
Microcontroller
3S BMS
A reliable 3S BMS protection board designed for 11.1V lithium-ion battery packs using 18650 cells. It offers essential safety features like overcharge, over-discharge, and short-circuit protection for DIY projects.
₹66.00
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About 3S BMS
The 3S BMS (Battery Management System) is a critical protection module designed for 3-cell series lithium-ion battery packs, typically using 18650 cells, to provide a nominal voltage of 11.1V. This board actively monitors the voltage of each individual cell to prevent overcharging (overvoltage) and over-discharging, which significantly extends the battery pack's lifespan and ensures safety. It features robust short-circuit protection and thermal management capabilities, with some models including temperature monitoring and fan control. Ideal for electric vehicles, power banks, LED lighting, and DIY energy storage projects, this BMS ensures balanced charging and discharging across all cells. Choosing this component provides a cost-effective and reliable safety solution for your custom battery builds, preventing potential hazards and optimizing performance. It is essential for anyone building a battery pack from 18650 cells, ensuring stable and safe operation.
Technical Specifications
| Configuration | 3S (3 cells in series) |
|---|---|
| Nominal Voltage | 11.1V |
| Charge Voltage | 12.6V |
| Continuous Discharge Current | 20A (Standard version) |
| Short Circuit Protection | Yes |
| Overcharge Protection | Yes (per cell) |
| Over-discharge Protection | Yes (per cell) |
| Cell Compatibility | 3.6V/3.7V Li-ion (e.g., 18650) |
| Operating Temperature | -20°C to 60°C (approx.) |
| Dimensions | Approx. 50mm x 20mm x 10mm (varies by model) |
Alternative Components
4S BMS
2S BMS
BMS-20A-3S-S
3S 40A BMS









