Page 431 - Battery Reference Book

40/4 Metal-air batteries
Carbonaire range of batteries covering the following these, together with the 1.25 V, 2800 Ah (type Y), can
applications: short lights of all types (either flashed or be used in various combinations to produce a variety
continuously burned) such as reef lights and lights on of battery voltages, as shown in Table 40.1.
fixed structures, offshore lights on oil platforms, fog
horns, bell strikers, range lights, lights on barges under
tow, bridge lights, pier and dock lights, obstruction Table 40.1 Voltage classification chart for Carbonaire batteries
lights, fish net marker lights, buoys (two standard types
of 12 V disposable buoy battery packs, with capacities Voltage Types and number of Carbonaires
of 1100 and 3300 Ah are available), portable warning required recommended
lamps. (VI
One outstanding advantage of Carbonaire batteries
is that they may be activated with seawater. In nav- 2.5 1 x 2-S-J-I or 2 x type Y
igation aid services, this means that batteries can be 3.75 1 x 3-S-J-I or 3 x type Y
transported dry to the location. The weight to be trans- 6.0 1 x 2-S-J-I, 1 x 3-S-J-I or 5 x type Y
ported is thus reduced to a minimum and the possibility 10.0 4 x 2-S-J-I or 8 x type Y
of spillage of battery electrolyte in transit is completely 12.0 2 x 2-S-J-I, 2 x 3-S-J-I, 5 x 2-S-J-I or 10 x type Y
eliminated.
In addition to this practical feature, the most desir-
able type of primary battery for navigation aids is one
that combines large capacity with a minimum amount Some of the recommended applications of the range
of labour required for setting up and replacing. While of zinc-air depolarized batteries (saline and alkaline
each of these advantages has been available previously electrolyte types) are illustrated in Tables 40.2 and
in separate types of primary batteries, the Carbonaire 40.3.
is the first battery to combine them.
With available capacities of up to 2800Ah, only
infrequent battery renewals are required. The result 40.2 Zinc-air secondary batteries
is a substantial saving in time and money, especially
where the navigation aids are installed at remote, iso- Three companies have been working on electric vehicle
lated or hard-to-reach locations. Another very pertinent applications for this type of battery including CGE
operating characteristic of Carbonaire batteries is their (France), AER Energy Resources (US) and Electric
narrow voltage range, which eliminates the necessity Fuel Ltd (Israel). Practical energy densities in the range
for adding or subtracting cells in an installation at any 90-200Whflcg-' have been achieved to date. Elec-
time during the service life of the battery. tric Fuel Ltd are working on a system in which the
McGraw Edison produce a 2.5 V, 1OOOAh (type 2- whole battery assembly is removed from the vehicle
S-J-I) and a 3.75 V, 1OOOA h (type 3-S-J-I) battery and and replaced at 'filling stations'.

Table 40.2 Saline zinc-air depolarized batteries supplied by SAFT
Type Rated Open- End-point Average Applications
capacity circuit voltage current
(A h) voltage (VI (A)
W)
AD 517-4 1000 1.45 0.8 0.80 Meteorology, railway signalling, marine navigation
AD 517 270 1.45 0.8 0.20 Railway signalling, telephone circuits, marine
navigation, clocks
AD 524 145 1.45 0.8 0.10 Motorway emergency telephones, telephone circuits,
clocks
AR 40 85 1.45 0.8 0.10 Telephone circuits, telecommunications, railway
signalling
AD 538 80 1.45 0.8 0.09 Lift alarms, warning lamps, railway signalling
AD 539 45 1.45 0.8 0.04 Railway signalling
AD 542 25 1.45 0.8 0.025 Master clocks, railway signalling, measuring
instrnments
ADH 121 6 1.45 0.8 0.01 Security systems, clocks
AD2-519 130 2.90 1.6 0.10 Telephone circuits, railway signalling
AD2-522 70 2.90 1.6 0.08 Warning lamps