Abstract: The present invention relates to a method for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery. The method for manufacturing the secondary battery according to the present invention comprises: an electrode supply process of supplying an electrode through an electrode supply part; a first inspection process of detecting the supplied electrode to distinguish a normal electrode portion and an abnormal electrode portion through the first inspection part; and a notching process of notching the electrode, which is subjected to the first inspection process, in the notching part, wherein the notching process perform the notching through a laser so that the normal electrode portion and the abnormal electrode portion, which are detected in the first inspection process, are divided from each other.

Abstract: A sheet cutting and fusion apparatus including upper and lower cutters at uppermost and lowermost surfaces, respectively, of a plurality of overlapping sheets. The upper and lower cutters includes first and second cutting surfaces configured for contacting the lower cutter without any step when the upper cutter is moved vertically and the upper cutter without any step when the lower cutter is moved vertically, respectively; first and second fusion portions parallel to the first cutting surface and to the second cutting surface, respectively; first and second steps extending between the first cutting surface and first fusion portion and extending between the second cutting surface and second fusion portion, respectively; lower and upper surfaces configured to face one of the sheets, respectively; and first and second connection portions each having a curved corner connecting the lower surface and first fusion portion and connecting the upper surface and second fusion portion, respectively.

Abstract: An apparatus for manufacturing unit cells includes reels, rollers, conveyors, headers, and a cutter. A lower separator sheet is unwound from a lower separator reel. A feeding roller moves the lower separator sheet in a first direction. A conveyor moves a first electrode in a second direction parallel to the first direction. A first header conveys that electrode from the conveyor and onto the lower separator sheet. An upper separator sheet is unwound from an upper separator reel. Another feeding roller moves, in the first direction, a first ordered stack of the lower separator sheet, first electrode, and upper separator sheet. Another conveyor moves a second electrode in the second direction. Another header conveys that electrode from the second conveyor and onto the upper separator sheet. The cutter cuts, at preset intervals, a second ordered stack of the lower separator sheet, first electrode, upper separator sheet, and second electrode.

Abstract: The present technology relates to an apparatus for cutting an electrode of a battery, and the apparatus includes: an all-in-one cutting cartridge module including an upper knife and a lower knife; and a cradle where the all-in-one cutting cartridge module is mounted. Herein, the all-in-one cutting cartridge module includes a module frame and an upper knife holding unit which fixes and supports the upper knife and is supported in a manner that is vertically slidable on the module frame, and the lower knife is coupled to a lower portion of the module frame to face the upper knife. The assembly work is very simple in the electrode cutting apparatus of the present invention. Further, since the upper knife and the lower knife are installed at the module cartridge, it is possible to quantitatively adjust the clearance and straightness of the upper knife and the lower knife in advance.

Abstract: The present technology relates to a method for connecting electrode sheets in a roll-to-roll process, and the method includes: arranging a flexible connection sheet of a predetermined length between a first electrode sheet and a second electrode sheet; connecting the first electrode sheet to the flexible connection sheet by attaching one side of the first electrode sheet to one side of the flexible connection sheet using a first tape; and connecting the second electrode sheet to the flexible connection sheet by attaching one side of the second electrode sheet to the other side of the flexible connection sheet using a second tape. Further, the present technology relates to an electrode sheet manufactured by manufactured by the method of connecting electrode sheets.

Abstract: Discussed is an including a transfer unit transferring an electrode sheet having a plurality of notching grooves formed in a side surface thereof to a cutting point via a measuring point, wherein, when a front notching groove which is disposed at a front end in the electrode sheet is passing through the cutting point, a notching groove disposed in a rear end of the front notching groove is configured to pass through the measuring point; a detection unit at the measuring point to detect the notching groove passing through the measuring point and generating a notching groove detection signal; and a cutting unit at the cutting point to cut the electrode sheet according to the notching groove detection signal generated by the detection unit.

Abstract: Discussed is a notching apparatus and method for a secondary battery. The notching apparatus includes: a notching unit notching a portion of an electrode that is continuously supplied; a drying unit drying the electrode while the electrode discharged from the notching unit passes therethrough; and a collecting unit collecting the electrode discharged from the drying unit, wherein the drying unit includes a heating body provided with a drying space that is a passage through which the electrode passes therein, and lamp parts mounted on the heating body to irradiate infrared rays onto a surface of the electrode while the electrode moves through the drying space.

Abstract: The present invention relates an electrode notching apparatus. The electrode notching apparatus comprises: a notching unit shaping an electrode into a predetermined pattern; a heating unit drying the electrode processed by the notching unit; and a collecting unit collecting the electrode dried by the heating unit, wherein the heating unit comprises: a heating body having a drying space through which the electrode supplied by the notching unit passes; and heating members directly heating a surface of the electrode passing through the drying space to dry moisture remaining on the electrode.

Abstract: An electrode assembly manufacturing apparatus includes a stack table, a separator supply unit, first and second electrode supply units, and a side sealing device. A stack of a first electrode, a second electrode, and a separator between the first and the second electrode are stackable on the stack table. The separator supply unit is configured for supplying the separator to the stack table. The first electrode supply unit is configured for stacking the first electrode on a section of the separator on the stack table. The second electrode supply unit stacks the second electrode on a further section of the separator on the first electrode. A side sealing device heats at least one side surface of the stack.

Abstract: An electrode assembly manufacturing method includes the steps of: assembling an electrode stack; performing a primary heat press operation on the electrode stack; then performing a pre-heating operation on the electrode stack; and then performing a secondary heat press operation on the electrode stack. The pre-heating operation may include applying heat and pressure to the electrode stack for a time period from 10 seconds to 40 seconds under a pressure condition from 0.5 MPa to 2 MPa and under a temperature condition from 50° C. to 85° C. The pressure condition applied in the pre-heating operation may include applying a lower pressure than that applied in the primary and secondary heat press operations. The primary heat press operation may include engaging the electrode stack with a gripper to secure a position of the electrode stack, which gripper may be disengaged from the electrode stack before performing the pre-heating operation.

Abstract: An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. An intermediate one of the separator portions may be adhered to an intermediate one of the electrodes such that it would take a peel force in a range from 5 gf to 35 gf per 20 mm width applied to an edge of the intermediate separator portion in order to peel it away from the intermediate electrode at a speed of 100 mm/min along the stacking axis. Moreover, top and bottom ones of the separator portions may each have a value of air permeability from 70 sec/100 ml to sec/100 ml per square inch of the respective separator portion at a pressure of 0.05 MPa and at room temperature.

Abstract: An electrode assembly includes a stack and a second separator. The stack includes first and second electrodes and a first separator folded in a zigzag configuration and including spacer sections and respective side sections between the spacer sections. The first and the second electrodes are alternately disposed between first separator spacer sections The second separator extends along an upper surface, a lower surface, and at least one pair of opposing side surfaces of the stack. The side sections of the first separator define portions of the side surfaces of the stack on which the first electrode and the second electrode are not disposed. The second separator is bonded to at least one of the side sections.

Abstract: An electrode assembly manufacturing apparatus for fabricating a stack includes a stack table, gripper, and first press unit. The stack includes a first electrode, a second electrode, and a section of a separator between the first and the second electrodes. The stack table is configured for supporting the stack. The gripper is configured for fixing the stack. The first press unit is configured for heating and compressing the stack fixed by the gripper.

Abstract: An electrode assembly manufacturing method includes the steps of: assembling an electrode stack; performing a primary heat press operation on the electrode stack while engaging the electrode stack with a gripper; and then performing a secondary heat press operation on the electrode stack while the gripper is disengaged from the electrode stack. The secondary heat press operation may include applying heat and pressure to the electrode stack for a time period from 5 seconds to 60 seconds under a temperature condition from 50° C. to 90° C. and under a pressure condition from 1 Mpa to 6 Mpa. The step of assembling the electrode stack may include alternately stacking first and second electrodes on an elongated separator sheet, and sequentially folding the separator sheet over a previously-stacked one of the electrodes before a subsequent electrode is stacked. An apparatus for performing the manufacturing method is also disclosed.

Abstract: An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. The plurality of electrodes include a top electrode positioned at a top of the stack along the stacking axis, and the plurality of electrodes include a bottom electrode positioned at a bottom of the stack. The separator portions in the stack include a top separator portion abutting the top electrode and a bottom separator portion abutting the bottom electrode. The top separator portion and the bottom separator portion each have a value of air permeability from 80 sec/100 ml to 120 sec/100 ml per square inch of the respective separator portion at a pressure of 0.05 MPa and at room temperature.

Abstract: An electrode assembly includes a plurality of electrodes arranged in a stack along a stacking axis with a respective separator portion of an elongated separator sheet positioned between and winding around each of the electrodes in the stack along a serpentine path. The plurality of electrodes include a top electrode positioned at a top of the stack along the stacking axis, and the plurality of electrodes include a bottom electrode positioned at a bottom of the stack. The separator portions in the stack include a top separator portion abutting the top electrode and a bottom separator portion abutting the bottom electrode. The bottom electrode may have a thickness along the stacking axis that is from 80% to 120% of a thickness of the top electrode along the stacking axis. Moreover, a maximum thickness of each of the electrodes in the stack may be less than 8.3 mm.

Abstract: Discussed is an electrode manufacturing method, in which laser ablation is performed prior to cutting an electrode sheet so that a processing speed of cutting the electrode sheet by using laser is increased, and an electrode forming device for performing same.

Abstract: Disclosed are a pouch film shaping apparatus including a preheating lamp configured to preheat a metal barrier layer of a pouch film in order to increase stretching force of the pouch film and a pouch film shaping method.

Abstract: The present invention relates to a method for manufacturing a secondary battery. The method for manufacturing the secondary battery comprises: an electrode preparation step of preparing electrodes, each of which is provided with a coating portion coated with an electrode active material and a non-coating portion that is not coated with the electrode active material; an electrode assembly manufacturing step of alternately stacking the electrodes and separators to manufacture an electrode assembly, wherein the electrodes are stacked so that the non-coating portions overlap each other; a non-coating portion bonding step of bonding the non-coating portions to each other; a display part formation step of forming a display part for setting a cutting point on a surface of the bonded non-coating portion of each of the electrodes; and an electrode tab manufacturing step of cutting the bonded non-coating portion adjacent to the display part to manufacture an electrode tab.

Abstract: A method of manufacturing a cylindrical includes manufacturing an electrode assembly having a jelly roll structure by preparing a positive electrode plate, a negative electrode plate, and a separator, and by interposing the separator between the positive electrode plate and the negative electrode plate, and then spiral-winding the positive electrode plate, the negative electrode plate, and the separator; and drying the electrode assembly after manufacturing the electrode assembly. The drying of the electrode assembly may include a hot air circulating drying step. A drying apparatus is also provided.