5.
Tighten and torque the upper nuts as detailed in section 1.6.2, table 1
6. Inspect visually harnesses with temperature switches, thermistors,
thermocouples, and for loose wiring, cracks, dents, connector pins
in place and any damages.
Any damage found, record defect and replace in accordance with
Repair Task 10.4.
7. Measure the insulation resistance with a MΩ-meter at 250 V DC
between the + pin of the battery connector and the battery case.
Requirement: ≥0.5MΩ
If R ≤ 0.5 MΩ, continue at Task 7.3 step 12 (Annual maintenance).
8. Measure and record cell voltages.
9.
Mark cells with voltages lower than 1.2V (as possible defective cells).
10. Undo the vents and keep them aside on the cells mouth.
ATTENTION
Do not top up the cells with water at this stage.
11. Connect the battery to the charge / discharge unit.
ATTENTION
Do not use mercury thermometer.
12. Check the battery temperature; Requirement: below 35°C.
Soak the battery to ambient room temperature,
13. Discharge the 24 V battery at I
1
to 20 V. (pay particular attention to
previously marked cell(s) in step 8/9).
Requirement: The voltage of each cell after 48 minutes must be equal
/ greater than 1.0V.
Note: If the discharge at the I
1
rate is not feasible, select a different
rate and criteria from the table 7 below.
Record the cell voltages at the corresponding time indicated in column
2 in the log book.
If the requirement is not met, then continue with Task 8.1,
“Reconditioning.”
14. Soak the battery to room temperature for up to 8 hours before
recharging.
24
Discharge current rate Time (min) cell voltage
reading
Voltage requirement
for cells (V)
0.2*I
1
240 ≥1.0
0.4*I
1
120 ≥1.0
0.6*I
1
80 ≥1.0
0.8*I
1
60 ≥1.0
I
1
48 ≥1.0
The document reference is online, please check the correspondence between the online documentation and the printed version.
To Next Page
Loading...
Need help?
General
