Description
The 3S 20A 12.6V 18650 Li-ion Lithium Battery BMS Protection Board is designed for battery packs made using three 3.6V/3.7V lithium-ion cells connected in series. It provides battery protection and helps manage the charging and discharging of a 3S Li-ion battery pack.
This BMS board is compatible with commonly used 18650 and 26650 Li-ion cells, as well as suitable lithium polymer batteries. A 3S configuration provides a nominal battery voltage of approximately 11.1V, while the fully charged pack reaches 12.6V.
The board supports a stated maximum output current of 20A and is designed for applications where a compact battery protection circuit is required. It can be used in DIY battery packs, portable electronics, LED lighting, robotics, small power systems, and other rechargeable lithium battery projects.
Key Features
- Designed for 3S Li-ion battery packs
- Suitable for 18650 and 26650 cells
- Compatible with suitable LiPo battery cells
- Nominal battery pack voltage: 11.1V
- Charging voltage: 12.6V
- Maximum output current: 20A
- Maximum output/charging power: up to 252W
- Overcharge protection
- Over-discharge protection
- Short-circuit protection
- Compact PCB design
- Suitable for DIY battery pack construction
Battery Configuration
This BMS is intended for three lithium battery cells connected in series.
The recommended voltage points are:
0V → 4.2V → 8.4V → 12.6V
Follow the wiring diagram carefully during installation. Incorrect wiring can damage the BMS board and may create a safety hazard.
Important Battery Matching Advice
For better battery-pack performance, use three cells with similar capacity, condition, and internal resistance. Avoid combining significantly different or damaged cells in the same battery pack.
For a reliable 3S battery pack, use properly matched cells with the same nominal voltage and similar capacity.
Applications
The 3S 20A 12.6V BMS board can be used in:
- 3S 18650 battery packs
- 26650 Li-ion battery packs
- DIY rechargeable battery systems
- Portable electronics
- LED lighting projects
- Robotics projects
- DIY power supplies
- Battery-powered equipment
- Small electric projects
- Custom lithium battery packs
Specifications
| Specification | Details |
|---|---|
| Product Type | 3S Li-ion BMS Protection Board |
| Battery Configuration | 3S |
| Compatible Battery | Li-ion / LiPo |
| Compatible Cells | 18650, 26650 and similar 3.6V/3.7V cells |
| Nominal Pack Voltage | 11.1V |
| Charging Voltage | 12.6V–13V |
| Maximum Output Current | 20A |
| Maximum Output / Charging Power | 252W |
| Overvoltage Protection Range | 4.25–4.35V ± 0.05V |
| Over-discharge Protection Range | 2.3–3.0V ± 0.05V |
| Maximum Operating Current | 5A–6A |
| Instantaneous Current Limit | Up to 8A |
| 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 |
| Stated Service Life | More than 50,000 hours |
| Board Size | Approx. 50 × 16 × 1mm |
Reviews
There are no reviews yet.