The invention discloses an on-line safety early warning method for a power battery. The method comprises the following steps: acquiring voltage data in a charging process of a vehicle power battery in a battery replacing station; performing data cleaning processing, and removing a high-frequency part based on empirical mode decomposition (EMD); setting the size of a sliding window and a sliding step size; calculating amplitude, variance and kurtosis factor values of the voltage data in the current sliding window in the charging process; comparing with a preset threshold value; if the comparison result is that at least one numerical value exceeds the preset threshold value, early warning processing is carried out; otherwise, the sliding window is moved forwards by a sliding step length, and calculation, comparison and judgment are continued until the charging process of the power battery is completed. The invention also discloses a corresponding system and a battery swap station. According to the invention, the abnormal condition of the power battery can be quickly and effectively identified at low cost.
本发明公开了一种动力电池在线安全预警方法,其包括:采集换电站内车辆动力电池充电过程中的电压数据;进行数据清洗处理,基于经验模态分解(EMD)去掉其中的高频部分;设定滑动窗口的大小和滑动步长大小;计算充电过程中电压数据在当前滑动窗口内振幅、方差、峭度因子数值;并与预设定的阈值进行比较;如果比较结果为至少一数值超出预设定的阈值,则进行预警处理;否则,将滑动窗口向前移动一个滑动步长,继续进行计算比较判断,直至完成动力电池充电过程。本发明还公开了相应的系统以及换电站。实施本发明,可以低成本,且快速有效地识别出动力电池的异常情况。
Power battery on-line safety early warning method and system and battery swap station
一种动力电池在线安全预警方法、系统及换电站
2022-12-06
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
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