The invention provides an SOC correction method and correction equipment for a vehicle power battery. The SOC correction method comprises the following steps: acquiring an SOC-OCV curve of the vehiclepower battery; determining an operation range of an SOC correction strategy according to an SOC range of a slope region in the obtained SOC-OCV curve; determining an SOC operation balance interval ofthe vehicle power battery under the real vehicle working condition; an SOC correction strategy of a vehicle power battery is linked with a control strategy of a vehicle control unit; and establishinga mapping function of the SOC true value and the SOC display value of the vehicle power battery, and ensuring that when the SOC display value is located in the SOC operation balance interval, the SOCtrue value corresponding to the SOC display value is located in the SOC range of the slope region in the SOC-OCV curve so as to facilitate SOC correction. According to the SOC correction method, mapping function processing is carried out on the SOC according to the SOC-OCV curve characteristics of the vehicle power battery in combination with the control strategy of the vehicle control unit, errors accumulated by the SOC of the vehicle power battery can be frequently corrected, and the SOC precision of the vehicle power battery can be improved.
本发明提供了一种车用动力电池的SOC修正方法及修正设备,SOC修正方法包括以下步骤:获取车用动力电池的SOC‑OCV曲线;根据获取的SOC‑OCV曲线中的斜率区的SOC范围,确定SOC修正策略的运行范围;确定实车工况下车用动力电池的SOC运行平衡区间;将车用动力电池的SOC修正策略与整车控制器的控制策略进行联动,建立车用动力电池的SOC真实值与SOC显示值的映射函数,确保SOC显示值位于SOC运行平衡区间时,其对应的SOC真实值处于SOC‑OCV曲线中斜率区的SOC范围,以便于进行SOC校正。本发明的SOC修正方法,针对车用动力电池的SOC‑OCV曲线特征,结合整车控制器的控制策略,对SOC进行映射函数处理,能够经常对车用动力电池SOC累积的误差进行修正,有利于提高车用动力电池的SOC精度。
SOC correction method and correction equipment for vehicle power battery
车用动力电池的SOC修正方法及修正设备
2020-06-16
Patent
Elektronische Ressource
Chinesisch
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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