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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Introduction
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
Overview of charging options
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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System overview
G20 PHEV, components of refrigerant circuit
Combined expansion and shutoff valve (interior)
Combined expansion and shutoff valve (high-voltage battery unit)
High-voltage battery unit
Refrigerant lines to high-voltage battery unit
Low-pressure connection (for drawing off, evacuating and f
What must be observed when charging the high-voltage battery unit?
It is not permitted to simultaneously charge the high-voltage battery
unit and fill the fuel tank
When the charging cable is connected, do not fill the fuel tank and keep a safe
distance from highly
flammable materials. Otherwise, in the event of an improper connection or if the
charging cable
