BMS NMC 3S 20A DALY (a5s7)

DALY BMS NMC 3S 20A (A5S7) is a battery protection and management module designed for 3-series lithium-ion (NMC) battery packs. It supports 20A continuous discharge current and protects the battery from over-charge, over-discharge, over-current, short circuit, and temperature faults. This BMS is commonly used in 12V lithium battery packs, 18650 DIY batteries, power tools, solar lights, and portable electronics.

The DALY 3S 20A NMC BMS is a compact battery management board designed to safely operate three lithium-ion cells connected in series (3S configuration). It constantly monitors the voltage of each cell, pack current, and operating temperature to maintain safe charging and discharging conditions.

If abnormal conditions occur—such as over-charging, deep discharge, excessive current draw, or a short circuit—the BMS immediately disconnects the battery pack to prevent damage and ensure user safety.

The module also includes cell balancing, which equalizes the voltage of each cell during charging. This helps maintain battery efficiency and increases the lifespan of the battery pack.

Because of its 20A current capability, this BMS is suitable for medium-power applications like DIY battery packs, portable electronics, LED backup systems, robotics, and small electric devices.

Key Features

• Supports 3S lithium-ion (NMC) battery pack
• 20A continuous discharge current
• Built-in passive cell balancing
• Over-charge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• High-precision voltage monitoring
• Compact PCB design for easy installation