2S-4A Li-ion Battery Management System (BMS)

Overview:
The 2S-4A Li-ion BMS is a compact and efficient Battery Management System designed for 2-series (2S) lithium-ion batteries, such as 18650 cells. With a continuous discharge current of 4A, this BMS provides essential protection features to ensure the safe operation and longevity of your battery pack.

Key Specifications:

• Battery Configuration: 2S (7.4V nominal, 8.4V fully charged)

• Continuous Discharge Current: 4A

• Overcharge Detection Voltage: 4.25V ±0.05V per cell

• Overcharge Release Voltage: 4.15V per cell

• Over-discharge Detection Voltage: 2.75V ±0.05V per cell

• Over-discharge Release Voltage: 3.00V per cell

• Overcurrent Protection: 12A ±1A

• Short Circuit Protection: Yes

• Temperature Protection: Yes

• Balance Function: No

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

• Dimensions: Typically specified in millimeters (mm), e.g., 50mm x 20mm x 3mm

• Material: Usually made of durable PCB (Printed Circuit Board) material

• Included Components: Pre-welded nickel strip for easy connection

Protection Features:

• Overcharge Protection: Prevents battery overcharging by disconnecting the charging path when the voltage exceeds 4.25V per cell.

• Over-discharge Protection: Disconnects the load when the battery voltage drops below 2.75V per cell to prevent deep discharge.

• Overcurrent Protection: Detects excessive current draw and disconnects the load to prevent damage.

• Short Circuit Protection: Automatically disconnects in case of a short circuit to protect the battery and connected devices.

• Temperature Protection: Monitors temperature and disconnects if it exceeds safe limits.

Applications:

• DIY power banks

• Portable electronics

• LED lighting systems

• Backup power solutions

• Robotics and embedded systems