A winding device and a winding method. The winding device includes a winding mechanism configured to wind an electrode plate to form an electrode assembly. The winding mechanism includes: a winding needle assembly, including an inner winding needle and an outer winding needle surrounding the inner winding needle; and a piezoelectric assembly, disposed between the outer winding needle and the inner winding needle and configured to control the outer winding needle to move relative to the inner winding needle to adjust a circumference of the outer winding needle.

A non-stop constant-speed efficient winding machine for separator relates to the technical field of lithium ion cell manufacturing. The non-stop constant-speed efficient winding machine for separator includes a base plate, an electrode feeding mechanism, a winding mechanism, a separator cutting mechanism, and a separator compounding mechanism. The winding mechanism includes a winding head and three winding needles rotatably provided on the winding head. By additionally providing the separator compounding mechanism between the electrode feeding mechanism and the winding mechanism, thermal compounding of the separator is realized, and through rolling separator cutting of the separator cutting mechanism, the separator cutting is realized. The winding needle located at the winding position can adsorb a separator end after the cutting, and wind the separator end on an outer circumferential surface of the corresponding winding needle.

Disclosed are techniques for reducing out-of-plane protrusions while singulating an electrode from a web. In some embodiments, feed rollers feed perforated web material from a roll, tear and position rollers receive a portion of the perforated web material from the feed rollers, and a servo motor changes speed of at least one of the feed rollers and tear and position rollers to thereby generate a tearing force, applied to the portion of the perforated web material, that singulates the portion in a predefined shape of an electrode.

A separator cutting apparatus includes: a fixing part configured to fix temporarily the electrode assembly; a cutter supporting part disposed above the fixing part; a cutter part disposed below the cutter supporting part, and configured to cut a separator among the electrode assembly temporarily fixed to the fixing part; and a spring part configured to connect elastically the cutter supporting part and the cutter part to each other, and return the cutter part to an initial position after cutting the separator; the spring part includes a spring bush coupled to a supporting shaft provided in the cutter supporting part and the cutter part, respectively, a spring holder integrally coupled to the spring bush, and a spring that expands and contracts according to the elevation of the cutter part by coupling both ends to the spring holder, and the spring holder and the spring bush are made of a non-metallic material.

One aspect of the present disclosure relates to an auto-splicing device for an electrode and an auto-splicing method, and more particularly, to an auto-splicing device for an electrode and an auto-splicing method, which can minimize connection defects between the running electrode and the new electrode, wherein the running electrode and the new electrode connected and supplied to the running electrode are aligned on the basis of their coating lines by using the auto-slicing device.

A rotating portion, mandrel, or spool for use with an automatic tarping equipment attachment is provided. The rotating portion, mandrel, or spool can including a central portion, a first end portion, and a second end portion. The central portion can be constructed to enhance cylindrical dimensional conformity to aid in prevention of bunching or uneven weight distribution during rolling or unrolling of a tarpaulin therefrom, and the first end portion and the second end portion can be used to reinforce end portions of the central portion.

A secondary battery semi-finished product mixed loading device for loading a secondary reel or roll according to the present disclosure includes: a rack erected vertically on ground; a tray loaded on the rack; and a stacker crane transporting the tray and loading the tray on the rack, in which the secondary battery reel or roll may be mounted on the tray.

A feeding system and a battery-cell winding apparatus. The feeding system comprises: a placement device provided with a support surface, wherein the support surface is configured for the placement of a support member; a feeding device configured to transfer the support member to the support surface; and a transfer device, which is connected to the placement device and is configured to drive the placement device to move, so as to transfer the support member onto a separator or an electrode plate, which is wound by means of a winding mechanism.

A system for transporting a separator by using an air guide roller includes an air guide roller controller and an air guide roller configured to receive a control command from the air guide roller controller and to spray the air onto one surface of a separator when the separator travels.

A lamination tape feeding system for an electrode plate substrate is provided. The lamination tape feeding system includes an input roll for inputting a lamination tape to be attached to an uncoated region of the electrode plate substrate to which an active material is applied, a plurality of guide rolls for guiding the supply of the lamination tape input, a discharge roll for discharging the guided lamination tape. The system also includes at least one crown roll that is disposed in a path of the lamination tape between the input roll and the discharge roll, disposed in the path between the guide rolls, and has a maximum height at the center of a width direction that intersects the moving direction of the lamination tape, with the height decreasing toward ends the at least one crown roll.