TDT BMS NMC 7S 20A

TDT BMS NMC 7S 20A

The TDT BMS NMC 7S 20A is a 7S 20A 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 7S NMC BMS is designed around 7 cell groups connected in series. In a standard 3.7V nominal lithium-ion/NMC system, that represents approximately 25.9V nominal pack voltage. The 20A 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.

TDT protection boards are commonly used in compact lithium-ion battery packs where a simple hardware BMS is preferred over a communication-heavy smart BMS architecture. 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. The TDT hardware protection-board format is compact and practical for integration into custom lithium-ion battery packs, replacement assemblies and OEM battery modules.

The board's 7S 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 TDT BMS NMC 7S 20A is intended for 7S NMC/lithium-ion battery packs in the 20A product class. It is suitable for cylindrical, pouch or prismatic lithium-ion cells when they are assembled into the corresponding 7-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

• 7S NMC battery packs for e-bikes, e-scooters and light electric mobility

• Robotics, automation and motor-driven battery modules

• Portable power stations, DC backup systems and field equipment

• Solar, UPS and custom lithium-ion energy-storage modules

• OEM battery-pack production for industrial and 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 TDT BMS NMC 7S 20A gives buyers a clear 7S / 20A 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.