The invention discloses a new energy automobile relay abnormity protection circuit. The circuit comprises a buck-boost chip, a buck chip, a high-side driving chip, a D-type trigger, an MCU main control chip, an ADC chip and an isolation chip, wherein a KL30 constant power supply is connected with the buck-boost chip, the 12V output of a VOUT pin of the KL30 constant power supply is connected with the buck chip and the high-side driving chip, the 5V output of the VOUT pin is connected with the D-type trigger, the isolation chip and the ADC chip, the MCU chip is connected with the D-type trigger, in the normal operation process of the whole vehicle, the situation that a vehicle relay is frequently attracted and disconnected is reduced, the situation that the relay is disconnected unexpectedly due to abnormal reset of the MCU can be reduced, and the service life of the relay can be prolonged by reducing abnormal actions of the relay.

    本发明公开了一种新能源汽车继电器异常保护电路,电路包括buck‑boost芯片、buck芯片、高边驱动芯片、D型触发器、MCU主控芯片、ADC芯片及隔离芯片,KL30常电电源连接buck‑boost芯片,其VOUT引脚的12V输出连接buck芯片和高边驱动芯片,VOUT引脚输出5V输出连接D型触发器、隔离芯片和ADC芯片,MCU芯片连接D型触发器,在整车正常运行过程中,减少车辆继电器频繁吸合断开的情况,可减少因MCU异常复位导致继电器非预期断开等情况,减少继电器异常动作也会延长继电器寿命。


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    Title :

    New energy automobile relay abnormity protection circuit


    Additional title:

    一种新能源汽车继电器异常保护电路


    Contributors:
    WANG KAI (author) / SHEN CHUNHUA (author)

    Publication date :

    2021-07-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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