A method for detecting an isolation fault in an isolation resistance between a positive and negative high-voltage bus rail and a vehicle chassis on a high-voltage propulsion side of a high-voltage system of an electric or hybrid-electric vehicle. The high-voltage system is split into a battery side and propulsion side by means of two high-voltage contactors located in the positive and negative high-voltage bus rails. The propulsion side includes first and second capacitors connected in series across the positive and negative bus rails, a common junction of the first and second capacitors connected to the chassis. The method supplies a low-voltage output to the positive and negative bus rails to charge the capacitors; and determines, based on charging current, voltage level or energy level of the capacitors, whether an isolation fault is present between the positive and/or negative high-voltage bus rail and the vehicle chassis on the propulsion side.


    Access

    Download


    Export, share and cite



    Title :

    Method for detecting an isolation fault


    Contributors:

    Publication date :

    2023-09-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



    METHOD FOR DETECTING AN ISOLATION FAULT

    ISAKSSON BJÖRN | European Patent Office | 2021

    Free access

    METHOD FOR DETECTING AN ISOLATION FAULT

    ISAKSSON BJÖRN | European Patent Office | 2020

    Free access

    DETECTING GROUND ISOLATION FAULT IN ETHERNET PODL SYSTEM

    GARDNER ANDREW J / HEATH JEFFREY L | European Patent Office | 2018

    Free access

    Detecting ground isolation fault in ethernet PoDL system

    GARDNER ANDREW J / HEATH JEFFREY L | European Patent Office | 2018

    Free access

    DETECTING GROUND ISOLATION FAULT IN ETHERNET PoDL SYSTEM

    GARDNER ANDREW J / HEATH JEFFREY L | European Patent Office | 2016

    Free access