The invention discloses an SOC correction method for preventing power-on voltage jitter abnormity, and relates to the technical field of power batteries, and the method comprises the steps: recording a battery pack voltage difference Vo before dormancy when a vehicle enters a dormancy mode; when the vehicle enters the awakening mode from the sleep mode, the battery pack pressure difference Vi during awakening is recorded; recording the voltage difference Vn of the battery pack after waking up n seconds after the vehicle enters the waking-up mode; if Vigt; vo + Th, or Vigt; if Vn + Th is greater than Vn + Th, it is considered that voltage abnormity exists when the vehicle is awakened, and the SOC is not corrected this time; if Vi is smaller than or equal to Vo + Th and Vi is smaller than or equal to Vn + Th, it is considered that no voltage abnormity exists when the vehicle is awakened, and the SOC is corrected this time. According to the method, whether the single voltage is abruptly changed or not is judged by judging the voltage difference of the battery pack before and after power-on, the SOC is not corrected when the voltage is detected to be abnormally changed, and the situation that the SOC is mistakenly corrected due to abnormal voltage collection at the power-on moment is avoided.
本发明公开了一种预防上电电压抖动异常的修正SOC方法,涉及动力电池技术领域,在车辆进入休眠模式的时候,记录休眠前的电池包压差Vo;在车辆从休眠模式进入唤醒模式的时候,记录唤醒时的电池包压差Vi;在车辆进入唤醒模式后的n秒时,记录唤醒后的电池包压差Vn;若Vi>Vo+Th,或者Vi>Vn+Th,则认为车辆在唤醒时存在电压异常,本次不修正SOC;若Vi≤Vo+Th且Vi≤Vn+Th,则认为车辆在唤醒时不存在电压异常,本次修正SOC。本发明通过判断上电前后的电池包压差,判断单体电压是否存在突变,检测到电压异常变化时不修正SOC,避免在上电时刻因为电压采集异常导致错误修正SOC。
SOC correction method for preventing power-on voltage jitter abnormity
一种预防上电电压抖动异常的修正SOC方法
2024-08-16
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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