As the global ESS market expands, technologies that enhance battery safety and its operational efficiency are gaining significant attention. The BMS(Battery Management System)* serves as a key system that comprehensively managing the battery’s state to ensure reliable ESS operation. SAMSUNG SDI applies AI technology to BMS, resulting in strengthened safety and economic advantages of SBB(Samsung Battery Box).

* BMS is a system designed for the safe and efficient use of batteries, commonly found in devices such as ESS, electric vehicles, and power tools that utilize batteries.

In an SBB, a single system is operated where thousands of cells are incorporated in modules and racks. During operation, management at the individual cell, module, and rack levels is required to enhance the efficiency and safety of the entire SBB. The BMS monitors key data such as the voltage and temperature of cells and analyzes them to ensure the SBB is operated efficiently and safely.

[Structure of BMS in SBB: Divided into different levels of roles with Module BMS - Rack BMS - System BMS]

Managing the performance variance among battery cells is notably important. As the condition and accumulated usage of each cell change over time, SoC(State of Charge) imbalances develop during charging and discharging, which can lead to the degradation of the entire system’s efficiency.

If certain cells within a system are used more than others, the heavily used cells will finish charging first, while the others remain partially charged. This ultimately decreases the total capacity of the battery with a single charge.

To solve this problem, BMS equalizes the capacity of every cell by adjusting the charging state based on the remaining capacity of individual cells, which is called Cell Balancing.

[BMS functions cell balancing by equalizing the state of individual cells]

Recently, cell balancing technology has evolved beyond simply managing individual cell states. It’s now advancing into a new technology that analyzes changing patterns in cell performance to predict potential imbalances and address them in advance. SAMSUNG SDI applies this enhanced cell balancing technology to BMS, continuously increasing the efficiency and reliability of the SBB. 

[Adoption of AI to BMS strengthens SBB safety]

SAMSUNG SDI further moves to strengthen battery safety by applying AI technology to the BMS. It utilizes AI when analyzing real-time collected data such as temperature, SOH, SOC to predict battery lifespan and cell issues, responding to them before the issues arise.

SAMSUNG SDI will consistently develop key technologies, including the BMS, to reinforce the reliability of SBB.