The invention relates to a safety risk assessment method for a power battery, and belongs to the technical field of batteries. The method comprises the following steps: collecting operation data of a battery pack of the electrified equipment and monomer operation data of each monomer in the battery pack, and establishing a battery operation database; according to the collected battery data, high-correlation characteristics related to the single voltage are screened out through a correlation coefficient method; constructing a self-adaptive threshold model, and training the self-adaptive threshold model according to the screened high-correlation features related to the single voltage; acquiring real-time operation data of the power battery, inputting the real-time operation data into the trained adaptive threshold model to obtain a confidence interval based on the single voltage, and calculating the cumulative sum of voltage differences of the real-time average single voltage confidence interval; and constructing a safety risk evaluation function, taking the cumulative sum of the voltage differences as the input of the safety risk function, and calculating to obtain the current safety risk of the battery monomer. According to the invention, the safety risk of each single body can be evaluated in real time.

    本发明涉及一种动力电池的安全风险评估方法,属于电池技术领域。该方法包括:收集电气化设备电池包的运行数据,以及电池包中各个单体的单体运行数据,并建立电池运行数据库;根据所收集到的电池数据,利用相关性系数法筛选出与单体电压相关的高相关性特征;构建自适应阈值模型,并根据筛选出的与单体电压相关的高相关性特征对自适应阈值模型进行训练;采集动力电池的实时运行数据输入训练完成的自适应阈值模型,得到基于单体电压的置信区间,并计算实时平均单体电压置信区间的电压差的累计和;构建安全风险评价函数,并将电压差的累计和作为安全风险函数的输入,计算得到该电池单体当前的安全风险。本发明可对各个单体的安全风险进行实时评估。


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    Title :

    Safety risk assessment method for power battery


    Additional title:

    一种动力电池的安全风险评估方法


    Contributors:
    HU XIAOSONG (author) / LI JINWEN (author) / DENG ZHONGWEI (author) / LIU HONGAO (author) / LI JIACHENG (author) / XIE YI (author) / ZHANG KAI (author)

    Publication date :

    2024-08-16


    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 / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen



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