4S 30A LifePo4 Lithium Iron Phosphate Battery Balanced Charging BMS PCB Board

The 4S 30A LiFePO4 (Lithium Iron Phosphate) Battery Management System (BMS) PCB board is designed for safe and efficient charging, discharging, and balancing of 18650 battery cells. This high-quality BMS ensures long battery life and reliable performance, making it ideal for DIY battery packs, solar energy systems, e-bikes, and other lithium battery applications. It features multiple protection functions including overcharge, over-discharge, overcurrent, and cell balancing for enhanced safety and durability.

Key Specifications:

Discharge

• Continuous Discharging Current: 30A (MAX)
• Instantaneous Discharge Current: 56A

Charge

• Charging Voltage: 14.8V
• Charging Current: 20A (MAX)

Overcharge Protection

• Over-charge Detect: 3.75±0.05V
• Protection Delay: 1300ms
• Over-charge Release Voltage: 3.60±0.05V

Balance Function

• Detect Voltage: 3.60±0.05V
• Release Voltage: 3.59±0.05V
• Balance Current: 58mA

Over-discharge Protection

• Over-discharge Detect: 2.1±0.08V
• Delay Time: 145s
• Release Voltage: 2.3±0.1V

Over-current Protection

• Detect Voltage: 200mV
• Detect Delay: 20ms
• Current Detection: 56±10A
• Release Condition: Cut Load

Inner Resistance

≤20mΩ

Self-Consumption

• Working Current: ≤30µA
• Sleep Current (Over-discharge): ≤20µA

Working Temperature Range

-30°C to +80°C

PCB Board Size

56 × 47mm (2.2 × 1.85″)

Additional Information

This BMS PCB is strictly designed for 4S LiFePO4 18650 battery packs and ensures that each cell is balanced for maximum safety and performance. It comes without a retail package and may have minor size variations of 1–3mm due to manual measurement. The actual color may vary slightly due to monitor differences. Please ensure these conditions are acceptable before purchase.

Package Includes:

• 1 × 4S LiFePO4 18650 Battery BMS PCB Protection Board

This 4S 30A LiFePO4 BMS is perfect for DIY electronics, energy storage systems, and any lithium battery application where safe charging, discharging, and cell balancing are essential. Its compact design and high-quality components ensure reliable operation and long-term durability.