Commissioning
Manual_Grid_Power_FNC_en_V3_0
38
Note
The individual cell voltages should not vary by more than ± 50 mV from the mean of all cell
voltages.
If the open circuit voltage of a cell is < 1.2 V, contact HOPPECKE service.
2. Remove the transport plug of each grid|power FNC
®
cell.
3. Recommended: Insert a gas venting tube on each grid|power FNC
®
cell, (HOPPECKE
material number: 4143180100).
4. Discharge the battery system by using a charging/discharging device with nominal
current I
5
, until the voltage of the battery system has dropped to 1.0 V per cell.
5. Allow the battery system to rest with disconnect load for at least 8 hours, ideally
overnight.
6. Measure the temperature of the battery system by inserting a suitable glass thermometer
through the opening of a cell.
The cell to be measured should be installed in the center of the system, in order to
capture the warmest possible location of the system.
7. Charge the battery system using a constant current of I
5
for 7.5 hours.
ATTENTION!
The battery system must not exceed a temperature of 45 °C during charging.
Once a temperature of 45 °C is reached, stop the charging process.
Make a note of the remaining charging time.
Only continue charging when the cell temperature has dropped below 25 °C.
Complete the remaining charging time of the 7.5 hours after the battery system has cooled.
Should the battery again reach a temperature of 45 °C before the charging time of 7.5 hours is
completed, interrupt the charging process again, and repeat as necessary.
8. Allow the battery system to rest for at least 4 hours.
9. Remove the gas venting tubes.
10. Thoroughly remove any contamination on the battery system with a soft, damp cloth with
water.
11. Refill the electrolyte level of each grid|power FNC
®
cell with distilled water to maximum.
12. Place the (vent/VR) plug vertically and insert it carefully to each FNC
®
cell.
13. Keep a log of your actions, see
13.1 Commissioning Record on page 54
