BMW 3: Electrical connections
The high-voltage battery unit also has a signal connection, as well as the high-voltage connection.
The high-voltage battery unit is integrated in the refrigerant circuit in order for it to be cooled.
Connections of the SP41 high-voltage battery
- Venting unit
- Signal connector
- Connections for refrigerant lines
- High-voltage connection
The electrical lines (high-voltage and signal connection), as well as the refrigerant lines, can be disconnected without having to remove the high-voltage battery unit.
Low-voltage connection
There is a signal connection on the left side of the high-voltage battery unit of the G20 PHEV. The control units integrated in the high-voltage battery unit are supplied with voltage, data bus, sensor and monitoring signals via this interface.
The signal connection has the following lines:
- Voltage supply of the SME control unit with terminal 30 and terminal 31
- Terminal 30C (crash signal) for voltage supply of the electromechanical switch contactors
- Wake-up line from the Body Domain Controller (BDC)
- Input and output of the signal line for the high-voltage interlock loop
- Output (+12 V and ground) for the actuation of the combined expansion and shutoff valve as part of the refrigerant circuit
- K-CAN5.
High-voltage connection
There is a 2-pin flat high-voltage connection at the high-voltage battery unit with which the high- voltage battery unit is connected to the EME.
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Cooling system
To increase the service life of the high-voltage battery unit and obtain the
greatest possible power, it
is operated in a defined temperature range. The high-voltage battery unit is
essentially oper
Overview
G20 PHEV, system overview of climate control - Installation locations
Combined expansion and shutoff valve at the evaporator
Combined expansion and shutoff valve at the high-voltage battery u
Functions
The cooling system has 2 operating conditions, which result from its
function:
Cooling OFF
Cooling ON
Cooling OFF operating condition
The "Cooling OFF" operating condition is active when the cell
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Service information
Electronic emergency gearbox release
As with the conventional 8-speed automatic transmission, the GA8P75HZ also
has an electrical
emergency release option.
In conventional vehicles the starter motor rotates for this, and also drives the
mechanical transmission
oil pump via the torque converter. W
Speed Limit Info
Speed Limit Info
Concept
Speed Limit Info shows the currently valid speed
limit in the instrument cluster and, if necessary,
the Head-up Display.
General information
The camera in the area of the interior mirror detects
traffic signs at the edge of the road as well
as variable overhead sign posts.
