Abstract: An intermittently coated battery electrode manufacturing method capable of preventing a positional displacement from occurring between a first surface of a collector and a second surface opposed to the first surface. The intermittently coated battery electrode manufacturing method includes: forming, at a part of a strip-shaped collector where an active material is not coated, a front end indicator indicating a front end of the active material to be intermittently coated on the collector; performing coating of the active material on a first surface of the collector based on a detection signal of the front end indicator to form an intermittent coating layer; and starting coating of the intermittent coating layer on a second surface opposite to the first surface based on the detection signal of the same front end indicator as that used for forming the active material coating layer on the first surface.

Abstract: To provide a film-covered battery and a battery module having high resistance to external impact. A frame body is placed on a peripheral portion of a film-covered battery. The frame body has a protruding portion. The peripheral portion of film-covered body is supported by the protruding portion.

Abstract: A charging apparatus comprises a charge control unit. The charge control unit charges a secondary battery at a first current value until the voltage of the secondary battery reaches a predetermined first voltage value. The charge control unit, on detecting that the voltage has reached the first voltage value, performs control to charge the secondary battery at a second current value that is lower than the first current value, until a predetermined second voltage value is reached.

Abstract: In electrode (2) for an electrochemical device comprising current collector (9) and active material layer (10) made up from active material coated on current collector (9), active material layer (10) comprises lower active material layer (10a) which adheres to current collector (9) and upper active material layer (10b) formed on lower active material layer (10a). Lower active material layer (10a) is thinner than upper active material layer (10b). The termination portion of upper active material layer (10b) in the longitudinal direction of current collector (9) either coincides with the termination portion of lower active material layer (10a) or is positioned nearer side from the starting portion than the termination portion of lower active material layer (10a).

Abstract: Provided is a secondary battery with a high electric characteristic and reliability that prevents the short circuit between a positive electrode and a negative electrode by an insulating member and that prevents or reduces the volume increase and deformation of a battery electrode assembly. A secondary battery includes a battery electrode assembly in which positive electrode 1 and negative electrode 6 are alternately laminated while separator 20 is interposed therebetween. Positive electrode 1 and negative electrode 6 include current collectors 3, 8 and active materials 2, 7, each surface of current collectors 3, 8 is provided with an application portion and a non-application portion of active materials 2, 8, and the active materials 2, 7 include a thin portion whose thickness is small.

Abstract: Provided is a battery pack capable of more reliably preventing adverse effects from being externally exerted. MCU (26) measures, as index values pertaining to the deterioration state of battery unit (1), at least two or more from among: a capacity reduction rate that is the reduction rate of the full-charge capacity of battery unit (1) from an initial value; a cycle count representing the number of times that a cycle, in which battery unit (1) is charged until the cumulative value of charge quantities charged to battery unit (1) reaches a prescribed charge quantity, has been performed; the number of times that battery unit (1) has been charged; time elapsed from the manufacturing of battery unit (1); cell voltages that are the voltages of secondary battery cells 11; and determines whether battery unit (1) has reached its end of life by using the measured index values. Monitoring IC 25 suspends the use of battery unit (1) when battery unit (1) has reached its end of life.

Abstract: Electrode 6 for a secondary battery to be laminated with another type of electrode 1, with separator 20 interposed therebetween, to constitute a battery electrode assembly, is comprised of collector 8 and active material layer 7 formed on collector 8, and electrode 6 includes a coated part in which active material layer 7 is formed on collector 8 and an uncoated part in which active material layer 7 is not formed on collector 8. Active material layer 7 includes, in at least a part of the outer peripheral portion of the coated part, high density part 7a having a smaller thickness and a higher density than those of a portion other than the outer peripheral portion.

Abstract: Provided is a positive electrode mixture for a secondary battery, the positive electrode mixture allowing provision of a secondary battery that exhibits a high capacity maintenance rate in a charge-discharge cycle. The positive electrode mixture for a secondary battery comprises a positive electrode active material, a binder, and an organic acid, wherein the positive electrode active material comprises a lithium nickel complex oxide having a layered crystal structure, the binder comprises a vinylidene fluoride-based polymer, and when a solution prepared by suspending the positive electrode active material in pure water has a pH of A, and the content of the organic acid per 100 parts by mass of the positive electrode active material is B parts by mass, A and B satisfy the following expression (1).

Abstract: A method for manufacturing a lithium ion secondary battery, the lithium ion secondary battery including a positive electrode and a negative electrode disposed with a separator sandwiched therebetween and contained together with an electrolytic solution in an outer case including a flexible film, wherein the quantity of dissolved nitrogen in the electrolytic solution in injecting the electrolytic solution into the outer case is 100 ?g/mL or less.

Abstract: Thickener powder for a lithium-ion battery of the present invention is thickener powder that is used to thicken a water-based electrode slurry for a lithium-ion battery, the thickener powder includes a cellulose-based water-soluble polymer, and a content of a water-insoluble component in the thickener powder, which is calculated from Condition 1, is equal to or less than 1.0% by mass. (Condition 1: The thickener powder is dissolved in water, thereby obtaining a thickener aqueous solution having a concentration of 1.3% by mass. Next, the thickener aqueous solution is filtered using a filter having an average pore diameter of 1 ?m. Next, the water-insoluble component remaining on the filter is dried, and a mass of the water-insoluble component is measured. Next, the content of the water-insoluble component in the thickener powder is calculated.

Abstract: A positive electrode for a lithium-ion secondary battery of the present invention includes a collector for a positive electrode and a positive electrode active material layer provided on the collector for a positive electrode. The positive electrode active material layer includes a positive electrode active material, a conductive auxiliary agent, and a binder, the conductive auxiliary agent includes flake-shaped graphite having an average thickness of 0.5 ?m or less, and, when an average particle diameter of the positive electrode active material is represented by D50, the average particle diameter of the flake-shaped graphite is equal to or more than (3× active material D50/5) and equal to or less than (9× active material D50/10).

Abstract: The present invention provides a method of manufacturing an electrode sheet including a compression step of causing a band-shaped electrode sheet provided with an active substance layer which is an active substance forming portion between at least a pair of rotating columnar compression rolls, and pressing and compressing the electrode sheet by the pair of compression rolls, and a cutting step of cutting the electrode sheet undergoing the compression step parallel to a longitudinal direction of the electrode sheet. When the width of the active substance layer is assumed as a first width, the compression step compresses the electrode sheet using the compression rolls having a second width equal to or less than the first width.

Abstract: A battery pack (10) includes a plurality of battery cells (100) which are connected in series to each other, a voltage and current measurement unit (voltage and current measurement unit (200)), a temperature measurement unit (temperature measurement unit (300)), and a calculation unit (calculation unit (420)) provided in an arithmetic operation communication unit (400). The calculation unit (420) calculates a “first electric energy balance” of the battery cells (100) on the basis of voltages and currents, determines internal resistances of the battery cells (100) on the basis of the temperatures, and calculates a “second electric energy balance” of the internal resistances on the basis of currents and the internal resistances.

Abstract: To provide a lithium ion secondary battery that is less likely affected by vibration, shock, or the like. A stacked lithium ion secondary battery is characterized in that separators, which are stacked with positive and negative electrodes, are a flat bag or flat tube with at least one side of an outer periphery thereof intermittently heat-sealed; the heat-sealed side is provided with concave and convex portions made up of straight lines or curves or a combination of straight lines and curves; the outer periphery of the separator made with the concave and convex portions is positioned outside the outer periphery of the negative electrode along with the concave and convex portions; and the outer periphery of the negative electrode is positioned outside the outer periphery of the positive electrode housed in the bag-shape or tubular separator.

Abstract: Provided is a battery in which collector foil is unlikely to break. In a lithium-ion secondary battery, as for a distance from a connection section between a positive electrode tab and the positive electrode terminal to a boundary section between applying and non-applying sections of positive-electrode active material in a direction perpendicular to a stacking direction, compared with a reference positive electrode having the boundary section that is located farthest to the connection section by straight-line distance, a layer of a positive electrode that is stacked in such a way as to be farthest from the reference positive electrode has a smaller distance from a boundary of the applying and non-applying sections of the positive-electrode active material to a connection section with the positive electrode tab in a direction perpendicular to a stacking direction.

Abstract: An electrochemical device includes a storage element in which two types of electrodes are superposed on each other with a separator interposed therebetween and an outer container made of a flexible film that houses the storage element and an electrolyte solution, the two types of electrodes each including an active material-applied portion where an active material layer is formed on current collector 9, and an active material-non-applied portion, wherein each of the two types of electrodes is provided with an electrode terminal 7 and support tab 13, one end portion of electrode terminal 7 being superposed on the active material-non-applied portion of the electrode in the outer container, the other end portion of electrode terminal 7 extending to an outside of the outer container, support tab 13 sandwiching the active material-non-applied portion along with the one end portion of electrode terminal 7 in the outer container, and the active material-non-applied portion, electrode terminal 7, and support tab 13 a

Abstract: The present invention includes a battery cell, and a module case that contains the battery cell. The battery cell is formed in a flat shape in which a laminate current collector in which a positive current collector and a negative current collector are laminated or wound with a separator interposed therebetween, and an electrolytic solution are contained in a packaging body. The module case includes a deformation part swelling toward a principal surface side of the battery cell, at a position that faces the principal surface of the battery cell in the flat shape, and the deformation part is formed so as to be able to swell toward the outside of the module case when the battery cell expands.

Abstract: There is provided a lithium ion secondary battery comprising a positive electrode containing, as a positive electrode active material, a lithium nickel composite oxide having a layered rock salt structure, a negative electrode containing a negative electrode active material capable of occluding and releasing lithium ions, an electrolyte, and an outer package, wherein the lithium nickel composite oxide is represented by the composition formula LiNixM1-xO2 (x represents a numerical value of 0.75 to 1, and M represents at least one metal element occupying nickel sites other than Ni), and has a crystal phase having, in a full charge state, an interplanar spacing d(003) larger than an interplanar spacing d(003) in a complete discharge state.

Abstract: A battery pack (10) includes a plurality of battery cells (100) which are connected in series to each other, a voltage and current measurement unit (voltage and current measurement unit (200)), a temperature measurement unit (temperature measurement unit (300)), and a calculation unit (calculation unit (420)) provided in an arithmetic operation communication unit (400). The calculation unit (420) calculates a “first electric energy balance” of the battery cells (100) on the basis of voltages and currents, determines internal resistances of the battery cells (100) on the basis of the temperatures, and calculates a “second electric energy balance” of the internal resistances on the basis of currents and the internal resistances.

Abstract: A coating device has: a die head that is provided with a supply port into which a coating slurry is supplied, a manifold that stores the coating slurry, and a slit that dispenses the coating slurry; a supply pipe that is connected to the supply port of the die head; and a cover plate that is provided in the supply port or the supply pipe and that reduces the flow rate of the coating slurry at the center of a cross-section that is orthogonal to the direction in which the coating slurry in the supply port or the supply pipe flows into the die head.