1. Product Overview

This 16S active balancer board is designed to reduce voltage differences between the individual series groups of a compatible lithium battery pack.

Unlike a conventional passive balancer that dissipates excess energy as heat, an inductor-based active balancer transfers energy between cell groups. This can help maintain closer cell-voltage matching and improve the usable performance of a properly assembled battery pack.

The board has sixteen visible 1R0 inductors, multiple switching components and two multi-pin connectors for cell-voltage connections. The PCB is marked 16S.

This product is a balancing board only. It must not be treated as a replacement for a suitable battery-management system or protection BMS.

2. Technical Specifications

3. Main Features

• Designed for battery packs containing sixteen series-connected cell groups
• Inductor-based active balancing circuit
• Transfers energy between cell groups instead of relying only on resistive discharge
• Dedicated electronic components for the different balancing stages
• Two connectors simplify the connection of multiple cell-sensing wires
• Compact PCB format for internal battery-pack installation
• Four corner mounting holes
• Suitable for battery assembly, repair, testing and maintenance work

4. Suitable Applications

This active balancer may be suitable for compatible 16S battery packs used in:

• Electric scooters and electric vehicles
• Solar-energy storage batteries
• Inverter and UPS battery packs
• Portable power systems
• Robotics and automation equipment
• Custom lithium battery assemblies
• Battery repair and maintenance projects
• DIY energy-storage systems

Compatibility depends on the battery chemistry, individual cell voltage, total series configuration, connector wiring and balancing specifications.

5. Active Balancer and BMS Difference

An active balancer and a protection BMS perform different functions.

This balancing board should normally be used together with a correctly selected 16S protection BMS.

Do not assume that the balancer provides charge, discharge, overcurrent or short-circuit protection.

6. Compatibility Requirements

Before purchasing or installing this board, confirm:

• The battery has exactly sixteen series groups
• The battery chemistry is compatible with the board
• The cell-voltage operating range is suitable
• The balancing-current rating meets the application requirement
• The connector type and pin count match the wiring harness
• The balance-wire sequence matches the board
• The board dimensions fit inside the battery enclosure
• A separate protection BMS is installed where required

A 16S marking alone does not guarantee compatibility with every 16S lithium battery pack.

7. Installation Guidance

• Check the voltage of every series group before connecting the board.
• Confirm that no cell group is reversed, missing or severely discharged.
• Connect the sensing wires in the exact sequence specified for the board.
• Verify every adjacent sensing-wire voltage using a multimeter.
• Do not connect the harness by relying only on wire colours.
• Install the board on an electrically insulated surface.
• Keep adequate clearance around the inductors and electronic components.
• Prevent the PCB from touching the battery enclosure, nickel strips or busbars.
• Secure the board against vibration and movement.
• Test the system under supervision after installation.

8. Important Information

The following specifications cannot be confirmed from the supplied product image:

• Maximum balancing current
• Balancing-start voltage difference
• Operating-voltage range
• Supported battery chemistries
• Standby current
• Low-voltage shutdown behaviour
• Connector pin sequence
• Operating-temperature range

These values must be confirmed from the supplier’s datasheet or tested before the board is installed in a battery pack.

9. Safety Information

• Incorrect balance-wire order can damage the board immediately.
• Never connect or disconnect sensing wires while conductors are shorted.
• Do not reverse any cell-group connection.
• Do not use the board with a series configuration other than 16S.
• Keep the PCB away from water, conductive dust and loose metal objects.
• Insulate the board and all exposed connections after installation.
• Do not use a burnt, cracked, corroded or physically damaged board.
• Installation should be performed by a person familiar with lithium battery-pack wiring and safety.