Battery Management System (BMS)

Electric Motorsport is the North American distributor of the EMUS BMS - the most flexible BMS in the world!

The EMUS flexible distributed-hybrid topology BMS G1 architecture that was introduced in 2010 lets our customers assemble the system for virtually any battery application. It has been used by many satisfied customers around the world for years in electric vehicles, maritime, home and industrial energy storages and many other applications.

Application Examples:

Click to jump to application descriptions / example configuration diagrams.

EMUS BMS Mini (Centralized)
EMUS G1 CCGM (Centralized CAN Cell Group Module) Configuration
EMUS G1 BMS (Distributed) Regular Configuration
EMUS G1 BMS (Distributed) Grouped Configuration
EMUS G1 BMS (Distributed) Master/Slave Redundancy Configuration

EMUS BMS Mini (Centralized)

The EMUS BMS Mini is designed to be very simple to install and configure. It has all required BMS functional blocks integrated and does not need any external components to make your Lithium cells into a fully functional battery pack of up to 16 cells and currents with 45 Amperes continuous. Due to its integrated LIN and CAN interfaces it can be enhanced into a system capable of handling much higher currents.

The BMS Mini has integrated low energy Bluetooth which is intended to be configured and monitored from an Android or iOS device.

Application Example:

EMUS G1 CCGM (Centralized CAN Cell Group Module) Configuration

The EMUS Centralized Cell Group Module or “Slave unit” has been updated and the new version [CCGM022] is equipped with two CAN connectors for easy BMS system assembly. Updated software allows data transfer down to 100ms update period. Each CCGM is capable of managing from a minimum of 6, up to 16 lithium cells and a total of 32 CCGM units can be connected in series, parallel or mixed topology. So, one Control Unit client is capable of monitoring up to 512 cells per battery pack.

EMUS Centralized Cell Group Modules can be easily connected with already prepared CAN connection cables (30cm, 100cm, or custom length) and other accessories, which makes the EMUS BMS likely the easiest to assemble BMS system in the world!

Application Example:

EMUS G1 BMS (Distributed) Regular Configuration

In this configuration, the BMS controls one package of Lithium cells connected in series ranging from 1 to 255 cells with capacities from few up to thousands of Amp-hours each. The whole package is controlled by a Control Unit which interfaces with Cell Modules that are directly mounted on the battery cells. Each Cell Module measures a cell’s voltage and temperature and returns this information back to the Control Unit via the communication wire. The Cell Modules are interconnected with a single communication wire running from module to module. The first Cell Module (at the “–” terminal of the pack) and last Cell Module (at the “+” of the pack) are connected to the Control Unit via optical Top/Bottom Isolators which perform data interface adaption and ensure the Control Unit’s circuit isolation from high voltages of the battery pack. The Current Sensor is inserted in the battery’s power line and is connected to the Control Unit for charging and discharging over-current protection as well as measuring transferred charge for SOC/ SOH evaluations.

Application Example:

EMUS G1 BMS (Distributed) Grouped Configuration

In many applications the whole battery needs to be split into separate blocks or groups of cells that might be placed in different locations of the vehicle or other device. Packs may be needed to be connected in series and/or parallel configurations to achieve needed battery characteristics.

In such cases the EMUS BMS can be configured to use CAN Cell Group Modules instead of Top/Bottom Isolators and communication to each group is performed separately via robust CAN bus link. The Control Unit supports up to 32 CAN Cell Group Modules. Each CAN Cell Group Module can process up to 255 Cell Modules thus allowing the whole EMUS BMS to handle up to 8,160 cells.

A Display Unit may be connected to the Control Unit in this or any other configuration scenario to indicate the key battery parameters to the operator or driver of vehicle.

Application Example:

EMUS G1 BMS Distributed or Centralized Master/Slave Redundancy Configuration

For applications requiring modularity, redundancy or hot-swap capability several EMUS BMS systems can be combined using Master/Slave of the Control Unit. In some applications, the whole battery needs to be split into separate blocks or battery modules that might be placed in different locations of the vehicle or other device. Battery pack modules may be connected in series and/or parallel configurations to achieve needed battery characteristics.

EMUS G1 Master/Slave Topology

This topology is used to build large Lithium-ion battery systems mostly in electric energy storage (EES) applications where high power, capacity and modularity are required. Such BMS configuration not only allows to build large ESS systems, but also provides redundancy features. For example, if one of the battery strings/subsystems runs out of power, other battery strings can remain in operation to provide power continuously. Up to 6 MWh power energy storage systems can be built with off-the-shelf products and larger systems can be made with customized solutions.

EMUS G1 Master/Slave System

This is a combination of several commonly used EMUS G1 Distributed Grouped or Centralized CCGM subsystems. Simply said, up to 18 strings, with each string having its own G1 Control Unit can be interconnected into one large system. Among all the 18 Control Units, one of them is automatically designated as the “Master CU” and the remaining Control Units as “Slave CUs”. In this array, the “Master CU” is gathering information from the “Slave CUs” and commands operational logic as well as communication with external devices such as chargers, inverters, VCU, PLC, etc. The entire system configuration is easily made on the EMUS Control Panel, which is provided free of charge to EMUS customers.

The system runs on the EMUS proprietary CAN communication protocol using a special item for efficient CAN traffic distribution called “CAN filter”. The CAN filter keeps internal CAN traffic from broadcasting into external traffic to make a stable and reliable system.

EMUS G1 Master/Slave system features: