What is a master & slave battery system?

In complex battery systems, particularly those with a large number of cells, a Master and Slave configuration is often employed. This setup involves multiple BMS units where one acts as the ‘Master’ and the others as ‘Slaves’.

What is a master slave BMS?

Purpose of Master, Slave BMS. The main master BMS (or battery controller) controls elements such as battery chargers, contractors and external heating or cooling drivers. Battery state algorithms were programmed to calculate the State of charge, State of health, and power capability.

What does a Master BMS do?

The main master BMS (or battery controller) controls elements such as battery chargers, contractors and external heating or cooling drivers. Battery state algorithms were programmed to calculate the State of charge, State of health, and power capability. In other words, keep the battery operating in the defined safety window.

What is a master-slave battery management system (BMS)?

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How do BMS slaves work?

Six cells (each having a voltage range of 15 V–25.2 V) are connected in series to form a battery module and the BMS Slaves provide the balancing among the cells of the respective module. The BMS Master performs the balancing operation in the battery pack formed by the connection of three battery modules.

How BMS slave balancing a battery?

During the balancing process, BMS Slave#1 achieve the balanced condition for battery module 1 at t = t1, BMS Slave #2 achieve the balanced condition for battery module 2 at t = t2 and the BMS Slave #3 achieve the balanced condition for battery module 3 at t = t3.