5S 15A 18650 Li-ion Lithium Battery BMS Charger Protection Board for 18V 21V Battery - Battery Management System (1pcs)

This 5S 15A Battery Management System (BMS) Charger Protection Board is designed for lithium-ion battery packs, particularly 18650 cells configured for 18V and 21V applications. The board provides essential protection functions to maintain battery safety and longevity.

It monitors individual cell voltage to prevent overcharging and over-discharging, with precise voltage thresholds for detection and recovery. The BMS board supports efficient power management with very low power consumption during operation.

The protection circuitry includes configurable delay times for both overcharge and discharge events, allowing the battery pack to maintain stability under varied conditions. This board is suitable for use in battery packs for electric tools, DIY battery assemblies, and other portable power systems requiring reliable protection.

Applications

• Battery protection for 5-cell (5S) lithium-ion battery packs

• Use in 18V and 21V battery-powered tools and devices

• Suitable for DIY battery pack assemblies

• Ensures safe charging and discharging processes

Features

• Low power consumption: 30 μA per cell in active state

• Very low power in idle: 3 μA per cell

• Overcharge detection voltage range: 4.18V to 4.22V per cell

• Overcharge recovery voltage: 4.05V to 4.15V per cell

• Adjustable overcharge delay: 0.5 to 2.0 seconds

• Over-discharge detection voltage: 2.75V to 2.85V per cell

• Over-discharge recovery voltage: 2.90V to 3.20V per cell

• Adjustable discharge delay: 0.5 to 2.0 seconds

Specifications

• Cell Configuration: 5 cells in series (5S)

• Maximum Current: 15A

• Voltage Range: Designed for 18V and 21V lithium-ion battery packs

• Power Consumption (Active): 30 μA per cell

• Power Consumption (Idle): 3 μA per cell

• Overcharge Voltage Detection: 4.18V – 4.22V per cell

• Overcharge Recovery Voltage: 4.05V – 4.15V per cell

• Overcharge Delay: 0.5s / 1.0s / 2.0s selectable

• Over-discharge Voltage Detection: 2.75V – 2.85V per cell

• Over-discharge Recovery Voltage: 2.90V – 3.20V per cell

• Discharge Delay: 0.5s to 2.0s

Package Includes:

• • 1 x 5S 15A BMS Charger Protection Board

  • 1 x Connector Cable