SECTION 7 |
General Information on Lead
Acid Batteries
27
connected in parallel to form a battery bank of 12V with a capacity of 400 Ah.
The four Positive terminals of Batteries 1 to 4 are paralleled (connected together)
and this common Positive connection becomes the Positive terminal of the 12V bank.
Similarly, the four Negative terminals of Batteries 1 to 4 are paralleled (connected
together) and this common Negative connection becomes the Negative terminal of
the 12V battery bank.
7.15.3 Series – Parallel Connection
6V
6V
6V
6V
12V String 1
12V String 2
Battery 1
Battery 3
Battery 2
Battery 4
12V Inverter
or 12V Charger
Cable “A”
Cable “B”
Fig. 7.4: Series-Parallel Connection.
Figure 7.4 shows a series – parallel connection consisting of four 6V, 200 Ah batteries
to form a 12V, 400 Ah battery bank. Two 6V, 200 Ah batteries, Batteries 1 and 2 are
connected in series to form a 12V, 200 Ah battery (String 1). Similarly, two 6V,
200 Ah batteries, batteries 3 and 4 are connected in series to form a 12V, 200 Ah
battery (String 2). These two 12V, 200 Ah Strings 1 and 2 are connected in parallel
to form a 12V, 400 Ah bank.
CAUTION!
When 2 or more batteries / battery strings are connected in parallel and are
!
then connected to an inverter or charger (See figs 7.3 and 7.4), attention
should be paid to the manner in which the charger / inverter is connected
to the battery bank. Please ensure that if the Positive output cable of the
battery charger / inverter (Cable “A”) is connected to the Positive battery
post of the first battery (Battery 1 in fig 7.3) or to the Positive battery
post of the first battery string (Battery 1 of String 1 in fig. 7.4), then the
Negative output cable of the battery charger / inverter (Cable “B”) should
be connected to the Negative battery post of the last battery (Battery 4 as
in fig. 7.3) or to the Negative Post of the last battery string (battery 4 of
battery String 2 as in fig. 7.4). This connection ensures the following:
