Audi Ag

Flextronics International Kft.

Karsten Barth

Thomas Hackner

Rolf Naumann

Vit Kocur

Dirk Herke

Rolf Wagner

A process to check a connection between a battery () supplying a low-voltage network () of a motor vehicle (), the voltage of which is less than the voltage of a high-voltage network () of the motor vehicle (), and the low-voltage network (); wherein a DC voltage converter (), which is configured for exchanging electrical power between the high-voltage network () and the low-voltage network (), connects the high-voltage network () to the low-voltage network (); wherein a DC voltage converter () modulates the output voltage into the low-voltage network at a modulation frequency; wherein the current hereby applied and the voltage hereby applied are measured by the battery (), and a resistance value is determined and evaluated with respect to at least one connection criterion, according to which a connection fault is determined when at least one connection criterion is not fulfilled.

Method for checking a connection between a low-voltage supply system and a battery, and motor vehicle

A system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current. The system includes a measuring unit which can determine the voltages applied to the individual capacitor cells by measuring voltages, an evaluation unit which sets a nominal voltage for the capacitor cells, and at least one discharge branch connectable to each capacitor cell and controllable by a discharge control unit which discharges a respective capacitor cell onto said discharge branch depending upon the set nominal voltage and the applied voltage.

System, method and device for monitoring capacitor cells connected in series in a capacitor module

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Chemnitz, Germany

Karsten Barth