3S/4S/5S 12V/16.8V/21V 100A BMS for Lithium Battery with Balance Charging
Description:
3S/4S/5S BMS (Battery Management System) is a high-current protection circuit designed for lithium-ion or LiFePO4 battery packs, supporting configurations of 3 cells (12.6V), 4 cells (16.8V), and 5 cells (21V) in series. It includes active balance charging to equalize cell voltages, which improves battery health, lifespan, and safety. Capable of handling up to 100A continuous discharge current, it's ideal for high-drain applications like e-bikes, power tools, and solar storage systems.
Features:
1. Flexible Series Support
2. High Current Capability
3. Balance Charging Function
4. Advanced Protection Features
5. Multiple Connection Terminals
6. Thermal Efficiency
7. Smart Design
8. Compact & Durable
Diagram:
Specifications:
| Supported Series (S) | 3S (12.6V), 4S (16.8V), 5S (21V) |
| Continuous Discharge Current | 100A |
| Charging Current | Up to 50A–60A |
| Balance Function | Yes |
| Balance Current | 30–60 mA per cell |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +80°C |
| PCB Material | FR-4, 2 oz copper trace |
| Dimensions | ~60mm–90mm (L) × 40mm–60mm (W) × 5–10mm (H) |
| Weight | 50g–120g |
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