DC Charge Connection Unit, Basic Function - GF47.70-P-9894A

Model All (CAR) with code 83B (DC charging function) 

Overview 

This document contains information on:

• General 
• Function 

General 

The DC charge-connection unit monitors and controls the charging process of the high-voltage battery when it is connected to an external DC voltage source (e.g. a charging station).

Function 

The DC current charge-connection unit is connected to the network architecture of the vehicle.

Once the vehicle socket is connected with the voltage source, the DC current charge-connection unit communicates via a control line (Control Pilot) with the control box in the charging cable and/or with the charging station. In this connection, the output data of the voltage source are transmitted and the power consumption of the DC current charge-communication unit is accordingly adjusted. It is only then that the DC current charge-connection unit initiates the charging process.

The high-voltage battery can only be charged via the DC current charge-connection unit if a voltage source with direct voltage is available.

The DC charge-connection unit process information including the following:

• Circuit status
• high-voltage battery current
• High-voltage battery voltage
• Current/voltage request
• Lock/unlock socket flap request.
• Lock/unlock charging cable socket request
• Battery disconnect switch status
• Engine running status (hybrid vehicles)

The DC charge-connection unit processes these input factors and sends information including the following:

• Charging voltage
• Charging current
• DC current charge-connection unit status
• Charging cable status (plugged in, not plugged in)
• Control Pilot status
• Socket flap status
• Charging cable socket lock status
• Fault messages