Abstract: This non-aqueous electrolyte secondary battery comprises an electrode body in which a first separator, a positive electrode plate, a second separator, and a negative electrode plate are layered and coiled for 10 or more turns. The electrode body includes: a flat section in which the outer peripheral surface is flat; and two curved surface sections which are disposed at both ends in a first direction of the flat section and in which the outer peripheral surface is curved. The non-aqueous electrolyte secondary battery includes: a winding-end tape that is adhered to the outermost peripheral surface of the electrode body; and a positive electrode protective tape that is adhered to a winding-start-side end section on the inner peripheral side of the positive electrode plate. The winding-end tape is disposed on one of the two curved surface sections.

Abstract: W1/T1 is equal to or greater than 5, assuming that the width of an electrode body in a direction perpendicular to a winding axis direction and a thickness direction of the electrode body is W1 (mm) and the thickness of the electrode body 3 is T1 (mm).

Abstract: According to the present disclosure, a secondary battery capable of inhibiting precipitation of metallic lithium is provided. The secondary battery disclosed herein includes a flat wound electrode body. A positive electrode starting end portion inside the electrode body has a first region extending along a flat portion of the electrode body. On the other hand, a negative electrode starting end portion inside the electrode body has a second region extending along the flat portion, a folded portion folded back from an end portion of the second region, and a third region extending from an end portion of the folded portion. In addition, the electrode body has an electrode starting end stacked portion in which the first region, the second region, and the third region overlap. According to such a configuration, it is possible to prevent a partial pressing failure from occurring and inhibit the precipitation of metallic lithium.

Abstract: A battery disclosed herein includes: an exterior body including a bottom wall and an opening facing the bottom wall; a sealing plate sealing the opening of the exterior body; and one or a plurality of wound electrode bodies, in which a band-shaped positive electrode including a positive electrode active material layer and a band-shaped negative electrode including a negative electrode active material layer are laminated via a band-shaped separator and are wound around a winding axis. A length of the positive electrode active material layer is 15 cm or more in a winding axis direction of the wound electrode body. A plurality of winding stop tapes are attached to an outer surface of the wound electrode body at intervals in the winding axis direction.

Abstract: The battery disclosed here comprises one or more wound electrode bodies each composed of a strip-shaped first electrode plate and a strip-shaped second electrode plate superimposed and wound together with a strip-shaped separator between the two, and a battery case containing the wound electrode body or bodies. The first electrode plate has multiple electrode tabs protruding from an edge extending in the longitudinal direction, and the multiple electrode tabs include a first electrode tab having a straight part that is roughly perpendicular to the edge and has a length of at least 2 mm in the direction orthogonal to the edge, and second electrode tabs lacking the straight part.

Abstract: Disclosed here is a battery including: an exterior body having a bottom wall; and a winding electrode body in which positive electrode, negative electrode and separator are wound about a winding axis. The winding electrode body has a flat shape having a pair of curvature parts having a curved outside surface and a flat part that connects the pair of curvature parts to each other and has a flat outside surface. When a line perpendicular to the winding axis of the winding electrode body and perpendicular to the bottom wall of the exterior body is assumed as L1, a portion positioned at an outermost periphery of the negative electrode in at least one of the pair of the curvature parts faces a portion positioned on a winding inner peripheral side of the negative electrode via the separator and not via the positive electrode on the line L1.

Abstract: A decrease in energy density of a battery is suppressed, and the occurrence of internal short circuit between a positive plate and a negative plate located at the innermost circumference of a curved portion of a flat electrode assembly, where the curvature of the curved portion is greatest, is suppressed. In a nonaqueous electrolyte secondary battery including a flat wound electrode assembly (14), the electrode assembly (14) has a pair of curved portions (20A, 20B) located at either end and a flat portion (21) located between the pair of curved portions. In at least one of the curved portions, at least two layers of a second electrode plate are disposed on an inner side of a curved portion of a first electrode plate located at an innermost circumference.

Abstract: A battery pack includes a battery unit including rectangular secondary batteries, each including a sealing plate and positive and negative electrode terminals attached to the sealing plate; a bus bar that connects the rectangular secondary batteries together in parallel; an insulating plate disposed between the sealing plates of the rectangular secondary batteries and the bus bar; and a short-circuit breaking portion that interrupts an electric conduction path between the rectangular secondary batteries connected in parallel by allowing each sealing plate to bulge outward in response to an internal pressure rise of the battery to push up the insulating plate and the bus bar. A portion of each sealing plate that bulges most protrudes outward by greater than or equal to 1.5 mm from an outer peripheral edge of the sealing plate when a pressure in the corresponding rectangular secondary battery reaches the operating pressure of a gas release valve.

Abstract: A battery pack includes a battery unit including rectangular secondary batteries, each including a sealing plate and positive and negative electrode terminals attached to the sealing plate; a bus bar that connects the rectangular secondary batteries together in parallel; an insulating plate disposed between the sealing plates of the rectangular secondary batteries and the bus bar; and a short-circuit breaking portion that interrupts an electric conduction path between the rectangular secondary batteries connected in parallel by allowing each sealing plate to bulge outward in response to an internal pressure rise of the battery to push up the insulating plate and the bus bar. A portion of each sealing plate that bulges most protrudes outward by greater than or equal to 1.5 mm from an outer peripheral edge of the sealing plate when a pressure in the corresponding rectangular secondary battery reaches the operating pressure of a gas release valve.

Abstract: A driving force distributing apparatus is configured to distribute a driving force from an engine to right and left wheels in a manner that the driving force is differentially transmittable to the wheels and the transmission of the driving force is interruptible. The apparatus includes: a differential case; a differential gear mechanism including a pair of side gears and a plurality of pinion gears; an intermediate shaft coupled to one of the side gears such that the intermediate shaft is not rotatable relative to this side gear; and a clutch mechanism to transmit a driving force from the intermediate shaft to one of the wheels in a manner that the transmission of the driving force is interruptible. The clutch mechanism includes: coaxial relatively rotatable first and second rotational members; and a plurality of clutch plates disposed between the rotational members. The first rotational member is spline-fitted to the intermediate shaft.

Abstract: A driving force transmitting apparatus is provided which enables rotational resistance of rotating members to be suppressed while sufficiently supplying lubricant to a friction clutch. A driving force transmitting apparatus includes a clutch drum having a cylindrical portion, an inner shaft having an end housed in the clutch drum, a friction clutch having outer clutch plates that rotate along with the clutch drum and inner clutch plates that rotate along with the inner shaft, a piston that presses the friction clutch, and a housing in which a first housing chamber housing the friction clutch is formed and in which a storage chamber storing lubricant scooped up by rotation of the clutch drum is also formed. The lubricant stored in the storage chamber returns to the first housing chamber through an inner circulation path leading to inside the clutch drum and an outer circulation path leading to outside the clutch drum.

Abstract: A flat wound electrode assembly formed by winding a positive electrode plate and a negative electrode plate together with a separator interposed therebetween is used. The number of stacked layers of the positive electrode plate in the wound electrode assembly is 50 or more. The total thickness of the separator is 10% or less of the thickness of the wound electrode assembly in a thickness direction of the layers of the wound electrode assembly. A value obtained by dividing the local breaking elongation of the separator by the thickness of the separator is 0.16 or more. A value obtained by dividing the local breaking strength of the separator by the thickness of the separator is 2.77 or more.

Abstract: A negative electrode current collector is placed on outer sides of two outermost surfaces of a layered negative electrode core-exposed portion, and a negative electrode conductive member is placed between first and second layered negative electrode core-exposed portions formed by dividing the layered negative electrode core-exposed portion into two parts. A resistance-welding electrode is brought into contact with the negative electrode current collector from the side opposite to the layered negative electrode core-exposed portion side, and the negative electrode current collector, the layered negative electrode core-exposed portion, and the negative electrode conductive member are resistance-welded together.

Abstract: A driving force transmitting apparatus includes a clutch drum having a cylindrical portion, an inner shaft having an end housed in the clutch drum, a friction clutch having outer clutch plates that rotate along with the clutch drum and inner clutch plates that rotate along with the inner shaft, a piston that presses the friction clutch, and a housing in which a first housing chamber housing the friction clutch is formed. The friction clutch is lubricated with a lubricant fed through an opening. The housing is provided with a storage chamber in which the lubricant scooped up by rotation of the clutch drum is stored and a lubricant supply hole which allows the lubricant stored in the storage chamber to be fed from inside the piston to the first housing chamber.

Abstract: A driving force transmission apparatus includes: a meshing member that switches two rotating members between a coupled state and an uncoupled state; a piston member with a plurality of locked portions formed along a circumferential direction; an armature that moves the piston member forward and backward between a first position where the armature presses the piston member in an axial direction and a second position where the armature does not press the piston member; a biasing member that biases the piston member in the opposite direction from the pressing direction of the armature; and a locking member that locks the locked portions. The piston member has a mechanism that mitigates a possible shock when the locking member comes into abutting contact with an abutting contact surface of a first locked portion.

Abstract: A driving force distributing apparatus is configured to distribute a driving force from an engine to right and left wheels in a manner that the driving force is differentially transmittable to the wheels and the transmission of the driving force is interruptible. The apparatus includes: a differential case; a differential gear mechanism including a pair of side gears and a plurality of pinion gears; an intermediate shaft coupled to one of the side gears such that the intermediate shaft is not rotatable relative to this side gear; and a clutch mechanism to transmit a driving force from the intermediate shaft to one of the wheels in a manner that the transmission of the driving force is interruptible. The clutch mechanism includes: coaxial relatively rotatable first and second rotational members; and a plurality of clutch plates disposed between the rotational members. The first rotational member is spline-fitted to the intermediate shaft.

Abstract: A driving force transmitting apparatus includes a clutch drum having a cylindrical portion, an inner shaft having an end housed in the clutch drum, a friction clutch having outer clutch plates that rotate along with the clutch drum and inner clutch plates that rotate along with the inner shaft, a piston that presses the friction clutch, and a housing in which a first housing chamber housing the friction clutch is formed. The friction clutch is lubricated with a lubricant fed through an opening. The housing is provided with a storage chamber in which the lubricant scooped up by rotation of the clutch drum is stored and a lubricant supply hole which allows the lubricant stored in the storage chamber to be fed from inside the piston to the first housing chamber.

Abstract: A driving force transmitting apparatus is provided which enables rotational resistance of rotating members to be suppressed while sufficiently supplying lubricant to a friction clutch. A driving force transmitting apparatus includes a clutch drum having a cylindrical portion, an inner shaft having an end housed in the clutch drum, a friction clutch having outer clutch plates that rotate along with the clutch drum and inner clutch plates that rotate along with the inner shaft, a piston that presses the friction clutch, and a housing in which a first housing chamber housing the friction clutch is formed and in which a storage chamber storing lubricant scooped up by rotation of the clutch drum is also formed. The lubricant stored in the storage chamber returns to the first housing chamber through an inner circulation path leading to inside the clutch drum and an outer circulation path leading to outside the clutch drum.

Abstract: A driving force transmission device includes: a switch member that switches a first rotary member and a second rotary member between a coupled state and a decoupled state; a second friction member that generates a frictional force between the rotary members; a piston member that has first to sixth engaged portions formed in the shape of a staircase and that presses the switch member and the second friction member in an axial direction; a biasing mechanism that presses the switch member and the second friction member toward the piston member; and an engaging member that engages with one of the plurality of engaged portions. The engaging member rotates the piston member by sliding on a plurality of tilted surfaces of the plurality of engaged portions, and the piston member is always pressed toward the engaging member by a biasing force of the biasing mechanism.

Abstract: A driving force transmission apparatus includes: an electric motor; a multi-disc clutch including outer clutch plates and inner clutch plates that are disposed coaxially with each other so as to be rotatable relative to each other and that are frictionally engaged with each other by being pressed in an axial direction; an input rotary member that rotates together with the outer clutch plates; an output rotary member that rotates together with the inner clutch plates; a cam mechanism that generates cam thrust force for pressing the multi-disc clutch in the axial direction upon reception of torque generated by the electric motor; a strain sensor that detects reaction force against the cam thrust force; and a spring member that is disposed between the cam mechanism and the strain sensor and that buffers an impact transmitted from the cam mechanism to the strain sensor.