Coupled Maximum Charge & Discharge Current Envelopes
| Temperature Band | Max Allowed Charge Current | Max Continuous Discharge Current |
|---|---|---|
| −40°C to −30°C | Charging Prohibited | 5C (9.0 A) • [0.5C retention ≥80% @ −40°C] |
| −30°C to −20°C | Charging Prohibited | 20C (36.0 A) • [0.5C retention ≥85% @ −20°C] |
| −20°C to −15°C | 0.2C (0.36 A) | 30C (54.0 A) |
| −15°C to −10°C | 0.3C (0.54 A) | 30C (54.0 A) |
| −10°C to −5°C | 0.5C (0.90 A) | 30C (54.0 A) |
| −5°C to 0°C | 1.0C (1.80 A) | 30C (54.0 A) • [0.5C retention ≥97% @ 0°C] |
| 0°C to 10°C | 5.0C (9.00 A) | 30C (54.0 A) |
| 10°C to 23°C | 5.0C (9.00 A) | 40C (72.0 A) • [80C / 144 A pulse for 3s] |
| 23°C to 35°C | 6.0C (10.80 A) (Peak Charge Rate) | 40C (72.0 A) • [0.5C retention ≥100% @ 25°C] |
| 35°C to 45°C | 3.0C (5.40 A) | 40C (72.0 A) • [0.5C retention ≥100% @ 45°C] |
| 45°C to 60°C | 2.0C (3.60 A) | 30C (54.0 A) • [0.5C retention ≥100% @ 60°C] |
4. Verified Abuse & Safety Test Suite, Applications & Storage Maintenance
4.1 Factory Mechanical & Electrical Abuse Verification Suite
| Abuse Test Item | Test Protocol (100% SOC Charged @ 1.0C to 3.9V) | Verified Result |
|---|---|---|
| Overcharge Abuse | Charge at 3.0C constant current to 5.1 V at 25 ± 2°C | No fire, no explosion |
| 0V Over-Discharge Abuse | Discharge at 1.0C to 0.0 V, rest 30 min, recharge at 1.0C to 3.9 V | No fire/leakage; ≥99% recovery |
| Nail Penetration Test | Penetrate geometric center with Φ0.8 mm tungsten steel needle at 80 mm/s | No fire, no explosion |
| External Short Circuit | Direct short circuit across terminals (circuit resistance ≤ 5 mΩ) for 10 min | No fire, no explosion |
| 130°C Hotbox Thermal Shock | Ramp at 5°C/min to 130 ± 2°C and hold for 30 minutes | No fire, no explosion |
| Thermal Shock Cycling | −40°C (1 h) ↔ +85°C (1 h) rapid transition for 32 consecutive cycles | No fire, no explosion |
| Crush & Heavy Impact | R75 mm semi-cylinder crush to 2.67 kN / 15% deformation; 9.1 kg impact from 610 mm | No fire, no explosion |
| Low Pressure, Drop & Vibration | 11.6 kPa for 6 h; 1.2 m drop onto concrete (4×); 10–55 Hz (0.16 mm) sweep for 90–100 min | No leakage, no fire, no explosion |
4.2 Storage Maintenance Schedule & Tab Welding Instructions
- Long-Term Storage Recharge Schedule: Store cells at ~50% SOC in a cool, dry environment (−30°C to 35°C, <70% RH). For storage exceeding 30 days, recharge to ~50% SOC every 6 months (at −10°C to 30°C), every 3 months (at 30°C to 45°C), or every 1 month (at 45°C to 60°C);
- Tab Soldering / Ultrasonic Spot Welding: Both tabs feature an aluminum-to-copper transition with nickel plating (12 mm width × 15 mm length × 0.3 mm thickness), enabling direct nickel-strip laser/spot welding or low-temperature soldering without specialized aluminum flux;
- Dedicated Sodium-Ion Cycler / BMS Settings: Configure upper charge cut-off to 3.90 V (3.60 V for high-rate 5C/30C pulse buffering) and lower discharge cut-off to 1.50 V (1.00 V under ≥10C pulse load).
5. Production-Ready Battery Cells & Packs Selection Matrix
Compare the 135070 1.8Ah high-rate NFPP pouch cell against complementary production-ready ATOMFAIR finished battery cells and assembled packs (100% production-ready, no dry cells):
| Product Model | Format & Chemistry | Capacity & Rate | Primary Application |
|---|---|---|---|
| NFPP 135070 Pouch Cell (This Model) | Prismatic Pouch • NFPP Sodium-Ion | 1.8 Ah • 1,125 A/kg (40C/80C) | Cold-cranking starters & pulse energy storage |
| 18650 Cylindrical Sodium-Ion Cell (1.8Ah) | 18650 Cylindrical • Sodium-Ion | 1.8 Ah (1800 mAh, 3.0 V) | Cylindrical fixture packs & standard holders |
| High-Rate Semi-Solid Pouch Cell (17Ah) | Prismatic Pouch • Semi-Solid | 8–17 Ah • 12C Continuous | High-capacity drone & robotics power |
| High-Rate Li-Ion Power Cell (4Ah) | Prismatic Pouch • High-Rate Li-Ion | 4.0 Ah • 7C Continuous | High-current lithium-ion power buffering |
| Semi-Solid Pouch Battery Pack (56Ah) | Multi-Cell Pack • 6S–18S Modules | 56 Ah • 3.95V Base Module | Turnkey high-energy battery module arrays |
Need custom module assembly (e.g. 4S1P 12V cold-start battery packs) or laser-welded busbars? Inquire About Custom Battery Pack Engineering
Custom Battery Pack Prototyping & Cell Grading
Atomfair provides precision cell batch grading (capacity matching within ±1%, OCV sorting, and AC impedance pairing within ΔIR ≤ 0.2 mΩ), custom spot-welded nickel interconnects, laser-welded terminal busbars, and integrated high-rate BMS protective enclosures.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
