48 V On-Board Electrical System DC/DC Converter Control Unit Basic Function - GF54.10-P-9898A
Model All (4xWD)
Model All (CAR)
Example illustration of 12 V on-board electrical system and 48 V on-board electrical system
Example illustration of 48 V powerpack
Overview
This document contains information on:
- General
- Function requirements
- Function
General
The DC/DC converter control unit (20) together with the 48 V battery (19) forms the so-called powerpack.
The DC/DC converter control unit (20) connects the 12 V on-board electrical system to the 48 V on-board electrical system and regulates the energy exchange between these two on-board electrical systems. It is connected to the vehicle's network architecture.
Function requirements
- Circuit 30t ON
- Circuit 30c ON
Function
The DC/DC converter control unit (20) 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 (20) is networked with the 48 V battery (19). It includes the energy management for the 48 V on-board electrical system.
The 48-V powerpack contains a heat sink with coolant connection (13, 14) to prevent the battery from overheating. Depending on the model involved, there is also a thermally fast cooling and heating element. When the battery is cold, the cooling and heating element operates as a battery heater. When the battery has heated up, this improves cooling. This maintains operation even at extreme temperatures.
The DC/DC converter control unit (20) 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 (20) processes these input factors and also sends the following information:
- Operating rate of DC/DC converter
- Current of DC/DC converter
- Temperature of DC/DC converter
- State of charge of 48 V battery (19)
- Temperature of (19)
- Current of 48 V battery (19)
- Voltage at 48 V battery (19)
- Detection of a thermal event
| Component descriptions | |||
| Component description for DC/DC converter control unit | Model 223 | GF54.10-P-3006A | |
| Model 206 | GF54.10-P-3006C | ||
| Model 232 | GF54.10-P-3006F | ||
| Model 254 | GF54.10-P-3006H | ||
| Model 214 | GF54.10-P-3006K | ||
| Model 118 as of model year 2023 Model 177, 247 as of model year 2022 |
GF54.10-P-3006L | ||
| Model 167 as of model year 2023 |
GF54.10-P-3006M | ||
| Model 192 | GF54.10-P-3006R |