DALY BMS NMC 20S 50A

DALY BMS NMC 20S 50A

The DALY BMS NMC 20S 50A is a 20S 50A NMC lithium-ion Battery Management System designed for battery packs that need compact, dedicated electrical protection. It combines cell-voltage supervision with power-path control to support safer charging and discharging while keeping the protection hardware practical for EV, energy-storage, robotics and custom battery-pack integration.

This 20S NMC BMS is designed around 20 cell groups connected in series. In a standard 3.7V nominal lithium-ion/NMC system, that represents approximately 74.0V nominal pack voltage. The 50A designation identifies the product's current class, making it easy to select the appropriate protection-board family for the intended battery build. As a hardware BMS, the board sits directly in the battery's protection path and manages the charge/discharge circuit when electrical limits are reached.

DALY hardware BMS products are widely used as compact lithium battery protection boards for mobility, backup and energy-storage packs, with dedicated MOSFET switching for charge/discharge protection. Core BMS protection functions include overcharge protection, over-discharge protection, overcurrent protection and short-circuit protection. These functions help prevent the cell stack from operating outside its intended electrical window and provide an additional protection layer between the battery cells, charger and connected load. DALY hardware BMS construction combines a compact protection PCB with MOSFET power switching, a widely used architecture for lithium-ion battery packs in mobility and energy applications.

The board's 20S architecture also supports cell-group voltage monitoring across the series string. Its compact PCB format is suited to battery enclosures where efficient space utilization, short interconnect paths and serviceable wiring are important. The result is a practical NMC battery protection board for assemblers who need a model-specific, current-specific hardware BMS rather than a universal smart controller.

The DALY BMS NMC 20S 50A is intended for 20S NMC/lithium-ion battery packs in the 50A product class. It is suitable for cylindrical, pouch or prismatic lithium-ion cells when they are assembled into the corresponding 20-series configuration. The product works with a chemistry-correct lithium-ion charging system and integrates with standard battery-pack wiring, fusing and high-current interconnects. Its series-specific format makes it a strong choice for new battery builds, replacement BMS projects, prototype packs and OEM battery assemblies.

Applications

• 20S high-voltage NMC battery packs for e-mobility and traction systems

• Electric scooter, light-EV and custom vehicle battery assemblies

• Industrial DC power, robotics and automation battery modules

• Backup power and energy-storage systems using series-connected lithium-ion cells

• OEM and prototype high-voltage battery packs for commercial equipment

Installation Guide

For professional battery-pack assembly, install the BMS using the terminal labels and wiring diagram supplied for the board. Connect the battery negative and cell-sense points in sequence, then complete the pack output and charging connections according to the marked B-, P- and C- terminals where present. Use appropriately sized conductors, nickel or bus connections, secure insulation and a correctly rated fuse. After assembly, commission the battery with a compatible NMC/lithium-ion charger and a controlled load so the complete pack can be checked under normal operating conditions.

Why Choose ARB Accessories?

ARB Accessories supplies a broad range of NMC BMS, Li-ion battery management systems, hardware BMS boards and battery-pack assembly components for Indian OEMs, battery assemblers, service teams and project builders. The DALY BMS NMC 20S 50A gives buyers a clear 20S / 50A configuration for easier product selection, while ARB's wider BMS range makes it practical to source matching battery protection, wiring, connectors, fuses and related pack-building hardware from one supplier.