Energy Management, Basic Function - GF54.10-P-9900A
Model all (4xWD)
Model all (CAR)
Overview
This document contains information on:
- General
- Function
- 12 V on-board electrical system
- 24 V on-board electrical system (off-road vehicle with on-board electrical system 12 V/24 V)
- 48 V on-board electrical system (vehicles with 48 V technology)
- High-voltage on-board electrical system (hybrid vehicles, electric vehicles)
General
The energy management manages the provision (supply) and consumption (budget) of electrical energy. It controls all the measures that assure the mobility of the vehicle and guarantee that all the consumers receive a stable supply of electrical energy according to requirements. The aim is efficient use of energy.
Function
Energy management includes different on-board electrical systems.
12 V on-board electrical system
The 12 V on-board electrical system supplies the electrical consumers of different systems, such as interior lighting, exterior lighting or engine management, with electrical energy. The main components of the 12 V on-board electrical system are the 12 V on-board electrical system battery, the alternator (vehicles with 12 V alternator) or the DC/DC converter (vehicles with 48 V technology, hybrid vehicles, electric vehicles) and the energy management control system.
Vehicles for highly automated parking or driving also have a secondary 12 V on-board electrical system. If the 12 V on-board electrical system fails, system-relevant consumers are further supplied via the secondary 12 V on-board electrical system.
24 V on-board electrical system (off-road vehicle with on-board electrical system 12 V/24 V)
Depending on the equipment installed, the 24 V on-board electrical system supplies various electrical consumers such as, e.g. two-way radio, winch or sockets. The main components of the 24 V on-board electrical system are the 24 V on-board electrical system battery, the 24 V alternator and, depending on the equipment installed, the 24 V start box with jump-start socket.
48 V on-board electrical system (vehicles with 48 V technology)
The 48 V on-board electrical system supplies all 48 V consumer (consumers with high energy requirement) with electrical energy. It also provides electrical energy for starting the combustion engine with the starter-alternator. The main components of the 48 V on-board electrical system are the 48 V battery, the DC/DC converter (energy transfer), the powertrain control unit (traction management control) and the starter-alternator.
High-voltage on-board electrical system (hybrid vehicles, electric vehicles)
The high-voltage on-board electrical system makes it possible to operate the electric machine for the electric drive. The high-voltage on-board electrical system provides electrical energy to electrical consumers with high energy demands, e.g. the electrical refrigerant compressor or high-voltage PTC heater. The main components of the high-voltage on-board electrical system are the high-voltage battery, the DC/DC converter (energy transfer), the electric machine, the high-voltage starter-alternator (AMG hybrid vehicles, depending on the equipment installed) and the battery management system control unit (energy management).
| Additional basic functions | |||
| Evaluate battery charge level, basic function | GF54.10-P-1000A | ||
| Charge battery while driving, basic function | GF54.10-P-1002A | ||
| Stationary battery charging, basic function | GF54.10-P-1006A | ||
| Energy management for ECO start/stop function, basic function | Model 118, 167, 177, 206, 223, 232, 247, 254 Model 213, 238, 257, 290 as of model year 2021 |
GF54.10-P-1009A | |
| Energy management in event of voltage drop, basic function | GF54.10-P-1010A | ||
| Deep discharge protection, basic function | GF54.10-P-1012A | ||
| DC/AC converter, basic function | Model all (CAR) with code U67 (230 V socket in rear passenger compartment) Model all (CAR) with code U80 (115 V socket) |
GF54.10-P-1013A | |
| 12 V on-board electrical system, basic function | GF54.10-P-1014A | ||
| 48 V on-board electrical system, basic function | Model all (CAR) with code B01 (48V technology) |
GF54.10-P-1015A | |
| High-voltage on-board electrical system, basic function | Hybrid vehicles and electric vehicles | GF54.10-P-1016A | |
| Separate operation of secondary 12 V on-board electrical system, basic function | Model all (CAR) | GF54.10-P-1017A | |
| Battery cell monitoring, basic function | Model all (CAR) | GF54.10-P-1019A |