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BMS 5S 100A 21V – Protection and Balancing Module for 5 x 18650 Batteries
The BMS 5S 100A module provides full protection for 5 Li-Ion 18650 cells connected in series, ensuring balancing, overcharge protection, deep discharge protection, short-circuit protection, and overcurrent protection.
It is ideal for DIY projects, power banks, electric tools, RC vehicles, or solar applications that require a stable 21V output.
Each cell is individually monitored. The module automatically discharges cells that exceed the optimal voltage, maintaining balance across all 5 batteries for maximum performance.
Technical Specifications
| Parameter | Value |
|---|---|
| Battery Compatibility | Li-Ion 18650 (5S) |
| Nominal Voltage | 21V (5 x 4.2V) |
| Continuous Charging Current | 60A |
| Continuous Discharge Current | 80A |
| Peak Current | 100A |
| Max Voltage per Cell | 4.25 ± 0.05V |
| Min Voltage per Cell | 3.00 ± 0.025V |
| Balancing Current | 60mA |
| Short-Circuit Protection | Yes |
| Dimensions | 62 x 42 x 3.4 mm |
| Compatible with 3S / 4S | Yes |
Recommended Applications
- Drills and electric screwdrivers
- Drones, RC cars, portable tools
- Robot vacuum cleaners, battery-powered fans
- DIY systems with rechargeable batteries
Main Benefits
- Extends battery lifespan
- Full protection at all levels
- Automatic cell balancing
- Ideal for hobby and professional projects
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