Industrial 13M40A-FK Battery Management and Protection PCB

The Industrial 13M40A-FK Battery Management and Protection PCB is a 13S Li‑ion BMS board engineered to monitor, balance, and protect a 13‑cell lithium‑ion pack. It operates with a 46.8 V nominal voltage and a maximum charge voltage of 54.6 V, and it supports a continuous discharge current of 40 A. Key protections include overcharge, over-discharge, overcurrent, and short-circuit protection, along with cell balancing to maintain uniform cell voltages across the pack. This PCB is intended for internal battery pack mounting and provides battery cell connections and power terminals for integration into 48 V systems. The board carries markings ANN888, 02N22, and 15A7BNR, and the part number is 13M40A-FK, with the manufacturer listed as Unknown / OEM. Commonly used in 48 V Li‑ion packs for e‑bikes, scooters, portable energy storage systems, and industrial battery-powered equipment, it is also employed by maintenance teams, battery rebuilders, and OEMs for battery pack repairs, BMS replacements, and refurbishment of lithium‑ion power systems.