The invention discloses a vehicle-mounted power battery health degree evaluation method and system and a medium. The method comprises the steps of collecting, storing and transmitting vehicle operation data; the data platform and the automobile end estimate the health state of the power battery by adopting a Gaussian distribution method based on the voltage temperature extreme value and the standard deviation of the power battery and the SOC change value; the estimation result is displayed at the automobile end; and the estimation result of the data platform is periodically utilized to correct the estimation of the automobile end. According to the method, the model is constructed in a cloud and vehicle end double-end estimation comparison calibration mode, and the charging SOC change rate, the power battery voltage, the temperature extreme value and the standard deviation thereof are taken as evaluation indexes of the power battery health degree, so that the indexes capable of directly representing the power battery health degree are covered; in addition, the charging quantity of the new energy automobile is integrated by adopting a line segment integration method, so that the obtained charging quantity is more accurate.
本发明公开了一种车载动力电池健康度评估方法、系统及介质。该方法包括采集、存储和传输车辆运行数据;数据平台与汽车端分别基于动力电池电压温度极值与标准差、SOC变化值,采用高斯分布方法对动力电池健康状态进行估计;在汽车端进行估计结果的显示;周期性利用数据平台的估计结果对汽车端的估计进行校正。本发明采用云端、车端双端估计对比校准的方式进行模型的构建,以充电SOC变化速率、动力电池电压、温度极值及其标准差作为动力电池健康度的评价指标,涵盖了可直接表征动力电池健康程度的指标,此外还采用线段积分的方法将新能源汽车充电电量进行了积分,所得充电量更为精确。
Vehicle-mounted power battery health degree evaluation method and system and medium
车载动力电池健康度评估方法、系统及介质
2022-12-09
Patent
Electronic Resource
Chinese
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