4S 20A JLGW LiFePO₄ (LFP) Battery Management System (BMS) with Balancing

Overview:
The 4S 20A JLGW BMS is a reliable battery management solution specifically designed for 4-cell LiFePO₄ (LFP) battery packs. With support for up to 20A continuous discharge current, it ensures safe operation through multiple protection features and includes passive balancing to maintain battery health and performance.

Technical Specifications:

• Battery Type: LiFePO₄ (LFP)

• Cell Configuration: 4S (4 cells in series)

• Nominal Voltage: 12.8V

• Maximum Charge Voltage: 14.6V (3.65V per cell)

• Overcharge Protection: Approx. 3.75V per cell

• Over-discharge Protection: Approx. 2.5V per cell

• Continuous Discharge Current: 20A

• Peak/Overcurrent Protection: 25A to 35A (depending on version)

• Short Circuit Protection: Yes, with auto recovery

• Cell Balancing Type: Passive balancing

• Balancing Current: 30 to 60 mA per cell

• Quiescent Current: Less than 50 µA

• Operating Temperature: -20°C to +60°C

• Port Configuration: Common port or separate charge/discharge ports (based on model)

• PCB Form Factor: Long rectangular layout (compact)

Protection Features:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Short circuit protection

• Cell voltage balancing

• Optional temperature protection (on select models)

Typical Applications:

• 12V LiFePO₄ battery packs

• Solar energy storage systems

• Backup power supplies (UPS)

• Portable battery boxes

• DIY battery packs

• Light electric vehicles and tools