Power management method and device for automobile

The invention provides a power management method for an automobile, which belongs to the technical field of automobiles. The automobile comprises a high-voltage storage battery and a low-voltage storage battery. The power management method comprises the steps that the working state of the automobile is determined; when the working state of the automobile is a parking state and the parking duration exceeds a duration threshold value, the residual capacity of the low-voltage storage battery is monitored regularly; and the low-voltage storage battery is charged through the high-voltage storage battery according to the residual capacity of the low-voltage storage battery. Through the power management method, normal power supply of the low-voltage storage battery can be ensured. 本公开提供了一种汽车的电源管理方法，属于汽车技术领域。所述汽车包括高电压蓄电池和低电压蓄电池，所述电源管理方法包括：确定汽车的工作状态；当所述汽车的工作状态为停放状态且停放时长超过时长阈值，定期监测所述低电压蓄电池的剩余容量；根据所述低电压蓄电池的剩余容量，通过所述高电压蓄电池对所述低电压蓄电池充电。本公开通过该电源管理方法可以保证低电压蓄电池正常供电。