Electrode assembly, battery cell, battery, device, manufacturing method, and manufacturing device

A method for manufacturing an electrode assembly, wherein the method comprises:

• providing at least two electrode plates, comprising a first electrode plate and a second electrode plate that are of opposite polarities;
• and
• winding the first electrode plate and the second electrode plate around a winding axis to form a multilayer structure, wherein the multilayer structure comprises an accommodation cavity extending along a direction of the winding axis, the accommodation cavity is configured to accommodate an electrolytic solution, at least one guide path extending along a first direction is formed in the electrode assembly after the winding, the first direction is a direction perpendicular to the winding axis, and the guide path is configured to guide the electrolytic solution out of the accommodation cavity,
• wherein an active material region of the first electrode plate and an active material region of the second electrode plate are wound to form a body region, the body region comprises a plurality of stacked active material portions, a non-active material region of the first electrode plate or a non-active material region of the second electrode plate is wound to form a tab region, the tab region comprises a plurality of stacked tab portions, and the accommodation cavity runs through the body region and the tab region along the direction of the winding axis,
• the plurality of tab portions comprise a plurality of consecutively arranged first tab portions, each first tab portion being provided with a plurality of first holes that run through the first tab portion along a thickness direction of the first tab portion, and the first holes of all the first tab portions are configured to be arranged opposite to each other along the first direction to form the guide path,
• in a direction from outside to inside of the electrode assembly, apertures of the plurality of first holes decrease progressively, the guide path located at an outer side of the electrode assembly is larger than at an inner side of the electrode assembly.