Press coverage in detail

Sep 15, 2005

The electric on-board network on cars is becoming increasingly more elaborate; and more and more control units require energy even when the car is parked. This increases the demands made on the on-board network system.

In order to provide, control and distribute sufficient energy on the Audi A8 under all operating conditions, Bosch has developed an electronic battery management system for the car. It controls the energy balance from generation in the alternator, to storage in the battery and on to the consumer, thus guaranteeing optimum supply of energy to the car when moving as well as when stationary.

The system’s battery diagnosis continuously calculates the charge status of the battery along with the high-current capacity. In order to do this, sensors measure battery current and battery charge along with the current battery temperature in order to calculate the actual charge status of the battery. This is necessary, as in the future the amount of energy required by a car may well exceed what is available, even if the engine is running. In addition, the dynamic energy management ensures that the alternator generates as much energy as possible and distributes this as efficiently as possible to the consuming devices. For example, the system can continuously regulate the output of the heating systems, in order to reduce peak loads while still continuing to provide heat.

Kfz-Betrieb, 15.09.2005 / p. 44-47