Abstract: A cylindrical battery according to one aspect of the present invention includes an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an electrolyte liquid; a cylindrical outer can having a bottom portion which receives the electrode body and the electrolyte liquid; and a sealing body sealing an open portion of the outer can. The positive electrode leads extend along an outer circumference portion of a collector member disposed on the electrode body and are connected to a surface of the collector member at an outer side of the battery. The collector member includes a collector plate to which the positive electrode leads are connected and a first insulating plate fitted to a surface of the collector plate at an inner side of the battery.

Abstract: A cylindrical battery according to an embodiment of the present invention includes an electrode body, an electrolyte solution, a tubular exterior can that has a bottom and that accommodates the electrode body and the electrolyte solution, and a sealing body that seals the exterior can. The sealing body includes a valve member, an insulating plate that includes a hollow portion, and a metal plate that has a first through-hole. The insulating plate is disposed between the valve member and the metal plate. At least one of the valve member and the metal plate includes a projection that projects toward an inside of the hollow portion. The valve member and the metal plate are joined to each other at the projection. The insulating plate has a second through-hole that is formed around the hollow portion.

Abstract: A battery storage tray according to an .aspect of the present invention includes a. first pocket portion into which a first end portion of a columnar battery in a longitudinal direction is inserted. The first pocket portion has a cup shape including an opening, a side portion, and a bottom portion. The side portion of the first pocket portion includes a fitting portion, which fits to the columnar battery, and a groove, which defines a space between the groove and the columnar battery. The space defined by the groove is connected to the opening of the first pocket portion. An aspect of the present invention provides a battery storage tray capable of reliably holding the columnar battery and facilitating removal of the columnar battery.

Abstract: The battery is sealed by a sealing member including a safety valve for exhausting the gas generated in the battery to the outside of the battery when the pressure in the battery is increased. A part of the sealing member is formed of a member having a melting point lower than that of high-temperature gas generated in the abnormal time and having a ratio of an area of an opening of the battery case to an area of a gas exhaust hole is 3.0×10?5 or more and 9.1×10?3 or less.

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.

Abstract: A sealed battery including a bottomed cylindrical outer can having an opening, the opening and a sealing body being crimp-sealed with an insulating gasket interposed therebetween, is disclosed. The sealing body includes a first plate-shaped member and a second plate-shaped member bonded to a surface of the first plate-shaped member, the surface facing the outside of the battery. At least the first plate-shaped member is crimp-sealed at an outer periphery thereof, and the crimp-sealed plate-shaped member has a thin portion on at least one surface thereof, the thin portion serving as a starting point of deformation of the sealing body when a battery internal pressure increases. When the battery internal pressure increases, the sealing body is deformed so that a gap is formed between the insulating gasket and the sealing body and gas in the outer can is vented to the outside of the outer can.

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.

Abstract: A cylindrical battery according to one aspect of the present invention includes an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an electrolyte liquid; a cylindrical outer can having a bottom portion which receives the electrode body and the electrolyte liquid; and a sealing body sealing an open portion of the outer can. The positive electrode leads extend along an outer circumference portion of a collector member disposed on the electrode body and are connected to a surface of the collector ember at an outer side of the battery. The collector member includes a collector plate to which the positive electrode leads are connected and a first insulating plate fitted to a surface of the collector plate at an inner side of the battery.

Abstract: A cylindrical battery having a sealing unit which includes at least a valve member, a metal plate disposed farther inside the battery than the valve member and having a joint portion connected to the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The metal plate has a groove-shaped thin portion disposed around the joint portion, and straight portions that have different angles to the normal to the metal plate are disposed on an inner peripheral side and an outer peripheral side of a cross section of the thin portion perpendicular to the longitudinal direction.

Abstract: The battery is sealed by a sealing member including a safety valve for exhausting the gas generated in the battery to the outside of the battery when the pressure in the battery is increased. A part of the sealing member is formed of a member having a melting point lower than that of high-temperature gas generated in the abnormal time and having a ratio of an area of an opening of the battery case to an area of a gas exhaust hole is 3.0×10?5 or more and 9.1×10?3 or less.

Abstract: A cylindrical 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; an electrolyte; a bottomed cylindrical outer can; and a sealing body crimped to an opening of the outer can via a gasket. The sealing body includes a valve body having an annular protrusion part, an insulating member disposed on an inner circumference of the protrusion part of the valve body and having a skirt portion, and a metal plate disposed on an inner circumference of the skirt portion of the insulating member and connected to a center portion of the valve body. The metal plate is crimped with the protrusion part of the valve body via the insulating member.

Abstract: A cylindrical battery according to an aspect of the present invention includes an electrode assembly including a positive electrode plate and a negative electrode plate wound together via a separator, an electrolytic solution, a bottomed cylindrical housing can, and a sealing unit fixed by crimping of an open end of the housing can via a gasket. The sealing unit includes a valve member having a circular outline, a metal plate connected to a central portion of the valve member so as to be farther inside the battery than the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The valve member has a sloping region in which the thickness decreases or increases continuously along the radial direction.

Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case (15), a sealing member (20), a cylindrical wound electrode assembly (14) including a positive electrode plate (11) and a negative electrode plate (12) wound together via a separator (13), and an electrolyte. The cylindrical wound electrode assembly (14) and the electrolyte are accommodated in the exterior case (15). An open end of the exterior case (15) is crimped together with the sealing member (20) via an insulating gasket (21) so as to form a seal. The sealing member (20) includes a valving element (23) having a thin and fragile portion (22) and a support element (25) having an opening (24). The support element (25) is disposed on an outer side of the valving element (23), and a portion of the valving element (23) is exposed to an outside environment along the inner periphery of the opening (24) in the support element (25).

Abstract: A cylindrical battery including an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an upper insulating plate disposed on the electrode body; a positive electrode current collector plate disposed on the upper insulating plate; a sealing body; and an outer can. A first positive electrode lead extends between the upper insulating plate and the current collector plate after passing through a through-hole of the upper insulating plate and is bent onto the current collector plate at an outer circumference portion thereof, and a second positive electrode lead extends along the outside of an outer circumference portion of the upper insulating plate and is bent onto the current collector plate at the outer circumference portion thereof. Those positive electrode leads are all connected to the current collector plate.

Abstract: The battery is sealed by a sealing member including a safety valve for exhausting the gas generated in the battery to the outside of the battery when the pressure in the battery is increased. A part of the sealing member is formed of a member having a melting point lower than that of high-temperature gas generated in the abnormal time and having a ratio of an area of an opening of the battery case to an area of a gas exhaust hole is 3.0×10?5 or more and 9.1×10?3 or less.

Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case, a sealing member, a cylindrical wound electrode assembly and an electrolyte. An open end of the exterior case is crimped together with the sealing member via an insulating gasket so as to form a seal. The sealing member includes a lid having a thin and fragile portion, an insulating ring, and a terminal plate having a thin and fragile portion. The terminal plate is electrically connected to a positive electrode current collector leading out from the cylindrical wound electrode assembly. The lid and the terminal plate are electrically connected within an opening of the insulating ring. The lid is disposed so as to expose an outer side of at least a portion of the lid opposed to the opening of the insulating ring directly to an outside environment.

Abstract: A sealed battery including: an electrode group 4 formed by winding or stacking a positive electrode plate 1 and a negative electrode plate 2 with a separator 3 interposed between the positive electrode plate 1 and the negative electrode plate 2, and housed in a battery case 5, an opening of the battery case 5 being sealed with a sealing plate, wherein a lead 11 extending from one of the electrode plates in the electrode group 4 is laser-welded to the sealing plate 10, and a melting width of an end section 13 of a welded portion 9 between the lead 11 and the sealing plate 10 is smaller than a melting width of a center section of the welded portion 9.

Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case (15), a sealing member (20), a cylindrical wound electrode assembly (14) including a positive electrode plate (11) and a negative electrode plate (12) wound together via a separator (13), and an electrolyte. The cylindrical wound electrode assembly (14) and the electrolyte are accommodated in the exterior case (15). An open end of the exterior case (15) is crimped together with the sealing member (20) via an insulating gasket (21) so as to form a seal. The sealing member (20) includes a valving element (23) having a thin and fragile portion (22) and a support element (25) having an opening (24). The support element (25) is disposed on an outer side of the valving element (23), and a portion of the valving element (23) is exposed to an outside environment along the inner periphery of the opening (24) in the support element (25).

Abstract: A battery includes a power generation component including a positive electrode, a negative electrode, and an electrolyte, and a battery case accommodating the power generation component. The negative electrode includes a first lead (17) having a single layer structure whose main component is nickel, and a second lead (18) having a layered structure including a Ni layer (18a) whose main component is nickel and a Cu layer (18b) whose main component is copper. The battery includes a layered portion (35) formed of the leads that are superposed such that the Ni layer (18a) of the second lead (18) faces the first lead (17). Part of the layered portion (35) is welded to an inner surface of the battery case with the first lead (17) at the layered portion (35) being disposed on a battery case side.

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.