BÜTTNER ELEKTRONIK – Batterie-Control-Booster MT BCB 30/30, MT BCB 40/40, MT BCB 60/40
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3. LiFePO
4
lithium-maintenance-idle mode
Enables long-term charging for LiFePO
4
batteries on mains at 50 – 80 % of the ca-
pacity, with a permanent charging voltage
of 13.20 V.
Activation takes place by pressing the push- button
(approx. 8 s)
Display: Battery full and Main Charging
LEDs are flashing alternately. Return to
normal operation (charging characteristic
previously set using the DIP switches) by
pressing the button again (approx. 8 s)
4.5. Charging on mains
The BCB starts the charging operation fully
automatically when the device is connec-
ted to 230 V mains.
Signal output “Ntz” supplies a control signal
12 V/0.1 A e.g. to generate a mains identifi-
cation signal.
Depending the installation type and device
version, charge retention of the starter
battery begins with 4 A, 5 A or 10 A.
Note
i
The devices also have a very large AC
voltage input range and even at 110 V
charging is still possible at correspondingly
reduced power (see 5. Technical specifica-
tions)!
4.6. Charging while driving
When the engine is running, the booster
draws power from the starter battery cir-
cuit in order to charge the board battery.
This withdrawal is recognized by the vehicle
charging management as consumption
and thus the alternator is signaled to con-
tinuously deliver power.
This function ensures that vehicles with a
Euro 6 alternator do not interrupt the char-
ging process.
Depending on the operating mode, with
control signal D+ or ignition key signal (ter-
minal 15), charging of the board battery
and the increase in the charging capacity
of the booster only begins when the starter
battery is sufficiently fully charged (see 5.
Technical data).
If the starter circuit is heavily loaded by
many large consumers and the starter bat-
tery voltage drops, e.g. when the engine
is idling, the charging power for the board
battery is gradually reduced in order to
relieve the starter circuit.
If the terminal 15 signal (control via ignition
key) is used, there is a possibility that the
starter battery will discharge if the ignition
is switched on by mistake (without the
engine running).
