DISCOVER Tubular Gel OPzV Посібник з експлуатації - Сторінка 8
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Друкувати сторінкуcurrent has dropped to this value during absorption phase and limit the voltage to 2.65V per Cell. The balance phase
should last max 1-4 hours. The battery should be considered fully charged when the individual cell voltages have not
risen for a period of 1 hours or the inverter/charger adjust to float voltage.
4.2.4 Charging with a Solar Charge Controller
The charge voltage should be set as shown in the table below multiplied number of cells in series.
Constant Voltage Controller - One Step
Constant Voltage Controller - Two Step
In Stand-alone systems, the renewable source shall be sufficiently oversized against the application load in order to
avoid excessive cycling beyond design limits which may limit the battery's life expectancy.
4.2.5 Float Charge/Operation (Stand-by use)
The following is characteristic for this operating mode:
•
Consumers, direct current source and battery are connected in parallel
•
The charge voltage is the operating voltage of the battery and the system voltage at the same time
•
The direct current source is not able to supply the maximum load current at all times. The current
intermittently exceeds the nominal current of the direct current source. During this period the battery supplies
power.
Float charging is used to keep the batteries in a fully charged state after IU or IUI characteristic. The charge voltage
should be set at (see table below) multiplied number of cells in series
4.2.6 Balancing charge
To avoid permanent capacity loss and acid stratification in cycling operation the goal is to achieve a complete recharge
(100% SoC) after every discharge. Capacity loss and acid stratification will threaten the battery's state of health.
In Stand-alone Systems this is not always possible as in Stand- alone applications where the RE source depends on the
weather conditions causing the load to exceed the designed limitations.
For Hybrid Systems with diesel generators/grid the charging source is always available but the boost charging time is
restricted to favor a more efficient utilization of the diesel.
The less complete the daily recharge is, the more frequently a balance charge will be required to protect the battery
from sulphation and lagging cells. When short charging times are used then balance charges are required at frequent
intervals, preferably every month.
8
Voltage limit: 2.35 V/Cell at 20°C/(68°F)
Bulk/Absorption
Constant current limit: 20A per 100Ah C10 rating
Voltage limit: 2.65 V/Cell at 20°C/(68°F)
Balance
Constant current limit: 1.2 per 100Ah C10 rating
Time limit: 1-4 hours
Float
Constant voltage limit: 2.25 V/Cell at 20°C/(68°F)
On-Off Controller
Constant voltage limit: 2.25 V/Cell at 20°C/(68°F)
Float
Constant current limit: 20A per 100Ah C10 rating
High Disconnect Voltage: 2.40V/Cell at 20°C/(68°F)
Low Restart Voltage: 2.25 V/Cell at 20°C/(68°F)
Regulation Voltage:2.35V/Cell at 20°C/(68°F)
Time limit: max 24 hours
Bulk/Absorption Voltage 2.40 V/Cell at 20°C/(68°F)
Float Voltage: 2.25 V/Cell at 20°C/(68°F)
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