Lithium Battery Charger Protection Module (BMS) 3S 60A 12.6V
The Lithium Battery Charger Protection Module (BMS) 3S 60A 12.6V is a high-capacity protection board designed for 3-cell Li-ion and LiPo battery packs. With a continuous discharge current of up to 60A, this module is ideal for high-power applications such as e-bikes, e-scooters, solar storage, robotics, and heavy-duty DIY power systems.
It safeguards your batteries by preventing overcharge, over-discharge, overcurrent, and short-circuits. In addition, it provides cell balancing to keep all cells at equal voltage levels, ensuring maximum performance, efficiency, and a longer lifespan for the battery pack.
How It Works
The BMS continuously monitors each cell in the 3S battery pack. If any cell exceeds ~4.25V, charging stops automatically to prevent overcharging. If a cell voltage falls below ~2.7V, the system disconnects the load to prevent deep discharge.
With its 60A high-current handling capability, the module can safely power demanding devices such as high-torque motors and inverters. Its short-circuit protection immediately cuts off the circuit during unsafe conditions, while the auto-recovery function allows normal operation to resume once the fault clears. The balancing feature keeps all three cells aligned, maximizing efficiency and safety.
Key Features
Designed for 3S Li-ion / LiPo packs (12.6V max)
High 60A discharge current capacity
Advanced protection: overcharge, over-discharge, overcurrent, short-circuit
Cell balancing for stable voltage across cells
Automatic recovery after fault conditions
Sturdy PCB design for high-power applications
Long lifespan with reliable safety functions
Specifications
| Parameter | Value |
|---|---|
| Battery Type | Li-ion / LiPo (3 cells in series) – |
| Maximum Pack Voltage | 12.6V |
| Rated Discharge Current | 60A |
| Overcharge Protection | ~4.25V ± 0.05V per cell |
| Over-discharge Cutoff | ~2.7V ± 0.05V per cell |
| Overcurrent Protection | 60A (typical) |
| Short-Circuit Protection | Yes |
| Balance Function | Yes (active balancing) |
| Operating Temperature | -20°C to +60°C |
| PCB Size | Approx. 60 × 25 × 3 mm |
Pin Configuration
| Pin/Pad | Label | Description |
|---|---|---|
| B+ | Battery Positive | Connects to the positive terminal of the pack |
| B- | Battery Negative | Connects to the negative terminal of the pack |
| B1 | Cell 1 connection | Between Cell 1 (+) and Cell 2 (-) |
| B2 | Cell 2 connection | Between Cell 2 (+) and Cell 3 (-) |
| P+ | Pack Positive | Output/charge positive terminal |
| P- | Pack Negative | Output/charge negative terminal |
Applications
High-power e-bikes and e-scooters
Solar energy storage systems
Robotics and automation projects
DIY lithium battery packs
Power inverters and backup systems
Heavy-duty portable power solutions
