1 INTRODUCTION
Rechargeable accumulator batteries as installed should meet the general
requirements set out in regulation IV/13 of SOLAS 1974, as amended, and in resolution A.694(17), as applicable and should also comply with the following
requirements.
2 GENERAL
2.1 Any type or construction of batteries (e.g. lead acid, alkaline, maintenance free,
traction, semi-traction, etc.) may be used as reserve source or sources of energy,
taking into consideration the environmental conditions of the location where they are
installed.
2.2 The capacity of the battery should be sufficient for the load determined in
accordance with the annex, paragraph 2.4.
For guidance, the nominal battery capacity to comply with the minimum
capacity requirements at all times is 1.4 times the load determined in paragraph 2.4
multiplied by the intended period of operation (1 hour or 6 hours in accordance with
SOLAS IV/13.2).
2.3 The battery should maintain its rated capacity when inclined at any angle
up to 22½° in any orientation.
3 INSTRUCTIONS FOR RECHARGEABLE BATTERIES
3.1 An instruction manual which contains all necessary specifications of the batteries
should be available on board. The information should include at least:
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.1 capacity and temperature range within which the stated capacity is maintained
for the specified operation period i.e. 1 hour or 6 hours;
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.2 charging voltage and current limits in order to keep batteries fully charged
while preventing overcharging;
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.3 actual specific gravity of the electrolyte and/or cell voltages or the voltage
of the fully charged battery;
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.4 guidelines on how to carry out a controlled discharge test;
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.5 methods of determining the condition of charge of the battery,
e.g. check of specific gravity of electrolyte (acid density) or check of battery
cell voltages/battery voltages byusing an accurate measuring instrument in
accordance with the battery manufacturer's specifications;
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.6 requirement for ventilation; and
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.7 requirements for maintenance.
4 MARKINGS
4.1 The batteries should be properly marked with type or construction, rated
capacity (capacity for 1 hour discharge C1 and capacity for 5 hours discharge
C5), and installation date. The marking must be visible after the
batteries have been installed and during their lifetime.
4.2 A label warning of explosion danger should be displayed near the installed
batteries.
5 INSTALLATION
5.1 When defining the minimum required battery capacity, consideration should be given to
the expected extreme temperatures for the location of the battery and reduction of its
capacity during its lifetime in addition to the loads which are to be connected to
it.
5.2 The temperature range of the battery should be wider than the expected temperature
range of the location where the battery is to be installed.
5.3 Equipment requiring lower voltage than the total voltage of the battery bank should
not be connected to a part of the battery bank.
5.4 The batteries should be installed in an elevated position in the ship and as close to
the radio equipment as possible.
5.5 An outdoor located battery case should be avoided due to considerable temperature
variations.
5.6 Batteries of different types, different cell constructions, different capacities or
different manufacturers should not be mixed in a battery bank.
5.7 Batteries of different types and different cell construction should not be installed
in the same location if they can affect each other.
5.8 Sufficient ventilation for the battery should be provided, as required by the battery
manufacturer.
5.9 Electrical installations including battery chargers, located in the battery room
should be intrinsically safe.
5.10 Sufficient space between batteries and battery banks should be provided for carrying
out inspections and maintenance. The batteries should be well braced to remain firmly
fixed under all sea conditions.
5.11 The cabling from the batteries should be protected against earth- and short-circuits
and be appropriately fused and installed according to recognized international
standardsfootnote. Battery cables should have sufficient dimensions to
prevent voltage reduction at peak current consumption.