LiFePO4 BMS 2S 6.4V 25A Battery Management System (BMS) Protection Board is designed to protect and manage 2-cell (2S) LiFePO4 battery packs. This BMS module provides overcharge protection, over-discharge protection, overcurrent protection, and balanced battery management to ensure safe charging and discharging of lithium iron phosphate battery packs.

The 2S 25A LiFePO4 BMS is suitable for battery packs built with 18650, 21700, 14500, 26650, 32650, and other LiFePO4 cells. It helps improve battery lifespan, enhances safety, and protects connected devices from battery-related damage. The compact design and low power consumption make it ideal for solar systems, backup power supplies, electric devices, DIY battery packs, robotics, and energy storage applications.

Features:

• 2S LiFePO4 Battery Management System (BMS)

• Designed for 6.4V nominal LiFePO4 battery packs

• Supports 2-cell series battery configuration

• Maximum charging current up to 25A

• Maximum continuous discharge current up to 25A

• Built-in overcharge protection

• Built-in over-discharge protection

• Built-in overcurrent protection

• Low internal resistance design

• Ultra-low standby power consumption

• Common port charging and discharging design

• Suitable for high-current battery applications

• Compact PCB design for easy installation

• Improves battery safety and lifespan

• Compatible with multiple LiFePO4 battery sizes

• Reliable battery pack protection circuit

Applications:

• LiFePO4 battery packs

• Solar energy storage systems

• Backup power systems

• DIY battery pack projects

• Portable power stations

• Electric vehicles and scooters

• Robotics power systems

• UPS battery packs

• Emergency lighting systems

• Battery-powered electronics

• Energy storage solutions

• Industrial battery systems

Protection Functions:

Overcharge Protection

• Detection Voltage: 3.7V ± 0.025V per cell

• Detection Delay: 100 ± 50ms

• Release Voltage: 3.5V ± 0.05V per cell

• Prevents battery damage caused by excessive charging

Over-Discharge Protection

• Detection Voltage: 2.0V ± 0.1V per cell

• Detection Delay: 100 ± 50ms

• Release Voltage: 2.4V ± 0.1V per cell

• Protects battery cells from deep discharge damage

Overcurrent Protection

• Discharge Overcurrent Protection: 90A

• Automatically disconnects output during excessive current conditions

• Helps prevent battery overheating and circuit damage

How to Use:

• Connect the battery cells according to the 2S wiring configuration.

• Connect B+, B1, and B- terminals to the battery pack.

• Connect charger and load to the common charging/discharging port.

• Verify correct polarity before applying power.

• Use a charger specifically designed for LiFePO4 battery chemistry.

• Ensure battery cells are matched in capacity and voltage before assembly.

Product Instructions:

• Use only with 2S LiFePO4 battery packs.

• Do not use with Li-ion or Li-Po batteries.

• Follow correct wiring sequence during installation.

• Avoid reverse polarity connections.

• Install in a dry and ventilated location.

• Ensure adequate insulation to prevent short circuits.

• Use suitable wire size for high-current applications.

• Check battery voltages before connecting the BMS.

Specifications:

• Product Type: LiFePO4 Battery Protection Board

• Battery Configuration: 2S

• Nominal Battery Voltage: 6.4V

• Battery Chemistry: LiFePO4

• Charging Voltage: 7.3V (2 × 3.65V)

• Wiring Type: Common Port

• Continuous Charging Current: 25A

• Continuous Discharge Current: 25A

• Discharge Overcurrent Protection: 90A

• Main Circuit Internal Resistance: ≤5mΩ

• Overcharge Detection Voltage: 3.7V ± 0.025V

• Overcharge Release Voltage: 3.5V ± 0.05V

• Over-Discharge Detection Voltage: 2.0V ± 0.1V

• Over-Discharge Release Voltage: 2.4V ± 0.1V

• Overcharge Detection Delay: 100 ± 50ms

• Over-Discharge Detection Delay: 100 ± 50ms

• Working Power Consumption: <10µA

• Sleep Power Consumption: <5µA

• Operating Temperature: -30°C to +80°C

• Product Size: 60 × 25 × 3.5mm

• Application: Battery Protection and Charging Management

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