2
.
Product Description
English 8/2020. Rev 0.3
7
2.1.2
SMU (String Management Unit)
SMU collects all information about the battery system and controls the battery system by switching the main
power line and controls each Battery Module by cell balancing. SMU calculates the state-of-charge (SOC) and state-
of-health (SOH) of the battery system. Key components in the SMU are Rack BMS, MCCB, and shunt resistor. Rack
BMS is the main controller that takes all data from the Module BMS, measures the string voltage and current,
determines the state of the battery and controls the MCCB accordingly.
UL: V049-0011AA
Figure 2-3: SMU
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