Lead-Acid (Pb) Charge Programs - GRAUPNER 6442 Instructions D'utilisation

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
L i t h i u m t y p e
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
L i P o
+
-
INC DEC
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
* * * L i P o c e l l s * * *
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
2 c e l l s (
+
-
INC
DEC
Caution ! Please take great care to
!
set the correct cell count. If you make
a mistake, the battery could explode
and burst into flames !
This program is designed for charging and discharging lead / sulphuric acid and lead / gel
batteries with nominal voltages of exactly 2, 4, 6, 12 and 24 V (1, 2, 3, 6 and 12 cells).
Caution: the charger will not recognize lead-acid batteries with other nominal voltages, and
such batteries must not be connected to it.
Lead-acid batteries behave entirely differently to Ni-Cd and Ni-MH batteries. Lead-acid batteries
can only deliver relatively low currents relative to their capacity, and similar restrictions very
definitely apply to charging. Manufacturers usually state 14 to 16 hours for achieving nominal
capacity when recharging at the normal charge current. The „normal" charge current is defined
as one tenth of the battery's nominal capacity. Example: battery capacity = 12 Ah —> normal
charge current = 1.2 A. In contrast to Ni-Cd and Ni-MH batteries, lead-acid chargers generally
monitor the battery's voltage in order to determine when it is fully charged.
Caution: lead-acid batteries cannot and must not be fast-charged! Always select the
charge current which the battery manufacturer recommends. Please also bear in mind that
the nominal capacity (i.e. useful life) of a lead-acid battery is very quickly compromised by
incorrect handling, including overcharging, repeated 100% discharges and, in particular, deep
discharging. The magnitude of the charge / discharge currents is also crucial to the actual
battery capacity which can be exploited, i.e. the higher the current, the lower the capacity which
the battery can deliver.
The values selected in the user settings for charge termination delay and safety timer have no
effect in the Pb charge programs.
28
Lithium type select program
This is actually the most important set-up program for
Lithium batteries. In the Select program you enter the
battery type and battery capacity. It is vital to enter this
information with the greatest care. Check it very thoroughly,
as the charger derives all the other charge parameters from
the settings you enter here.The battery type you select (Li-
Po or Li-Io or
voltage. If you find that a Lithium battery has unexpectedly
been charged only to the 2/3 full mark, you have probably
set the incorrect battery type at this point.Caution: if you set
an incorrect value at this point, the battery may be damaged
irreparably, and could even explode!
Lithium cell count
When you have connected the battery to the charger, hold
the START button pressed in for about two seconds and
the screen will display the cell count of the Lithium pack. If
7 . 7 3 V )
the pack contains 1 or 2 cells, the charger detects and
sets the number of cells fully automatically. If the pack
contains more than two cells, you may have to adjust the
cell count manually using the INC / DEC buttons, as the
automatic circuit is unable to detect more than three cells
reliably. On the right-hand side you will see the voltage of
the pack connected to the charger. Pressing the START
button again initiates the charge process.
14. Pb (lead-acid) programs
Pb
MANUAL-
program
LiFePO
) affects the charge termination
4
Pb
MODE MODE
discharge
program