A protection device for a vehicle electrical system, including a battery pack having at least one contactor. A microcontroller generates a test pulse at a pulse output thereof and a sense input terminal. The microcontroller has at least one output coupled to the control terminal of the at least one contactor. A first capacitor has a terminal coupled to a first terminal of the at least one contactor; a second capacitor having a terminal coupled to a second terminal of the at least one contactor; and circuitry coupled between the microcontroller and the first and second capacitors. The circuitry reflects the test pulse to the sense input terminal if each contactor is open when the microcontroller applies a contactor opening voltage to the contactor control terminal, and presents a signal different from the reflected test pulse to the sense input terminal of the microcontroller if any contactor is welded shut.


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    Title :

    ELECTRIC CURRENT PROTECTION CIRCUIT


    Additional title:

    ELEKTRISCHE STROMSCHUTZSCHALTUNG
    CIRCUIT DE PROTECTION DE COURANT ELECTRIQUE


    Contributors:

    Publication date :

    2024-02-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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