The invention discloses a diagnosis circuit of a power battery, a control method of the diagnosis circuit and the power battery, the diagnosis circuit of the power battery comprises an equalization module, an equalization diagnosis module, a sampling diagnosis module and a control module, the equalization module and the equalization diagnosis module are both connected in parallel with an equalization switch in an equalization loop, the control module is respectively connected with the equalization module, the equalization diagnosis module and the sampling diagnosis module, the control module is used for controlling the equalization switch to be in an on state during line diagnosis so as to enable the equalization module to discharge, and controlling the equalization switch to be in an off state after the equalization switch is continuously conducted for a first preset time so as to enable the equalization module to discharge; and controlling the equalization diagnosis module and the sampling diagnosis module so as to carry out line diagnosis on the sampling branch and the equalization loop. The diagnosis circuit provided by the embodiment of the invention is stable in sampling, low in cost and capable of shortening the sampling period and improving the protection capability and the diagnosis reliability of the battery cell sampling board.

    本发明公开了一种动力电池的诊断电路及其控制方法和动力电池,一种动力电池的诊断电路,包括:均衡模块、均衡诊断模块、采样诊断模块和控制模块,均衡模块和均衡诊断模块均与均衡回路中的均衡开关并联,控制模块与均衡模块、均衡诊断模块、采样诊断模块分别连接,其中,控制模块,用于在进行线路诊断时,控制均衡开关处于导通状态,以使均衡模块进行放电,并在均衡开关持续导通第一预设时间后,控制均衡开关处于断开状态,以及控制均衡诊断模块和采样诊断模块,以对采样支路和均衡回路进行线路诊断。本发明实施例的诊断电路,采样稳定,且成本低,并能够缩短采样周期,提高电芯采样板的防护能力以及诊断可靠性。


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    Title :

    Diagnostic circuit of power battery, control method of diagnostic circuit and power battery


    Additional title:

    动力电池的诊断电路及其控制方法和动力电池


    Contributors:
    YAO HANG (author)

    Publication date :

    2024-06-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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







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    Free access