Abstract: A winding device includes a first unwinding apparatus, configured to output a first electrode plate; a first cutting apparatus, disposed downstream of the first unwinding apparatus, and configured to cut the first electrode plate into a first part and a second part along a length direction of the first electrode plate; and a winding apparatus, disposed downstream of the first cutting apparatus, and including a first winding portion and a second winding portion capable of simultaneous winding movement. The first winding portion is configured to wind the first part of the first electrode plate to form a first electrode assembly. The second winding portion is configured to wind the second part of the first electrode plate to form a second electrode assembly.

Abstract: The present disclosure relates to an electrode assembly, a battery cell, a battery, an electrical equipment, a winding equipment, and a method, which belongs to the battery technology field. The electrode assembly may include a first electrode plate and a second electrode plate with opposite polarity, wherein the first electrode plate and the second electrode plate may be stacked and wound along the winding direction to form the electrode assembly, wherein the first electrode plate may include a first segment and a second segment, wherein the first segment may be provided with a first active substance layer, and the second segment may be provided with a second active substance layer, and the first segment may be located upstream of the second segment along the winding direction from inside to outside.

Abstract: A winding device and a material winding method are provided. The winding device is configured to wind a material and includes: a winding switching mechanism, a compounding mechanism and a breaking mechanism. The winding switching mechanism includes a rotating disc and a plurality of winding pins arranged on the rotating disc at intervals. The material is wound around one winding pin along a preset path. The compounding mechanism is provided upstream of the winding pin along the preset path and configured to laminate and then compound the plural layers of materials at a preset position. The breaking mechanism is provided between the compounding mechanism and any winding pin along the preset path and configured to break the compounded plural layers of materials at a compounding region.