2S 20A 8.4V Li-Ion BMS Protection Board with Cell Balancing

Features:

• 2S Battery Configuration: Designed for lithium-ion battery packs containing two cells or cell groups connected in series.

• 20A Working Current: Supports a rated maximum working current of 20A, subject to wiring, cooling, and operating conditions.

• Cell Balancing: Helps equalize the voltage of the two series-connected cells during charging to improve pack balance.

• Overcharge Protection: Disconnects the battery circuit when a cell reaches the board's overcharge detection threshold.

• Over-Discharge Protection: Helps prevent excessive battery discharge that can damage lithium-ion cells.

• Overcurrent Protection: Protects the battery pack against excessive current draw beyond the board's specified limits.

• Short-Circuit Protection: Helps disconnect the output when a short-circuit condition is detected.

• Low Standby Consumption: Designed for low quiescent current to minimize battery drain when the pack is not in active use.

• Compact PCB: Suitable for integration into rechargeable battery packs and portable electronic equipment.

Specifications:

• Product Type: Lithium-ion Battery Management System (BMS)

• Battery Configuration: 2S (two cells or cell groups in series)

• Compatible Chemistry: Standard 3.7V nominal lithium-ion or lithium-polymer cells

• Nominal Pack Voltage: 7.4V

• Full-Charge Voltage: 8.4V

• Maximum Working Current: 20A

• Overcurrent Protection Threshold: Approximately 25A, according to the supplier listing

• Overcharge Detection Voltage: Approximately 4.2–4.3V per cell

• Over-Discharge Detection Voltage: Approximately 2.5–2.6V per cell

• Cell-Balancing Activation Voltage: Approximately 4.17–4.2V per cell

• Balancing Current: Approximately 100mA

• Static Current: Less than 18µA

• Internal Resistance: Less than 7mΩ, as listed by the supplier

• Operating Temperature: -10°C to +50°C

• Approximate Dimensions: 48.4 × 20.1 × 4mm

• Protection Functions: Overcharge, over-discharge, overcurrent, short circuit, and cell balancing

Applications:

• 2S 18650 lithium-ion battery packs

• Rechargeable battery-powered devices

• Cordless tools with compatible voltage and current requirements

• Portable lighting systems

• DIY battery packs and electronics projects

• Robotics and mobile platforms

• Portable audio equipment

• Battery-powered control systems

• Electronic prototyping and development

• Custom rechargeable power supplies