PGYBMS Hardware Protection Board PGY122 20A 13S Li-ion NMC Power Management & Protection Module

The PGY122 13S 20A BMS protection board is designed for monitoring and protecting 13-series lithium-ion (NMC / ternary) battery packs.
It provides reliable hardware-level protection against over-charge, over-discharge, over-current, short circuit, and temperature, making it suitable for electric mobility applications.

Electrical Specifications:
Battery Configuration: 13S (Lithium-ion / NMC)
Nominal Pack Voltage: 46.8V
Maximum Charge Voltage: 55.25V
Continuous Discharge Current: 20A
Continuous Charge Current: 15A
Cell Nominal Voltage: 3.6–3.7V
Over-Charge Protection (per cell): 4.25V (typ.)
Over-Discharge Protection (per cell): 2.7V (typ.)

Port Configuration:
Port Type: Separate charge and discharge design
Charge & Discharge Terminal: C−
Battery Negative Terminal: B−
Control Method: Hardware protection IC solution
Balancing Function: Not supported

Mechanical & Environmental Specifications:
PCB Dimensions: 50 × 32 × 10 mm
Operating Temperature: −20°C to +65°C
Storage Temperature: −40°C to +90°C
Operating Voltage Range: 35.1V – 55.25V

Application Scenarios:
13S lithium-ion (NMC) battery packs
Electric bicycles
Light electric vehicles
DIY lithium-ion battery pack projects