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.


    Access

    Download


    Export, share and cite



    Title :

    ELECTRIC CURRENT PROTECTION CIRCUIT AND METHOD OF USING SAME


    Contributors:

    Publication date :

    2020-07-02


    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



    Electric current protection circuit and method of using same

    BONETTI ROBERT ARTHUR | European Patent Office | 2021

    Free access

    ELECTRIC CURRENT PROTECTION CIRCUIT

    BONETTI ROBERT ARTHUR | European Patent Office | 2024

    Free access

    Short-circuit protection circuit for alternating-current pile of electric vehicle

    CAO YUANYUAN / CUI WENJUAN / WANG JIAN | European Patent Office | 2024

    Free access


    Electric vehicle charging protection circuit

    LEE YOUEN WOO | European Patent Office | 2019

    Free access