Combustion engine running
Coupled driving and charging
The route planned by the driver may require that the
combustion engine drives the vehicle and, at the
same time, the surplus power is used to charge the
high-voltage battery.
Electric motor 2 runs as an alternator
lk
High-voltage
battery
is charged
Electric motor 1 functions as the drive
Combustion engine off
Regenerative braking
Both electric motors can be used for regenerative
braking when the clutch is engaged. The energy from
the deceleration of the vehicle can be converted into
a direct voltage by the two power electronics units
and immediately stored in the high-voltage battery.
Electric motor 2 runs as an alternator
High-voltage
battery
is charged
Electric motor 1 runs as an alternator
Charging
contact
External charging
The high-voltage system is in stand-by mode during
the charging process from an external source.
The electric motors and power electronics are
deactivated. The charging cable is connected to the
vehicle via the charging contact. When a source of
electricity for charging the high-voltage battery is
recognised by the control unit, two charge protection
relays are closed.
Electric motor 2 off
High-voltage
battery
is charged
Electric motor 1 off
s499_226
The charging process is started. The charging process
is stopped once the required capacity has been
reached. Electrical consumers that are activated
during the charging process are powered by the
external charging source.
35
th
English 