This 3S Battery Management System is built around the BM3451BHDC-T28A chipset, optimized for 3.2V LiFePO₄ batteries. It features precise voltage thresholds, integrated 50mA cell balancing, and a full protections against overcharge, over-discharge, short circuit, overcurrent, temperature, and disconnection safety.
Preconfigured for 3S use via resistor shorts on B1 and B2, it supports both same-port and separate-port wiring. With 15 ultra-low resistance MOSFETs (8 for discharge, 7 for charge), it handles up to 60A continuous (same-port) or 80A discharge (different-port).
Technical Specifications
- Cell Configuration 3S
- Based on the BM3451BHDC-T28A smart BMS chipset:
- Overcharge Protection Voltage: 3.650 V
- Overcharge Release Voltage: 3.550 V
- Over-discharge Protection Voltage: 2.350 V
- Over-discharge Release Voltage: 2.550 V
- Discharge Overcurrent 1 Detection Voltage: 0.100 V
- Discharge Overcurrent 2 Detection Voltage: 0.300V
- Charge Overcurrent Detection Voltage: –0.100 V
- Short Circuit Detection Voltage: 0.600 V
- Balancing Voltage Threshold: 3.405 V
- Short Circuit Delay: 100–600 µs
- Short Circuit Recovery Off-load reset
- Balancing Current: 50 mA
- Overcharge Delay: 1.5–2.5 s
- Over-discharge Delay: 0.5–1.5 s
- Continuous Charge Current: 60 A
- Continuous Discharge Current (Same Port): 60 A
- Continuous Discharge Current (Different Port): 80 A
- Temperature Protection Yes
