PGYBMS Hardware Protection Board PGY106 5A20A 4S LiFePO4 Power Management & Protection Module

The PGY106 4S 25A BMS protection board is designed for monitoring and protecting 4-series LiFePO₄ battery packs.
It provides reliable hardware-level protection against over-charge, over-discharge, over-current, and short circuit, making it suitable for small to medium power battery systems.

Electrical Specifications:
Battery Configuration: 4S (LiFePO₄)
Nominal Pack Voltage: 12.8V
Maximum Charge Voltage: 14.6V
Continuous Charge Current: 25A
Continuous Discharge Current: 25A
Cell Nominal Voltage: 3.2V
Over-Charge Protection (per cell): 3.65V (typ.)
Over-Discharge Protection (per cell): 2.32V (typ.)

Port Configuration:
Same Port Design: Charge and discharge share the same negative terminal (C−)
Cell Voltage Monitoring: Individual cell sensing via balance connector
Control Method: Hardware protection IC solution

Mechanical & Environmental Specifications:
PCB Dimensions: 60 × 32 × 10 mm
Operating Temperature: −20°C to +65°C
Storage Temperature: −40°C to +90°C
Operating Voltage Range: 9.28V – 14.6V

Application Scenarios:
12.8V LiFePO₄ battery packs
Energy storage systems
Solar battery systems
Backup power supplies
DIY LiFePO₄ battery projects