Overview
This document contains information on:
General
Location
Function requirements
Function
General
The DC/DC converter control unit regulates energy exchange between the 12 V on-board electrical system and the 48 V on-board electrical system.
It is connected to the vehicle's network architecture.
Location
Depending on the vehicle model and equipment, the DC/DC converter control unit together with the 48 V battery is located as a power pack either in the engine compartment or the vehicle interior.
Function requirements
Circuit 30t ON
Circuit 30c ON
Function
The DC/DC converter control unit consists of an output unit and a logic section. The output unit connects the 12 V on-board electrical system to the 48 V on-board electrical system, and it enables energy to be transferred in both directions. The logic section is responsible for communication with other control units and for actuation of the output unit.
The DC/DC converter control unit is networked with the 48 V battery.
The DC/DC converter control unit also processes the following information:
Circuit status
Engine running status
Starter-alternator status
Starter-alternator voltage actual value
Starter-alternator current actual value
Charging voltage specified value
On-board electrical system battery voltage actual value
Battery current switch status
Vehicle speed
Status of driver door (open or closed)
The DC/DC converter control unit processes these input factors and also sends the following information:
Operating rate of DC/DC converter
DC/DC converter current
Temperature of DC/DC converter
State of charge of 48 V battery
Temperature of 48 V battery
Current of 48 V battery
Voltage at 48 V battery
48 V powerpack |
1 | Electronics connection for DC/DC converter control unit |
2 | 48 V battery electronic connection |
3 | 48 V connection (circuit 40) |
4 | Ground connection (circuit 41) |
5 | Degassing connection |
6 | Coolant connection (return) |
7 | Cooling connection (feed) |
8 | Thermal compound |
9 | 12 V connection for DC/DC converter (circuit 30) |
10 | Ground connection for DC/DC converter (circuit 31) |
11 | DC/DC converter/48 V battery internal connection |
12 | 48 V battery |
13 | DC/DC converter control unit |
P54.10-A088-12