The present invention relates to insulation resistance measuring device and method which comprises: a sensing resistor unit including a first sensing resistor connected on a path from a first terminal of a battery to a body node connected to a vehicle body and a second sensing resistor connected on a path from the body node to a second terminal of the battery; a switch unit including a first switch controlling current flow between the first terminal and the first sensing resistor and a second switch controlling current flow between the second terminal and the second sensing resistor; a current measurement unit measuring a target current defined as the current drawn from or drawn into the battery; and a controlling unit measuring the target current which selectively flows through the first sensing resistor and the second sensing resistor according to the ON/OFF operation control of the switch unit through the current measurement unit and measuring the insulation resistance between the battery and the vehicle body based on the measured target current. According to one aspect of the present invention, the present invention measures the insulation resistance using only a current sensor provided in a BMS (Battery Management System) without a separate voltage measuring device required to measure the insulation resistance between a battery pack and the vehicle body such that the device can reduce the cost required for insulation resistance measurement and at the same time reduce the size of a controller to derive the effect of simplifying the BMS and can eliminate the risk due to the leakage current due to insulation deterioration by detecting deterioration of the insulation resistance in advance.

    본 발명은 절연 저항 측정 장치 및 방법에 관한 것으로서, 배터리의 제1 단자로부터 차량의 바디에 접속되는 바디 노드까지 연결되는 경로 상에 접속되는 제1 센싱 저항과, 바디 노드로부터 배터리의 제2 단자까지 연결되는 경로 상에 접속되는 제2 센싱 저항을 포함하는 센싱 저항부, 제1 단자 및 제1 센싱 저항 간의 전류 흐름을 단속하는 제1 스위치와, 제2 단자 및 제2 센싱 저항 간의 전류 흐름을 단속하는 제2 스위치를 포함하는 스위치부, 배터리로부터 인출되거나 배터리로 인입되는 전류로 정의되는 대상 전류를 측정하는 전류 측정부, 및 스위치부의 온오프 동작 제어에 따라 제1 센싱 저항 및 제2 센싱 저항에 선택적으로 흐르는 대상 전류를 전류 측정부를 통해 측정하고, 측정된 대상 전류를 기반으로 배터리와 차량의 바디 간의 절연 저항을 측정하는 제어부를 포함하는 것을 특징으로 한다.


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    Title :

    APPARATUS AND METHOD FOR MEASURING INSULATION RESISTANCE


    Additional title:

    절연 저항 측정 장치 및 방법


    Contributors:

    Publication date :

    2022-08-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

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



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