Task
The DC current charge-connection unit monitors and controls the charging process of the high-voltage battery when connected to an external DC-voltage source (e. g. charging station).
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 current charge-connection unit processes amongst other things the following information:
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 current charge-connection unit processes these input factors and transmits amongst other things the following information:
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