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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Switching on/off and interrupting
cruise control
With steering and traffic jam
assistant: Assisted Driving
General information
This button is used to switch the
configured
function on and off.
The button can be used to set the
primarily
used function.
Set function
1. When the system is active,
press the
button repeatedly until the desired funct
Recirculated-air mode
Concept
You may react to unpleasant odors or pollutants
in the immediate environment by temporarily
suspending the supply of outside air. The system
then recirculates the air flow within the vehicle.
Operation
Press the button.
The LED is illuminated when recirculated-
air mode is switched on. The
