Abstract: A pouch type secondary battery and a method of manufacturing the same are disclosed. The pouch type secondary battery includes a pouch type case formed by attaching an upper sheet and a lower sheet, and an electrode assembly received in the pouch type case. A polymer coating layer for improving sealability is further included at an outer side portion of the pouch type case, in which the upper sheet and the lower sheet are attached.

Abstract: An impeller mixer of electrode slurry includes a container (100) filled with raw materials of electrode slurry, impellers (110) have different shapes from each other and are multi-layered, the impellers being rotatably provided in the container (100) and configured to mix the raw materials of electrode slurry, and a driving part (120) disposed on a bottom portion of the container (100) and coupled to the impellers (110) through a coupling shaft to rotate the impeller, wherein the coupling shaft is disposed above the driving part. Therefore, multi-layered impellers (11) rotating at a high speed efficiently disperse raw materials of electrode slurry in a short time and also allow the raw materials to be uniformly mixed, resulting in an increase in work efficiency.

Abstract: A pouch type secondary battery and a method of manufacturing the same are disclosed. The pouch type secondary battery includes a pouch type case formed by attaching an upper sheet and a lower sheet, and an electrode assembly received in the pouch type case. A polymer coating layer for improving sealability is further included at an outer side portion of the pouch type case, in which the upper sheet and the lower sheet are attached.

Abstract: An electrode assembly according to the present disclosure includes an electrode stack part formed by stacking at least one radical unit having a four-layered structure of a first electrode, a separator, a second electrode and a separator, and an electrode fixing part for wrapping and fixing the electrode stack part. The electrode assembly according to the present disclosure may be fabricated by means of a stacking process other than a folding process, and may accomplish accurate alignment and stable fixing.

Abstract: An electrode assembly according to the present disclosure includes an electrode stack part formed by stacking at least one radical unit having a four-layered structure of a first electrode, a separator, a second electrode and a separator, and an electrode fixing part for wrapping and fixing the electrode stack part. The electrode assembly according to the present disclosure may be fabricated by means of a stacking process other than a folding process, and may accomplish accurate alignment and stable fixing.

Abstract: Provided are a pouch case of a battery and a secondary battery including the same. Specifically, the present invention relates to a pouch case of a battery, which is formed by stacking an internal resin layer, an intermediate resin layer, and an external resin layer, and a pouch-type secondary battery including the same.

Abstract: Disclosed herein is a detector that detects precision in charging current of a battery cell charging and discharging device, the detector including an instrument unit and a power supply unit, wherein the instrument unit includes a housing formed in a box shape open at a top thereof and a plurality of voltage measurement parts including a pair of connection terminals mounted at opposite sides of the housing inside the housing to detect precision in current of the charging and discharging device, the connection terminals being electrically connected to the power supply unit, and shunt resistance parts to apply uniform resistance to the respective connection terminals, and the power supply unit includes a charging and discharging device to supply current to the voltage measurement parts and to charge and discharge a battery cell and a multi-meter to measure current and voltage of the shunt resistance parts.

Abstract: A fabricating method of a unit structure for accomplishing an electrode assembly formed by a stacking method, and an electrochemical cell including the same are disclosed. The fabricating method of the electrode assembly is characterized with fabricating the unit structure by conducting a first process of laminating and forming a bicell having a first electrode/ separator/ second electrode/ separator/ first electrode structure, conducting a second process of laminating a first separator on one of the first electrode among two of the first electrodes, and conducting a third process of laminating second separator/second electrode one by one on the other first electrode among the two of the first electrodes.

Abstract: Provided is a cathode including a cathode current collector, a cathode tab protruding from the cathode current collector, and an insulation layer coated with an insulating material on the cathode tab, and a secondary battery including the cathode. Since the cathode of the present invention includes an insulation layer on a cathode tab, the present invention may prevent an internal short circuit which may occur due to cell deformation or sharp edges of electrodes, which are formed during cutting of the electrodes in a preparation process of the battery, when the electrodes are stacked, or may prevent a physical short circuit between the cathode and the anode due to shrinkage of a separator in a high-temperature atmosphere. In a case where the cathode is used in a lithium secondary battery, safety and reliability in battery performance may be significantly improved.

Abstract: Provided is a structure of a pouch which may be used in a high-capacity battery having high capacity and high stiffness, wherein the pouch may include an upper housing module which includes a metallic base plate having a concave-shaped accommodation space and polymer layers formed on one surface or both surfaces of the base plate, and a lower pouch sheet which is combined with a lower surface of the upper housing module to seal the accommodation space.

Abstract: A method for injecting an electrolyte includes heating a case in which an electrode assembly is accommodated, and injecting an electrolyte into the case after the heating of the case. Here, the heating of the case may include heating the case through high-frequency induction heating using a coil. Also, the coil may have a spiral shape to surround the outside of the case along a longitudinal direction of the case.

Abstract: The present invention relates to a secondary battery structure. The secondary battery structure includes: a can; an electrode assembly accommodated in the can, the electrode assembly including a cathode tab and an anode tab; a cap plate sealing an opened upper end of the can; and an upper insulator disposed between the can and the cap plate, the upper insulator having a cathode tab hole for the cathode tab, an anode tab hole for the anode tab, and an injection/impregnation hole for injecting and impregnating, wherein each of the cathode tab hole, the anode tab hole, and the injection/impregnation hole extends in a length or width direction of the upper insulator and is symmetrical with respect to at least one of a line (a) that equally divides the upper insulator in a width direction and a line (b) that equally divides the upper insulator in a length direction.

Abstract: Provided are a pouch for a secondary battery including a first sheet and a second sheet, and a frame unit which is sealed by the first sheet and the second sheet and includes an accommodating part for accommodating an electrode assembly including electrode tabs therein, and a secondary battery including the pouch. According to the present invention, since a structure of a pouch for a secondary battery may include a frame unit capable of accommodating a large electrode assembly, a high-capacity and large-area secondary battery having high capacity and high stiffness may be realized.

Abstract: The present invention relates to an air micrometer. The air micrometer includes a target object accommodation slot having a bottom surface and a ceiling surface to accommodate at least one portion of the target object between the bottom surface and the ceiling surface, and an air spray unit including a nozzle opened in the bottom surface or the ceiling surface to spray the air onto the target object that is accommodated between the bottom surface and the ceiling surface.

Abstract: Disclosed herein is a secondary battery configured to have a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case in a state in which the electrode assembly is impregnated with an electrolyte, wherein electrode tabs are attached to active material uncoated portions of electrode plates of the electrode assembly and an anode tab, which is one of the electrode tabs and one end of which is attached to a battery case, is made of a Cu—Ni alloy.

Abstract: Provided is a secondary battery including integrated anode and cathode leads and a method of manufacturing the same. An anode lead and a cathode lead of a secondary battery aligned to be parallel with respect to each other are encompassed by a single lead film. Thus, sealing may be easily implemented, lead film components may be managed as one component, and vibrations of an electrode lead may be prevented.

Abstract: Disclosed herein is a detector that detects precision in charging current of a battery cell charging and discharging device, the detector including an instrument unit and a power supply unit, wherein the instrument unit includes a housing formed in a box shape open at a top thereof and a plurality of voltage measurement parts including a pair of connection terminals mounted at opposite sides of the housing inside the housing to detect precision in current of the charging and discharging device, the connection terminals being electrically connected to the power supply unit, and shunt resistance parts to apply uniform resistance to the respective connection terminals, and the power supply unit includes a charging and discharging device to supply current to the voltage measurement parts and to charge and discharge a battery cell and a multi-meter to measure current and voltage of the shunt resistance parts.

Abstract: Disclosed herein is a battery cell configured such that an electrode assembly of a cathode/separator/anode stack structure is mounted in a changeable cell case in a state in which the electrode assembly is impregnated with an electrolyte, wherein the electrode assembly and the cell case are curved in the same direction on axial vertical sections thereof in a state in which opposite ends of the electrode assembly and opposite ends of the cell case are directed in the same direction about a middle part of the electrode assembly and a middle part of the cell case.

Abstract: Disclosed herein are a method for welding electrode taps of a secondary battery which improves insulation defects generated during welding between the electrode taps and lead parts and an electrode assembly manufactured thereby. The method for welding electrode taps includes performing main welding to connect electrode taps protruded from electrode plates provided in a battery and lead parts electrically connecting the electrode taps to external terminals and having a lead film on the surfaces thereof and, in main welding, a welding part is formed in a partial section of an overlapping region between the electrode tap and the lead part, and a non-welding section is formed between the welding part and the lead film.

Abstract: Disclosed is a technology for preventing electrodes in a secondary battery from being short-circuited with each other. An electrode assembly includes a cathode and anode of which a cathode collector and anode collector are coated with a cathode active material and anode active material, respectively, and a separator disposed between the cathode and the anode. An insulation layer is disposed on a tab part of the cathode collector constituting the cathode. Thus, an insulation layer may be disposed on an end (a tab part) of the cathode collector that is used as a tab of the cathode electrode in the structure of the electrode assembly to prevent the cathode from being physically short-circuited with the anode in the sequentially stacked structure of cathode/separator/anode.