The invention discloses a method and device for determining the state of a single battery and a storage medium. The method comprises the steps that first voltage data of any single battery in a single battery pack of the vehicle are obtained, and the first voltage data are normal voltage data of any single battery; based on the first voltage data, determining second voltage data of any single battery in a preset time period; based on the second voltage data, a variance value of the second voltage data of any single battery is determined, and the variance value is used for representing a fluctuation state of any single battery in a preset time period; and determining whether the state of any single battery is a normal state or an abnormal state based on the variance value. The method solves the technical problems that a diagnosis method for the thermal runaway risk of the power battery is large in calculation amount and cannot realize online application.

    本发明公开了一种确定单体电池状态的方法、装置和存储介质。其中,该方法包括:获取车辆的单体电池组中任意一个单体电池的第一电压数据,其中,第一电压数据为任意一个单体电池的正常电压数据;基于第一电压数据,确定在预设时间段内任意一个单体电池的第二电压数据;基于第二电压数据,确定任意一个单体电池的第二电压数据的方差值,其中,方差值用于表征任意一个单体电池在预设时间段内的波动状态;基于方差值,确定任意一个单体电池的状态为正常状态或异常状态。本发明解决了动力电池热失控风险的诊断方法计算量大且未能实现在线应用的技术问题。


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    Title :

    Method and device for determining state of single battery and storage medium


    Additional title:

    确定单体电池状态的方法、装置和存储介质


    Contributors:
    MA SHAODONG (author) / SUN HUANLI (author) / WANG SHUYANG (author) / LI XUE (author) / XU LICHAO (author)

    Publication date :

    2023-03-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung