Charging With "Expert" Charging Characteristic - Bosch BAT 490 Manual Original

en 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.
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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