ELECTRICAL SYSTEM AND METHOD FOR DIAGNOSING THE FUNCTIONALITY OF POWER RELAYS IN AN ELECTRICAL SYSTEM

An electrical system comprises at least one high-voltage battery, at least one DC link capacitor and at least two power relays, whereby one power relay is arranged between a positive connector of the high-voltage battery and the DC link capacitor, while the other power relay is arranged between a ne...

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Bibliographische Detailangaben
Hauptverfasser:	MÜLLER, Jens Uwe, HUNG, Lan Dang, STOLZ, Markus, GERTH, Hendrik
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BASIC ELECTRIC ELEMENTS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS RELAYS SELECTORS TESTING
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Beschreibung
Zusammenfassung:	An electrical system comprises at least one high-voltage battery, at least one DC link capacitor and at least two power relays, whereby one power relay is arranged between a positive connector of the high-voltage battery and the DC link capacitor, while the other power relay is arranged between a negative connector of the high-voltage battery and the DC link capacitor, whereby the electrical system has a galvanically isolated DC/DC converter that is connected to a voltage source in the electrical system, whereby the DC/DC converter is configured such that it can transmit electric energy to a high-voltage side with the DC link capacitor in order to pre-charge the DC link capacitor, whereby the electrical system has a diagnostic device to test the power relays, whereby the diagnostic device has switchable voltage sensors, whereby one voltage sensor is arranged in parallel to the high-voltage battery, one voltage sensor is arranged in parallel to the DC link capacitor, in each case, one voltage sensor is arranged in parallel to the power relays, one voltage sensor is arranged between the positive connector of the high-voltage battery and the negative connector of the DC link capacitor, and one voltage sensor is arranged between the negative connector of the high-voltage battery and a connector between the power relay and the positive connector of the DC link capacitor, and the invention also relates to a method for diagnosing the functionality of power relays in an electrical system.