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.
