The invention relates to the technical field of electric vehicle power battery management, and discloses a self-adaptive electric vehicle charge state estimation method which comprises the following steps: S1, firstly, initializing a voltage, current and temperature detection module, a communication module and a display module, and modeling a power battery model; a voltage detection module, a current detection module and a temperature detection module are adopted to detect voltage, current and temperature information of a power battery, and the running state of the electric vehicle is judged. On the basis of traditional particle filtering, the observation noise variance self-adaptive estimation method is provided, when the SOC initial value error is large, the convergence speed and robustness of self-adaptive particle filtering and the SOC estimation precision and stability have better effects, the estimation precision of the state of charge of the power battery of the electric vehicle is remarkably improved, and the estimation accuracy of the state of charge of the power battery of the electric vehicle is improved. The charging time of the power battery can be reasonably arranged, and the management reliability of the power battery is improved.

    本发明涉及电动汽车动力电池管理技术领域,公开了一种自适应电动汽车荷电状态估计方法,包括以下步骤:S1、首先,对电压、电流以及温度检测模块、通信模块和显示模块进行初始化,并对动力电池模型进行建模,S2、随后,采用电压、电流以及温度检测模块对动力电池的电压、电流和温度信息进行检测,并对电动汽车的运行状态进行判断。本发明通过在传统粒子滤波基础上,提出了观测噪声方差自适应估计方法,SOC初值误差较大时,自适应粒子滤波收敛速度和鲁棒性、SOC估计精度和稳定性具有更优的效果,显著提高了对电动汽车的动力电池的荷电状态的估算精度,可以合理安排动力电池的充电时间,提高了对动力电池进行管理的可靠性。


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    Title :

    Self-adaptive electric vehicle charge state estimation method


    Additional title:

    一种自适应电动汽车荷电状态估计方法


    Contributors:
    ZHANG LINLIANG (author) / WU HONGTAO (author) / LI ZHAOXIA (author) / LI SAIFEI (author) / CAO GUIFANG (author)

    Publication date :

    2023-05-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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