A battery diagnosis device according to the present invention comprises: a voltage sensor that generates a voltage signal indicating a battery voltage of a battery; a current sensor that generates a current signal indicating a battery current of the battery; and a control circuit. A capacity curve indicating the relationship between the battery voltage and a charging capacity within a set voltage range is determined on the basis of the voltage signal and the current signal, which are collected every unit time during a constant current charging period. The control circuit determines, on the basis of the capacity curve, a differential curve indicating the relationship between the battery voltage and a differential capacity within the set voltage range. The control circuit determines an approximate straight line of the differential curve by using a linear approximation algorithm, and determines whether a lithium precipitation abnormality has occurred in the battery, on the basis of the approximate straight line.

    Un dispositif de diagnostic de batterie selon la présente invention comprend : un capteur de tension qui génère un signal de tension indiquant une tension de batterie d'une batterie ; un capteur de courant qui génère un signal de courant indiquant un courant de batterie de la batterie ; et un circuit de commande. Une courbe de capacité indiquant la relation entre la tension de batterie et une capacité de charge à l'intérieur d'une plage de tension définie est déterminée sur la base du signal de tension et du signal de courant, qui sont collectés chaque unité de temps pendant une période de charge à courant constant. Le circuit de commande détermine, sur la base de la courbe de capacité, une courbe différentielle indiquant la relation entre la tension de batterie et une capacité différentielle dans la plage de tension réglée. Le circuit de commande détermine une ligne droite approximative de la courbe différentielle à l'aide d'un algorithme d'approximation linéaire, et détermine si une anomalie de précipitation de lithium s'est produite dans la batterie, sur la base de la ligne droite approximative.

    본 발명에 따른 배터리 진단 장치는, 배터리의 배터리 전압을 나타내는 전압 신호를 생성하는 전압 센서; 상기 배터리의 배터리 전류를 나타내는 전류 신호를 생성하는 전류 센서; 및 제어 회로를 포함한다. 정전류 충전 기간 동안에 단위 시간마다 수집된 상기 전압 신호 및 상기 전류 신호를 기초로, 설정 전압 범위 내에서의 상기 배터리 전압과 충전 용량 간의 관계를 나타내는 용량 커브를 결정한다. 상기 제어 회로는, 상기 용량 커브를 기초로, 상기 설정 전압 범위 내에서의 상기 배터리 전압과 미분 용량 간의 관계를 나타내는 미분 커브를 결정한다. 상기 제어 회로는, 선형 근사 알고리즘을 이용하여, 상기 미분 커브의 근사 직선을 결정하고, 상기 근사 직선을 기초로, 상기 배터리의 리튬 석출 이상 여부를 판정한다.


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    Titel :

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


    Weitere Titelangaben:

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


    Beteiligte:
    KIM YOUNG-JIN (Autor:in)

    Erscheinungsdatum :

    2022-07-07


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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