2S 7.4V 8A Li-ion 18650 Lithium Battery Charger Protection Board

Specifications:

• Type: 2S (Two series) Lithium-ion Battery Protection Board
• Application: Designed for use with 7.4V (nominal) lithium-ion batteries (specifically, two 3.7V 18650 cells connected in series).

Electrical Specifications:

• Operating Voltage: 7.4V (Nominal)
• Charging Voltage: 8.4V (Full Charge Voltage for 2S configuration)
• Overcharge Protection:
  • Overcharge Detection Voltage: 4.25V ± 0.05V per cell
  • Overcharge Release Voltage: 4.15V ± 0.05V per cell
  • Overcharge Delay: 1.0 to 2.0 seconds
• Over-discharge Protection:
  • Over-discharge Detection Voltage: 2.5V ± 0.05V per cell
  • Over-discharge Release Voltage: 2.9V ± 0.1V per cell
  • Over-discharge Delay: 1.0 to 2.0 seconds
• Short Circuit Protection: Yes, automatic recovery
• Overcurrent Protection: Yes
  • Overcurrent Detection Current: 12A ± 3A
  • Protection Delay: 1.0 to 2.0 seconds
  • Release Condition: Automatic recovery when the load is removed
• Balancing Function: Some boards include cell balancing to ensure uniform charging of the 18650 cells.

Thermal & Environmental Specifications:

• Operating Temperature Range: -40°C to 85°C
• Storage Temperature: -40°C to 125°C
• Thermal Shutdown: Some protection boards may include thermal shutdown features to prevent overheating.

Features:

• Overcharge Protection: Automatically prevents the cells from overcharging.
• Over-discharge Protection: Automatically prevents the cells from discharging too much.
• Short Circuit Protection: Automatically cuts off the circuit in case of short circuits.
• Overcurrent Protection: Detects and cuts off high current surges.
• Cell Balancing: Ensures that both cells charge evenly to prolong the life of the battery pack.

Applications:

• Electric toys
• Power tools
• Solar energy systems
• Portable electronic devices (e.g., power banks, flashlights)

Notes:

• Always ensure proper wiring and insulation when installing to avoid accidental short circuits or damaging the battery cells.
• Use with appropriate 18650 lithium-ion cells (ensure matching capacity and voltage ratings).

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