The invention relates to a fixation diagnosis device and a fixation diagnosis method. A fixed connection diagnostic device for diagnosing the presence or absence of fixed connection between a positive-electrode-side relay connected to the positive electrode side of a battery and a negative-electrode-side relay connected to the negative electrode side of the battery, the fixed connection diagnostic device being provided with: an acquisition unit for acquiring the fixed connection between the positive-electrode-side relay and the negative-electrode-side relay before both the contact of the positive-electrode-side relay and the contact of the negative-electrode-side relay are brought into a closed state; acquiring a first voltage value, which is a voltage value between the downstream side of the positive-side relay and the upstream side of the negative-side relay, and a second voltage value, which is a voltage value of a diagnostic circuit provided in parallel with the negative-side relay; and a determination unit that, when the first voltage value is equal to or greater than a first threshold value, determines that the positive-electrode-side relay is in a state in which the contact of the positive-electrode-side relay remains in a closed state and cannot transition to an open state. When the second voltage value is equal to or less than a second threshold value, it is determined that the negative-electrode-side relay is in a state in which the contact is kept in a closed state and cannot transition to an open state.

    本发明涉及固接诊断装置及固接诊断方法。该固接诊断装置对与电池的正极侧连接的正极侧继电器及与电池的负极侧连接的负极侧继电器中的固接的有无进行诊断,具有:获取部,在正极侧继电器的接点及负极侧继电器的接点都被设为闭状态之前,获取正极侧继电器的下游侧与负极侧继电器的上游侧之间的电压值即第一电压值、和与负极侧继电器并联设置的诊断电路的电压值即第二电压值;以及判定部,在第一电压值为第一阈值以上的情况下判定为正极侧继电器处于其接点保持闭状态而不能向开状态转移的状态,在第二电压值为第二阈值以下的情况下判定为负极侧继电器处于其接点保持闭状态而不能向开状态转移的状态。


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    Title :

    Fastening diagnostic device and fastening diagnostic method


    Additional title:

    固接诊断装置及固接诊断方法


    Contributors:

    Publication date :

    2023-09-29


    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



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