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This 4S 25A LiFePO4 Battery Management System (BMS) is designed to provide safe, efficient, and reliable protection for 4-cell (12.8V) Lithium Iron Phosphate (LiFePO4) battery packs. With integrated balancing and a durable heat sink, it ensures stable performance, extended battery life, and enhanced safety during charging and discharging cycles.

Ideal for DIY battery packs, solar energy storage systems, e-bikes, and other high-performance applications, this BMS offers multiple layers of protection including overcharge, over-discharge, overcurrent, short circuit, and temperature monitoring.

Features:

• Same-Port Wiring – Supports both charging and discharging from the same port for simple installation.

• Built-In Heat Sink – Enhances heat dissipation for stable high-current performance.

• Intelligent Balancing – Ensures equal charge across all cells to prolong battery lifespan.

• Comprehensive Protection – Safeguards against overcharge, over-discharge, short circuit, overcurrent, and temperature extremes.

• Low Power Consumption – Ultra-low working current ≤40uA reduces battery drain during standby.

• Durable & Compact Design – Small footprint for easy integration into battery packs.

Specifications:

• Wiring Method: Same Port

• Working Power Consumption: ≤40uA

• Main Circuit Internal Resistance: ≤15mΩ

• Temperature Range: -40°C to +80°C

• Disconnection Protection: Yes

• Cable Size: 2.0mm pitch / 9-pin / 40cm length

• Product Dimensions: 60 × 33 × 10 mm

• Over-Discharge Voltage: 2.3V ±0.08V

• Recovery Voltage: 2.5V ±0.08V

• Continuous Discharge Current: 25A

• Instantaneous Protection Current: 75A

• Recovery: Charging or load disconnection

• Overcharge Voltage: 3.75V ±0.025V

• Recovery Voltage: 3.55V ±0.025V

• Continuous Charging Current: 25A

• Charge Balance Voltage: 3.75V ±0.025V

• Balance Current: Up to 40mA

• Recommended Charger Voltage: 15V

Applications:

• LiFePO4 battery packs (12.8V, 4S)

• Solar energy storage systems

• Electric bicycles and scooters

• Power tools and DIY battery projects

• Backup power supply systems