The BM3451BHDC-T28A 3S LiFePO4 BMS is a battery protection and management board designed specifically for 3-cell LiFePO4 battery packs connected in series (3S).
The board monitors the voltage of each individual cell and provides protection against overcharge, over-discharge, overcurrent and short circuit. It also supports passive cell balancing to help maintain a more uniform voltage between the cells.
Battery Configuration
- Battery Type: LiFePO4
- Configuration: 3S
- Nominal Cell Voltage: 3.2V
- Battery Pack Nominal Voltage: 9.6V
- Maximum Charging Voltage: 10.95V
- Cells Required: 3 × LiFePO4 cells in series
Protection Functions
- Overcharge Protection
- Over-discharge Protection
- Discharge Overcurrent Protection
- Charge Overcurrent Protection
- Short-Circuit Protection
- Cell Voltage Monitoring
- Passive Cell Balancing
Technical Specifications
| Specification |
Details |
| Product Type |
LiFePO4 BMS Protection Board |
| BMS IC |
BM3451BHDC-T28A |
| Battery Chemistry |
LiFePO4 |
| Configuration |
3S |
| Number of Cells |
3 Cells in Series |
| Nominal Cell Voltage |
3.2V |
| Pack Nominal Voltage |
9.6V |
| Full Charge Voltage |
10.95V |
| Overcharge Detection |
3.65V / Cell |
| Overcharge Release |
3.55V / Cell |
| Over-discharge Detection |
2.35V / Cell |
| Over-discharge Release |
2.55V / Cell |
| Balance Start Voltage |
3.405V / Cell |
| Cell Balancing |
Yes |
| Balancing Type |
Passive |
| Discharge Overcurrent Protection |
Yes |
| Charge Overcurrent Protection |
Yes |
| Short-Circuit Protection |
Yes |
| IC Package |
TSSOP-28 |
| Application |
3S LiFePO4 Battery Packs |
Recommended Charger
For a 3S LiFePO4 battery pack, use a:
10.95V LiFePO4 charger
Do not use a standard 12.6V 3S Li-ion charger, because Li-ion and LiFePO4 have different charging voltages.
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