The invention relates to the technical field of automobile energy management, and discloses a pure electric automobile energy management method and system under an automobile following working condition. And establishing a prediction model of the following working condition based on the front vehicle information and the own vehicle state information, and predicting to obtain future time domain information. An objective function is established by considering car following safety and control energy consumption, the objective function is solved according to future time domain information, and an expected acceleration optimal control sequence in a prediction time domain is obtained; and predicting the demand power in the time domain based on the expected acceleration optimal control sequence in the predicted time domain, and decomposing the demand power in the predicted time domain into high-frequency demand power and low-frequency demand power by using a third-order Haar wavelet theory. The high-frequency required power is transmitted to the super capacitor, and the low-frequency required power is distributed to the super capacitor and the lithium battery through fuzzy control. The high-frequency transient power is matched by utilizing the unique advantages of the super capacitor, and the low-frequency steady-state power is balanced by utilizing the lithium battery. The energy utilization rate can be improved and the service life of the lithium battery is prolonged.

    本申请涉及汽车能量管理技术领域,公开了一种跟车工况下纯电动汽车能量管理方法及系统。基于前方车辆信息和自车状态信息建立跟车工况的预测模型,并预测获得未来时域信息。考虑跟车安全性和控制能耗建立目标函数,根据未来时域信息求解目标函数,获得预测时域内期望加速度最优控制序列;基于预测时域内期望加速度最优控制序列预测时域内需求功率,并利用三阶哈尔小波理论将预测时域内需求功率分解成高频需求功率和低频需求功率。将高频需求功率传输给超级电容,通过模糊控制将低频需求功率分配给超级电容和锂电池。实现利用超级电容独特的优势匹配高频暂态功率,利用锂电池平衡低频稳态功率。能够提高能源利用率,延长锂电池的寿命。


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    Title :

    Pure electric vehicle energy management method and system under vehicle following working condition


    Additional title:

    一种跟车工况下纯电动汽车能量管理方法及系统


    Contributors:
    ZHANG ZHIWEN (author) / TANG JIE (author) / ZHANG JIYUAN (author) / ZHAO DINGXUAN (author)

    Publication date :

    2024-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES



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