2S 7.4V 3A Li-ion Cell Battery Protection BMS Circuit

A 2S 7.4V 3A Li-ion Cell Battery Protection BMS Circuit is an electronic circuit designed to protect a lithium-ion battery pack consisting of two cells (2S) from damage and ensure safe operation. It monitors the battery's voltage, current, temperature, and state of charge (SOC) to prevent overcharge, over-discharge, short circuit, and overcurrent conditions.

Key Features:

• Overcharge protection: Prevents the battery from being charged beyond its maximum voltage, which can lead to thermal runaway and fire.
• Over-discharge protection: Prevents the battery from being discharged below its minimum voltage, which can damage the battery cells and reduce their capacity.
• Short circuit protection: Automatically disconnects the battery if a short circuit occurs, preventing excessive current flow and potential fire hazards.
• Overcurrent protection: Limits the current flowing through the battery to prevent overheating and damage.

Specifications:

• Input voltage: 2S Li-ion (7.4V nominal)
• Continuous discharge current: 3A
• Peak discharge current: 5A (short-term)
• Charging current: 2A
• Operating temperature: -20°C to +60°C

Applications:

• Portable electronics: Smartphones, tablets, laptops, power banks
• Power tools: Cordless drills, saws, grinders
• Medical devices: Defibrillators, pacemakers, insulin pumps
• RC models: Helicopters, airplanes, cars, boats
• Renewable energy systems: Solar panels, wind turbines
• Emergency lighting: Backup power for LED lights and flashlights

DATA SHEET AND USECASE

Key Features:

• Overcharge Protection: Activates when the voltage of any cell exceeds 4.25V to 4.35V ± 0.05V, preventing potential damage from overcharging.

• Over-discharge Protection: Engages when the voltage of any cell drops below 2.5V to 3.0V ± 0.05V, protecting the cells from deep discharge, which can lead to capacity loss or failure.

• Overcurrent and Short-circuit Protection: The BMS is equipped to detect overcurrent situations and short circuits, ceasing battery operation to prevent potential hazards. It supports a continuous discharge current of up to 3A and can handle peak currents up to 5A.

• Temperature Range: Operational within a temperature range of -40°C to +50°C, making it suitable for various environmental conditions.