Maserati Levante 2021 Owner's Manual page 17

6 48 V/12 V DC/DC converter on the
48 V battery.
7 Fan battery cooling.
8 Cooling ducts.
9 Air intake grill.
The 48 V battery containing twelve
lithium ion cells that needs no
maintenance. The battery housing
also contains a battery control and
supervision unit, a relay, a fuse, a
shunt resistor, two temperature
sensors and a pressure balancing unit.
The main functions of the battery
system are to store the electrical
energy supplied by the 48 V power
supply during braking and returns it
to the system when the electric motor
starts operating parallel to the thermal
engine.
During its operation, the 48 V battery
can develop heat which is dissipated
using a fan and a series of ducts. The
fan sucks the air from the left side of
the boot compartment through a air
intake grill then directs it through
ducts to the battery. To ensure the
cooling of the 48 V battery it is
important that the air intake remains
free as indicated by the indicated
label.
WARNING!
Do not cover, close or throw objects
inside the air intake grill on the left
side of the boot compartment with a
plug/stopper. The battery system must
be able to breath at any time.
The BSG is driven by the crankshaft by
means of a belt and is at the same
time able to perform the function of
current generator and that of electric
motor, also with the function of
starter motor for the thermal engine
in some situations such as in the
phases Start&Stop. In the latter case,
after stopping the car in a stop and
automatic engine shutdown with the
Start&Stop system, re-ignition occurs
through the BSG. The traditional
starter motor is used only for the first
ignition of the car, when you have
power from the 12 V battery, which is
Understanding the Vehicle
certainly charged, and more power is
needed.
When acting as an electric motor,
the mild hybrid system provides
additional power to the thermal
engine at start-up, when starting from
a standstill or when there is a demand
for greater drive torque, or in the
most demanding moments in terms of
consumption and emissions.
Based on the information from
the on-board sensors, the hybrid
system ECU decides when it is more
convenient recover energy such as
when a vehicle precedes, a phase in
which the system slows down the car
with the BSG generating energy to be
stored in the 48 V battery or to power
the car's services.
In certain driving conditions, the
hybrid system ECU also regulates
energy flows taking into account the
charge level of the 48 V battery. This
management is optimal especially
when using some ADAS systems
because the energy recovery start
automatically even when a vehicle is
detected in front of the car, slowing
down the vehicle with the activation
of the BSG.
The eBooster is used to support the
main turbocharger and improve
vehicle acceleration and driveability.
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