Electric Vehicle Components and Safety

Battery

• Lithium-ion batteries are used to store energy in electric vehicles (EVs).
• In the e-Golf, the battery is located under the vehicle.
• The battery provides energy for driving, heating, and cooling the vehicle.

Electric Machine (E-Machine)

• The electric machine is the electric propulsion motor of the vehicle.
• It is analogous to an internal combustion engine in a gas-powered vehicle.

Voltage Converter

• Electric vehicles need DC (direct current) to charge their batteries.
• AC (alternating current) is commonly available, so it needs to be converted to DC for charging EVs.
• The voltage converter performs this AC to DC conversion.

High Voltage Safety and Components

• High voltage (HV) components in an e-Golf receive power directly from the high voltage battery.
• Only certified high voltage technicians are authorized to work on these components.
• Example: The AC compressor in an e-Golf is a high voltage component.

Scenario: AC Compressor Service

• A certified high voltage technician must de-energize the HV system before a non-HV certified technician(EIP) replaces the AC compressor.
• After the replacement, the certified technician re-energizes the HV system.
• Teamwork is essential: certified technicians and other personnel collaborate to ensure safe and effective repairs.

High Voltage Cables

• HV cables deliver electric current from the battery to HV components.
• These cables are always orange colored.
• They are dangerous and should only be handled by authorized personnel.

Maintenance Connector

• The maintenance connector is the disconnect point for the high voltage battery.
• Disconnecting the maintenance connector de-energizes the high voltage system.
• This is achieved by disconnecting the pilot line circuit and the power supply for the high voltage relay connections.
• Operation of this connector should only be performed by qualified personnel.