Abstract: A notching apparatus includes a punch that descends to notch an electrode, a holder having one surface in which a mounting groove is provided, the punch having one end inserted into the mounting groove, and a block inserted into the mounting groove together with the punch. When inserted into the mounting groove, the block presses the punch so that the punch comes into close contact with one of inner surfaces of the mounting groove.

Abstract: A notching mold for molding a non-coated portion of an electrode base material, wherein the non-coated portion, is formed on each of two ends of a coated portion, includes: a main mold having an upper mold and a lower mold, parallel to each other, and are slidable close to or away from each other. A first auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that the non-coated portion on one end of the electrode base material is disposed at a processible position. A second auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that, when the electrode base material is input into the main mold, the non-coated portion on the other end of the electrode base material is disposed at a processible position.

Abstract: A method for manufacturing a secondary battery includes a forming step of pressing a pouch sheet by using a press die so that left and right accommodation grooves, which are bilaterally symmetrical to each other and are opened upward, and a bridge connecting the left and right accommodation grooves to each other are formed in the pouch sheet, wherein the bridge protrudes upward with respect to bottom surfaces of the left and right accommodation grooves, and a curved portion having a rounded shape is formed on an upper end of the bridge, a seating step of seating an electrode assembly in one of the left and right accommodation grooves, and a folding step of folding the pouch sheet so that the left and right accommodation grooves face each other.

Abstract: An apparatus for manufacturing a unit cell cuts lower and upper separators between sets of adjacent electrodes. In a state of a process of manufacturing the unit cell, the lower and upper separators continuously move in a longitudinal direction; and the electrodes are stacked between the separators and on the upper separator, respectively. The apparatus includes a lower block disposed under the lower separator and an upper block vertically aligned with the lower block above the upper separator. A lower end of a cutter is installed for access to the inside and outside. The upper block descends to press the separators to a surface of the lower block. One or both of the upper and lower blocks is heated to a predetermined temperature to thermally fuse pressed points of the separators. The cutter protrudes from the upper block to perform cutting at points at which the separators are pressed.

Abstract: The present invention relates to an apparatus for manufacturing a unit cell, comprising: a first separator and a second separator configured to move in a longitudinal direction, the first and second separators configured to be cut at intervals between adjacent electrodes; a first roller positioned on a first side of the first and second separators; and second roller positioned on a second side of the first and second separators opposite the first side wherein the second roller is aligned with the first roller along an axis and defines an oval shape having a long axis and a short axis, wherein, the second roller is configured to contact the second separator and press the first and second separators against the first roller at portions of the first and second separators which are between adjacent electrodes, and at least one of the lower roller or the upper roller is heated.

Abstract: The present invention relates to a secondary battery, a method for manufacturing the same, and a pressing block for manufacturing the secondary battery. The method for manufacturing the secondary battery according to the present invention comprises a forming step of forming a pouch sheet to form an accommodation part in which an electrode assembly is accommodated, a folding step of folding the pouch sheet with respect to a folding part to accommodate the electrode assembly in the accommodation part, and to block the accommodation part from outside to form a battery case, and an anti-wrinkle step of forming an anti-wrinkle bending part on an outer shell of the pouch sheet to prevent wrinkles from being generated on the outer shell of the folded pouch sheet.

Abstract: A method of manufacturing a pouch type battery cell according to an embodiment of the present disclosure includes forming an embossing part in a part of a pouch film by using an embossing punch part. A pouch forming apparatus for forming a receiving part of the pouch film includes an embossing punch part, a die part serving as a passage through which the punch part moves, and a blank holder in contact with the embossing punch part in the die part.

Abstract: The present invention relates to a pouch for a secondary battery, in which one pouch and the other pouch are formed in a longitudinal direction, the pouch comprising: one accommodation groove and the other accommodation groove, which are formed in one surface of the one pouch and one surface of the other pouch, which correspond to each other, respectively; one reinforcing part formed on the other surface of the one pouch and configured to reinforce strength so that the other surface of the one pouch is not curled or bent in a direction of the one accommodation groove; and the other reinforcing part formed on the other surface of the other pouch and configured to reinforce strength so that the other surface of the other pouch is not curled or bent in a direction of the other accommodation groove.

Abstract: A method for manufacturing a secondary battery includes a forming step of pressing a pouch sheet by using a press die so that left and right accommodation grooves, which are bilaterally symmetrical to each other and are opened upward, and a bridge connecting the left and right accommodation grooves to each other are formed in the pouch sheet, wherein the bridge protrudes upward with respect to bottom surfaces of the left and right accommodation grooves, and a curved portion having a rounded shape is formed on an upper end of the bridge, a seating step of seating an electrode assembly in one of the left and right accommodation grooves, and a folding step of folding the pouch sheet so that the left and right accommodation grooves face each other.

Abstract: An apparatus for manufacturing a unit cell may include a first separator unwinder from which a first separator sheet is unwound, a first magazine in which a plurality of first electrodes are loaded, a first transfer part which picks up the first electrodes from the first magazine and seats the first electrodes on the first separator sheet, and a second separator unwinder from which a second separator sheet is unwound so as to cover the first electrodes. The apparatus may further include a vision sensor which detects the locations of the first electrodes, a second magazine in which a plurality of second electrodes are loaded, and a second transfer part which picks up the second electrodes from the second magazine and seats the second electrodes on the second separator sheet so as to correspond to the locations of the first electrodes, respectively.

Abstract: The present invention relates to an apparatus for manufacturing a unit cell, comprising: a first separator and a second separator configured to move in a longitudinal direction, the first and second separators configured to be cut at intervals between adjacent electrodes; a first positioned on a first side of the first and second separators, the first block including a pair of protrusions defining a recessed groove therebetween on a surface of the first block; a second block positioned on a second side of the first and second separators opposite the first side and aligned with the first block along an axis, the second block including a pair of protrusions defining a recessed groove therebetween on a surface of the second block; and a heating wire cutter disposed in any one of the recessed groove of the first block or the recessed groove of the second block.

Abstract: A pouch forming apparatus according to an embodiment of the present disclosure includes a die unit in which a forming groove is formed in a portion where a pouch film is disposed, a partition plate that divides the forming groove into at least two, and a pressing unit that presses the pouch film disposed on the die unit to form an electrode assembly-receiving part, wherein a chamfer part is formed at the lower end of the partition plate.

Abstract: A sealing apparatus for a secondary battery is disclosed, the sealing apparatus configured to seal a battery case of the secondary battery with an electrode assembly therein. The sealing apparatus comprises: a pair of sealing blocks which press the outer circumferential surface of the battery case; and a heating unit which is provided in the pair of sealing blocks and heat the pair of sealing blocks. The pair of sealing blocks comprise: lead sealing regions configured to press the lead sealing portion of the battery case; and case sealing regions configured to press the case sealing portion of the battery case. The heating unit heats the lead sealing regions and the case sealing regions of the pair of sealing blocks at different temperatures.

Abstract: A welding method includes pressing multiple objects together by a jig and irradiating the objects with laser to form multiple welded spots. The welded spots may include multiple first welded spots formed in a first direction and multiple second welded spots formed in the first direction and misaligned with the first welded spots in a second direction which is perpendicular to the first direction. A gap between the center of each of the first welded spots and the center of each of the second welded spots in the second direction. Another gap between the first welded spots in the first direction. And a gap between the second welded spots in the first direction may be greater than or equal to the radius of the second welded spot and less than or equal to a value of about 1 mm plus a diameter of the second welded spot.

Abstract: A separator sealing device includes: a first sealing unit provided with a sealing tip having a protruding shape to press a separator on an outer surface thereof, the first sealing unit rotating about a first rotation shaft; and a second sealing unit provided with a pressing surface that faces the sealing tip to press the separator on a circumference thereof, the second sealing unit rotating about a second rotation shaft, wherein, when the first sealing unit and the second sealing unit rotate, the sealing tip and the pressing surface press the separator disposed between the first sealing unit and the second sealing unit to perform the sealing of the separator.

Abstract: An electrode assembly is provided. The electrode assembly includes a separator sheet, which is formed in a single sheet shape. The separator sheet includes a first folding folded to one side and a second folding folded to the other side. The first folding and the second folding are repeated at certain intervals to form separators. Unit cells, which are formed by stacking a plurality of electrodes and the separators, are respectively disposed in a plurality of first spaces formed by the first folding of the separator sheet. Independent electrodes, are respectively disposed in a plurality of second spaces formed by the second folding of the separator sheet and have a first polarity.

Abstract: An apparatus for vacuum-drying an electrode in a roll-to-roll state according to the present technology includes a low-vacuum evacuation device configured to evacuate a vacuum chamber to a low vacuum level, a medium-high-vacuum evacuation device connected to the vacuum chamber by a medium-high-vacuum pipe separate from a low-vacuum pipe and configured to evacuate the vacuum chamber to a medium vacuum level or a high vacuum level; and a control unit connected to the low-vacuum evacuation device and the medium-high-vacuum evacuation device and configured to regulate a vacuum level in the vacuum chamber stepwise to dry the electrode.

Abstract: A power transmission unit for electrode cutting apparatuses includes a lift block, an upper frame, a connection shaft, and an elastic member. The lift block includes a structure configured to be mounted to a main frame so as to be movable upwards and downwards. An upper cutter holder is mounted to the upper frame and is fixed to an upper cutter configured to cut an electrode sheet. The connection shaft is configured to connect the lift block and the upper frame to each other. The elastic member is located at the upper part of the connection shaft.

Abstract: A cartridge type electrode cutting apparatus is configured for detachably attaching to a main body. The electrode cutting apparatus includes an upper unit disposed above an electrode sheet, a lower unit disposed under the electrode sheet, and a guide portion configured to guide upward and downward movement of the upper unit. The upper unit includes an upper cutter configured to cut the electrode sheet, an upper holder to which the upper cutter is fixed, and an upper frame to which the upper holder is mounted. The lower unit includes a lower cutter configured to cut the electrode sheet and a lower frame to which the lower cutter is fixed.

Abstract: An electrode cutting device is provided. The electrode cutting device may perform a full-width cutting process and an edge cutting process together to simplify the manufacturing process, thereby significantly improving work efficiency. Particularly, an edge of the electrode is uniformly cut to prevent defects from occurring.