Abstract: An electrode assembly includes a radical unit in which electrodes and separators are alternately stacked, the radical unit having a structure in which one electrode is stacked at the uppermost end. An auxiliary unit is provided with a separation sheet disposed at the uppermost end side of the radical unit. The separation sheet includes a separation part disposed at the uppermost end side of the radical unit and a side surface protection part connected to each of side surfaces of the separation part and folded to contact a side portion of the radical unit to cover the side portion of the radical unit.

Abstract: A multilayer conductive tape includes an adhesive layer, an electrically conductive layer positioned on one side of the adhesive layer, an insulating layer positioned on one side of the electrically conductive layer, and a protective layer for protecting an outer surface of the insulating layer.

Abstract: A pouch type secondary battery includes a pouch type battery case including an electrode assembly housing portion and a sealing portion. An electrode assembly is housed in the housing portion, and an insulation coating layer is laminated on the sealing portion. The insulation coating layer includes a binder and heat-dissipating particles having a thermal conductivity of 0.2 W/(mk) or more.

Abstract: The present invention relates to a sealing device for a secondary battery. The sealing device is configured to seal a battery case accommodating an electrode assembly therein to manufacture the secondary battery, the sealing device including a sealing block configured to press a sealing portion of the battery case, a flatness adjusting part configured to adjust a flatness of a pressing surface of the sealing block, and a heater part configured to transfer heat to the sealing block to thermally fuse the sealing portion of the battery case when the sealing portion is pressed by the sealing block.

Abstract: The secondary battery according to the present invention may comprise the separator pocket part having the accommodation groove in which the first electrode plate is accommodated and a radical unit provided as the second electrode plate disposed on one surface of the separator pocket part to secure the stacking property, safety, and insulation.

Abstract: The present invention relates to a system for circulating a slurry including, a coating die for applying a electrode active material slurry on the current collector; a tank for supplying the electrode active material slurry to the coating die; and a circulation piping for connecting the coating die and the tank, wherein the slurry circulates through the circulation piping connected from at least one of the left surface, the right surface, the rear surface, and the lower surface of the coating die to the tank at the time of a line stop.

Abstract: A notching apparatus and method for an electrode substrate can improve the conventional problem of contamination of an electrode current collector by forming a punching oil supply hole in a punch and applying the punching oil to a wall surface of the punch through the punching oil supply hole, and can also discharge foreign objects generated when punching an electrode through the hole formed in the punch. The notching apparatus for the electrode substrate includes a die member on which the electrode substrate is disposed; and a punch member provided to be spaced above the die member and provided with a punch that moves up and down toward the die member. A wall surface of the punch is provided with one or more punching oil supply holes for applying the punching oil to an outer surface of the punch.

Abstract: A drying device for manufacturing an electrode comprises a dryer and a transfer part. The dryer is configured to dry a coated portion of an electrode base material when an electrode slurry is applied to the coated portion on at least one surface and not applied to an uncoated portion. The transfer part includes a floating part and a traveling part coupled to an outlet of the dryer. The floating part includes an air floating plate and is configured to float the electrode base material using air. The traveling part is configured to move the electrode base material in a process direction. A method for manufacturing an electrode includes drying an electrode base material in which electrode slurry is applied on a least one surface of the electrode base material at a high temperature, and floating and transferring the electrode base material using air.

Abstract: A negative electrode for a lithium secondary battery and a method of manufacturing the negative electrode including a negative electrode current collector and a negative electrode mixture layer on at least one surface of the current collector. The negative electrode is manufactured by controlling a static water contact angle of a surface of a negative electrode current collector and an contact angle formed by an end portion of a negative electrode mixture layer and the negative electrode current collector, within a specific range by treating the surface of the negative electrode current collector with atmospheric pressure plasma. The adhesion between the negative electrode current collector and the negative electrode mixture layer may be improved, and the induction of a reversal of an N/P ratio between a positive electrode and a negative electrode in an electrode assembly and the occurrence of unrolling in the negative electrode mixture layer may be prevented.

Abstract: A charge/discharge device for an activation process of a secondary battery including an accommodation structure having a plurality of accommodation spaces and provided with a wiring duct at one side of each of the accommodation spaces, each of a plurality of charge/discharge boxes installed in each of the plurality of accommodation spaces, wires wired in a space inside the wiring duct, and an exhaust fan installed on an inner wall of the wiring duct, in which the exhaust fan is installed on the inner wall of the wiring duct adjacent to one side of the accommodation space, and the wires are wired to pass an external side of the exhaust fan is provided. A heat insulation panel may be additionally installed together with the exhaust fan in the wiring duct.

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: A secondary battery charging and discharging apparatus for performing a secondary battery activation process including a plurality of compression plates disposed to face each other to form a cell insert space therebetween in which a secondary battery cell is disposed, the plurality of compression plates moving to reduce a gap therebetween to press a body of the secondary battery cell; gripper units respectively mounted to the compression plates to move integrally with the compression plates, the gripper units coming into contact with an electrode lead of the secondary battery cell when the compression plate presses the body of the secondary battery cell; and push bar units respectively mounted to the compression plates to be adjacent to the gripper units and configured to press a terrace portion of the secondary battery cell adjacent to the electrode lead is provided.

Abstract: An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit is repeatedly disposed and has same number of electrodes and separators which are alternately disposed and integrally combined, or (b) a structure in which at least two kinds of radical units are disposed in a predetermined order, and an auxiliary unit disposed on at least one among an uppermost part or a lowermost part of the cell stack part. The one kind of radical unit of (a) has a four-layered structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked, and each of the at least two kinds of radical units are stacked by ones in the predetermined order to form the four-layered structure or the repeating structure.

Abstract: A degassing device includes a piercing unit including a piercing body configured to be disposed on a first surface of the secondary battery to seal one side of the first surface of the secondary battery, and a piercing member configured to pierce the sealed one side of the first surface of the secondary battery to form an opening hole; and a gas discharge unit including a gas discharge body configured to be disposed on a second surface of the secondary battery to seal one side of the second surface of the secondary battery, and a gas discharge member configured to discharge the gas within the secondary battery to the outside through the opening hole, wherein the piercing member is configured to form the opening hole passing from the one side of the first surface to the one side of the second surface of the secondary battery.

Abstract: The present invention relates to a secondary battery. The secondary battery comprises: an electrode assembly having a through-hole; and a battery case accommodating the electrode assembly and having a through-type opening into which the through-hole is inserted, wherein the battery case comprises: a lower case comprising an accommodation part accommodating the electrode assembly and a lower inner sealing part having the through-type opening into which the through-hole is inserted; and an upper case comprising a cover part coupled to an upper portion of the lower case to finish the accommodation part and an upper inner sealing part having a coupling hole to which a front end of the lower inner sealing part is coupled.

Abstract: A charging and discharging apparatus for performing an activation process of a secondary battery including a plurality of compression plates spaced apart from each other by a predetermined distance to form a cell insert space into which a secondary battery cell is inserted, the plurality of compression plates moving to reduce the separated distance to press a body of the secondary battery cell; a slip sheet having a sheet shape and formed to include attachment portions attached to top ends of the compression plates and a folding portion formed by folding a region between the attachment portions to be interposed in the cell insert space; and a slip sheet fixing unit provided to be attached to and detached from the top end of the compression plate in a fitting and releasing manner in a state where the attachment portions of the slip sheet are interposed therein is provided.

Abstract: A horn includes a plurality of protrusion formation parts, each of which has a plurality of protrusions that protrude from a welding surface and are arranged in a line in at least one row, the plurality of protrusion formation parts respectively configured to form pattern formation parts on an outermost electrode tab of electrode tabs of a secondary battery, and a protrusion-free part which is disposed between two protrusion formation parts of the plurality of protrusion formation parts and in which protrusions are not provided to expose the welding surface to an outside, the protrusion-free part configured to form a pattern-free part on the outermost electrode tab. The protrusion-free part has a width greater than a width of each of the protrusions.

Abstract: The secondary battery according to the present invention may comprise the separator pocket part having the accommodation groove in which the first electrode plate is accommodated and a radical unit provided as the second electrode plate disposed on one surface of the separator pocket part to secure the stacking property, safety, and insulation.

Abstract: The secondary battery according to the present invention may comprise the separator pocket part having the accommodation groove in which the first electrode plate is accommodated and a radical unit provided as the second electrode plate disposed on one surface of the separator pocket part to secure the stacking property, safety, and insulation.

Abstract: A charge/discharge device for an activation process of a secondary battery including an accommodation structure having a plurality of accommodation spaces and provided with a wiring duct at one side of each of the accommodation spaces, each of a plurality of charge/discharge boxes installed in each of the plurality of accommodation spaces, wires wired in a space inside the wiring duct, and an exhaust fan installed on an inner wall of the wiring duct, in which the exhaust fan is installed on the inner wall of the wiring duct adjacent to one side of the accommodation space, and the wires are wired to pass an external side of the exhaust fan is provided. A heat insulation panel may be additionally installed together with the exhaust fan in the wiring duct.