Energy Management, Basic Function - GF54.10-D-9900A

Model All (Light transporter) 

Overview 

This document contains information on:

• General 
• Function 
  • 12 V on-board electrical system 
  • High-voltage on-board electrical system (electric vehicles). 

General 

Energy management manages the provision (supply) and consumption (balance) of electrical energy. It controls all the measures that ensure the mobility of the vehicle and guarantees that all the consumers receive a demand-based and stable supply of electrical energy. The objective 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, e.g. 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 (electric vehicles), and the energy management control system.

High-voltage on-board electrical system (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 electric 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 and the battery management system control unit (energy management).