Abstract: The secondary battery includes an electrode assembly to which an electrode lead is attached; a case configured to receive the electrode assembly therein; a lead film configured to surround a part of an outer surface of the electrode lead and interposed between the electrode lead and the case; a vent region formed in at least a part of the case; and a vent member inserted into the vent region and configured to contain linear low-density polyethylene having a poly dispersity index (PDI) of 4 or less, wherein the vent member has a maximum sealing strength of less than 6 kgf/15 mm at 100° C. or above and a maximum sealing strength of 6 kgf/15 mm or more at room temperature to 60° C.

Abstract: A power management device is a power management device that controls a temperature inside a housing in a power storage system that includes a power storage device including a storage battery and the housing for housing the power storage device. The power management device includes an acquisition unit that acquires status information indicating a status of the power storage system, a calculation unit that calculates a target temperature in the housing based on an allowable capacity deterioration rate of the storage battery, and an air volume control unit that controls an air volume of a fan provided in the housing based on the status information and the target temperature.

Abstract: Provided is a secondary battery including an electrode assembly and an electrolyte enclosed in an exterior case. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The secondary battery includes a spacer positioned between the electrode assembly and an exterior case, and the electrode assembly includes current collecting tabs of a positive electrode and a negative electrode each protruding from the same end face. The spacer is positioned between an end face, of the electrode assembly, from which the current collecting tab protrudes and the exterior case, and at least one of the current collecting tabs of the positive electrode or the negative electrode has a bent shape between the electrode assembly and the spacer.

Abstract: A secondary battery including an electrode wound body having a structure in which a positive electrode and a negative electrode are stacked and wound with a separator interposed therebetween, a positive electrode current collector plate, a negative electrode current collector plate, and an exterior can that accommodates the electrode wound body, the positive electrode current collector plate, and the negative electrode current collector plate. The positive electrode has a first covered portion covered with a positive electrode active material layer and a positive electrode active material non-covered portion on a positive electrode foil, and the negative electrode has a second covered portion covered with a negative electrode active material layer and a negative electrode active material non-covered portion on a negative electrode foil.

Abstract: A non-aqueous electrolyte secondary battery according to one aspect of the present application comprises: a positive electrode; a negative electrode; a heat-resistant layer that is formed on at least one of the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein the heat-resistant layer includes heat-resistant particles, at least the surface of said heat-resistant particles comprising a metal compound, the average thickness of the heat-resistant layer is within the range 0.5 ?m-5 ?m, the porosity of the heat-resistant layer is 25%-55%, the average surface roughness (Ra) of the heat-resistant layer is 0.35 ?m or less, and the electronegativity of metal ions of the metal compound is 13.5 or greater.

Abstract: A secondary battery comprises: an electrode assembly in which a first electrode plate having a first non-coated part protruding in a first direction, a second electrode plate having a second non-coated part protruding in a second direction opposite to the first direction, and a separator between the first electrode plate and the second electrode plate, are wound; a first current collecting plate electrically coupled to the first non-coated part; a second current collecting plate electrically coupled to the second non-coated part, and having an end part protruding beyond the first current collecting plate by penetrating the winding center of the electrode assembly; and an insulation member between the end part of the second current collecting plate and the first current collecting plate, wherein the end part of the second current collecting plate is coupled with the insulation member.

Abstract: A positive electrode active substance, wherein: the average primary particle diameter of an Ni-containing lithium complex oxide A is 0.5 ?m or greater, and is greater than the average primary particle diameter (0.05 ?m or greater) of an Ni-containing lithium complex oxide B; and the average secondary particle diameter of the Ni-containing lithium complex oxide A is 2-6 ?m, and is less than the average secondary particle diameter (10-20 ?m) of the Ni-containing lithium complex oxide B. The Ni-containing lithium complex oxides A, B contain 55 mol % or more of Ni relative to the total mol of metal elements excluding Li, have a crystallite diameter of 100-200 nm, and are such that the disorder of elemental Ni is 3% or less.

Abstract: A battery includes a positive electrode current collector, a positive electrode, a first electrolyte layer, a second electrolyte layer, a negative electrode, and a negative electrode current collector in this order. The first electrolyte layer contains a first solid electrolyte material, and the second electrolyte layer contains a second solid electrolyte material, the second solid electrolyte material being different from the first solid electrolyte material. An oxidation potential of the first solid electrolyte material is more noble than an oxidation potential of the second solid electrolyte material. The first electrolyte layer covers the positive electrode and is in contact with the positive electrode current collector, and/or the first electrolyte layer covers the second electrolyte layer and is in contact with the negative electrode current collector.

Abstract: A battery includes a positive electrode current collector, a positive electrode, a first electrolyte layer, a second electrolyte layer, a negative electrode, and a negative electrode current collector in this order. The first electrolyte layer contains a first solid electrolyte material, and the second electrolyte layer contains a second solid electrolyte material, the second solid electrolyte material being different from the first solid electrolyte material. A reduction potential of the second solid electrolyte material is less noble than a reduction potential of the first solid electrolyte material. The second electrolyte layer covers the negative electrode and is in contact with the negative electrode current collector, and/or the second electrolyte layer covers the first electrolyte layer and is in contact with the positive electrode current collector.

Abstract: A coin-type lithium secondary cell for soldering by reflow method includes a positive electrode including a lithium composite oxide, a negative electrode, an electrolyte layer provided between the positive electrode and the negative electrode and including an electrolytic solution, a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. The positive electrode and the negative electrode as a whole contains 3.0% by mass or less of lithium carbonate.

Abstract: Provided is a lithium secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes, as a positive electrode active material, a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 50 atm % or more of total transition metals, and wherein the layered structure of the positive electrode active material is phase-transformed into a spinel structure at a temperature of 300° C. or more in a fully charged state.

Abstract: Problem: The invention provides a separator for a lithium-ion secondary battery exhibiting excellent strength, wettability with nonaqueous electrolyte solutions, voltage endurance and cycle characteristics in lithium-ion secondary batteries, and a method of increasing the puncture depth of the separator. Solution: A separator for a lithium-ion secondary battery is formed of a microporous film comprising a polyolefin resin (A) as a major component, and a resin (B), at least portions of the surfaces of the micropores in the microporous film being coated with resin (B).

Abstract: Provided is a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes positive active material particles having a layered rock salt type crystal structure. A filling ratio of the positive active material particles in the positive electrode is 85% or more. The positive active material particles include broken particles in which a longest diameter is within a range from 15 ?m to 30 ?m. A crack with a length ? times or more and ? times or less the longest diameter of the broken particles is present. The crack has an intersection, and an abundance ratio x of broken particle is 20% or less.

Abstract: A non-aqueous secondary battery includes a positive electrode composite material layer. In a cross-section in a direction of thickness of the positive electrode composite material layer, the positive electrode composite material layer includes a first region including one end portion in a direction intersecting with the direction of thickness, a second region including the other end portion, and a third region lying between the first region and the second region. The first region is composed of a first composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide, and the second region is composed of a second composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide. The third region is composed of a third composite material containing lithium nickel cobalt manganese composite oxide.

Abstract: A battery cell includes an inner plastic layer, an outer plastic layer, and a middle metal layer. The inner and outer plastic layers extends along at least three of sides of the battery cell. The middle metal layer is disposed between the inner and outer plastic layers. The middle metal layer extends along the at least three sides of the battery cell and projects from at least a fourth side of the battery cell to form at least one heat dissipation tab. The at least one heat dissipation tab is configured to transfer heat to at least one cooling plate through thermal conduction. The fourth side of the battery cell connects two of the at least three sides to one another.

Abstract: The present application relates to a cathode, a method of manufacturing the same, and a battery including the same. The present application may provide a cathode and a method of manufacturing the same, wherein the cathode comprises an active material layer that contains an acrylic polymer and exhibits excellent resistance to an electrolyte, excellent dispersion of its components and great adhesion to a current collector.

Abstract: An electric energy storage system includes: an electric energy storage device; and a control device configured to perform charge and discharge control and temperature adjustment control of the electric energy storage device. The electric energy storage device is configured to be electrically connected to a power network. The control device is configured such that execution of the temperature adjustment control of the electric energy storage device is restricted when the control device performs the charge and discharge control so as to alleviate power shortage on the power network according to a request from a management computer for the power network.

Abstract: A battery system includes an enclosure having opposed first and second major walls, a perimetral wall connecting the first and second major walls along respective perimeters thereof, and an interior defined by the first and second major walls and the perimetral wall, wherein the enclosure is configured for containing an anode assembly, a cathode assembly and an electrolyte within the interior. A longitudinal embossment is formed in the perimetral wall extending outward from the interior and extending along opposed adjacent portions of the first and second perimeters. A wall port is defined in the perimetral wall in fluid communication with the interior, wherein the wall port is configured for permitting flow of the electrolyte therethrough into and out of the interior. First and second electrodes extend through the perimetral wall and are configured for electrical connection with the anode assembly and cathode assembly, respectively.

Abstract: Provided are a lithium composite metal compound having excellent cycle characteristics in the case of being used as battery materials, a positive electrode active material for a lithium secondary battery using the same, a positive electrode using the same, and a lithium secondary battery using the same. The lithium composite metal compound is represented by Composition Formula (I), in which physical property values of pores that are obtained from measurement of nitrogen adsorption and desorption isotherms at a liquid nitrogen temperature satisfy requirements (1) and (2).

Abstract: In a lithium ion secondary battery (1), a positive electrode (2) and a negative electrode (3) are alternately adjacent to each other via separators (4) and (5). The positive electrode (2) includes a positive electrode current collector composed of a metal porous body, a first positive electrode active material (21) held on one side of the positive electrode current collector, and a second positive electrode active material (22) held on the other side. The negative electrode (3) includes a negative electrode current collector composed of a metal porous body, a first negative electrode active material (31) held on one side of the negative electrode current collector, and a second negative electrode active material (32) held on the other side. The first positive electrode active material (21) faces the first negative electrode active material (31), and the positive electrode active material (22) faces the second negative electrode active material (32).