Description
The 3S 10A 12.6V 18650 Li-ion Lithium Battery BMS Protection Board is designed for battery packs made from three lithium-ion cells connected in series (3S). It provides essential protection and battery management functions to help protect the connected cells during charging and discharging.
This BMS board is suitable for 18650, 26650, and compatible 3.6V/3.7V Li-ion or lithium polymer battery cells. A 3S battery pack has a nominal voltage of approximately 11.1V and reaches 12.6V when fully charged, making this module suitable for a wide range of rechargeable battery projects.
The board provides protection against conditions such as overcharge, over-discharge, excessive current, and short circuits. It is a practical solution for DIY battery packs, portable electronics, LED lighting, small electric projects, and other applications requiring a protected 3S Li-ion battery pack.
Key Features
- Designed for 3S Li-ion battery packs
- Compatible with 18650 and 26650 lithium-ion cells
- Suitable for 3.6V/3.7V Li-ion battery cells
- Nominal battery pack voltage: 11.1V
- Full-charge voltage: 12.6V
- Charging voltage: 12.6V
- Maximum output current: 10A
- Overcharge protection
- Over-discharge protection
- Over-current protection
- Short-circuit protection
- Compact PCB design
- Suitable for DIY rechargeable battery packs
Important Wiring Instructions
Correct wiring is essential when installing this 3S BMS board. Connect the three cells in series and follow the board’s wiring diagram carefully.
The connection points correspond to the battery voltage levels:
0V → 4.2V → 8.4V → 12.6V
Incorrect wiring can damage the BMS protection circuit.
After connecting the battery pack, the board may require an initial charging activation before the output becomes available.
Battery Matching Recommendation
For reliable operation, use three cells with similar capacity and internal resistance. Avoid mixing old and new cells or batteries with significantly different capacities or conditions.
For best results, use properly matched 18650 or 26650 Li-ion cells from the same type and specification.
Applications
The 3S 10A 12.6V BMS board can be used for:
- 3S 18650 battery packs
- 26650 Li-ion battery packs
- DIY rechargeable battery projects
- Portable electronics
- LED lighting systems
- DIY power supplies
- Battery-powered equipment
- Small electric projects
- Lithium-ion battery backup systems
Specifications
| Specification | Details |
|---|---|
| Model | HX-3S-01 |
| BMS Type | 3S Li-ion Battery Protection Board |
| Compatible Battery | Li-ion / Lithium Polymer |
| Compatible Cells | 18650, 26650 and similar 3.6V/3.7V cells |
| Battery Configuration | 3S |
| Nominal Pack Voltage | 11.1V |
| Charging Voltage | 12.6V–13V |
| Maximum Output Current | Up to 10A |
| Maximum Operating Current | 5A–6A |
| Instantaneous Current Limit | Up to 8A |
| Overvoltage Protection Range | 4.25–4.35V ± 0.05V |
| Over-discharge Protection Range | 2.3–3.0V ± 0.05V |
| Quiescent Current | Less than 30µA |
| Internal Resistance | Less than 45MΩ |
| Short-Circuit Protection | Yes |
| Operating Temperature | -40°C to +50°C |
| Storage Temperature | -40°C to +80°C |
| Service Life | More than 50,000 hours |
| Application | 3S Li-ion battery packs |
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