Maintenance
Manual_Grid_Power_FNC_en_V3_0
50
8. 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 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.
9. Allow the battery system to rest for at least 2 hours.
10. 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 and
measure the time elapsed. This is the capacity test.
Note
If the battery system takes 5 hours to drop 1.0 V per grid|power FNC® cell its capacity is 100 %:
5 hours -> 100 %
4 hours -> 80 %
3 hours -> 60 %
…
11. Allow the battery system to rest for at least 8 hours, preferably overnight.
If the discharge time is ≤ 4.5 hours, repeat the process from point 8.
Note
If the discharge time is still ≤ 4.5 hours after 5 repetitions of this procedure, contact HOPPECKE
service.
12. 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 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.
13. Allow the battery system to rest for at least 8 hours, preferably overnight.
