The 4S 10A LiFePO₄ (LFP) BMS Protection Board is a Battery Management System (BMS) designed to protect 4-series (4S) 3.2V LiFePO₄ battery packs. It provides overcharge, over-discharge, overcurrent, short-circuit, and cell balancing protection, ensuring safe charging and discharging of the battery pack. It is ideal for solar energy storage, electric vehicles, portable power stations, DIY battery packs, UPS systems, and energy storage applications.
Features
- Full Name: 4S 10A LiFePO₄ Battery Management System (BMS)
- Designed for 4S LiFePO₄ battery packs
- Supports 3.2V LiFePO₄ cells
- Built-in cell balancing function
- Overcharge protection
- Over-discharge protection
- Overcurrent and short-circuit protection
- Compact PCB design
- Easy wiring and installation
Specifications
| Specification | Value |
|---|---|
| Product Type | Battery Management System (BMS) |
| Battery Type | LiFePO₄ (LFP) |
| Battery Configuration | 4S (4 Cells in Series) |
| Nominal Battery Voltage | 12.8V |
| Full Charge Voltage | 14.6V |
| Maximum Continuous Discharge Current | 10A |
| Maximum Charging Current | 10A |
| Balancing Function | Yes |
| Overcharge Protection Voltage | Approx. 3.65V ±0.05V per Cell |
| Over-discharge Protection Voltage | Approx. 2.0V ±0.1V per Cell |
| Short-Circuit Protection | Yes |
| Operating Temperature | -20°C to +60°C |
Pin Configuration
| Pin | Description |
|---|---|
| B− | Battery Pack Negative |
| B1 | Cell 1 Positive |
| B2 | Cell 2 Positive |
| B3 | Cell 3 Positive |
| B+ | Battery Pack Positive |
| P− | Charge/Discharge Negative |
| P+ | Charge/Discharge Positive (Connected to B+) |
Note: Connect the balance wires in the correct sequence (B− → B1 → B2 → B3 → B+) before connecting the charger or load. Incorrect wiring may permanently damage the BMS.
Applications
- 12.8V LiFePO₄ battery packs
- Solar energy storage systems
- UPS battery packs
- Portable power stations
- Electric bicycles and scooters
- DIY battery packs
- Emergency backup systems
- Robotics and automation
- Energy storage projects
Advantages
- Complete battery protection
- Cell voltage balancing
- Extends battery life
- Safe charging and discharging
- Compact and lightweight
- Reliable performance
- Easy installation
Size
| Specification | Value |
|---|---|
| PCB Dimensions | Approx. 60 × 45 × 5 mm |
| Mounting Hole Diameter | Approx. 3 mm |
| Weight | Approx. 25 g |
Package Includes
- 1 × 4S 10A LiFePO₄ (LFP) BMS Protection Board
Note: This BMS is only compatible with 4S (12.8V nominal) LiFePO₄ battery packs using 3.2V cells. It is not suitable for 3.7V Li-ion or LiPo batteries. Always use a 14.6V LiFePO₄ charger and verify all wiring connections before powering the battery pack to ensure safe operation.






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