The invention provides an electric vehicle charging early warning method and system, and relates to the field of electric vehicles, and the method comprises the steps: obtaining a charging time-electric quantity curve and a time-temperature curve of an electric vehicle battery at a standard environment temperature and a standard power grid voltage; setting a time deviation threshold value and a temperature deviation threshold value; the charging time, the real-time electric quantity, the real-time battery temperature and the real-time environment temperature during charging are collected; calculating a time growth rate and a temperature growth rate, and calculating a time correction coefficient and a temperature correction coefficient; and correcting the growth rate through the correction coefficient, and generating a comprehensive judgment index by using the corrected data to judge whether early warning is needed or not. By adopting the method, the influence of environmental factors on the rechargeable battery is reduced, misjudgment caused by deviation of the environmental temperature and the charging voltage is reduced, and the charging safety and the early warning accuracy are improved.

    本发明提供一种电动汽车充电预警方法及系统,涉及电动汽车领域,该方法包括:获取电动汽车电池在标准环境温度和标准电网电压下充电的时间‑电量曲线和时间温度曲线;设定时间偏差阈值和温度偏差阈值;采集充电时的充电时间、实时电量、实时电池温度和实时环境温度;计算时间增长率和温度增长率,计算时间修正系数和温度修正系数;通过修正系数对增长率进行修正,并将修正后的数据生成综合判断指数来判断是否要预警。采用本方法降低了环境因素对充电电池的影响,减少了因环境温度和充电电压偏差导致的误判,提高了充电的安全性与预警的准确性。


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    Title :

    Electric vehicle charging early warning method and system


    Additional title:

    电动汽车充电预警方法及系统


    Contributors:
    YAN JUAN (author) / CAI LI (author) / LEI GUOPING (author) / ZOU XIAOJIANG (author) / LI JUNTING (author)

    Publication date :

    2024-06-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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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