Abstract: A method for manufacturing a nonaqueous electrolyte secondary battery, when an electrode tab is provided at a longitudinal-direction end portion of an electrode located at a winding-start side of an electrode body, the method being capable of sufficiently reducing damage on a separator and the electrode in a process for manufacturing the electrode body. In a manufacturing step of one example of an embodiment, a negative electrode tab is bonded to a longitudinal-direction end portion of a negative electrode to be located at a winding-start side of an electrode body, the negative electrode tab is processed so that a width-direction central portion of the negative electrode tab at least bulges toward a winding-outer side of the electrode body, and while a gap is formed between the negative electrode tab and a winding core, a positive electrode, the negative electrode, and a separator are wound around the winding core.

Abstract: A method for manufacturing a nonaqueous electrolyte secondary battery, when an electrode tab is provided at a longitudinal-direction end portion of an electrode located at a winding-start side of an electrode body, the method being capable of sufficiently reducing damage on a separator and the electrode in a process for manufacturing the electrode body. In a manufacturing step of one example of an embodiment, a negative electrode tab is bonded to a longitudinal-direction end portion of a negative electrode to be located at a winding-start side of an electrode body, the negative electrode tab is processed so that a width-direction central portion of the negative electrode tab at least bulges toward a winding-outer side of the electrode body, and while a gap is formed between the negative electrode tab and a winding core, a positive electrode, the negative electrode, and a separator are wound around the winding core.

Abstract: A battery having a positive electrode lead connected to a radial-direction intermediate position of the electrode body, and a negative electrode lead connected to a winding start end. In a region other than a first region defined by the outermost circumference of the negative electrode and two straight lines extending from a winding central axis of the electrode body through two points which are outside from two circumference-direction ends of the negative electrode lead by an angle of 10° with respect to the winding central axis and a second region defined by two straight lines in contact with two circumference-direction ends of the positive electrode lead drawn in parallel to a straight line between a circumference-direction center of the positive electrode lead and the winding central axis, the outermost circumference of the negative electrode, and the innermost circumference thereof, a winding start front end of the positive electrode is disposed.

Abstract: A nonaqueous electrolyte secondary battery including a positive electrode plate including a positive electrode current collector and a positive electrode mixture layer, formed thereon, containing a positive electrode active material; a negative electrode plate including a negative electrode current collector and a negative electrode mixture layer, formed thereon, containing a negative electrode active material; a separator: a nonaqueous electrolyte; an outer can; and a sealing body. The positive electrode and negative electrode plates are wound with the separator there between. The positive electrode active material contains a lithium-nickel composite oxide containing cobalt and aluminum as constituent elements. The negative electrode active material contains graphite and a silicon material. The negative electrode plate includes negative electrode current collector-exposed portions, located at both ends thereof in a longitudinal direction, not covered by the negative electrode mixture layer.

Abstract: A non-aqueous electrolyte secondary battery in an aspect of the present invention includes an electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; a non-aqueous electrolyte; an outer can that houses the electrode body and the non-aqueous electrolyte; and a sealing body that seals an opening of the outer can. The negative electrode plate has a negative electrode mixture layer formed on a negative electrode current collector. The negative electrode mixture layer contains a silicon material and graphite as negative electrode active materials. The negative electrode plate has, at its winding start end, a first negative electrode current collector exposed portion to which a negative electrode tab is connected. The negative electrode plate has, at its winding finish end, a second negative electrode current collector exposed portion in contact with an inner wall surface of the outer can.

Abstract: A nonaqueous electrolyte secondary battery including a positive electrode plate including a positive electrode current collector and a positive electrode mixture layer, formed thereon, containing a positive electrode active material; a negative electrode plate including a negative electrode current collector and a negative electrode mixture layer, formed thereon, containing a negative electrode active material; a separator: a nonaqueous electrolyte; an outer can; and a sealing body. The positive electrode and negative electrode plates are wound with the separator there between. The positive electrode active material contains a lithium-nickel composite oxide containing cobalt and aluminium as constituent elements. The negative electrode active material contains graphite and a silicon material. The negative electrode plate includes negative electrode current collector-exposed portions, located at both ends thereof in a longitudinal direction, not covered by the negative electrode mixture layer.