BMW 3: Convenience charging electronics
The convenience charging electronics (KLE) enables communication between the
vehicle and
charging station.
Convenience charging electronics KLE
- Ventilation opening
- Low-voltage connection/signal connection
- High-voltage connection for the electrical heating
- Coolant connection (return)
- High-voltage connection electric A/C compressor
- Coolant connection (feed)
- High-voltage connection for the Electrical Machine Electronics
- High-voltage connection charging socket
The convenience charging electronics is a high-voltage component
High-voltage component warning sticker
Each high-voltage component has on its housing an identifying label that
enables Service employees
and vehicle users to intuitively identify the possible hazards that can result
from the high electric
voltages used.
Only Service employees who satisfy all the prerequisites are permitted
to work on the designated
high-voltage components: suitable qualifications, compliance with the safety
rules, procedure
following the exact repair instructions.
For reasons of high-voltage safety and the warranty, the convenience charging
electronics must not be
opened or otherwise dismantled.
The main tasks of the convenience charging electronics are:
- Communication with electric vehicle supply equipment via a pilot line
and charging plug
detection line
- Actuation of the charge status indicator
- Detection of the status of the charging socket cover
- Activation of the electric motor for locking the charging plug
- Converting the AC voltage into direct current voltage (AC/DC converter)
- Supplying the electric A/C compressor with high voltage
- Supplying the electrical heating with high voltage.
G20 PHEV, convenience charging electronics input/output
- Electric Vehicle Supply Equipment (EVSE)
- Information whether the AC voltage network is available and the charging
cable
is correctly connected, as well as the maximum available current level
- Electric Motor Electronics (EME)
- Requested charging power, charging voltage and charging current level
(setpoint values)
- Body Domain Controller (BDC)
- Terminal status, driving readiness switched off
- Dynamic Stability Control (DSC)
- Vehicle speed
- Digital Motor Electronics (DME)
- Status of parking lock
- Convenience charging electronics (KLE)
- Charging socket
- Status of the charging socket cover and the charging plug
- Electric Motor Electronics (EME)
- Actual value of the set charging power, charging voltage and charging
current
level, charging release
- Digital Motor Electronics (DME)
- Information whether the charging cable is connected and the charging
procedure is active
- Charging socket
- Activation of the LED for locator lighting and charging status display,
activation
of the charging plug lock
- Instrument panel
- Signals for the display of charging information
Communication with EVSE via pilot line and line for charging plug
detection
The pilot line and charging plug detection line are realized as single signal
lines. These signal lines are
shielded and are terminated at a connector in the convenience charging
electronics.
When charging plug is plugged into the vehicle's charging socket, this is
detected by the charging plug
detection line; the maximum current carrying capacity of the charging cable is
also determined. An
ohmic resistor is connected in the connector of the charging cable between the
proximity connection
and the PE conductor. The convenience charging electronics applies a measurement
voltage and
calculates the resistance value in the line for the charging plug detection. The
resistance value
specifies which maximum current level is allowed for the charging cable used
(dependent on the
wire cross-section). The assignment of resistance - current level is specified
in the standard
IEC 61851-1 ed.3.
The pilot line is required for the determination and transmission of the maximum
available charging
current level. The pilot signal is a bipolar rectangle signal (-12 V to +12 V).
The voltage and the duty
cycle are used for communicating different states between the EVSE and the
vehicle:
- High-voltage electric vehicle is ready to charge (Yes/No)
- Fault present (Yes/No)
- Maximum charge current which can be provided by the AC voltage network
- Charge current
- Charging complete.
READ NEXT:
Coordination for starting and ending the charging procedure is performed by
the high-voltage power
management in the EME.
The following actions required by the customer at the start of the charging
The convenience charging electronics actuate the charge status indicator.
Locator lighting:
The locator lighting of the charging socket is used as an
orientation aid by the driver for the connection
The power electronics for the conversion of the AC voltage from the charging
socket to direct current
voltage, which is required for charging the high-voltage battery unit, are
housed in the conveni
SEE MORE:
Concept
The system may prevent some accidents. In the
event of an accident, the system may reduce impact
speed.
The system sounds a warning before an imminent
collision and activates brakes independently,
if needed.
General information`
Depending on the eq
Front airbag, driver
Front airbag, front passenger
Head airbag
Side airbag
Knee airbag
Front airbags
Front airbags help protect the driver and the
front passenger by responding to frontal impacts
in which safety belts alone would not provide adequate
protection.
Side airbag
In the event of a