Shenzhen Topband Battery Co., Ltd
A professional manufacturer of LiFePO4 battery / lithium iron phosphate, dedicated to designing, researching, manufacturing, and exporting LiFePO4 batteries( cell & pack & energy storage system) to
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| Item | Specification | Remark | |
| 5.0 Nominal Capacity | 27Ah | 0.5C discharge capacity | |
| 5.1 Typical Capacity | 27.5Ah | ||
| 5.2 Internal Impedance | ≤8.0mΩ | By AC 1KHz | |
| 5.3 Nominal Voltage | 3.20V | ||
| 5.4 Cell Weight | 680±20g | containing package | |
| 5.5 End-of-charge Voltage | 3.65V | At CC mode | |
| 5.6 End-of-charge Current | 0.05C | At CV mode | |
| 5.7 End-of-discharge Voltage | 2.00V | ||
| 5.8 Charge Method | 0.5C CC/CV | 180 min | |
| 5.9 Quick Charge Method | 1C CC/CV | 90 min | |
| 5.10 Max Continuous Discharge current | 3C | Continuous Discharge Time: 18 minutes | |
| 5.11 Max pulse Discharge Current | 5C | Continuous Discharge Time: 10 seconds | |
| 5.12 Cycle Life | ≥2000cycles | 0.5C Continual Discharge: ≥80% (100% DOD) | |
| 5.13 Operating Temperature Range | Charging Temperature | 0～45℃ | Ambient temperature:25℃±5℃ Cell exterior temperature must be <65℃ |
| Discharging Temperature | -20～55℃
| Ambient temperature: 25℃±5℃ Cell exterior temperature not exceed 80℃ | |
| Storage Temperature | -20～35℃ | Recommended temperature range for long term storage is –10~ +30°℃ | |
| 5.14 Shelf Life | 2 year | ||
| 5.15 Appearance | Without break, scratch, distortion, contamination, leakage and so on | ||
@Ambient Temperature 25±5℃ & Humidity 45%~75%.
| Test item | Test Method | Criteria |
| 1. High Temperature Performance | A cell is charged in accordance with 6.2, and stored in an ambient temperature of 55℃±2℃ for 4 h,then discharged to cut-off voltage at a constant current of 0.5C. After that, fetch out the cell and place it in the ambient temperature of 23℃±2℃ for 4 h, then check its appearance. | 1.Capacity retention:≥95%; 2. No distortion, no rupture. |
| 2. Low Temperature Performance | A cell is charged in accordance with 6.2,and stored in an ambient temperature of -20℃±2℃ for 20hours,then discharged to cut-off voltage at a constant current of 0.5C. After that , fetch out the cell and place it in the ambient temperature of 23℃±2℃for 4hours, then check its appearance. | 1.Capacity retention:≥60%; 2.Nodistortion,no rupture |
| 3. 1C Normal Discharge Performance | A cell is charged in accordance with 6.2, then discharged to cut-off voltage at a constant current of 1C in an ambient temperature of 23℃±2℃. After that,fetch out the cell and place it in the ambient temperature of 23℃±2℃for 4h, then check its appearance | Capacity retention:≥95% |
| 4. 2C Normal Discharge Performance | A cell is charged in accordance with 6.2, then discharged to cut-off voltage at a constant current of 2C in an ambient temperature of 23℃±2℃. After that,fetch out the cell and place it in the ambient temperature of 23℃±2℃for 4h, then check its appearance | Capacity retention:≥90% |
| 5. Capacity Retention | A cell is charged in accordance with 6.2, and stored in an ambient temperature of 23℃±2℃ for 28d, then discharged to cut-off voltage at a constant current of 0.5C. | Capacity retention:≥80% |
| 6. Cycle Life (23℃±2℃) | A cell is charged to end-of-charge voltage at a current of 0.5C, and then charged at a constant voltage of 3.65V until the charge current is less than 0.05C, after that stored for 20min; Subsequently, the cell is discharged to cut-off voltage at a constant current of 0.5C, and stored 30min; prior to next charge-discharge cycle. The cell shall be continuously charged and discharged for 2000 times. | capacity retention:≥80% |
3. LiFePO4 Battery Cells 3.2V 27Ah Feature
5. Storage & Transportation
6. Warning & Tips
Please read and follow the specification and caution remarks on battery surface before use the battery. Improper use may cause heat, fire, rupture, damage or capacity deterioration of the battery. Shenzhen Topband Battery Co., Ltd. Describes is not responsible for any accidents caused by the usage without following our specification.
7. Application