A battery diagnosis device according to the present invention comprises a voltage detector for measuring the cell voltage of a battery cell, and a control circuit, which: applies a moving window of a first time length to a reference voltage curve, which is a time series of a plurality of voltage values indicating the cell voltage measured at every sampling time for a predetermined period, so as to determine a plurality of sub voltage curves, and determines the long-term average voltage value of the sub voltage curves by using a first average filter of the first time length with respect to each sub voltage curve; determines the short-term average voltage value of the sub voltage curves by using a second average filter of a second time length that is shorter than the first time length; and compares, with a first threshold deviation and/or a second threshold deviation, each of a plurality of voltage deviations determined with respect to the plurality of sub voltage curves, so as to determine whether the battery cell is abnormal.

    Un dispositif de diagnostic de batterie selon la présente invention comprend un détecteur de tension servant à mesurer la tension de cellule d'une cellule de batterie, et un circuit de commande qui : applique une fenêtre mobile d'une première durée à une courbe de tension de référence, qui est une série chronologique d'une pluralité de valeurs de tension indiquant la tension de cellule mesurée à chaque instant d'échantillonnage pendant une période prédéterminée, de manière à déterminer une pluralité de sous-courbes de tension, et détermine la valeur de tension moyenne à long terme des sous-courbes de tension à l'aide d'un premier filtre à moyenne de la première durée par rapport à chaque sous-courbe de tension ; détermine la valeur de tension moyenne à court terme des sous-courbes de tension à l'aide d'un second filtre à moyenne d'une seconde durée qui est plus courte que la première durée ; et compare, avec un premier écart de seuil et/ou un second écart de seuil, chaque écart de tension d'une pluralité d'écarts de tension déterminés par rapport à la pluralité de sous-courbes de tension, de manière à déterminer si la cellule de batterie est anormale.

    본 발명에 따른 배터리 진단 장치는, 배터리 셀의 셀 전압을 측정하는 전압 검출기 및 소정 기간 동안 샘플링 시간마다 측정된 상기 셀 전압을 나타내는 복수의 전압값의 시계열인 기준 전압 커브에 제1 시간 길이의 무빙 윈도우를 적용하여, 복수의 서브 전압 커브를 결정하되, 각 서브 전압 커브에 대해, 상기 제1 시간 길이의 제1 평균 필터를 이용하여, 상기 서브 전압 커브의 장기 평균 전압값을 결정하고, 상기 제1 시간 길이보다 짧은 제2 시간 길이의 제2 평균 필터를 이용하여, 상기 서브 전압 커브의 단기 평균 전압값을 결정하고, 상기 복수의 서브 전압 커브에 대해 결정된 복수의 상기 전압 편차 각각을 제1 임계 편차 및 제2 임계 편차 중 적어도 하나와 비교하여, 상기 배터리 셀이 비정상인지 여부를 판정하는 제어 회로를 포함한다.


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    Title :

    BATTERY DIAGNOSIS DEVICE, BATTERY PACK, ELECTRIC VEHICLE, AND BATTERY DIAGNOSIS METHOD


    Additional title:

    DISPOSITIF DE DIAGNOSTIC DE BATTERIE, BLOC-BATTERIE, VÉHICULE ÉLECTRIQUE ET PROCÉDÉ DE DIAGNOSTIC DE BATTERIE
    배터리 진단 장치, 배터리 팩, 전기 차량 및 배터리 진단 방법


    Contributors:

    Publication date :

    2023-01-19


    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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