MAJESTRONICZ
3S 20A 12.6V Lithium Battery BMS Protection Board for 18650 Li-ion Battery Pack
3S 20A 12.6V Lithium Battery BMS Protection Board for 18650 Li-ion Battery Pack
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The 3S 20A BMS Protection Board is designed for building and protecting 3-cell series lithium-ion battery packs. It supports a nominal battery-pack voltage of 11.1V and a fully charged voltage of 12.6V.
The board includes clearly marked battery connection points for 0V, 4.2V, 8.4V, and 12.6V, making it suitable for connecting three lithium-ion cells or three parallel cell groups in series.
It helps protect the battery pack against common electrical problems such as overcharging, over-discharging, excessive current, and short circuits. The compact PCB is suitable for DIY battery packs, rechargeable power supplies, robotics, LED lighting, electronic projects, and portable equipment.
Important: This board is intended for 3S lithium-ion battery configurations only. Use properly matched cells with the same voltage, capacity, chemistry, and condition. Confirm the wiring points before soldering.
Specifications
| Specification | Details |
|---|---|
| Product type | Battery Management System protection board |
| BMS configuration | 3S |
| Supported battery chemistry | Lithium-ion |
| Recommended cell type | 18650 Li-ion cells or compatible 3.7V cells |
| Number of series groups | 3 |
| Nominal pack voltage | 11.1V |
| Full-charge pack voltage | 12.6V |
| Maximum rated current | 20A |
| Individual cell full voltage | 4.2V |
| Battery connection markings | 0V, 4.2V, 8.4V and 12.6V |
| Protection functions | Overcharge, over-discharge, overcurrent and short-circuit protection |
| Board type | Common-port battery protection PCB |
| PCB colour | Green |
| Application | 3S rechargeable lithium battery-pack assembly |
| Package quantity | 1 piece |
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