3S 20A SLCT Li-ion Battery Management System (BMS)

Overview:
The 3S 20A SLCT Li-ion BMS is a protection and management circuit designed for 3-cell lithium-ion (Li-ion) battery packs connected in series. Supporting up to 20A continuous discharge current, this BMS ensures safe and efficient operation of the battery by managing voltage levels, current flow, and cell balancing.

Technical Specifications:

• Battery Type: Lithium-ion (Li-ion / NMC)

• Cell Configuration: 3S (3 cells in series)

• Nominal Voltage: 11.1V (3.7V × 3)

• Maximum Charge Voltage: 12.6V (4.2V × 3)

• Overcharge Protection Voltage: ~4.25V per cell

• Over-discharge Protection Voltage: ~2.8V per cell

• Continuous Discharge Current: 20A

• Overcurrent Protection: Typically 25A to 30A

• Short Circuit Protection: Yes, with auto-recovery

• Cell Balancing: Passive balancing included

• Balancing Current: Approximately 30–60 mA per cell

• Quiescent Current (Idle Drain): Less than 50 µA

• PCB Format: Compact and efficient design

• Port Configuration: Common port or separate port (varies by version)

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

Protection Features:

• Overcharge protection

• Over-discharge protection

• Overcurrent protection

• Short circuit protection

• Passive cell voltage balancing

Applications:

• Medium-power 3S Li-ion battery packs

• Power tools

• DIY e-bikes and scooters

• Portable electronics and power banks

• Robotics and RC applications

• Solar-powered backup systems