Patent · US Active

Electrical system and method for diagnosing the functionality of power relays in an electrical system

US11073559B2 · kind B2 · utility

0Cited by

0References

6Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Jens Müller · Haan, DE
Lan Dang Hung · Hannover, DE
Markus STOLZ · Oebisfelde, DE
Hendrik Gerth · Ronnenberg, DE

Key dates

Filing date	Dec 19, 2018
Grant date	Jul 27, 2021
Priority date	—
Expiry date	Jan 15, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01R35/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.