Abstract: An electrode assembly and a secondary battery are provided. In an exemplary embodiment, an electrode assembly includes: a first electrode plate having a first electrode tab attached thereto; a second electrode plate having at least one second electrode tab attached thereto; and a separator between the first electrode plate and the second electrode plate, the electrode assembly wound in a state in which the first electrode plate, the separator, and the second electrode plate are stacked, and the first electrode plate includes coating portions formed by coating an active material on first and second surfaces thereof, and a half-coating portion formed by coating the active material on only one of the first and second surfaces at a region corresponding to a leading edge, on the basis of a winding direction, where an active material of the second electrode plate begins.

Abstract: The present invention relates to an electrode assembly and a secondary battery comprising same, wherein by adjusting at least one of a loading level of a positive electrode coating layer and a loading level of a negative electrode coating layer, the negative electrode coating layer can be prevented from unnecessarily increasing in capacity, and a minimum capacity ratio of a positive electrode versus a negative electrode can be maintained in order to minimize lithium precipitation according to the number of winding turns of an electrode assembly.

Abstract: Disclosed is a secondary battery, which has a reinforced strength and can simplify the manufacturing process thereof. For example, one embodiment provides a secondary battery which comprises: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.

Abstract: The present invention relates to a secondary battery in which an electrode assembly and a current collection plate may be easily welded and safety may be improved. As an embodiment, disclosed is a secondary battery comprising: an electrode assembly which is formed by winding a first electrode plate having a first electrode uncoated part, a separator, and a second electrode plate having a second electrode uncoated part, the first electrode uncoated part protruding upwards, and the second electrode uncoated part protruding downwards; and a first current collection plate which is electrically connected to the first electrode uncoated part and has a concave-convex part protruding downwards, wherein the width of the concave-convex part becomes wider from the center of the first current collection plate toward the outer periphery thereof.

Abstract: An electrode assembly of a secondary battery has positive and negative electrode tabs aligned on a same line approximately at the center of the radius of the cross section of the electrode assembly, and are attached so as not to overlap each other in the longitudinal direction, thereby making it possible to improve winding roundness, and a positive electrode plate coating portion on a positive electrode plate, which is adjacent to the negative electrode tab, and which has no positive electrode tab formed thereon, thereby preventing precipitation of lithium during overcharging. The electrode assembly includes positive and negative electrode plates attached to the positive and negative electrodes tabs, respectively, and a separator interposed between the electrode plates, wherein the electrode plates and the separator are laminated and wound such that the positive and negative electrode tabs respectively protrude from the longitudinal upper and lower portions of the electrode assembly, respectively.

Abstract: An electrode assembly includes a first electrode plate coated with a first electrode active material and having a first non-coated part along an upper end thereof, a second electrode plate coated with a second electrode active material and having a second non-coated part, and a separator between the first electrode plate and the second electrode plate, wherein the electrode assembly is wound in a jelly roll shape, wherein the first non-coated part has a structure in which isosceles trapezoidal electrode tabs are adjacent to one another with respective notches therebetween formed at an angle and at intervals from a start point thereof that is closest to a winding axis, such that the electrode tabs are bent toward the winding axis, and wherein respective lengths of the isosceles trapezoidal electrode tabs increase as the electrode tabs get farther away from the winding axis when the electrode assembly is wound.

Abstract: An embodiment of the present invention relates to a secondary battery, and with respect to a technical problem to be resolved, provided is a secondary battery which has an electrode tab provided by forming a notch on a non-coated part of an electrode plate of an electrode assembly, and which can enable a current collecting plate to come into surface contact with the electrode tab.

Abstract: The present invention provides an electrode assembly, which can reduce resistance and improve a process property, a secondary battery including same, and a method for manufacturing same. For example, disclosed is an electrode assembly comprising: a first electrode plate having a first electrode tab attached thereto: a plurality of second electrode plates having second electrode tabs attached thereto, respectively, and a separator interposed between the first electrode plate and the plurality of second electrode plates, wherein the first electrode plate, the separator, and the plurality of second electrode plates are wound in a state of being stacked on one another, and the second electrode tabs are formed to be symmetrical to each other on the basis of a winding center thereof.

Abstract: A technical object to be solved according to the present disclosure is to provide a secondary battery which has reduced electrical resistance by directly connecting an electrode assembly to a can and/or a terminal without lead tabs and also has an increased battery capacity by removing lead tabs. To this end, the present disclosure provides a secondary battery comprising: a can; an electrode assembly accommodated in the can and including a first uncoated portion extending in a first direction and a second uncoated portion extending in a second direction opposite to the first direction; a first current collector plate electrically connected to the first uncoated portion of the electrode assembly; a first terminal portion coupled to the can and electrically connected to the first current collector plate; and a second terminal portion coupled to the can and electrically connected to the second uncoated portion of the electrode assembly.

Abstract: The present invention relates to a secondary battery supporting the center part of an electrode assembly to enhance stability and reliability. For example, disclosed is a secondary battery comprising: an electrode assembly formed by winding a first electrode plate, a separator and a second electrode plate; a case for accommodating the electrode assembly; a current collection plate electrically connected to the first electrode plate and coupled to the upper part of the electrode assembly; and a core insulation member coupled to a winding center of the electrode assembly at the upper part of the current collection plate, wherein the core insulation member includes an insertion part having an inner hole, and a flange part extending in the horizontal direction from the upper end of the insertion part.

Abstract: The present invention relates to an electrode assembly and a secondary battery including same. A jelly-roll-type electrode assembly comprises a positive electrode non-coated portion formed on a positive electrode plate, and a negative electrode non-coated portion formed on a negative electrode plate. The negative electrode non-coated portion includes a first negative electrode non-coated portion formed between the front end and the rear end of the negative electrode plate in the winding direction, and a second negative electrode non-coated portion formed at the rear end of the negative electrode plate. A negative electrode tab is disposed in the first negative electrode non-coated portion.

Abstract: The present invention relates to an electrode assembly and a secondary battery comprising same, wherein by adjusting at least one of a loading level of a positive electrode coating layer and a loading level of a negative electrode coating layer, the negative electrode coating layer can be prevented from unnecessarily increasing in capacity, and a minimum capacity ratio of a positive electrode versus a negative electrode can be maintained in order to minimize lithium precipitation according to the number of winding turns of an electrode assembly.

Abstract: An electrode assembly and a secondary battery are provided. In an exemplary embodiment, an electrode assembly includes: a first electrode plate having a first electrode tab attached thereto; a second electrode plate having at least one second electrode tab attached thereto; and a separator between the first electrode plate and the second electrode plate, the electrode assembly wound in a state in which the first electrode plate, the separator, and the second electrode plate are stacked, and the first electrode plate includes coating portions formed by coating an active material on first and second surfaces thereof, and a half-coating portion formed by coating the active material on only one of the first and second surfaces at a region corresponding to a leading edge, on the basis of a winding direction, where an active material of the second electrode plate begins.

Abstract: An electrode assembly and a secondary battery are provided. In an exemplary embodiment, an electrode assembly includes: a first electrode plate having a first electrode tab attached thereto; a second electrode plate having at least one second electrode tab attached thereto; and a separator between the first electrode plate and the second electrode plate, the electrode assembly wound in a state in which the first electrode plate, the separator, and the second electrode plate are stacked, and the first electrode plate includes coating portions formed by coating an active material on first and second surfaces thereof, and a half-coating portion formed by coating the active material on only one of the first and second surfaces at a region corresponding to a leading edge, on the basis of a winding direction, where an active material of the second electrode plate begins.

Abstract: An embodiment of the present invention relates to a secondary battery and addresses the technical problem of providing a secondary battery capable of improving structural stability.

Abstract: The present invention relates to a secondary battery in which an electrode assembly and a current collection plate may be easily welded and safety may be improved. As an embodiment, disclosed is a secondary battery comprising: an electrode assembly which is formed by winding a first electrode plate having a first electrode uncoated part, a separator, and a second electrode plate having a second electrode uncoated part, the first electrode uncoated part protruding upwards, and the second electrode uncoated part protruding downwards; and a first current collection plate which is electrically connected to the first electrode uncoated part and has a concave-convex part protruding downwards, wherein the width of the concave-convex part becomes wider from the center of the first current collection plate toward the outer periphery thereof.

Abstract: An embodiment of the present invention relates to a secondary battery, and with respect to a technical problem to be resolved, provided is a secondary battery which has an electrode tab provided by forming a notch on a non-coated part of an electrode plate of an electrode assembly, and which can enable a current collecting plate to come into surface contact with the electrode tab.

Abstract: The present invention provides an electrode assembly, which can reduce resistance and improve a process property, a secondary battery including same, and a method for manufacturing same. For example, disclosed is an electrode assembly comprising: a first electrode plate having a first electrode tab attached thereto: a plurality of second electrode plates having second electrode tabs attached thereto, respectively, and a separator interposed between the first electrode plate and the plurality of second electrode plates, wherein the first electrode plate, the separator, and the plurality of second electrode plates are wound in a state of being stacked on one another, and the second electrode tabs are formed to be symmetrical to each other on the basis of a winding center thereof.

Abstract: An electrode assembly of a secondary battery has positive and negative electrode tabs aligned on a same line approximately at the center of the radius of the cross section of the electrode assembly, and are attached so as not to overlap each other in the longitudinal direction, thereby making it possible to improve winding roundness, and a positive electrode plate coating portion on a positive electrode plate, which is adjacent to the negative electrode tab, and which has no positive electrode tab formed thereon, thereby preventing precipitation of lithium during overcharging. The electrode assembly includes positive and negative electrode plates attached to the positive and negative electrodes tabs, respectively, and a separator interposed between the electrode plates, wherein the electrode plates and the separator are laminated and wound such that the positive and negative electrode tabs respectively protrude from the longitudinal upper and lower portions of the electrode assembly, respectively.

Abstract: The present invention relates to an electrode assembly and a secondary battery comprising same. Since an anode tab and a cathode tab are welded to a plurality of anode uncoated portions and a plurality of cathode uncoated portions of the electrode assembly to serve as a current collector plate, the present invention can prevent a roundness decrease, deformation, etc., which can be caused by expansion of a silicon-based anode active material that is applied for high capacitance, and at the same time, promotes high power output and low resistance.