The invention provides a
discharge method of a waste
lithium battery. The
discharge method comprises the following steps of: firstly, directly contacting a waste
lithium battery with a sacrificial
anode to obtain a pretreatment
system, immersing the pretreatment
system in a conductive
salt solution for
discharge, and finally, leading out the positive
electrode and the negative
electrode of the battery, respectively connecting the positive
electrode and the negative electrode with
copper sheets, putting the
copper sheets into the conductive
salt solution, measuring the
voltage of the battery until the
voltage value tends to be stable, and ending discharge. The sacrificial
anode can stably exist in a neutral or alkaline solution, the influence of illumination, temperature and the like is small, and the discharge condition is easy to control; the sacrificial
anode is preferentially oxidized and dissolved in the discharge process to prevent
chlorine from being separated out, so that the problem of
electrolyte leakage
pollution is effectively solved; moreover, as the sacrificial anode corresponds to the positive ions of the conducting salt, the
ion concentration of the conductive
salt solution is increased after the sacrificial anode is dissolved, the cyclic utilization of the conductive salt solution can be realized while the
discharge rate is increased, and the discharge cost is saved. The method is simple in process, easy to operate and suitable for large-scale application.