SmartElex 3s Li-ion BMS


In stock

SKU: 1021494
  1. Input Voltage: 19V 5A Recommended.
  2. Charge Current: up to 2A.
  3. Over-voltage detection: 4.2V.
  4. Under-voltage detection: 3V.
  5. Discharging Rate: – up to 7A. Above 10A cut off.


(inc GST)

In stock

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Brand: SmartElex
Category: Battery Protection Board
Tags: Li-ion BMS

A Battery Management System (BMS) is a smart element of a Li-ion battery pack responsible for monitoring and protection.  The lithium-ion batteries can be used only in specified conditions, and therefore battery management system is essential in order to monitor battery state and ensure the safety of operation.

A battery management system (BMS) is an electronic module that controls a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, controlling its environment, authenticating it.

The SmartElex 3s BMS device is a highly integrated Li-ion switched-mode battery-charge controller. The device offers a constant-frequency synchronous switching PWM controller with high–accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation, and charge status monitoring.

The device operates on a 19V DC 5A(minimum) wall adapter that connects through DC Jack or 2 pin connectors onboard. Our SmartElex 3s Li-ion board supports up to 7A. SmartElex 3s Li-ion BMS have various protection like Overvoltage, Undervoltage, Overcurrent during discharge (OCD). SmartElex 3s Li-ion BMS have Status LEDs indicating battery status by which we will know cell in overvoltage, under-voltage.

Switching Mode:

LED ON Input Power is ok
LED OFF Input power is low.


Both L1 and C ON Charging
L1 OFF 3 cell battery voltage above 12.6V.
C LED OFF Anyone cell is detecting Overvoltage


D LED Discharging
D ON Cell voltage in range. Can be discharged
D OFF or Fluctuating Under voltage detect.

Features : 

  1. Input Interface: 2Pin connector and DC JACK input.
  2. Output Interface: – 2 Pin Connector with properly marked positive and negative signs on PCB.
  3. LED indicator: Input Power status/ Charging / Charge complete / Over-voltage / under-voltage.
  4. High-accuracy voltage detection circuit.
  5. Using high voltage device charging terminal.
  6. The battery charge and discharge can control the MOS transistor.

Package Includes:

1 x SmartElex 3s Li-ion BMS

Input Voltage(Recommended)

19V 5A

Charge Current

Up to 2A

Over-voltage Detection


Under-voltage Detection


Discharging Rate

Up to 7A, Above 10A cut off

Shipment Weight

0.1 kg

Shipment Dimensions

11 × 10 × 3 cm

1 Month Warranty

This item is covered with a standard warranty of 1 month from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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