The invention discloses a battery voltage drop identification method for a power battery, and the method comprises the steps: recording the voltage of each string of modules at preset intervals when a vehicle is in a charging mode or a standing mode; calculating a voltage difference value of each string of modules at two adjacent recording moments; according to the voltage difference value of the current string module at two adjacent recording moments and the voltage difference value of the current string module and other string modules, judging whether the battery cell corresponding to the current string module is abnormal or not; and if so, reporting a failure fault of the battery cell. According to the battery voltage drop identification method of the power battery, power battery voltage drop calculation is carried out on each string of modules every preset time, and according to the voltage self-ratio of the string of modules at two adjacent recording moments and the voltage difference comparison of the string of modules with other string of modules, abnormal and invalid battery cells are accurately identified, and the possibility of false alarms is eliminated; the state of the battery is monitored in the vehicle charging or standing process, the serious failure condition of the battery is reported to remote monitoring in time, and a sensor or a monitoring board is not needed.
本发明公开了一种动力电池的电池压降识别方法,包括:在车辆处于充电模式或静置模式下,每隔预设时间记录各串模块的电压;计算各串模块在相邻两个记录时刻的电压差值;根据当前串模块在相邻两个记录时刻的电压差值和当前串模块与其他串模块的电压差值的差值,判断当前串模块所对应的电芯是否异常;若异常,则上报电芯失效故障。本发明的动力电池的电池压降识别方法,每隔预设时间对各串模块进行动力电池压降计算,根据串模块在相邻两个记录时刻的电压自比和与其他串模块的电压差值互比,准确识别异常失效电芯并排除误报的可能,在车辆充电或静置过程中监控电池的状态,将电池的严重失效情况及时上报远程监控,且不需要传感器或监控板。
Battery voltage drop identification method of power battery
动力电池的电池压降识别方法
2022-11-15
Patent
Electronic Resource
Chinese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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