BMW 3 Owners & Service Manuals

BMW 3: What must be observed when charging the high-voltage battery unit?

BMW 3 Series G20 (2018-2024) Training manual / Charging the High-voltage Battery Unit / General information on charging / 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 is pulled out, there is a risk of personal injury or material damage, for example by burning fuel.

Charging the high-voltage battery unit using a typical household power socket results in a high continuous load on the power socket, which does not occur with other household appliances.

Therefore, the following information must be observed:

  • Do not use an adapter or extension cable.
  • First of all, connect the EVSE to the household socket, then to the charging socket at the vehicle.
  • After charging unplug the charging plug at the vehicle and then at the wall.
  • Avoid tripping hazards and mechanical loads for charging cables and power sockets.
  • Do not insert the charging plug in damaged sockets.
  • Do not use damaged charging cables.
  • The charging plug and charging cable may become warm when charging the high-voltage battery unit. If they become too hot, the power socket is not suitable for charging or the charging cable is damaged. Stop charging immediately and have the power socket and charging cable checked by an electrician.
  • In the event of repeated charging faults or terminations contact a suitably qualified Service employee.
  • Only use sockets protected against moisture and weathering.
  • Do not touch contact areas of connectors with fingers or objects.
  • Never repair or modify a charging cable yourself.
  • Remove cable on both sides before cleaning. Do not immerse in fluids.
  • Do not go through a car wash during charging.
  • Only charge at power sockets checked by an electrician.
  • Observe special information in the operating instructions for charging at unknown or unfamiliar infrastructure/power sockets. Then adjust the charge current setting in the vehicle to the lowest value.


     Charging socket at the vehicle

    The charging socket of the G20 PHEV is located on the front left side panel. The charging socket cover is locked and unlocked using an electric motor. This electric motor drive is controlled by

     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 c

     Coordinating the charging procedure

    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


     Wiper system

    General information Do not use the wipers if the windshield is dry, as this may damage the wiper blades or cause them to become worn more quickly. Safety information Warning If the wipers start moving in the folded away state, body parts can be jammed or damage may occur to parts of the vehicle. Th

     Trunk lid

    General information To avoid locking the vehicle key in the vehicle, do not place the remote control in the cargo area. Depending on the vehicle equipment and country version, it is also possible to have the doors unlocked. To perform settings. The trunk lid cannot be opened when the vehicle is in

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