The JBD NMC 7S-20AMP Hardware BMS

is a Battery Management System (BMS) designed to protect and manage 7-cell (7S) lithium-ion / NMC battery packs with a nominal voltage of around 25.9 V. It offers reliable hardware-level protection and passive cell balancing without requiring any Bluetooth or app configuration. This BMS is ideal for medium-power applications such as portable energy packs, e-bikes, tools, solar storage, and DIY battery systems. It ensures safer charging and discharging by monitoring cell voltages, current, and temperature to prevent common battery faults.

Key Features

Designed for 7S NMC (Lithium-ion) Packs — Works with battery packs made of 7 cells in series (nominal ~25.9 V).

20 A Continuous Current Rating — Supports up to 20 A continuous charge and discharge, suitable for moderate load systems.

Overcharge Protection — Prevents cells from exceeding their maximum safe voltage during charging.

Over-Discharge Protection — Stops discharge when cell voltages drop below safe thresholds to protect battery health.

Over-Current & Short-Circuit Protection — Cuts power in extreme current or fault conditions to avoid damage and hazards.