What is a battery management system?

A battery management system (BMS) is an electronic system that is used to monitor, control and protect the operation and performance of batteries. It is commonly used in battery packs used in electric vehicles, portable electronics, energy storage systems and other applications where batteries play a central role.

The main functions of a battery management system are read more

Our components that make up a battery management system:

Master unit

The master unit is the heart of the battery management system (BMS). It is the central control element that coordinates and monitors various functions within the BMS. Some of the main tasks that our Master Unit takes on in a BMS are:

  • Monitoring and controlling the cells
  • Thermal management
  • Charging control
  • Discharge control
  • Communication
  • Fault detection and diagnosis
boostech BMS Top view

Slave boards

A slave board in a battery management system (BMS) is a component that is usually placed on each individual battery cell or on a group of cells. In contrast to the master unit, the slave board takes on more specific tasks at the level of individual cells or cell groups. Some of the main functions that a slave board fulfills in the BMS:

  • Cell monitoring
  • Balancing
  • Communication
EVE LF280K M6-Terminal Titelbild

Relay

The relay is required to carry out further safety shutdowns. If none of your peripheral components perform this function, a relay is required for these safety shutdowns.

STDP Relay 4Channel Main picture

Current sensors

As the name suggests, a current sensor is required to measure the current. This measures the incoming or outgoing current from the batteries.

boostech CanCurrentSensor main image

Add-ons for Masterunit V3

Add-ons are software extensions for the BMS Masterunit V3. This add-on enables communication protocols and relay channels, for example.

Accessories

Under accessories you will find adapters, power supply units and plugs for the BMS.

boostech adapter LLine to RJ45

Retro components

Retro components are parts that are compatible with the older version of the master unit (V2).

Our components that make up a battery management system:

Master unit

The master unit is the heart of the battery management system (BMS). It is the central control element that coordinates and monitors various functions within the BMS. Some of the main tasks that our Master Unit takes on in a BMS are:

  • Monitoring and controlling the cells
  • Thermal management
  • Charging control
  • Discharge control
  • Communication
  • Fault detection and diagnosis
boostech BMS Top view

Slave boards

A slave board in a battery management system (BMS) is a component that is usually placed on each individual battery cell or on a group of cells. In contrast to the master unit, the slave board takes on more specific tasks at the level of individual cells or cell groups. Some of the main functions that a slave board fulfills in the BMS:

  • Cell monitoring
  • Balancing
  • Communication
EVE LF280K M6-Terminal Titelbild

Relay

The relay is required to carry out further safety shutdowns. If none of your peripheral components perform this function, a relay is required for these safety shutdowns.

STDP Relay 4Channel Main picture

Current sensors

As the name suggests, a current sensor is required to measure the current. This measures the incoming or outgoing current from the batteries.

boostech CanCurrentSensor main image

Add-ons for Masterunit V3

Add-ons are software extensions for the BMS Masterunit V3. This add-on enables communication protocols and relay channels, for example.

Accessories

Under accessories you will find adapters, power supply units and plugs for the BMS.

boostech adapter LLine to RJ45

Retro components

Retro components are parts that are compatible with the older version of the master unit (V2).

What are the main functions of a BMS?

Monitoring the cells: The BMS monitors the condition of each individual battery cell to ensure that they are operating within certain voltage and temperature limits. This helps to extend the life of the battery and ensure that it is operated efficiently and safely.

Balancing (equalization): A BMS balances the charge states of the individual cells. As cells can have slightly different properties, this could otherwise lead to an imbalance, which would affect the overall performance and service life of the battery.

Thermal management: The BMS monitors the temperature of the battery. Temperatures that are too high or too low can impair performance and even lead to damage or safety risks.

Charge and discharge protection: The BMS protects the battery against harmful operating conditions, such as charging or discharging too quickly, which could shorten the service life of the battery. The currents are dynamically adjusted depending on the state of the battery.

Communication: Many modern BMS are able to transmit information about the battery status wirelessly or via interfaces to other control systems. This allows better integration into the overall system and enables smooth cooperation with, for example, a photovoltaic system, an electric motor or chargers.