The invention discloses a charging protection circuit for a battery pack of an electric vehicle. The charging protection circuit comprises a PMOS (P-channel Metal Oxide Semiconductor) tube Q1, resistors R1, R2, R3 and R4, a controllable precise voltage-stabilizing source TL431 and a PMOS tube Q2, the source electrode of the PMOS tube Q1 is connected with the positive electrode of the lithium battery, the grid electrode of the PMOS tube is connected with the negative electrode of the lithium battery, and the drain electrode of the PMOS tube is respectively connected with one end of the resistor R1, one end of the resistor R3 and the source electrode of the PMOS tube Q2; the other end of the resistor R1 is connected with one end of the R2, and the other end of the R2 is connected with the negative electrode of the lithium battery; the other end of the resistor R3 is connected with the cathode of a controllable precise voltage stabilizing source TL431, the anode of the TL431 is connected with the cathode of the lithium battery, and the input end of the TL431 is connected between the resistor R1 and the resistor R2; the source electrode of the PMOS tube Q2 is connected between the R3 and the cathode of the TL431, the drain electrode of the PMOS tube Q2 is connected with one end of the resistor R4, and the other end of the resistor R4 is connected with the cathode of the lithium battery. The charging equalization of the lithium battery can be realized, the service life of the battery can be effectively prolonged, and the charging equalization circuit has the advantages of simple structure, good practicability and the like.

    本发明公开了一种电动车电池组充电保护电路,包括PMOS管Q1、电阻R1、R2、R3、R4、可控精密稳压源TL431和PMOS管Q2;所述PMOS管Q1的源极与锂电池的正极连接,PMOS管的栅极与锂电池的负极连接,PMOS管的漏极分别与电阻R1、R3的一端以及PMOS管Q2的源极连接;所述电阻R1的另一端与R2的一端连接,R2的另一端与锂电池的负极连接;所述电阻R3的另一端与可控精密稳压源TL431的阴极连接,TL431的阳极与锂电池的负极连接,TL431的输入端连接在电阻R1和R2之间;所述PMOS管Q2的源极连接在R3和TL431的阴极之间,PMOS管Q2的漏极与电阻R4的一端连接,电阻R4的另一端与锂电池的负极连接。本发明可以实现锂电池的充电均衡,能够有效的提升电池的使用寿命,而且本发明具有结构简单、实用性好等优点。


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    Title :

    Charging protection circuit for battery pack of electric vehicle


    Additional title:

    一种电动车电池组充电保护电路


    Contributors:
    PENG ZHIHUI (author) / QIN CHENGHENG (author) / XIE YIKANG (author) / ZHANG JIAWEN (author)

    Publication date :

    2023-07-28


    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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