3S 40A 12.6V BMS Li-ion Lithium Battery Protection Board (Enhanced/Balanced) – Price in Pakistan

3S 40A 12.6V BMS Li-ion Lithium Battery Protection Board (Enhanced Version)

Overview

The 3S 40A BMS is a high-performance battery management system designed for 12.6V Lithium-ion packs. It provides essential protection for 3-series battery configurations (18650/26650 cells), ensuring safety during charging and discharging. This module is specifically built to handle high-current demands, making it the perfect choice for high-power DIY projects and electric tool repairs.

Key Features

• High-Current Support: Supports continuous discharge up to 40A and charging up to 20A.

• Full Protection Suite: Built-in protection against overcharge, over-discharge, over-current, and short circuits.

• Efficient Design: Utilizes 10 low-resistance MOSFETs to minimize heat and maximize power delivery.

• Automatic Recovery: Automatically restores output once the fault condition is removed.

Technical Specifications

Feature	Specification
Series Configuration	3S (3 Cells in Series)
Nominal Voltage	11.1V / 12V
Charging Voltage	12.6V – 13.6V
Continuous Discharge Current	40A (Max)
Peak Starting Current	80A (Instantaneous)
Dimensions	41mm x 60mm

Common Applications

• Power Tool Repairs: Ideal for upgrading or repairing 12V cordless drills (e.g., DeWalt, Makita, Bosch).

• DIY 12V Battery Packs: Build custom battery packs for LED strips, WiFi routers, and DC fans.

• Solar Energy Storage: Manage small-scale solar battery storage for emergency backup lighting.

• Robotics: Power high-torque DC motors in mobile robot platforms.

Important Installation Guide

For successful operation, ensure you follow the wiring sequence below:

1. Connect the B- (0V) battery terminal.

2. Connect the B1 (4.2V) terminal.

3. Connect the B2 (8.4V) terminal.

4. Finally, connect the B+ (12.6V) terminal.

   Note: Using high-drain “Power Cells” is highly recommended when using this BMS for electric motors or drills.