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.

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 present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

The present application discloses an electrode assembly including: a first electrode sheet including an insulating substrate, an electricity-conducting layer arranged on a surface of the insulating substrate, and an active material layer coating on a surface of the electricity-conducting layer, in which the first electrode sheet is bent to form a multi-layer structure and includes a plurality of bending segments and a plurality of first layer-stacking segments arranged to be stacked, and each of the bending segments is configured to connect two adjacent first layer-stacking segments; a second electrode sheet, in which a polarity of the second electrode sheet is opposite to a polarity of the first electrode sheet, and the second electrode sheet includes a plurality of second layer-stacking segments, the plurality of second layer-stacking segments and the plurality of first layer-stacking segments are alternately arranged in a layer-stacking direction of the first layer-stacking segments.

The present application discloses an electrode assembly including: a first electrode sheet including an insulating substrate, an electricity-conducting layer arranged on a surface of the insulating substrate, and an active material layer coating on a surface of the electricity-conducting layer, in which the first electrode sheet is bent to form a multi-layer structure and includes a plurality of bending segments and a plurality of first layer-stacking segments arranged to be stacked, and each of the bending segments is configured to connect two adjacent first layer-stacking segments; a second electrode sheet, in which a polarity of the second electrode sheet is opposite to a polarity of the first electrode sheet, and the second electrode sheet includes a plurality of second layer-stacking segments, the plurality of second layer-stacking segments and the plurality of first layer-stacking segments are alternately arranged in a layer-stacking direction of the first layer-stacking segments.

A flexible battery may include: a first electrode assembly including one or more unit cells, each having a pair of electrodes with a separator interposed therebetween; a single electrode; and a second electrode assembly connected to the first electrode assembly or to the single electrode and including a single electrode and a separator covering a top and bottom of the single electrode of the second electrode assembly.

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.

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 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.