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Features
8.5 Battery Management
■
Backup SOC
: The minimum SOC that the battery maintains in order to supply power to the load in the case of
Off grid.
–
Battery SOC < Backup SOC (On-grid mode): Q.HOME CORE does not discharge the battery but only
performs charging operation.
■
Charge Management
: If the PV power is greater than the load power, the inverter charges the battery. If the
battery SOC reaches 100 %, the battery converter stops its operation not to be overcharged.
■
Discharge Management
: Discharge Management effectively prevents the battery from being damaged due to
overcharge. If the battery SOC (State of Charge) reaches 5 % or the Backup SOC, it limits the battery discharge.
■
Cell balancing
: If the inter-cell potential difference exceeds the threshold voltage, the PCS automatically starts
cell balancing control to prevent the battery from damage due to the potential difference among battery cells.
■
Parallel Connection
: In the Q.SAVE parallel connection, internal module relays is not connected if voltages are
different between each battery module. Then, the battery management system automatically controls charging/
discharging power of each battery to achieve the identical Q.SAVE voltage. When the voltage of each module
becomes equal, the internal relays are connected.
Q.SAVE #1
Q.SAVE #2
Battery module
Relay board
Relay board
BAT
IN
BAT
IN
BAT
OUT
BAT
OUT
Battery module
■
Power derating
: It limits the charging/discharging power on over-temperature/under-temperature to protect
the battery from overload or other potential errors. If the temperature does not drop beyond a certain period,
the BDC stops its operation.
Summary of Contents for Q.HOME CORE A5
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