Method, apparatus, storage medium and terminal equipment for estimating the impedance of battery

A method for estimating the impedance of a battery includes: obtaining an impedance matrix of the battery, wherein the value of an element of the impedance matrix represents the impedance of the battery and its coordinate in the impedance matrix represents its temperature and quantity of electric charge; detecting the impedance of the battery to obtain a first impedance when its temperature is a first temperature and its quantity of electric charge is a first quantity of electric charge; and updating the impedance matrix of the battery according to the distances between the coordinate formed by the first temperature and the first quantity of electric charge and the coordinates of each element in the impedance matrix, and the first impedance. A second impedance may also be obtained at a second temperature and a second quantity of charge. The method may be used with a lithium-ion battery.