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 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: 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 battery includes a bottomed cylindrical case body that accommodates an electrode body and a bottom-portion insulating plate (19) that is disposed between the electrode body and a bottom portion of the case body. The bottom portion of the case body has a gas discharge port that opens when an internal pressure of the battery reaches a predetermined pressure. The bottom-portion insulating plate (19) has a through hole. An aperture ratio, which is a ratio of an area of the through hole with respect to a total area of the insulating plate, is greater than or equal to 10% and less than or equal to 40%. A Young's modulus of the bottom-portion insulating plate at 25° C. is 10 GPa or greater.

Abstract: Battery pack includes battery module, metallic installation substrate, metallic attachment member disposed between battery module and installation substrate, metallic fastening part, and insulating member for electrically insulating fastening part and attachment member, and attachment member and installation substrate, from each other, respectively.

Abstract: A first battery holder and second battery holder are stored in a battery case so as to be adjacent to each other. The first battery holder and second battery holder are wholly rectangular in a plan view. The first battery holder includes a cutout portion on its one edge facing the second battery holder. The same is true for the second battery holder. The cutout portion of the first battery holder and the cutout portion of the second battery holder are disposed so as to be adjacent to each other.

Abstract: Battery pack includes battery module, metallic installation substrate, metallic attachment member disposed between battery module and installation substrate, metallic fastening part, and insulating member for electrically insulating fastening part and attachment member, and attachment member and installation substrate, from each other, respectively.

Abstract: The opening of a cylindrical battery case 1 with a bottom is sealed by a seal assembly 5. The seal assembly 5 has an upper valve plate 13, a lower valve plate 15, and a bottom plate 16. The bottom plate 16 has inner gas vent holes 21. When the inner gas vent holes 21 are viewed from the axial direction of the battery case 1, at least a part of each inner gas vent hole 21 overlaps a valve-hole forming portion 15b of the lower valve plate 15. With this configuration, for example, even when an electrode assembly 20 is pushed up by increased internal pressure of the battery to push up the bottom plate 16, the valve hole is not closed.

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 first battery block has a first cut-away part on a side surface facing a second battery block. The second battery block has a second cut-away part on a side surface facing the first cut-away part such that the second cut-away part faces the first cut-away part. A battery module is provided with a space surrounded by the side surface on which the first battery block has the first cut-away part, the side surface on which the second battery block has the second cut-away part, and an inner side surface of the battery case.

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 battery pack 200 including a plurality of cells 100, in which the plurality of cells 100 are arranged so as to be oriented in the same direction, the cells 100 each have a first safety valve and a second safety valve whose operating pressure is higher than an operating pressure of the first safety valve, the first safety valve of each cell 100 is connected to a first exhaust passage 50, the second safety valve of each cell 100 is connected to a second exhaust passage 60, and the first exhaust passage 50 is spatially separated from the second exhaust passage 60.

Abstract: In a rectangular battery, a lead 9L connected to an electrode plate having a first polarity is connected to a battery case 1 which is an external terminal having the first polarity. A lead 11L connected to an electrode plate having a second polarity is connected to an external terminal 25 having the second polarity, through a connection plate 29. A distance between the battery case 1 and the connection plate 29 at at least one end of the battery case 1 in a long-side direction is equal to or less than the half of the width of the battery case 1 in a short-side direction thereof.

Abstract: An electrode group formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween is housed in a battery case, and a sealing plate seals an opening of the battery case. The sealing plate includes an upper metal plate, a valve, and a lower metal plate that are stacked, an insulating plate is placed on a portion of the electrode group near the opening of the battery case, one of the positive electrode plate or the negative electrode plate of the electrode group is connected to the lower metal plate through a lead, the lower metal plate and the insulating plate have a first opening and a second opening, respectively, and a ratio of S2 is within the range of 1.8-3.3, where S1 represents an area of the first opening, and S2 represents an area of the second opening.

Abstract: A battery pack comprising: a secondary battery including a safety valve; a gas absorption portion including a gas absorbent represented by zeolite and a container hermetically enclosing the gas absorbent; and a case housing the secondary battery and the gas absorption portion. The safety valve is configured to discharge a gas produced in the secondary battery at the time of abnormality. The container includes a principal surface facing the safety valve, for example, and when the gas is discharged, the container is unsealed by rupturing of at least the principal surface of the container by an effect of heat or pressure of the gas.

Abstract: A cooling unit 20 is provided in the vicinity of a cell 10, and includes a sealed portion 22 formed by sealing a sheet 21. An easy-to-open portion 24 is provided in part of the sealed portion 22, and the easy-to-open portion 24 is opened when the cell 10 abnormally generates heat.

Abstract: Battery pack includes battery module, metallic installation substrate, metallic attachment member disposed between battery module and installation substrate, metallic fastening part, and insulating member for electrically insulating fastening part and attachment member, and attachment member and installation substrate, from each other, respectively.

Abstract: Battery block includes a plurality of cells having safety valve on the negative electrode side, positive electrode plate part provided to the positive electrode side of cells and negative electrode plate part provided to the negative electrode side of cells in order to connect cells in parallel, duct cover covering the negative electrode side of cells and constituting duct chamber for exhausting exhaust gas discharged from safety valve, and insulating case for housing cells inside thereof. Negative electrode plate part is an elastic electrode plate part in elastic contact with negative electrode terminal, and duct cover is integrated with negative electrode plate part while pressing negative electrode plate part against negative electrode terminal at a predetermined pressing pressure.

Abstract: Battery module includes a plurality of battery blocks, and connecting member for aligning and connecting the plurality of battery blocks in a predetermined arrangement direction. Each of battery blocks includes the following elements: a plurality of batteries longitudinally aligned with each other; battery case for arranging and holding the plurality of batteries; lid as a positive electrode-side insulating lid, disposed at positive electrode-side ends of batteries in battery case, for insulating positive electrodes of the batteries from positive electrode current collecting plate; lid as a negative electrode-side insulating lid, disposed at negative electrode-side ends of batteries in battery case, for insulating negative electrodes of batteries from a negative electrode current collecting plate; and at least a pair of guide grooves disposed on lid and extending in a direction parallel to each other. A pair of sliding parts provided to the connecting member is fitted into guide grooves.

Abstract: Batteries 100 are accommodated in a case 20, wherein the batteries 100 each include an opening portion 8a for releasing gas produced in an associated one of the batteries to outside the battery, the case 20 is partitioned into an accommodation section 50 configured to accommodate the batteries 100 and an exhaust passage 60 configured to expel the gas released from at least one of the opening portions 8a of the batteries 100 to outside the case 20, the opening portions 8a of the batteries 100 are allowed to communicate with the exhaust passage 60 through sealed connection passages 40, and a one-way open valve 70 which is configured to open only along a direction from the opening portion 8a of the battery 100 to the exhaust passage 60 is provided in an intermediate portion or at an end of each of the connection passages 40.