The invention relates to the technical field of new energy automobiles, in particular to a power battery protection method and device.The method comprises the steps that a heating request generated by a battery management system when the current temperature and the actual battery charge state of a power battery both meet preset heating conditions is received, and the current state of a vehicle is collected, whether the vehicle meets a preset pulse heating condition or not is judged, if yes, the vehicle is controlled to enter a pulse heating mode, and the electric drive controller is controlled to turn on the high-frequency switch to generate pulse current to heat the power battery. According to the embodiment of the invention, the power battery can correctly enter and exit the pulse heating function in a low-temperature environment, so that the temperature of the battery is quickly and uniformly increased, meanwhile, potential safety hazards caused by over-voltage and under-voltage of the battery in the low-temperature pulse heating process are eliminated, the service life of the power battery is effectively prolonged, the safety of the power battery is effectively improved, and the safety of a vehicle is guaranteed.

    本申请涉及新能源汽车技术领域,特别涉及一种动力电池的保护方法及装置,其中,方法包括:接收电池管理系统在动力电池的当前温度和实际电池荷电状态均满足预设加热条件时生成的加热请求,采集车辆的当前状态,判断车辆是否满足预设脉冲加热条件,若满足则控制车辆进入脉冲加热模式,并控制电驱控制器开启高频开关产生脉冲电流,对动力电池进行加热。本申请实施例可以让动力电池在低温环境下正确进入和退出脉冲加热功能,从而使电池快速均匀升温,同时消除低温脉冲加热过程中电池过压及欠压产生的安全隐患,有效提升了动力电池的寿命和安全性,保障了车辆的安全性。


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    Title :

    Power battery protection method and device


    Additional title:

    动力电池的保护方法及装置


    Contributors:
    YU QIANG (author) / YANG DONGLIN (author) / DENG TINGFENG (author) / CHEN PO (author) / YU CHENG (author)

    Publication date :

    2023-04-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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