Abstract: The present invention relates to a method for inspecting a welding quality of an electrode tab-electrode lead welded portion of a pouch-type lithium secondary battery, and the method includes: recognizing welding traces of the welded portion by a vision inspection device; measuring a size of each of the recognized welding traces; and determining whether the welded portion has been weakly welded, excessively welded or normally welded by comparing the measured size with a reference value.

Abstract: An apparatus for manufacturing an electrode according to an embodiment of the present invention includes a pattern formation mechanism configured to form a pattern groove in an electrode, the electrode including an electrode collector and a coating part made of an electrode active material applied on at least one surface of the electrode collector. The pattern formation mechanism presses a surface of the coating part to form the pattern groove, the pattern groove being an intaglio pattern in the coating part. Related methods for manufacturing the electrode and the electrode manufactured thereby are provided.

Abstract: The present invention provides a sealing process for a secondary battery of the present invention, which thermally fuses and seals a sealing portion that extends along an edge surface of a battery case, the sealing process comprising: an arrangement operation of disposing the sealing portion of the battery case between an anvil and a horn; a first region-fixing operation of pressing and fixing a first region of the sealing portion through the anvil and the horn; and a first region-primary sealing operation of applying an ultrasonic wave to the first region of the sealing portion through the horn at a set frequency and a set amplitude for a set time, thereby thermally fusing the first region of the sealing portion.

Abstract: The present invention provides an apparatus for manufacturing a unit cell, in which a lower separator and an upper separator continuously move in a longitudinal direction, and the lower separator and the upper separator are cut between electrodes adjacent to each other in a process of manufacturing the unit, which is provided in a state in which the electrodes are stacked between the lower separator and the upper separator and on the upper separator, respectively, the apparatus comprising: a fixed part disposed under the lower separator and heated to a predetermined temperature; a movable part aligned with the fixed part in a vertical direction on the upper separator; and a cutter coupled to the movable part, heated to a predetermined temperature, and configured to cut the upper separator and the lower separator, wherein the lower separator and the upper separator are thermally fused between the fixed part and the movable part and cut by the cutter while passing between the fixed part and the movable part.

Abstract: A connector assembly having a moving plate to protect terminals and maintain alignment within a first connector is provided. The connector assembly includes a first connector having a coupling space formed therein and having a plurality of first terminals disposed in the coupling space, a moving plate movably installed in the coupling space and having a terminal hole through which the first terminal passes, and a second connector coupled to one side of the first connector and having a holder moving the moving plate in the coupling space. A cam groove is formed in an external surface of the moving plate. A moving pin, insertable and movable in the cam groove, is formed on the holder, and when the moving plate and the holder are coupled, the moving plate moves in a direction, perpendicular to a coupling direction.

Abstract: A secondary battery includes an electrode assembly having a positive electrode provided with a positive electrode tab, a separator, and a negative electrode provided with a negative electrode tab, the positive electrode, the separator, and the negative electrode being wound, the electrode assembly having a core part at a center thereof; a can configured to receive the electrode assembly therein, the negative electrode tab being connected to the can; a cap assembly coupled to an opening of the can, the positive electrode tab being connected to the cap assembly; and a reinforcing member provided on an end of the separator exposed beyond the positive electrode or the negative electrode to prevent heat of the positive electrode tab or the negative electrode tab from being transferred to the separator.

Abstract: A connector assembly has a movable plate for protecting terminals and maintaining alignment in a first connector. The connector assembly includes a first connector having a coupling space formed therein and having a plurality of first terminals disposed in the coupling space, a moving plate movably installed in the coupling space and having a terminal hole through which the first terminal passes, and a second connector coupled to one side of the first connector and moving the moving plate in the coupling space. A step portion is formed on the inner surface of the first connector. A hinge portion is formed on a side surface of the moving plate to rotate at a predetermined angle, and an end of the hinge portion can be locked or released from the step portion.

Abstract: An apparatus for preparing a unit cell is provided. The apparatus includes a center electrode reel from which a center electrode sheet is unwound, wherein the center electrode sheet is configured to form a plurality of center electrodes, separator reels from which separator sheets to be stacked with the center electrodes are unwound, a laminator configured to laminate a stack which is formed by stacking the plurality of center electrodes with the separator sheets while the plurality of center electrodes are spaced apart from each other and disposed in a row in a longitudinal direction of the separator sheets, a first nozzle configured to apply an adhesive to an upper surface of the separator sheet disposed on an uppermost layer of the laminated stack, and an upper electrode reel from which an upper electrode sheet is unwound.

Abstract: Embodiments relate to a method and a device for switching media service channels, which minimize the time required to detect the first I frame for a switch channel by utilizing a caching server when switching channels in an IP-based media service, such as IPTV, and at the same time, minimize the time required for synchronization by changing time information in caching information transmitted from the caching server, such that channel switching between media service channels can be performed more quickly.

Abstract: An apparatus for manufacturing a secondary battery is provided. The apparatus comprises a separation sheet supply device configured to supply two separation sheets configured to be disposed vertically. An electrode supply device is configured to supply electrodes to be disposed between the two separation sheets and on a top surface of one of the separation sheets. The one of the separation sheets is disposed at an upper side. A lamination device is configured to bond the two separation sheets and the electrodes to each other. An ultrasonic cutting device is configured to bond surfaces of the two separation sheets to each other and simultaneously cut a bonding surface of the two separation sheets.

Abstract: An electrode assembly manufacturing apparatus includes an electrode sheet supply unit for supplying an electrode sheet on which electrode mixture coating and non-coating portions are formed, a cutting unit at the rear of the supply unit for forming an electrode tab at the electrode sheet, and a lamination unit at the rear of the supply unit and configured to laminate positive and negative electrodes stacked with a separator between them. A cutting unit die supports the electrode sheet and an ultrasonic cutter spaced from the die forms the tab. A cutting line of a cutting edge of the cutter corresponds to a periphery of a unit electrode in a tab forming direction. The cutting and lamination units are on the same line in a continuous process to reduce a necessary space for electrode assembly manufacture and prevent electrode sheet foil deformation and electrode mixture layer damage in the cut section.

Abstract: A secondary battery includes: an electrode assembly; an electrode lead; a battery case with an accommodation portion for the electrode assembly and a sealing portion sealing the accommodation portion; and a lead film. The sealing portion includes a connection-sealing region connected to the accommodation portion, a front end-sealing region, and a reinforcement-sealing region therebetween. The reinforcement-sealing region includes a compressed surface, provided in the sealing portion between the connection-sealing region and the front end-sealing region and recessed into the sealing portion, and raised surfaces, provided in the sealing portion between the connection-sealing region and the compressed surface and between the front end-sealing region and the compressed surface and each of which is formed thicker than the compressed surface. The battery case has a resin layer, a metal layer, and an insulating layer.

Abstract: In an embodiment an electrical connector includes an earth terminal including a wire terminal contact part and a ground fixing part integrally formed with the wire terminal contact part and a connector housing including a housing body in which the wire terminal contact part is placeable and a terminal cover part located at an outer side of the housing body and configured to surround the ground fixing part.

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: An ultrasonic welding device for a secondary battery is provided. The ultrasonic welding device is configured to weld an overlapping surface of an electrode tab and an electrode lead in an electrode assembly. The ultrasonic welding device includes an anvil on which the overlapping surface of the electrode tab and the electrode lead are disposed. A horn is configured to apply ultrasonic waves to the overlapping surface of the electrode tab and the electrode lead while pressing the overlapping surface. The overlapping surface is disposed on the anvil. An electrode tab measuring part is configured to measure a thickness of the electrode tab disposed on the overlapping surface. A pressure adjusting device is configured to adjust a pressure applied to the overlapping surface by the anvil and the horn according to the thickness value of the electrode tab. The thickness value is measured by the electrode tab measuring part.

Abstract: A method for manufacturing a secondary battery includes: an accommodating process of accommodating an electrode assembly in a battery case so that an electrode lead connected to the electrode assembly protrudes to both sides of the outside of the battery case; a sealing process of sealing an outer circumferential surface of the battery case after the accommodating process; a coupling process of coupling a coupling clip to the electrode lead after the sealing process; and a transfer process of transferring the cell to a position for a next process after a gripper grips the coupling clip after the coupling process.

Abstract: An ultrasonic welding device includes an anvil provided so that an overlapping surface of an electrode tab and an electrode lead, which are provided in an electrode assembly, are configured to be disposed thereon; a horn configured to weld the overlapping surface disposed on the anvil; and an inspection member configured to inspect a horizontal level of an opposing member with respect to the overlapping surface, based on an overlapping surface horizontal value that is a horizontal value of the overlapping surface with respect to a predetermined reference surface and an opposing horizontal value that is a horizontal value of the opposing member, which is one of a welding part of the horn configured to face the overlapping surface and a disposing part of the anvil, on which the overlapping surface is configured to be disposed, with respect to the predetermined reference surface.

Abstract: The present invention provides a sealing process for a secondary battery of the present invention, which thermally fuses and seals a sealing portion that extends along an edge surface of a battery case, the sealing process comprising: an arrangement operation of disposing the sealing portion of the battery case between an anvil and a horn; a first region-fixing operation of pressing and fixing a first region of the sealing portion through the anvil and the horn; and a first region-primary sealing operation of applying an ultrasonic wave to the first region of the sealing portion through the horn at a set frequency and a set amplitude for a set time, thereby thermally fusing the first region of the sealing portion.

Abstract: An electrode assembly having a jelly-roll type structure in which a first electrode current collector, a second electrode current collector, and a separator located between the first electrode current collector and the second electrode current collector are wound in one direction. At least one of the first electrode current collector or the second electrode current collector includes an uncoated portion exposed to outside of the separator. A cutting line is provided in the axial direction of the electrode assembly in the at least one of the uncoated portion. The uncoated portion in which the cutting line is provided is divided into a remaining area remaining to protrude in a winding axis direction and a bent target area bent in a preset direction. At least a part of the uncoated portion included in the bent target area is bent to have a plurality of layers overlapping in a bending direction.

Abstract: An apparatus for preparing a cell is provided. The apparatus includes an electrode reel from which an electrode sheet is unwound, wherein the electrode sheet is configured to form a plurality of electrodes, a separator reel from which a separator sheet is unwound, wherein the separator sheet is configured to stack with the electrode while covering the electrode by being folded when the electrode is stably placed, a table having an upper surface on which the electrode and the separator sheet are stably placed, and a nozzle configured to apply an adhesive to at least a portion of a region of the separator sheet stably placed on the table.