The 8S 25A Lithium Iron Phosphate LiFePO4 BMS Circuit Board with Balancer & Heat Sink by BDTronics is a high-performance battery management system designed for LiFePO4 battery packs. This BMS ensures safe charging and discharging of 8-series lithium iron phosphate cells while providing efficient balancing and protection features. It is ideal for electric vehicles, solar energy storage, home battery packs, DIY battery projects, e-bikes, e-scooters, and other high-current applications.

The integrated heat sink ensures stable operation even under heavy loads, while the precise overcharge, over-discharge, overcurrent, and temperature protections safeguard your batteries. The BMS supports same-port wiring, making installation simple and efficient, while the low standby power consumption of ≤40uA ensures minimal energy loss. Its compact design with 603310MM dimensions makes it easy to integrate into battery packs, and the 2.0mm cable spacing with 40cm cable length allows flexible connectivity.

This BMS from BDTronics is optimized for reliable performance in a wide temperature range of -40°C to +80°C, ensuring durability in harsh conditions and extended battery life. It is perfect for both professional and DIY users who require a safe and efficient LiFePO4 battery management solution.

Features:

• Wiring method: same port

• Over-charging temperature: -2°C to 55°C

• Discharge over temperature: -30°C to 70°C

• Working power consumption: ≤40uA

• Main circuit conduction internal resistance: ≤15mΩ

• Temperature range: -40°C to +80°C

• Disconnection protection: yes

• Same port wiring instructions:

  • B-: Connect to the negative pole of the battery

  • P-: Connect to the negative electrode of charge and discharge

• Cable size: 2.0MM spacing / 9 lines / 40CM length

• Product dimensions: 603310MM

• Integrated heat sink for efficient thermal management

• Compact and easy-to-install design for DIY and commercial battery packs

Discharge:

• Over-discharge protection voltage: 2.3V ±0.08V

• Over-discharge recovery voltage: 2.5V ±0.08V

• Continuous working current: 25A–35A

• Instantaneous protection current: 65A

• Overcurrent recovery conditions: charging recovery or disconnecting the load

• Short circuit recovery conditions: charging recovery or disconnecting the load

Charge:

• Overcharge protection voltage: 3.75V ±0.025V

• Overcharge recovery voltage: 3.55V ±0.025V

• Continuous charging current: 25A

• Charge balance voltage: 3.75V ±0.025V

• Charge balance current: 40mA (maximum)

• Recommended charger voltage: 30V

• Automatic cell balancing ensures even charge distribution and prolongs battery life

• Easy integration with standard LiFePO4 chargers and power systems

Installation & Usage Instructions:

• Connect B- to the battery pack’s negative terminal

• Connect P- to the negative terminal of the charger and load

• Ensure proper cable spacing and secure connection to avoid short circuits

• Avoid exposing the BMS to temperatures outside the operating range (-40°C to +80°C)

• Ensure load and charger currents do not exceed rated limits (25A continuous, 65A instantaneous)

• Mount the BMS in a well-ventilated area to maximize heat sink efficiency

• For multiple BMS integration, maintain same-port wiring configuration for each unit

• Use with LiFePO4 batteries only to ensure proper functioning of overcharge and discharge protections

Specifications:

• Wiring method: same port

• Overcharge temperature: -2°C to 55°C

• Over-discharge temperature: -30°C to 70°C

• Working power consumption: ≤40uA

• Main circuit conduction internal resistance: ≤15mΩ

• Operating temperature range: -40°C to +80°C

• Dimensions: 603310MM

• Cable spacing: 2.0MM / 9 lines / 40CM length

• Discharge over-voltage protection: 2.3V ±0.08V

• Overcharge protection voltage: 3.75V ±0.025V

• Continuous current: 25A–35A

• Instantaneous current protection: 65A

• Charge balance current: 40mA max

• Recommended charger voltage: 30V

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