The invention provides a cylindrical
lithium slurry battery. The battery comprises a shell and a
battery cell accommodated in the shell, wherein the
battery cell comprises a roll core and a porous winding part wound on the roll core; the roll core is arranged at the axis of the
battery cell, and the thickness compensation part is arranged on the roll core, so that the winding part can be tightly wound around the roll core without loosening, the
structural stability of the battery is improved, the cycle life of the battery is prolonged, and the problems of
dislocation deformation, uneven thickness distribution of an
electrode plate and the like in the winding process of the battery
cell are solved; besides, a liquid changing part and a cavity for accommodating the
electrolyte are arranged in the battery, so that online maintenance operations such as
liquid injection, liquid supplementation or liquid changing can be quickly carried out on the battery, the service performance of the battery is improved, and the service life of the battery is prolonged. The invention further provides a preparation method of the cylindrical
lithium slurry battery. The method is simple and efficient to operate, low in
processing and manufacturing cost and high in process reliability.