Abstract: Provided is a method for manufacturing a electrode for a secondary battery in which the electrode has a first layer and a second layer laminated on a current collector. The method comprising applying a slurry for a first layer to a surface of a current collector, applying a slurry for a second layer to the slurry for the first layer before the slurry for the first layer is dried, and drying the slurries for the first layer and the second layer after applying the slurries for the first layer and the second layer to obtain a laminated structure in which the first layer and the second layer are laminated in this order on the current collector.

Abstract: A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention is covered with an insulating layer. The cathode 11 and the anode 12 are oriented such that the burr 11b of the cathode 11 and the burr 12b of the anode 12 of the opposing cathode 11 and the opposing anode 12 close to at least the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 do not face each other 12 are opposed to each other.

Abstract: A method of manufacturing an electrode, comprising the steps of; forming a first layer by intermittently applying a layer to a current collecting foil with thickness of 40 ?m or more and 300 ?m or less; and forming a second layer, wherein the second layer is formed both on a region where the first layer has been formed on the current collecting foil and an exposed region where the current collecting foil is exposed without being formed the first layer; wherein in the step of forming of second layer, providing a gap of 40 ?m or more between a applying part of application apparatus and the current collecting foil, based on a positional information of the first layer, from during applying a layer to the exposed region to during applying a layer to the first layer.

Abstract: A film package battery 1 has a battery element (20) having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package (10) enclosing the battery element; and a fixing tape (70) fixed to a part of the battery element and fixed to an inner surface of the film package.

Abstract: The present invention provides a lithium ion secondary battery comprising: a positive electrode; a negative electrode comprising a negative electrode active material comprising at least one carbon material selected from the group consisting of a natural graphite, an artificial graphite, a non-graphitizable carbon and a graphitizable carbon; and an electrolyte solution comprising a specific cyclic disulfonate ester compound and an acid anhydride.

Abstract: The secondary battery comprises: a battery element 20 having a positive electrode 30 wherein positive active material 31 are applied on both surfaces of a positive current collector 32, a negative electrode 40 wherein negative active material 41 are applied on both surfaces of a negative current collector 42, and a separator; a packaging film 10, made of a film that includes a heat-seal resin layer 13, for accommodating the battery element; wherein a melting point or a decomposition temperature of the separator is higher than a melting point of the heat-seal resin layer by 50° C. or more; and wherein, at least a part of the active material layer 31, 41 of the positive electrode or the negative electrode and the heat-seal resin layer are heat-sealed to each other at at least one surface of the upper surface and the lower surface of the battery element.

Abstract: It is an object of the present invention to provide a method for producing a secondary battery in which water in the outer package can be removed even when the secondary battery includes an electrolytic solution containing a halogen-containing compound.

Abstract: A packaged battery, an assembled battery, and a film-covered battery, which can prevent a dangerous state involving a high-pressure gas filled in the film-covered battery while ensuring a sealing reliability, are provided. The Packaged battery includes film-covered battery 1 including a battery element and exterior films forming a sealed space housing the battery element, and holding member 10 holding film-covered battery 1. The sealed space includes a housing section housing the battery element, and a pocket communicating with the housing section to expand when the pressure in the sealed space increases. The pocket includes a safety valve which activates when the pocket expands. Holding member 10 includes an opening and a cavity fitting the housing section therein. When the housing section is fitted into the cavity, at least part of the pocket and the safety valve protrude to the outside of the holding member from the opening.

Abstract: There is provided a laminated-type battery prevented from short-circuit between a positive electrode and a negative electrode, suppressed in a local increase in the thickness of the battery, and high in electric properties and the reliability.

Abstract: It is an object of the present invention to provide a method for producing a secondary battery in which water in the outer package can be removed even when the secondary battery includes an electrolytic solution containing a halogen-containing compound.

Abstract: The present invention provides a lithium ion secondary battery comprising: a positive electrode; a negative electrode comprising a negative electrode active material comprising at least one carbon material selected from the group consisting of a natural graphite, an artificial graphite, a non-graphitizable carbon and a graphitizable carbon; and an electrolyte solution comprising a specific cyclic disulfonate ester compound and an acid anhydride.

Abstract: A packaged battery, an assembled battery, and a film-covered battery, which can prevent a dangerous state involving a high-pressure gas filled in the film-covered battery while ensuring a sealing reliability, are provided. The Packaged battery includes film-covered battery 1 including a battery element and exterior films forming a sealed space housing the battery element, and holding member 10 holding film-covered battery 1. The sealed space includes a housing section housing the battery element, and a pocket communicating with the housing section to expand when the pressure in the sealed space increases. The pocket includes a safety valve which activates when the pocket expands. Holding member 10 includes an opening and a cavity fitting the housing section therein. When the housing section is fitted into the cavity, at least part of the pocket and the safety valve protrude to the outside of the holding member from the opening.

Abstract: A joint section where covering films 2a, 2b of film-covered battery 1 are heat-sealed together is formed with flat surface 6? having thickness t1 and groove 6 having thickness t2. Groove 6 serves to reduce the projection area of film-covered battery 1 by folding side 2c toward receiving section 2a1 with groove 6 serving as an edge, and groove 6 is made thinner than flat surface 6? by ?t=t1-t2. Therefore, the length of covering films 2a, 2b produced on outer side 6a is shortened as compared with the case of folding the portion that has thickness t1.

Abstract: A packaged battery, an assembled battery, and a film-covered battery, which can prevent a dangerous state involving a high-pressure gas filled in the film-covered battery while ensuring a sealing reliability, are provided. The Packaged battery includes film-covered battery 1 including a battery element and exterior films forming a sealed space housing the battery element, and holding member 10 holding film-covered battery 1. The sealed space includes a housing section housing the battery element, and a pocket communicating with the housing section to expand when the pressure in the sealed space increases. The pocket includes a safety valve which activates when the pocket expands. Holding member 10 includes an opening and a cavity fitting the housing section therein. When the housing section is fitted into the cavity, at least part of the pocket and the safety valve protrude to the outside of the holding member from the opening.

Abstract: A joint section where covering films 2a, 2b of film-covered battery 1 are heat-sealed together is formed with flat surface 6? having thickness t1 and groove 6 having thickness t2. Groove 6 serves to reduce the projection area of film-covered battery 1 by folding side 2c toward receiving section 2a1 with groove 6 serving as an edge, and groove 6 is made thinner than flat surface 6? by ?t=t1?t2. Therefore, the length of covering films 2a, 2b produced on outer side 6a is shortened as compared with the case of folding the portion that has thickness t1.

Abstract: A releasing pressure and a pressure releasing position, when enclosing films are expanded by gas produced at an abnormal time, are easily and positively configured. A film-enclosed battery (1) has a battery element (2) and two enclosing films (4, 5) for sealing the battery element (2). The enclosing films (4, 5) include heat-sealable resin layers and air-impermeable layers, and the heat-sealable resin layers and air-impermeable layers, and the heat-sealable resin layers that are face each other hold the battery element (2) and seal the battery element (2) when their peripheral edges are thermally fused. A cross-linking structure (8) formed by cross-linking heat-sealable resin layer is formed in one of the enclosing films (4, 5) so that a region in part of a heat-sealed area (6) has a position exposed to a battery element housing unit and another portion in contact with outside air.

Abstract: Battery element 2 is sandwiched between and surrounded by casing films 4, 5 each having a thermo-fusing resin layer, and is sealed by thermally fused region 6 formed by thermally fusing around the overall periphery. Cross-link structure portion 13 is formed in part of thermally fused region 6 by cross-linking casing film 5, and gas release chamber 12 is formed with its leading end positioned in cross-link structure portion 13. Gas release chamber 12 is a portion which is surrounded by thermally fused region 6 along its periphery, and in which casing films 4, 5 are not thermally fused. Tube 14 which is open at both ends is connected to gas release chamber 12, while sandwiched between casing films 4, 5, with its leading end positioned in gas release chamber 12.

Abstract: Battery element 2 is sandwiched between and surrounded by casing films 4, 5 each having a thermo-fusing resin layer, and is sealed by thermally fused region 6 formed by thermally fusing around the overall periphery. Cross-link structure portion 13 is formed in part of thermally fused region 6 by cross-linking casing film 5, and gas release chamber 12 is formed with its leading end positioned in cross-link structure portion 13. Gas release chamber 12 is a portion which is surrounded by thermally fused region 6 along its periphery, and in which casing films 4, 5 are not thermally fused. Tube 14 which is open at both ends is connected to gas release chamber 12, while sandwiched between casing films 4, 5, with its leading end positioned in gas release chamber 12.

Abstract: A film-packed battery includes a battery element and a packing film which houses the battery element and includes a main heat-sealed portion which is formed around the battery element, and a projecting heat-sealed portion which projects from the main heat-sealed portion toward the battery element, and a gas releasing portion formed in the projecting heat-sealed portion and the main heat-sealed portion adjacent to the projecting heat-sealed portion, wherein a distal end of the gas releasing portion reaches the projecting heat-sealed portion and the gas releasing portion connects external air with a heat-sealed interface of the packing film.

Abstract: A battery is fabricated on the basis of at least one of the following four concepts, i.e., lead terminals passing through a package not lower than the uppermost surface of an electrolyte cell, lead terminals projecting from a package in directions opposite to each other, a film package with a crushed portion expandable for accumulating gas and sheets of gas barrier sealant for keeping the boundaries between component parts of a package sealed; the seal is hardly broken so that the battery is durable and highly reliable.