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2� | BA� 4�� | Operation
7. Set the capacity of the connected battery
with
or
.
8. Press
.
The green LED flashes rapidly (Fig. 1, Pos. 4).
The battery is charged.
I1
U
1
23Ah charged
2
13,47V
20,0A
3
Standard charging
4
12V
100Ah
Fig. 5:
Standard charging
1 Charging progress (refer to charging characteristic Fig. 4)
2 Charging current supplied so far
3 Current battery charge
4 Information on mode, battery voltage and battery capacity
i
For exhausted batteries, the BAT 490 initially em-
ploys soft charging. The charging current level is
governed by the battery capacity setting. The mes-
sage "
Soft charge
" appears on the display and the
green and yellow LEDs flash at 1-second intervals.
9. Charging is stopped with
charging clips.
The green LED is off.
The menu "Modes" is displayed (only with batte-
ry connected).
i
If charging is interrupted, the process must be
re-started.
10. Switch off the BAT 490 on completion of charging.
11. Remove the charging clips from the battery.
i
In the case of cyclical battery operation
(wheelchairs, sweepers, ...), at least every 3rd char-
ging process should take the form of full charging to
maintain the battery capacity as long as possible.
|
1 689 989 068
2012-10-30
I2
aI3
or by disconnecting the
4.4.2
Charging with "Expert" charging characteristic
!
Incorrect parameter values (excessively high valu-
es for I or U1 and an insufficient value for "o") may
destroy the battery.
I
U
t1
t2
Fig. 6:
"Expert" charging characteristic
I, U
, U
and "o" :
Governed by the set value,
1
2
refer to "Configuration >> Parameters"
in Section 5.1
Phase 1 (t1):
Main charging, green LED flashes
rapidly
The battey is charged at a constant charging current I
until the voltage U1 is attained.
Phase 2 (t2):
Main charging, green LED flashes
rapidly or slowly
The charging voltage U1 is kept constant and the char-
ging current decreases with increasing battery charge.
The green LED flashes rapidly until the current limit
value "o" is attained.
i
In rare cases the limit value "o" is attained in less
than 30 minutes and the green LED flashes slowly
until the end of the 30 minute period.
Phase � (t�):
�rickle charging, green LED lights
Trickle charging commences on completion of the mini-
mum 30 minute period and when the current limit value
"o" is attained or undershot. The BAT 490 sets the bat-
tery voltage U
. The charging current I is governed by
2
the capacity of the battery to be charged and the time
profile.
i
The battery need not be disconnected from the
vehicle electrical system during charging. Charging
takes place as described in Section 4.4.2.
I
U
1
U
2
o
t
t3
Robert Bosch GmbH
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