Product Overview
The OID SNR32700-45H is a high-performance rechargeable sodium ion battery (Na-ion) developed by Jianheng. With a 4.5Ah capacity and 3.0V nominal voltage, this 32700 cell is engineered for applications requiring high power, wide temperature tolerance, and extended cycle life. It features a remarkable 40C maximum discharge current and excellent low-temperature performance down to -40°C, making it an ideal power solution for demanding energy storage and high-rate discharge systems.
Key Specifications
| Parameter |
Specification |
| Typical Capacity |
4.5Ah (0.2C discharge) |
| Minimum Capacity |
4.45Ah (0.2C discharge) |
| Nominal Voltage |
3.0V |
| Operating Voltage |
1.5V ~ 3.9V |
| AC Impedance (1kHz) |
≤5mΩ (20% SOC, BOL) |
| Cell Weight |
125±3g |
| Dimensions (Diameter x Height) |
Φ32.4±0.1mm x 71±0.5mm |
Detailed Performance Parameters
Charge Parameters
| Parameter |
Specification |
Condition |
| Standard Charge Current |
0.5C |
25±2℃ |
| Standard Charge Voltage |
3.9±0.05V |
CC-CV, cut-off 225mA |
| Max Continuous Charge Current |
3C |
15~55℃, 100%SOC |
| Absolute Charge Temperature |
0~55℃ |
Stop charging if out of range |
Discharge Parameters
| Parameter |
Specification |
Condition |
| Standard Discharge Current |
0.2C |
25±2℃ |
| Max Continuous Discharge Current |
10C |
— |
| Max Discharge Current (non-cycle) |
40C |
Discharge time ≥10S |
| Max Pulse Cycle Discharge Current |
35C (35 pulse) |
— |
| Discharge Cut-off Voltage |
1.5V |
— |
| Absolute Discharge Temperature |
-40~80℃ |
Stop discharging if out of range |
Rate & Low Temperature Performance
| Test Condition (25℃±2℃) |
Capacity Retention |
| 0.2C Discharge |
100% (Baseline) |
| 0.5C Discharge |
≥97% |
| 1.0C Discharge |
≥95% |
| 2.0C Discharge |
≥93% |
| 5.0C Discharge |
≥90% |
| 10C Discharge |
≥85% |
| 20C Discharge |
≥80% |
| Temperature (1C Discharge) |
Capacity Retention |
| 80℃ |
≥95% |
| 0℃ |
≥90% |
| -20℃ |
≥85% |
| -30℃ |
≥80% |
| -40℃ |
≥70% |
Storage & Cycle Life
| Test Item |
Condition |
Performance |
| Room Temperature Storage |
28 days at 25℃, 100%SOC |
Cap Retention ≥90%, Cap Recovery ≥95% |
| High Temperature Storage |
30 days at 60℃, 100%SOC |
Cap Retention ≥80%, Cap Recovery ≥90% |
| Cycle Life (Standard) |
0.5C charge / 1C discharge |
1000 cycles ≥70% capacity |
| Pulse Cycle Life |
1C charge / 35C pulse discharge |
10000 cycles ≥90% capacity, 30000 cycles ≥80% capacity |
Key Features & Benefits
- Ultra-High Power Output: Supports up to 40C maximum discharge and 35C pulse discharge, delivering exceptional burst power for demanding applications.
- Wide Operating Temperature: Reliable discharge from -40℃ to 80℃, with robust low-temperature capacity retention (≥70% at -40℃).
- Extended Cycle Life: Delivers 30,000 pulse cycles at 35C discharge with 80% capacity retention, ensuring long-term durability.
- Safe Sodium-Ion Chemistry: Offers improved safety and stability compared to traditional lithium-ion systems.
- Low Impedance: AC internal resistance ≤5mΩ (1kHz) minimizes energy loss and heat generation.
Safety & Application Conditions
The OID SNR32700-45H is designed with rigorous safety standards. It complies with comprehensive safety tests including overcharge, over-discharge, short circuit, thermal abuse (130℃), crush, drop, and temperature cycling without fire or explosion.
Critical Application Requirements:
- Must be used with a Battery Management System (BMS) to monitor voltage, current, and temperature.
- Charging is prohibited below 0℃ to prevent performance degradation.
- Storage conditions: -20℃~45℃ (short-term) / 0℃~25℃ (long-term >3 months). Activate every 3 months by charging to 3.0V at 0.5C.
- Proper heat dissipation and waterproof design in the battery pack are mandatory.
- Do not mix cells with different part numbers in the same battery system.
Applications
Ideal for high-power applications such as power tools, automotive starting (Cold Cranking Amps - CCA), industrial equipment, robotics, emergency power systems, and high-rate energy storage solutions.
