BELATRON compact charging systems switch mode technology ...

BENNING World Class Charging Systems
BELATRON compact charging systems
switch mode technology from BENNING
Charging characteristics
BELATRON compact
The BELATRON compact charging curve is a WUIa characteristics
(see picture 1), i.e. when the gassing voltage is
reached, the recharge is driven with a falling current. This
takes advantage of the fact, that the battery can accept a
very high amount of energy until the gassing voltage is
reached. When the gassing voltage is reached, the charge
is driven by a constant voltage phase.
The voltage is kept constant until the charging current equals
the limited end of charge current. During this phase again the
current is kept constant until shut-off.
After the recharge, an equalisation charge is provided
automatically. This ensures in case of insufficient recharge
or deep discharges the maximum capacity and life expectancy
of the battery. For On-board applications and parallel
operation the BELATRON compact range provides a WUoU
characteristics.
BELATRON compact chargers offer innovate pulse characteristics
providing reduced recharge times. High current pulses
induce the mixing of the electrolyte at the end of the final
charging phase (see picture 2). The reduced charging factor
contributes not only to a shorter recharge time, but reduces
the energy consumption as well.
U
V/C
I
[%]
U
V/C
I
[%]
U
I
Fig. 1: Voltage - current curves for WUIa characteristic Fig. 2: Pulse characteristic IPuls UPuls
dBuV
70
60
50
40
30
20
10
0
Electromagnetic compatibility (EMC)
– a standard for product quality
Due to the high technical demands on the BELATRON compact,
the power electronics meet all relevant European norms
for EMC and mains pollution. A measure for the compatibility
is the power factor cos ϕ. A typical value for compatible
single-phase systems is 0.99. Therefore the efficiency of the
unit results in a value of about 90 %.
0.15 1 10 30 MHz
Examination of limits according to EN 55014
The mains input meets the limits
of the EN 61000-3-2 (see lower
curve). This EN standard limits
the allowed values of undesired
harmonics fed back to the public
network. This could lead to malfunction
of devices connected to
the same network.
BELATRON compact charging systems provide a ripple free
charging current which leads to a more modest temperature
raise during the recharge of about 30 % compared to conventional
chargers. According to the considerations of the
ZVEI this results in a prolongation of the battery life expectancy
of 10 %.
On-board version
The BELATRON compact range is suitable for On-board
applications due to the low volume and weight. For this
application a separate range is available.
These chargers are shock and vibration
proof. Short circuits and malfunction possibly
caused by moisture condensation on the
PCB’s are avoided by PCB coating.
A drive off protection is installed in all
On-board versions. This relay contact could
easily be connected into the truck control
system.
Features of the On-board versions:
• Shock- and vibration proof design
• PCB coating
• Drive off protection
• Easy installation in the truck