Abstract: A pouch-shaped secondary battery includes a case configured to have a laminate sheet structure, an electrode assembly received in the case, an electrode tab extending from the electrode assembly, an electrode lead having one side connected to the electrode tab and the other side protruding out of the case, and a protective film located on an upper surface and a lower surface of a weld of the electrode tab and the electrode lead. The protective film includes an ethylene-vinyl acetate copolymer (EVA)-based adhesive layer disposed in tight contact with the surface of the weld and a support layer located on one surface of the adhesive layer, the support layer being made of at least one of polypropylene (PP), cast polypropylene (CPP), or polyethylene terephthalate (PET). A method of manufacturing the pouch-shaped secondary battery is also provided.

Abstract: The present application provides a roll-type electrode body, a method for manufacturing same, and a process using the roll-type electrode body (a method for manufacturing a secondary battery). According to the present application, it is possible to provide a roll-type electrode body that can reduce loss generated in the conventional manufacturing process thereof and contribute to yield and productivity improvement, a method for manufacturing same, and a method for manufacturing a secondary battery by using same.

Abstract: An air lift device and a drying device for manufacturing an electrode, where the air lift device related to one comprises a main body, including a space part into which air is introduced, a spray part through which the air in the space part is sprayed to the outside toward a coated electrode, a membrane member which is disposed in the main body to face the space part and is extensible, and a press part differently setting a spray pressure of the air sprayed toward a coated portion and a spray pressure of the air sprayed toward an uncoated portion by pressurizing a partial region of the membrane member.

Abstract: A degassing system for a secondary battery, which includes a degassing device configured to discharge a gas generated in a pouch. The degassing device includes: first and second gas discharge members disposed respectively corresponding to one surface portion and the other surface portion of the pouch to press the one surface portion and the other surface portion of the pouch so as to discharge the gas generated in the pouch through the one surface portion and the other surface portion; and a moving member configured to linearly move the second gas discharge member toward the first gas discharge member so that the first and second gas discharge members press the one surface portion and the other surface portion, and thus, the gas generated in the pouch may be effectively discharged.

Abstract: Provided is an electrode assembly manufacturing process comprising the following steps. First, wrapping a second separator around a laminate structure having alternating layers of positive electrodes, first separators, and negative electrodes. Second, simultaneously pressing the upper end and the lower end of the laminate structure including the second separator-3-2 to strengthen the adhesive strength between each layer of the laminate structure. Third, bonding the excess portions of the second separator-3-2 surrounding the structure, thereby adjusting to meet the standard requirements of the laminate structure. And fourth, bonding each of the bonded portions of the second separator to a respective adjacent portion of the second separator in the lateral dimension. The electrode assembly manufacturing process minimizes damage to the initial structure and allows the wrapping to suit the size of the structure, thereby increasing the utilization value of the electrode assembly.

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: 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 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.