Abstract: An electrode coating die includes a slurry discharge part configured to discharge an active material slurry onto a current collector; and a dam liquid discharge part provided on at least one side of the slurry discharge part and configured to discharge a dam liquid to form a dam layer covering at least a portion of an inclined surface portion provided at an edge portion of an active material slurry layer coated with an active material slurry discharged from the slurry discharge part, and an electrode coating apparatus including the same. Further, the present invention provides a method of manufacturing an electrode, the method including: a preparing operation of preparing an active material slurry including an active material, a conductive material, and a solvent; and a coating operation of applying the active material slurry on a current collector.

Abstract: An electrode assembly includes a first electrode, a second electrode, and a separator interposed therebetween. The first electrode, the second electrode and separator are wound in a winding direction about a winding axis to define a core and an outer circumference of the electrode assembly. The first electrode includes an active material portion coated with an active material layer and a first non-coated portion not coated with the active material layer along the winding direction. The first non-coated portion includes a plurality of impregnation slits extending along a circumferential direction of the electrode assembly. Longitudinal extension lines of impregnation slits adjacent to each other along the circumferential direction do not overlap each other.

Abstract: Discussed is an electrode assembly having a positive electrode, a negative electrode, and a separator wound around a winding axis, wherein the positive electrode or the negative electrode includes a current collector that has sheet-shape and having a long side and a short side and has an uncoated portion at an end of the long side, wherein the uncoated portion includes an electrode tab defined section used as an electrode tab by itself and at least one electrode tab undefined section not used as an electrode tab, wherein a maximum current path includes a widthwise direction current path along the short side of the current collector and a lengthwise direction current path along the long side of the current collector, and a current path ratio L2/L1 is approximately 11 or less when lengths of the lengthwise direction current path and the widthwise direction current path are L1 and L2, respectively.

Abstract: Disclosed is an electrode assembly, a battery, and a battery pack and a vehicle including the same. In the electrode assembly, a first electrode, a second electrode, and a separator interposed therebetween are wound based on a winding axis to define a core and an outer circumference. The first electrode includes a first active material portion coated with an active material layer and a first uncoated portion not coated with an active material layer along a winding direction. At least a part of the first uncoated portion is defined as an electrode tab by itself. The first uncoated portion includes a first portion adjacent to the core of the electrode assembly, a second portion adjacent to the outer circumference of the electrode assembly, and a third portion interposed between the first portion and the second portion. The first portion or the second portion has a smaller height than the third portion in the winding axis direction.

Abstract: Disclosed is an electrode assembly, a battery, and a battery pack and a vehicle including the same. In the electrode assembly, a first electrode, a second electrode, and a separator interposed therebetween are wound based on an axis to define a core and an outer circumference. The first electrode includes an uncoated portion at a long side end thereof and exposed out of the separator along a winding axis direction of the electrode assembly. A part of the uncoated portion is bent in a radial direction of the electrode assembly to form a bending surface region that includes overlapping layers of the uncoated portion, and in a partial region of the bending surface region, the number of stacked layers of the uncoated portion is 10 or more in the winding axis direction of the electrode assembly.

Abstract: A secondary battery may include: an electrode assembly in which first and second electrode sheets are stacked and wound with a separation sheet interposed therebetween, wherein a first electrode tab protrudes in the first electrode sheet, and a second electrode tab protrudes in the second electrode sheet; a battery can to accommodate the electrode assembly therein; and a connection part above or below the electrode assembly and facing the electrode assembly, wherein the connection part has a first area made of an electrically conductive gel material; and a second area attached to the first area and made of an electrically insulating material, wherein the second area forms at least a portion of a top surface of the connection part, and at least a portion of the first electrode tab or the second electrode tab is inserted into the first area of the connection part.

Abstract: The present invention relates to a vibration test jig for a cylindrical battery cell, including: a main body for accommodating a cylindrical battery cell; and a connection unit electrically connected to an electrode terminal of the cylindrical battery cell, wherein the connection unit includes: a connection member electrically connected to the electrode terminal and withdrawn to the outside of the main body; a support member for supporting the connection member; and a fixing member for fixing the support member on the main body. The vibration test jig enables the cylindrical battery cell mounted in the jig to be electrically connected to an external voltage and resistance measuring device through the connection unit. During a vibration test, an electrical state of the battery cell can be monitored in real time, and it can be checked whether and when an electrode tab is disconnected by using the measured voltage or resistance value.

Abstract: An electrode assembly, a battery, a battery pack and a vehicle including the same are provided. In the electrode assembly, the uncoated portion of an electrode includes a segment region divided into a plurality of segments, and the segment region includes a plurality of segment groups separated by a group separation pitch along a winding direction. One end of the electrode assembly includes a plurality of segment alignments. In winding turns corresponding to the plurality of segment alignments, group separation pitches of segment groups disposed in a same winding turn are substantially identical, and separation pitches of the segment groups is greater in a winding turn of a region adjacent to the outer circumference of the electrode assembly than in a winding turn of a region adjacent to the core of the electrode assembly.

Abstract: An electrode assembly includes an anode; a cathode; and a separator between the anode and the cathode rolled together. The anode includes an anode current collector and an anode active material portion applied onto the anode current collector, and the cathode includes a cathode current collector and a cathode active material portion applied onto the cathode current collector. An anode uncoated portion of the anode current collector at which the anode active material is not applied extends in a first direction, and a cathode uncoated portion of the cathode current collector at which the cathode active material is not applied extends in an opposite direction. The cathode active material portion includes a loading reduction portion in which a loading amount of the cathode active material is smaller than that of an adjacent region. The loading reduction portion is at one end part of the cathode in the first direction.

Abstract: A battery cell activation tray includes a tray main body including a plurality of accommodation grooves configured to receive a plurality of battery cells therein, the tray main body having an upper portion that is open, a lower plate located under the tray main body, the lower plate having a main flow path to allow a fluid to move therethrough, and a temperature controller fluidly connected to the main flow path to control a temperature of the fluid introduced into the main flow path. The fluid is introduced into the main flow path in the lower plate to control a temperature of the plurality of battery cells accommodated in the accommodation grooves of the tray main body.

Abstract: A winding device for manufacturing an electrode assembly is provided. The winding device includes a main body portion; a winding core for winding an electrode and a separation film; and a foreign particle remover connected to the main body portion and removing foreign particles, wherein the foreign particle remover is formed to surround the winding core while separated from the winding core.

Abstract: A secondary battery may include: an electrode assembly in which first and second electrode sheets are stacked and wound with a separation sheet interposed therebetween, wherein a first electrode tab protrudes in the first electrode sheet, and a second electrode tab protrudes in the second electrode sheet; a battery can to accommodate the electrode assembly therein; and a connection part above or below the electrode assembly and facing the electrode assembly, wherein the connection part has a first area made of an electrically conductive gel material; and a second area attached to the first area and made of an electrically insulating material, wherein the second area forms at least a portion of a top surface of the connection part, and at least a portion of the first electrode tab or the second electrode tab is inserted into the first area of the connection part.

Abstract: Discussed is a battery that may include an electrode assembly including a first electrode, a second electrode and a separator wound around a winding axis, wherein the first electrode includes a first active material region coated with a first active material layer and a first uncoated region not coated with the first active material layer, and at least a part of the first uncoated region being an electrode tab; a first current collector coupled to at least a part of the first uncoated region on the electrode assembly; a battery housing to accommodate the electrode assembly and the first current collector; and an insulator interposed between at least one of the first uncoated region and the first current collector and an inner surface of the battery housing facing the at least one of the first uncoated region and the first current collector to block an electrical connection between the battery housing and the at least one of the first uncoated region and the first current collector.

Abstract: A battery cell fixing device includes a plurality of holders configured to be coupled to a cylindrical battery cell along an outer circumference of the cylindrical battery cell, and each of the plurality of holders includes a holder body configured to cover a part of the outer circumference of the cylindrical battery cell; and a beading fixer configured to protrude toward the cylindrical battery cell from the holder body and to be inserted into a beading portion that is formed in the outer circumference of the cylindrical battery cell.

Abstract: An electrode assembly includes a first electrode, a separation membrane, and a second electrode are stacked and wound, in which at least one of the first electrode and the second electrode includes a current collector and an electrode active material layer provided on the current collector, and the first electrode includes a fixing part which is provided on the electrode active material layer, provided to an edge portion closest to a winding center of the electrode assembly, and is fixed to the separation membrane. Further, a battery cell includes the electrode assembly; a battery can which accommodates the electrode assembly and has an opening at one side; an electrode terminal riveted through a through-hole formed in a bottom of the battery can; a gasket provided between the electrode terminal and an outer diameter of the through-hole; and a sealing body sealing the opening of the battery can.

Abstract: A method for manufacturing a secondary battery is provided, the method including a first step of providing a top cap and a safety vent, a second step of bending an end portion of the safety vent upward, and a third step of inserting the top cap inside the safety vent. An outer diameter A of the top cap is greater than an inner diameter B of the safety vent between the second step and the third step. A secondary battery is also provided.

Abstract: A battery includes an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and second electrode, a first portion including an active material extending between a pair of first sides, and a second portion extending between the pair of first sides and exposed beyond the separator, at least a part of the second portion includes an electrode tab; a battery housing having a first end with a first opening, a second end opposite the first end, and an inner surface, the battery housing accommodating the electrode assembly; a first current collector including a tab coupling portion coupled to the second portion of the first electrode and a housing coupling portion extending from the tab coupling portion and electrically coupled to the inner surface of the battery housing; and a cap covering the first opening of the battery housing.

Abstract: A secondary battery includes an electrode assembly in which electrodes and separators are alternately stacked to be wound, a can configured to accommodate the electrode assembly therein, having an opening in an upper end thereof, and provided with a beading part that is bent inward to form a recessed groove, a cap assembly seated on the beading part to cover the opening of the can, an extinguishing agent accommodated in the recessed groove to extinguish ignition when the secondary battery is ignited, and a sealing part configured to seal the recessed groove.

Abstract: A jelly-roll type of electrode assembly in which a negative electrode sheet, a positive electrode sheet, and a separation membrane interposed between the negative electrode sheet and the positive electrode sheet are wound together is provided. The electrode assembly also includes: at least one electrode tab attached to the negative electrode sheet or the positive electrode sheet and at least a portion extending outside; and a heat radiation tape adhered to the electrode. The electrode tab to which the heat radiation tape is adhered is positioned between the center part of the wound electrode assembly and an external circumferential surface, or on the external circumferential surface, the heat radiation tape includes a heat diffusion layer, and the heat diffusion layer includes at least one of graphite and a metal foil.

Abstract: A battery includes an electrode assembly including a first electrode, second electrode, and a separator between the first electrode and the second electrode, the first electrode including a first region coated with an active material and a second region at a first side and adjacent to the first region, the second region being exposed beyond the separator, and at least part of the second region is an electrode tab; a housing including a first end with a first opening, the housing accommodating the electrode assembly; a first current collector including an edge portion on the electrode assembly, a second region coupling portion extending from the edge portion and coupled with the second region, and a terminal coupling portion spaced apart from the second region coupling portion; and a terminal coupled with the terminal coupling portion.