4S 12V 100A LiFePO4 BMS Circuit Board is a powerful battery management system designed for 4 series Lithium Iron Phosphate battery packs. This module ensures safe operation of 12.8V nominal LiFePO4 batteries by providing advanced protection features including overcharge, over-discharge, short circuit, and temperature protection. Available in Bangladesh from BDTronics, this BMS is ideal for high-current applications such as solar systems, electric vehicles, power tools, and backup energy systems.

This BMS is specifically designed for 3.2V LiFePO4 cells and must not be used with 3.6V or 3.7V lithium-ion batteries. BDTronics supplies this reliable 4S 100A LiFePO4 BMS module for engineers, technicians, and DIY users in Bangladesh.

Features:

• Designed for 4S LiFePO4 battery pack (12.8V nominal)

• High current support up to 100A for discharge and protection

• Accurate overcharge protection per cell

• Over-discharge protection to extend battery lifespan

• Built-in cell balancing for uniform charging

• Fast short circuit protection with microsecond response

• Temperature protection for safe high load operation

• Disconnect protection for enhanced safety

• Stable MOSFET-based high current control design

• Optimized for LiFePO4 chemistry with long cycle life support

• Suitable for solar storage, EV systems, and power tools

• Reliable performance under heavy load conditions

• Available from BDTronics Bangladesh for professional battery projects

Specifications:

• Battery type: LiFePO4 (Lithium Iron Phosphate)

• Configuration: 4S (4 cells in series)

• Nominal voltage: 12.8V (3.2V × 4)

• Charging voltage: 14.4V (3.6V × 4)

• Overcharge protection voltage (per cell): 3.61V – 3.69V

• Overcharge protection delay: 1.5 – 2.5 seconds

• Over-discharge protection voltage (per cell): 2.27V – 2.43V

• Over-discharge recovery voltage: 2.45V – 2.65V

• Maximum charging current: 60A

• Maximum discharge current: 100A

• Overcurrent protection: 100A

• Balance current: 50mA

• Balance voltage accuracy: 3.355V – 3.455V

• Short circuit protection: Yes

• Short circuit delay: 100 – 600 µS

• Short circuit recovery: Load disconnect required

• Temperature protection: Yes

• Disconnect protection: Yes

How to Use:

• Connect four LiFePO4 cells in series (4S configuration)

• Connect B- to battery pack negative terminal

• Connect B1, B2, B3 to intermediate cell connections

• Connect B+ to battery pack positive terminal

• Connect P+ and P- to load and charger output terminals

• Ensure proper wiring sequence before powering the system

• Use a 14.4V LiFePO4 charger for correct charging

• Do not use with lithium-ion 3.7V cells

• Avoid exceeding 100A discharge current for safety

Application Areas:

• Solar energy storage battery packs

• Electric vehicles (e-bike, e-rickshaw, EV systems)

• Backup power systems and UPS

• High power DIY battery packs

• Power tools battery systems

• Robotics and automation power supply

• RC hobby battery packs

• Industrial battery management applications

Package Include:

• 1x 4S 12V 100A LiFePO4 BMS Battery Protection Module

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