The invention provides a vehicle end
power battery lithium precipitation online monitoring method. The method comprises the following steps: acquiring
battery voltage data in a standing state after a battery is charged in a vehicle end or battery swap
station scene, and calculating the
voltage deviation degree at each moment according to the acquired
voltage data; and when the calculated
voltage deviation degree corresponding to a certain moment is greater than the voltage deviation degree at the previous moment, triggering the calculation of the voltage change trend of the battery, and judging whether
lithium is separated from the battery or not according to the calculated voltage change trend. By means of the method, the voltage data of the battery can be accurately acquired and the voltage deviation degree can be calculated by utilizing the standing state after the battery is charged in a vehicle end or battery swap
station scene, so that the calculation of the voltage change trend can be triggered according to the voltage deviation condition, and the nondestructive detection of the
lithium precipitation of the battery core can be accurately and efficiently realized. The method is short in time, low in cost, high in efficiency, good in accuracy and relatively high in practical application value.