120A Smart BMS for 6–17S 12V–60V Li-ion/LiFePO4 Battery Packs with RS485, Bluetooth & Active Balancing

ltem	PCM-L17S120-N01（NCM）	PCM-L17S120-N01（LiFePO4）
Max continious current	120A	120A
Series	6-17S	6-17S
Internal resistance	≤5mΩ	≤5mΩ
Overcharge protection voltage	4.25±0.1V	3.75±0.1V
Overcharge protection delay time	1S	1S
Overcharge recovery voltage	4.20±0.1V	3.50±0.1V
Overdischarge protection voltage	2.5±0.1V	2.3±0.1V
Overdischarge protection delay time	1S	1S
Overdischarge recovery voltage	3.0±0.1V	2.50±0.1V
Balance Start Voltage	4.0±0.1V	3.4±0.1V
Balance Start Current	68±10mA	58±10mA
Charging Overcurrent Protection	140±20A (Delay 1S)
Short circuit Overcurrent Protection	850±100A (≤400 uS)
Over-Temperature Protection	65±3℃(Delay 1S)
Charging Low-Temperature Protection	‘-20±3℃(Delay 1S)
Discharging Low-Temperature Protection	-20±3℃(Delay 1S)
Mos temperature	90±3℃
Short circuit protection	YES
Recovery state	Disconnect load or Software rest
Balancing Function	YES
Dimension	160*63*14.5mm
With NTC	YES
With Bluetooth	Optional
With Pre-charge, Pre-discharge Function	YES
RS485/CAN/UART	YES
Customize	YES

Product Highlights:
This 120A Smart BMS is engineered for 6–17S Li-ion or LiFePO4 battery packs, covering a wide voltage range from 12V to 60V. It features RS485 and Bluetooth communication for seamless integration with monitoring systems or mobile APPs. The system includes active cell balancing to ensure pack longevity and performance, and supports a continuous 120A discharge current, making it ideal for high-power applications. With a common port design, robust MOSFETs, and comprehensive protection features, this BMS is widely used in solar energy storage systems, telecom base stations, AGVs, electric mobility, RVs, and marine power solutions. A perfect choice for manufacturers seeking advanced battery management with real-time control and industrial-grade reliability.