The invention discloses a high-voltage pre-charging loop, a high-voltage pre-charging method and a high-voltage pre-charging system for an electric vehicle. The invention provides a high-voltage pre-charging loop. The high-voltage pre-charging loop comprises a power battery pack, an X capacitor PDU, a positive relay and a negative relay. The PDU is electrically connected with the positive electrode and the negative electrode of the power battery pack through the positive electrode relay and the negative electrode relay. The two ends of the X capacitor are electrically connected between the positive pole relay and the PDU and between the negative pole relay and the PDU respectively. According to the high-voltage pre-charging loop of the electric vehicle, a pre-charging relay and a pre-charging resistor are removed, the cost of the high-voltage pre-charging loop is reduced on the premise that normal pre-charging of the high-voltage pre-charging loop is not affected, so that the scheme of a high-voltage system is optimized, and the hardware cost of the high-voltage system is reduced.

    本发明公开了电动汽车高压预充回路、高压预充方法及高压预充系统,本发明提供了一种高压预充回路,包括动力电池包、X电容PDU、正极继电器和负极继电器,所述PDU通过正极继电器和负极继电器与动力电池包的正、负极电连接,所述X电容的两端分别电连接于正极继电器和PDU之间、负极继电器和PDU之间。本发明提供的电动汽车高压预充回路,去掉预充继电器和预充电阻,在不影响高压预充回路预充正常进行的前提下降低高压预充回路成本,优化高压系统方案,降低高压系统硬件成本。


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    Title :

    High-voltage pre-charging loop, high-voltage pre-charging method and high-voltage pre-charging system for electric vehicle


    Additional title:

    电动汽车高压预充回路、高压预充方法及高压预充系统


    Contributors:
    PAN ZHIQIANG (author) / ZHANG MING (author) / HUANG MIN (author)

    Publication date :

    2021-07-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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