An electrode assembly is provided and includes: a first electrode sheet comprising a first flat and straight portion and a first tab connected to an end portion of the first flat and straight portion along a first direction; a second electrode sheet comprising a second flat and straight portion, the first flat and straight portion and the second flat and straight portion being stacked along a second direction perpendicular to the first direction; a first separator and a second separator, the first separator comprising a first separation portion, a first bent portion and a first extension portion, and the second separator comprising a second separation portion, wherein the first separation portion and the second separation portion are positioned on both sides of the second flat and straight portion along the second direction respectively, and separate the first flat and straight portion from the second flat and straight portion.

The application relates to a method for zigzag folding a material web, the method having the following steps: continuously feeding a material web to be folded into a folding apparatus along a feed direction, alternately gripping the material web in a proximal region of the folding apparatus by means of gripping devices, holding and conveying the material web by means of the gripping devices into a distal region of the folding apparatus, the material web being zigzag folded thereby, and releasing the material web from the gripping devices and depositing the material web in a stack (9) with folds in the distal region, a distance between adjacent gripping devices (4, 5) being equal to a fold length. Furthermore, the application also relates to an apparatus for zigzag folding a material web.

A manufacturing apparatus 100 includes a protruding portion molding member disposition mechanism 90, a tension damper 70, as well as an acceleration device 80, a metal roller 30 and a rubber roller 40, and a cutting mechanism 50 which serve as a laminating mechanism. A separator web 20 and an electrode web 10 are joined having the protruding portion molding member 35 interposed therebetween while the separator web 20 is bent at the portion where the protruding portion molding member 35 has been disposed, to laminate the separator web 20 and the electrode web 10.

A system and method for optimizing electrochemical cells including electrodes employing coordination compounds by mediating water content within a desired water content profile that includes sufficient coordinated water and reduces non-coordinated water below a desired target and with electrochemical cells including a coordination compound electrochemically active in one or more electrodes, with an improvement in electrochemical cell manufacture that relaxes standards for water content of electrochemical cells having one or more electrodes including one or more such transition metal cyanide coordination compounds.

An apparatus for manufacturing an electrode assembly includes a separator supply unit, table, separator guide, first adhesive supply unit, and pair of tensioners. The separator supply unit is configured for supplying a separator sheet from which a separator is formed. The table is configured for supporting electrodes and sections of the separator sheet. The separator guide is configured for guiding the separator sheet to fold in a particular folding direction. The first adhesive supply unit is configured for applying an adhesive to portions of the separator sheet and the electrodes supported by the table. The pair of tensioners are each configured for pressing an uppermost section of the separator sheet guided by the separator guide against the table or against a placed electrode that directly underlies the uppermost section. The electrode assembly is manufactured by a process using the apparatus.

A battery cell electrode alignment inspection method for inspecting an alignment state of a jelly roll configured of negative and positive electrode plates and a separator of a battery cell includes: obtaining electrode vision image data by capturing vision images of individual negative and positive electrode plates configuring the jelly roll by a vision camera; obtaining dimensional data of the individual negative and positive electrode plates; storing the obtained dimensional data of the individual negative and positive electrode plates; marking a cell barcode for identification of the jelly roll; scanning the cell barcode to receive dimensional data of individual negative and positive electrode plates; X-ray-capturing the jelly roll to obtain X-ray image data of the individual negative and positive electrode plates; and substituting the dimensional data of the individual negative and positive electrode plates to the obtained X-ray images of the individual negative and positive electrode plates.

A secondary battery has increased space utilization efficiency and can increase a capacity of an electrode assembly within a given dimension. In an exemplary embodiment, a secondary battery includes: an electrode assembly including an electrode uncoated portion; a case receiving the electrode assembly; a cap plate coupled to a top portion of the case and sealing the case; and a current collector including a terminal connector positioned between the electrode assembly and the cap plate, and an electrode connector bent at an end of the terminal connector and positioned between the electrode assembly and the case, and the electrode connector includes a first region connected to the terminal connector and protruding toward the case, and a second region positioned under the first region and protruding toward the electrode assembly.

An embodiment of the present invention provides an electrode assembly including: a plurality of first electrodes provided with one side edges connected to each other by a first fixing portion; a plurality of second electrodes provided with one side edges connected to each other by a second fixing portion and inserted between the other side edges of the first electrodes; a separator interposed between the first electrode and the second electrode; and lead tabs including a first current collecting tab connected to the first electrode and a second current collecting tab connected to the second electrode.

An electrode assembly and a rechargeable lithium battery including the same are disclosed herein. The electrode assembly includes an electrode and a separator, wherein the electrode includes a current collector, an electrode active material layer on the current collector, and an adhesive layer on the electrode active material layer; and wherein the separator has a larger surface area than the adhesive layer of the electrode; and a surface of the separator opposing the adhesive layer of the electrode is divided into an adhesive region in contact with the adhesive layer of the electrode and an overhang region not in contact with the adhesive layer of the electrode.

Any of a position of a fifth end surface of a first folded portion at a first side portion, a position of a first inner surface of the first folded portion opposite to the fifth end surface of the first folded portion, and a position of a portion between the fifth end surface and the first inner surface of the first folded portion is aligned with a position of a third end surface of a second electrode at the first side portion.