The invention relates to a battery over-current protection circuit. The circuit comprises a main control module; a cut-off protection module connected among the battery pack, an external power supply and a load, wherein the cut-off protection module comprises an MOS tube group, the MOS tube group comprises a plurality of MOS tubes, source electrodes of the plurality of MOS tubes are connected together, drain electrodes of the plurality of MOS tubes are connected together, so that the plurality of MOS tubes are of a parallel connection structure, and a signal output end of the main control module is connected with grid electrodes of the MOS tubes; and a sampling detection module which comprises a current detection unit, wherein the current detection unit is electrically connected with the cut-off protection module, the signal output end of the current detection unit is connected with the signal input end of the main control module, and the current detection unit is used for detecting and obtaining the working current I. The cut-off protection module disclosed by the invention adopts a multi-MOS tube parallel structure, and has the advantages of high response speed, good expandability, good reliability and durability, small size, light weight, low power consumption and low component cost.

    本公开涉及一种电池过电流保护电路,包括:主控模块;切断保护模块,所述切断保护模块接入在电池组与外部电源及负载之间;所述切断保护模块包括MOS管组,所述MOS管组包括多个MOS管,多个所述MOS管的源极共接,漏极共接,使多个所述MOS管呈并接结构,且所述主控模块的信号输出端连接所述MOS管的栅极;采样检测模块,所述采样检测模块包括电流检测单元,所述电流检测单元与所述切断保护模块电连接,且所述电流检测单元的信号输出端连接所述主控模块的信号输入端,用于检测获得所述工作电流I。本公开的切断保护模块采用多MOS管并联结构,具有响应速度快、可扩展性好、可靠性和耐用性好、体积小、重量小、功耗和部件成本低的优点。


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    Titel :

    Battery overcurrent protection circuit


    Weitere Titelangaben:

    一种电池过电流保护电路


    Beteiligte:
    WEI XIAOYU (Autor:in)

    Erscheinungsdatum :

    2022-01-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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