Abstract: The present disclosure aims to suppress, in a winding type electrode body in which a negative electrode lead is bonded to a winding start side end of a negative electrode collector, electrode plate deformation in association with charge/discharge cycles. A nonaqueous electrolyte secondary battery according to one aspect of the present disclosure includes a winding type electrode body (14). A negative electrode (12) includes a negative electrode lead (20a) bonded to a winding start side end of a negative electrode collector and is wound at least one turn from a winding-direction inner end so as not to face a positive electrode (11) with a separator (13) interposed therebetween. The negative electrode (12) includes an insulating tape (40) adhered to the negative electrode collector so as to straddle a surface of the negative electrode lead (20a) in a winding direction.

Abstract: The present disclosure aims to provide a nonaqueous electrolyte secondary battery in which electrode plate deformation in association with charge/discharge cycles is suppressed. A nonaqueous electrolyte secondary battery which is one example of an embodiment of the present disclosure includes a winding type electrode body (14). The electrode body (14) is provided with a tape (50) adhered to an exposed portion (42) which is provided at an outermost circumferential surface and at which a negative electrode collector is exposed. The tape (50) is adhered to the exposed portion (42) so as not to be overlapped with at least one of a winding-finish side end (31e) of positive electrode mixture layers and a winding-finish side end (41e) of negative electrode mixture layers in a radius direction of the electrode body (14).

Abstract: A nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. An embodiment includes a winding type electrode body in which a positive electrode and a negative electrode are spirally wound with at least one separator interposed therebetween. In a negative electrode mixture layer, a silicon compound is contained as a negative electrode active material. A winding-start side end of the negative electrode mixture layer extends to a winding-start end side of the electrode body past a winding-start side end of a positive electrode mixture layer. A length Y (mm) of a portion of the negative electrode mixture layer extending from the winding-start side end of the positive electrode mixture layer and a rate X (percent by mass) of the silicon compound with respect to the total mass of the negative electrode active material satisfy a relationship of Y?3X?15 (6?X?15).

Abstract: The purpose of the present disclosure is to prevent, in a nonaqueous electrolyte secondary battery, a tape adhered to an outermost peripheral surface of an electrode group from breaking due to charging and discharging. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure includes a winding-type electrode group and tapes adhered to an outermost peripheral surface of the electrode group so that an electrode group winding end E is fixed to the outermost peripheral surface of the electrode group. The tapes include: two adhesive regions including a substrate layer and an adhesive layer; and a non-adhesive region sandwiched between the two adhesive regions and consisting only of the substrate layer. The non-adhesive region is disposed so as to extend across the winding end E, which is positioned on the outermost periphery of the electrode group, in the winding direction.

Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery capable of suppressing deformation such as bending of a positive electrode and a negative electrode when an electrode body expands. The non-aqueous electrolyte secondary battery that is an example of the embodiment of the present disclosure has a wound electrode body in which a band-shaped positive electrode and a band-shaped negative electrode are wound with a separator interposed therebetween, and a cylindrical metal outer body accommodating the electrode body.

Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode plate, a negative electrode current collector lead joined to the inner peripheral end of the negative electrode plate, and a negative electrode current collector-exposed part where a negative electrode active material layer is not formed at the outer peripheral-side end. The negative electrode current collector-exposed part at the outer peripheral end comes in contact with a battery case, and in a plane vertical to the axis of an electrode body, a line connecting the axis and the center of a positive electrode current collector lead does not coincide with a line connecting the axis and the center between the coating end of the outer peripheral-side negative electrode active material layer of the negative electrode plate and the terminal part of the outer peripheral-side positive electrode plate.

Abstract: This nonaqueous electrolyte secondary battery includes a winding-type electrode group which comprises a positive electrode plate and a negative electrode plate, and tape adhered on the peripheral surface of the electrode group. A current collector of the negative electrode plate is exposed in at least part of the outermost peripheral surface of the electrode group in the winding direction, and the current collector contacts a case body. The tape comprises a base material layer and an adhesive layer arranged continuously in the winding direction on the inner surface of the wound base material layer. Dividing the region seen from the wound inner surface of the tape into first regions configured from the base material layer and second regions configured from the base material layer and the adhesive layer, the first regions are interposed between second regions in at least part of the area of the tape in the winding direction.

Abstract: A battery including an electrode group with a positive electrode plate and a negative electrode plate, and tape. A current collector of the negative electrode plate is exposed in at least part of the outermost peripheral surface of the electrode group in the winding direction, and the current collector contacts a case body. The tape comprises a base material layer and an adhesive layer arranged continuously in the winding direction on the inner surface of the wound base material layer. Dividing the region of the tape, seen from the wound inner surface, into first regions configured from the base material layer and second regions configured from the base material layer and the adhesive layer, in the winding axial direction of the electrode group, the first regions are arranged adjacent to a second region in at least the center end of the electrode group on the both ends of the tape.

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes: a wound electrode assembly (14) formed by spirally winding, via a separator (13), a positive electrode (11) and a negative electrode (12) in which a negative electrode mixture layer is formed on a negative electrode core, where: the negative electrode (12) includes a non-opposing portion (12a) that is wound 1.25 turns or more from an inner edge in a winding direction of the wound electrode assembly (14) without facing the positive electrode via the separator (13); the non-opposing portion (12a) includes a negative electrode mixture layer-formed portion (12c) in which the negative electrode mixture layer is formed on at least either side continuously in an inward winding direction from an outer edge in the winding direction; and the negative electrode mixture layer-formed portion (12c) is wound 0.75 turns or more.

Abstract: A battery including an electrode group with a positive electrode plate and a negative electrode plate, and tape. A current collector of the negative electrode plate is exposed in at least part of the outermost peripheral surface of the electrode group in the winding direction, and the current collector contacts a case body. The tape comprises a base material layer and an adhesive layer arranged continuously in the winding direction on the inner surface of the wound base material layer. Dividing the region of the tape, seen from the wound inner surface, into first regions configured from the base material layer and second regions configured from the base material layer and the adhesive layer, in the winding axial direction of the electrode group, the first regions are arranged adjacent to a second region in at least the center end of the electrode group on the both ends of the tape.

Abstract: This nonaqueous electrolyte secondary battery includes a winding-type electrode group which comprises a positive electrode plate and a negative electrode plate, and tape adhered on the peripheral surface of the electrode group. A current collector of the negative electrode plate is exposed in at least part of the outermost peripheral surface of the electrode group in the winding direction, and the current collector contacts a case body. The tape comprises a base material layer and an adhesive layer arranged continuously in the winding direction on the inner surface of the wound base material layer. Dividing the region seen from the wound inner surface of the tape into first regions configured from the base material layer and second regions configured from the base material layer and the adhesive layer, the first regions are interposed between second regions in at least part of the area of the tape in the winding direction.

Abstract: It is an object of the present disclosure to suppress electrode plate deformation that may be a cause of an internal short-circuit from occurring in a configuration in which a tape is attached to the outermost circumferential surface of an electrode group in a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an aspect of the present disclosure includes a roll-type electrode group including a positive electrode plate and a negative electrode plate and a tape attached to the outermost circumferential surface of the electrode group. The tape has two adhesion regions each including a base material layer and an adhesive layer and a non-adhesion region that is interposed between the two adhesion regions and that is composed of a base material layer only.

Abstract: A non-aqueous electrolyte secondary battery including an electrode body in which a positive electrode plate including a belt-shaped positive electrode current collector and a positive electrode active material layer formed on a surface of the positive electrode current collector and a negative electrode plate including a belt-shaped negative electrode current collector and a negative electrode active material layer formed on a surface of the negative electrode current collector are wound with an insulating separator interposed there between. At the outermost periphery of the electrode body, a negative electrode current collector exposed portion, in which the negative electrode current collector is exposed, is provided, and a winding-finish end of the negative electrode plate is fixed with tapes attached to the negative electrode current collector exposed portion.

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: The present disclosure aims to suppress, in a winding type electrode body in which a negative electrode lead is bonded to a winding start side end of a negative electrode collector, electrode plate deformation in association with charge/discharge cycles. A nonaqueous electrolyte secondary battery according to one aspect of the present disclosure includes a winding type electrode body (14). A negative electrode (12) includes a negative electrode lead (20a) bonded to a winding start side end of a negative electrode collector and is wound at least one turn from a winding-direction inner end so as not to face a positive electrode (11) with a separator (13) interposed therebetween. The negative electrode (12) includes an insulating tape (40) adhered to the negative electrode collector so as to straddle a surface of the negative electrode lead (20a) in a winding direction.

Abstract: A nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. An embodiment includes a winding type electrode body in which a positive electrode and a negative electrode are spirally wound with at least one separator interposed therebetween. In a negative electrode mixture layer, a silicon compound is contained as a negative electrode active material. A winding-start side end of the negative electrode mixture layer extends to a winding-start end side of the electrode body past a winding-start side end of a positive electrode mixture layer. A length Y (mm) of a portion of the negative electrode mixture layer extending from the winding-start side end of the positive electrode mixture layer and a rate X (percent by mass) of the silicon compound with respect to the total mass of the negative electrode active material satisfy a relationship of Y?3X?15 (6?X?15).

Abstract: In a nonaqueous electrolyte secondary battery according to one example of an embodiment, a winding type electrode body includes, at an outermost circumferential surface thereof, an exposed portion of a negative electrode collector and is provided with a tape which is adhered on the outermost circumferential surface from a winding-finish side end portion of a negative electrode and past a winding-finish end of the electrode body. The exposed portion is in contact with an inner circumferential surface of an exterior package can, and the tape has an easy-tear line formed in an extension portion extending from a position overlapping with the winding-finish end to a side opposite to an inner winding direction.

Abstract: The purpose of the present disclosure is to prevent, in a nonaqueous electrolyte secondary battery, a tape adhered to an outermost peripheral surface of an electrode group from breaking due to charging and discharging. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure includes a winding-type electrode group and tapes adhered to an outermost peripheral surface of the electrode group so that an electrode group winding end E is fixed to the outermost peripheral surface of the electrode group. The tapes include: two adhesive regions including a substrate layer and an adhesive layer; and a non-adhesive region sandwiched between the two adhesive regions and consisting only of the substrate layer. The non-adhesive region is disposed so as to extend across the winding end E, which is positioned on the outermost periphery of the electrode group, in the winding direction.

Abstract: The present disclosure aims to provide a nonaqueous electrolyte secondary battery in which electrode plate deformation in association with charge/discharge cycles is suppressed. A nonaqueous electrolyte secondary battery which is one example of an embodiment of the present disclosure includes a winding type electrode body (14). The electrode body (14) is provided with a tape (50) adhered to an exposed portion (42) which is provided at an outermost circumferential surface and at which a negative electrode collector is exposed. The tape (50) is adhered to the exposed portion (42) so as not to be overlapped with at least one of a winding-finish side end (31e) of positive electrode mixture layers and a winding-finish side end (41e) of negative electrode mixture layers in a radius direction of the electrode body (14).

Abstract: A nonaqueous electrolyte secondary battery includes a negative electrode plate, a negative electrode current collector lead joined to the inner peripheral end of the negative electrode plate, and a negative electrode current collector-exposed part where a negative electrode active material layer is not formed at the outer peripheral-side end. The negative electrode current collector-exposed part at the outer peripheral end comes in contact with a battery case, and in a plane vertical to the axis of an electrode body, a line connecting the axis and the center of a positive electrode current collector lead does not coincide with a line connecting the axis and the center between the coating end of the outer peripheral-side negative electrode active material layer of the negative electrode plate and the terminal part of the outer peripheral-side positive electrode plate.