Abstract: A secondary battery configured to have a structure in which an electrode assembly is received in a battery case together with an electrolytic material, wherein the battery case is provided therein with a space for receiving the electrode assembly and wherein the battery case is made of a thermoplastic resin, which can be injection-molded. An injection mold may be formed such that the size of the mold corresponds to the thickness of the electrode, thereby solving a problem in which the formability of a conventional laminate sheet including a metal layer is low. In addition, a process of forming the laminate sheet and a process of sealing the battery case using a pressing member, which are essentially required in order to use the laminate sheet, may be omitted, whereby a manufacturing process is simplified and thus productivity is improved.

Abstract: A pouch type secondary battery according to the present invention includes: an electrode assembly; a battery case accommodating the electrode assembly in an inside thereof; an electrode tab protruding from the electrode assembly; a first electrode lead having an inner end connected to the electrode tab; a second electrode lead having an inner end coupled to an outer end of the first electrode lead and an outer end extending outside of the battery case; a connection part coupling the first and second electrode leads to each other; an insulation part fused around a portion of each of the first and second electrode leads, the insulation part bonding the first and second electrode leads to the battery case; and a fusion prevention part located at a position at one surface of the first electrode lead, the fusion prevention part preventing the first electrode lead from being fused to the insulation part.

Abstract: A secondary battery is disclosed. According to the present invention, when an internal pressure exceeding a certain level occurs, current may be interrupted to stop an operation of the secondary battery, thereby preventing the secondary battery from being ignited or exploded by the increase in internal pressure of the secondary battery and improving safety of the secondary battery.

Abstract: A secondary battery is disclosed. According to the present invention, when an internal pressure exceeding a certain level occurs, current may be interrupted to stop an operation of the secondary battery, thereby preventing the secondary battery from being ignited or exploded by the increase in internal pressure of the secondary battery and improving safety of the secondary battery.

Abstract: Provided are a copper foil for a secondary battery, which has excellent oxidation resistance without having to use chromium and has excellent adhesion to an active material layer after being processed to an electrode current collector, a method of manufacturing the copper foil, and a secondary battery including the copper foil. In the copper foil for a secondary battery, a styrene butadiene rubber (SBR) layer is formed on a surface of an electro-deposited copper foil.

Abstract: A method for a pouch film according to an embodiment of the present invention includes: a step of applying an adhesive on one surface of a first polymer layer; a step of depositing metal particles on the adhesive; a step of applying heat and a pressure to the deposited metal particles to sinter the metal particles and thereby forming a gas barrier layer; and a step of laminating a second polymer layer on one surface of the gas barrier layer.

Abstract: Disclosed herein is a pouch-shaped battery case, including an electrode assembly, an outer coating layer, a metal barrier layer, and an inner adhesive layer sequentially stacked with one another, a first adhesive layer interposed between the outer coating layer and the metal barrier layer, a second adhesive layer interposed between the metal barrier layer and the inner adhesive layer, an upper case and a lower case sealed to one another by thermal fusion at outer edges thereof, such that the electrode assembly is mounted between the upper case and the lower case, and a gas discharge member providing gas communication between an inside and an outside of the pouch-shaped battery case, the gas discharge member being disposed within a fused portion of the pouch-shaped battery case that is formed by the inner adhesive layer of the upper case and the lower case being thermally fused to one another.

Abstract: Disclosed herein is a pouch-shaped secondary battery including a laminate sheet including an outer coating layer, a metal layer, and an inner adhesive layer, an electrode assembly, an electrolytic solution, and a heat transfer member connecting the electrode assembly to the metal layer of the laminate sheet, wherein the laminate sheet extends around the electrode assembly, the electrolytic solution, and the heat transfer member.

Abstract: The present disclosure relates to a method for sealing a pouch casing of a pouch-type secondary battery, which includes the steps of: a receiving step in which an electrode assembly is received in an inner space formed between an upper pouch and a lower pouch; and a sealing step in which a first pressure is applied to an outer circumferential sealing portion, where the upper pouch and the lower pouch are sealed, in the longitudinal direction, and then the pressure is relieved, wherein the sealing step is carried out by applying external force to the upper pouch in the upward direction and to the lower pouch in the downward direction, or by applying a second pressure working in perpendicular to the first pressure to the sealing portion from the inner part of the pouch casing in a direction toward the outside.

Abstract: The present invention relates to a pouch case for a secondary battery and a pouch-type secondary battery comprising the same. More particularly, it relates to a pouch case for a secondary battery comprising an inner resin layer, a metal layer and an outer resin layer, wherein the inner resin layer comprises a porous non-woven fabric support having a plurality of pores and a polymer sealant filled in the pores of the non-woven fabric support; and a secondary battery comprising the same.

Abstract: A secondary battery includes a pouch case provided with an accommodation part accommodating an electrode assembly and a gas pocket part collecting a gas generated in the accommodation part by the electrode assembly, and a clamp device coupled between the accommodation part and the gas pocket part to seal a gap between the accommodation part and the gas pocket part.

Abstract: The present disclosure relates to a secondary battery pouch with an enhanced insulation property, and a method for manufacturing the same, and more specifically, to a secondary battery pouch for preventing occurrence of cracks in a sealing portion of a periphery of a pouch in a completed pouch-type secondary battery, particularly at a folded portion of the sealing portion, and a method for manufacturing the same.

Abstract: A secondary battery includes a pouch case provided with an accommodation part accommodating an electrode assembly and a gas pocket part collecting a gas generated in the accommodation part by the electrode assembly, and a clamp device coupled between the accommodation part and the gas pocket part to seal a gap between the accommodation part and the gas pocket part.

Abstract: Disclosed herein is a battery cell configured to have a structure in which an electrode assembly is received in a battery case together with an electrolytic solution in the state in which the battery case is sealed and in which a first electrode terminal and a second electrode terminal are located outside the battery case, wherein the electrode assembly is configured to have a structure in which a plurality of first electrode plates and a plurality of second electrode plates are stacked in the state in which separators are interposed respectively between the first electrode plates and the second electrode plates, at least one of the first and second electrode plates includes at least two unit tabs protruding outward from a main body thereof, and unit leads are coupled to the unit tabs in order to form at least one terminal unit.

Abstract: The present disclosure improves a quality of the secondary battery by minimizing a size of the adhesion layer between the electrode and the separator to improve the transfer of lithium ions of which movement was obstructed by the adhesion layer.

Abstract: Disclosed are a secondary battery and a method for manufacturing the same. According to the present invention, since an external protrusion protruding from the outside of an exterior constituting a body of the secondary battery as a component through which a secondary battery according to a related art is electrically connected to external electric equipment is removed, the secondary battery may be reduced in volume under the same capacity.

Abstract: A pouch case of the present disclosure includes an inner layer, a metallic layer, and an outer layer, wherein the inner layer includes a foaming activator containing an isocyanate-based compound which generates a gas by a foaming agent. Accordingly, since the pouch case includes the inner layer including the foaming activator, when moisture or the like is permeated thereto due to an external factor, a protective gas layer is formed between the inner layer and an electrode assembly in a short time, so that the pouch case and the electrode assembly may be protected, moisture which is permeable into the electrode assembly may be blocked, and separator cracking also may be prevented. Accordingly, explosion which may be caused by moisture permeation, separator cracking, or a short circuit by contact between the pouch case and the electrode assembly, or the like, may be prevented.

Abstract: The present disclosure provides a porous separator substrate with an inverse opal structure obtained by using an engineering plastic resin with high heat-resistance, and a manufacturing method thereof. In the method, a non-crosslinked polymer resin is used to form an opal structure and a crosslinked polymer resin is penetrated into the opal structure and an organic solvent is used to remove the polymer particles being used to form the opal structure, thereby manufacturing a porous substrate with an inverse opal structure. According to the present disclosure, a separator having good porosity and air permeability can be provided without the problems of heat-resistance decrease, pore closing and thickness decrease.

Abstract: A pouch case of the present disclosure includes an inner resin layer, a metallic layer, and an outer resin layer, wherein the resin layer(s) include(s) a foaming activator containing an isocyanate-based compound and a polyol compound. Accordingly, since the pouch case includes the inner resin layer and/or the outer resin layer including the foaming activator, when moisture or the like is permeated thereto due to an external factor, a protective layer including urethane-based foam is formed in the outer resin layer or between the inner resin layer and an electrode assembly in a short time, so that the pouch case and the electrode assembly may be protected, moisture which is permeable into the electrode assembly may be blocked, and separator cracking also may be prevented.

Abstract: The present disclosure relates to a pouch case for a secondary battery, and a secondary battery comprising the same, and in particular, to a pouch case for a secondary battery fabricated by laminating an inner resin layer, a middle resin layer and an outer resin layer, wherein the inner resin layer comprises a polyolefin-based resin and a thermosetting moisture absorber, and a secondary battery comprising the same.