Exide Technologies Section 92.61 - Manual (Page 21)

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9.8 Cell Numerals
A set of pressure sensitive cell numerals and system polarity
labels are supplied and should be applied at this time.
Cell numerals should be applied to the top of the module and
as close to the cell being identified as possible. Suggest appli-
cation to cell restraint bars or to module channels. Designate
the positive terminal cell as #1 with succeeding cells in series
in ascending order.
The system polarity labels should be applied next to the posi-
tive and negative terminals.
9.9 Warning Label
Apply pressure sensitive warning label provided on a promi-
nently visible module side or end (The module cover is rec-
ommended).
9.10 Battery Nameplate
For future reference and warranty protection, apply pressure
sensitive nameplate on a prominently visible module. Fill in
date of installation and the specified capacity and rate.
Make sure surfaces are free of dirt and grease by wiping with
clean, dry wipers to ensure proper label adhesion.
For protective module cover installation, see Section 10.
SECTION 10
10.0 Protective Module Covers
Each module is provided with a transparent protective cover
to help prevent accidental contact with live module electrical
connections, and to provide easy visual access to the system.
When all system assembly has been completed, as well as
initial testing including initial charge and cell float voltage
readings, all covers should be installed. Covers should remain
in place at all times during normal operation of the battery
system.
10.1 Module Cover Installation
Refer to Figure 24 for installation of the transparent Module
Covers. Install standoff legs and standoff keys first, as
shown.
The cover is then installed by grasping it so that the GNB logo
is upright. Locate slots at the bottom of cover to the bottom
standoff legs and slide in place. Locate the holes at top of
cover and install to top standoff legs.Refer to Figure 24.
SECTION 11
11.0 Initial Charge
Batteries lose some charge during shipment as well as dur-
ing the period prior to installation. A battery should be given
its initial charge at installation. Battery positive (+) terminal
should be connected to charger positive (+) terminal and bat-
tery negative (-) terminal to charger negative (-) terminal.
Failure to perform the freshening charge within the limits
stated in Section as well as failure to perform the initial
charge upon installation of the battery 4 will affect the per-
formance and life of the battery and may void the warranty.
11.1 Constant Voltage Method
Constant voltage is the only charging method allowed. Most
modern chargers are of the constant voltage type.
Determine the maximum voltage that may be applied to the
system equipment. This voltage, divided by the number of
cells connected in series, will establish the maximum volts per
cell (VPC) that is available.
Table B lists recommended voltages and charge times for the
initial charge. Select the highest voltage the system allows to
perform the initial charge in the shortest time period.
NOTE: Time periods listed in Table B are for 77°F. For other
temperatures a compensation factor of .003 V/°F (.0055 V/°C)
per cell is recommended. The minimum voltage is 2.20 VPC,
temperature correction does not apply below this voltage.
TEMPERATURE CORRECTION
V corrected = V25°C - (( T actual-25°C) x ( .0055V/°C)) or
V corrected = V77°F - ((T actual-77°F) x (.003V/°F))
See Appendix A for standard values.
STEP 1
A. Set constant voltage charger to maximum setting without
exceeding 2.35 VPC. Example: For a target charge of
2.35 VPC on a 24-cell system, you would set the charger
voltage to 56.4 volts.
Depending on the battery’s state of charge, the charger
may go into current limit at the beginning and decline
slowly once the target charge voltage is reached.
B. Record time and current at regular intervals – every hour
as a minimum.
C. Continue charging the battery until there is no further drop
in charge current over 3 consecutive hours. This could
take days if the battery has been in storage for a long time.
D. When the current has stabilized, proceed to step 2.
STEP 2
A. Continue the charge for the time listed in Table B
depending on the charger voltage setting. The time is IN
ADDITION to the time spent charging in Step 1. Example,
charge for 12 hours if the charger voltage is set to 2.35
VPC.
TABLE B
INITIAL CHARGE (77°F)
CELL VOLTS TIME-HRS (Minimum)
2.30 24
2.35 12
B. Record cell voltages hourly during the last 3 hours of the
charge time. If, after the charge time has completed, but
the lowest cell voltage has continued to rise, you may
extend the charge, monitoring cell voltages hourly, until the
lowest cell voltage ceases to rise.
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