EPS BC 800 R Series, Instruction Manual

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© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
Instruction Manual
BC 800 R Series
Date: 02-09-2012
3. Functional description
3.1 Battery types
The battery chargers can be used to charge different
types of lead batteries, as for example lead-acid, gel
cell or AGM type. Any of the battery types are charged
according to a three-stage, temperature compensating
(only with temperature sensor connected) charging
procedure. The battery type can be selected by a push-
button on the front panel. The related charging profiles
mainly differ in the cell voltage (see table below).
3.2 Charging procedure
Attention! Defective batteries (U
BatAct
= <0.4 x U
BatNom
)
can not be charged!
The charging procedure follows an I-U-U characteri-
stics.
In the first phase of the charging the battery is
precharged with reduced output current (0.1 x I
Nom
).
The precharge is very effective on deeply discharged
batteries with U
BatAct
= >0.4 x U
BatNom
, providing the
possibility to repair and recharge them again. As soon
as the output voltage rises to 0.9 x U
BatNom
or after a
maximum precharge time of 30 minutes , the procedure
changes to
normal charge
phase. Precharge and nor-
mal charge are indicated by the red LED of the traffic
light type display.
During normal charge, the battery is charged with full
output current I
Nom
(or with a reduced to 30% output
current I-Limit).
After leaving the constant current charging or after a
maximum 6 hours charging time, the charging proce-
dure changes to boost charge (yellow LED).
Boost charge is done with increased charging voltage.
As soon as the charging current becomes <5% of I
Nom
or the boost charge phase time exceeds 1.5 times the
time of the normal charge phase, the charging proce-
dure changes to trickle charge .
When reached and if the charging current remains
below 5% I
Nom
, the battery is indicated as fully charged
by the green status LED.
During trickle charge, the battery is kept charged with
trickle charge voltage for an unlimited time, unless char-
ging is stopped or interrupted by any error or blackout.
Boost charge and trickle charge make use the tem-
perature compensation, which is recommend in order
to prevent the batteries from gassing.
Tip:
it is possible to manually reduce the output current
by activating the 30% I-Limit. This is done by pressing
the pushbutton „Charging Profiles“ longer than 3s.
The I-Limit is useful when charging small batteries that
require lower charging currents.
3.2.1 Charging characteristics
3.3 Battery supervision
The battery or batteries are connected to the desi-
gnated terminal „Battery“ on the front. The output is
supervised for false polarity and wrong battery voltage.
In case the battery was connected with false polarity,
the battery voltage is too low or too high, the charging
is inhibited to start.
Attention!
Only connect batteries whose battery volta-
ge matches the nominal charging voltage of the device.
Else the battery and/or the device might get damaged.
3.4 Temperature sensor
It is recommended to use temperature compensation
when charging batteries, in order to prevent dangerous
gassing.
Without the temperature sensor the batteries are
charged with voltages that correspond to an ambient
temperature of 25°C. The sensor is directly connected
to pins 1 and 6 of the analogue interface and has to
be placed in proximity of the battery or attached to the
battery. It is detected and used when the charging is
started. If the device measures temperatures above
+50°C, the charging is paused After cooling down to
<+45°C, the charging is automatically continued. This
only works if the temperature sensor is attached. The
error LED will only flash as long the battery overtem-
perature error persists.
At temperatures below -15°C, the temperature com-
pensation will halt. In case the sensor is removed
during charging or if damaged, the device continues
the charging procedure with a charge phase voltage
corresponding to 25°C.
Functional description