BMW 3: Introduction
Although the high-voltage battery unit of the G20 PHEV can also be partially
charged by energy
recovery via the electrical machine, the "normal" charging procedure takes place
when the G20 PHEV
is connected to the AC voltage network of the local power supply company. Energy
is taken from the
alternating current voltage network and fed to the direct current voltage
high-voltage electrical system.
To allow this to happen, the G20 PHEV can be connected to an AC charge station
or charged via the
charging cable.
The charging procedure is never carried out with the maximum possible charge
current. At the start,
charging takes place with constant current. Switchover to constant voltage takes
place towards
the end. The actual charging time is increased as a result, and the service life
of the battery cells is
extended.
If the G20 PHEV is connected to an AC charging station, the maximum possible
charging power of
approximately 3.7 kW is also available (provided the AC charging station is
designed for this).
System wiring diagram

System wiring diagram for AC charging with 3.7 kW
- Electric A/C compressor (EKK)
- Electrical Heating (EH)
- Electric motor
- Electric Motor Electronics (EME)
- Battery management electronics (SME)
- High-voltage battery unit
- Convenience charging electronics (KLE)
- Drive, connector fastener
- Drive, charging socket cover
- Charging socket cover sensor
- Locator and status lighting
- Charging socket at the vehicle
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The "charging" procedure for an electric vehicle corresponds to "refuelling"
a conventionally driven
vehicle. Accordingly, in this chapter "charging" means:
Charging the high-voltage battery unit d
The high-voltage battery unit of the G20 PHEV can generally only be charged
by alternating current
(AC charging) at a maximum charging power of 3.7 kW. The charging option for the
high-vol
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General information
More than one assistance function can be active
at the same time.
The following assistance functions can be manually
activated:
"Parking aid lines".
"Obstacle mark.".
"Car wash".
The following assistance functions are automatically
displayed:
Side protection.
Door openin
Owing to the fact that the air conditioning compressor in the G20 PHEV is
electrically operated and
that the high-voltage battery unit has high energy and power densities, a
stationary climate control
function is offered to the customer in the G20 PHEV. For stationary air
conditioning,