Abstract: A lithium ion secondary battery includes: a positive electrode sheet that includes a positive electrode active material layer containing a positive electrode active material particle; a negative electrode sheet; and a nonaqueous electrolytic solution that contains a compound containing fluorine, wherein a surface of the positive electrode active material particle includes a film containing fluorine and phosphorus, and a ratio Cf/Cp satisfies 1.89?Cf/Cp?2.61 where Cf represents the number of fluorine atoms in the film, and Cp represents the number of phosphorus atoms in the film.

Abstract: In a positive electrode mixture paste manufacturing step, a positive electrode mixture paste is manufactured by further mixing an acid compound, in addition to a positive-electrode active material, a conductive material, a binder, lithium phosphate, and a solvent.

Abstract: A battery includes at least an electrode group including a positive electrode, a separator, a negative electrode and a protection layer. The separator is interposed between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector, a positive electrode mixture layer, and a positive electrode tab. The positive electrode mixture layer is disposed on a surface of the positive electrode current collector. The positive electrode tab is electrically connected to the positive electrode current collector. The protection layer covers a surface of the positive electrode tab. A volume resistivity of the protection layer is within a range of one to 100 times a volume resistivity of the positive electrode mixture layer.

Abstract: A charge control device for an in-vehicle battery includes a control unit that obtains a neglect resistance increase rate as a reversible resistance component based on an SOC of the battery and a temperature of the battery when the battery is not charged/discharged, and that obtains a permissible charge current value to the battery based on the obtained neglect resistance increase rate.

Abstract: A manufacturing method of a nonaqueous electrolyte secondary battery includes: a lithium phosphate dispersion manufacturing step of manufacturing a lithium phosphate dispersion by dispersing lithium phosphate in a solvent without adding a positive-electrode active material; a positive electrode mixture paste manufacturing step of manufacturing a positive electrode mixture paste by mixing the lithium phosphate dispersion with a positive electrode material including the positive-electrode active material; and a step of manufacturing a positive electrode including a positive electrode mixture layer on a surface of a current collector member by applying the positive electrode mixture paste on the surface of the current collector member and drying the positive electrode mixture paste.

Abstract: A battery module includes a plurality of column-shaped batteries 12, a battery holder 14 having a plurality of retention holes 15 and being configured to hold the plurality of column-shaped batteries 12 in an upright position, and an adhesive placed between an inner circumferential surface of each of the retention holes 15 and an outer circumferential surface of a corresponding one of the column-shaped batteries 12. At least one of the inner circumferential surface of the retention hole 15 and the outer circumferential surface of the column-shaped battery 12 has an uneven surface 70 having a surface height varying in accordance with at least the position in the axial direction.

Abstract: The present invention aims to provide a multi-layer electrode. A method of manufacturing the multi-layer electrode according to the present invention is used in a secondary battery. The manufacturing method includes a process of sequentially spraying suspension liquid 51 to 54 that contain an active material onto a base material 50 to form two, three, four or more electrode layers 56 to 59. The process of forming the electrode layers 56 to 59 includes a process of spraying suspension liquid onto the base material 50 having a predetermined surface temperature to form an electrode layer 56 and a process of spraying suspension liquid onto the electrode layer 56 or another electrode layer having a surface temperature different from the predetermined surface temperature to form an electrode layer that is more distal than the electrode layer 56 with respect to the base material 50.

Abstract: The method for manufacturing a lithium ion secondary battery includes a binder coating step (18), a mixture supplying step (20), a magnetic field applying step (22), and a convection generating step (24). The binder coating step (18) is a step of coating a slurry-form binder (18a) on a metal foil (12a) (collector). The mixture supplying step (20) is a step of supplying a negative electrode mixture containing graphite so as to be superposed on the slurry-form binder (18a) coated on the metal foil (12a) in the binder coating step (18). The magnetic field applying step (22) is a step of applying a magnetic field having magnetic lines of force pointing in the direction orthogonal to the metal foil (12a), to the negative electrode mixture (20a) coated on the metal foil (12a) in the mixture supplying step (20).

Abstract: In a positive-electrode active material layer of a positive-electrode plate for a non-aqueous electrolyte secondary battery, a dispersion index value C determined from a small-size-particle ratio A and a coefficient B of variation and expressed by an expression, C=B/A3, is 0.8 or less. The small-size-particle ratio A is a ratio of the number of small-size-particle-containing spots where a detected intensity of phosphorus is equal to or lower than a detected density of trilithium phosphate having a particle size of 1 ?m or less, to the number of phosphorus-containing spots among the analyzed spots. The coefficient B of variation is a ratio of a standard deviation of segmented-region accumulated values to an arithmetic mean of the segmented-region accumulated values each of which is the sum of detected intensities in the phosphorus-containing spots in a corresponding one of the segmented regions obtained through segmentation of the analyzed region.

Abstract: A rotary screen plate 100 that is a cylindrical body including a plurality of injection holes 11 through which electrode mixture paste is injected to a collector from inside the cylindrical body in an outer peripheral surface of the cylindrical body. The rotary screen plate includes a projection 12 that projects outwardly of the cylindrical body further than another part of the outer peripheral surface 1 on the outer peripheral surface 1 of the cylindrical body. The projection 12 creates a moderate gap between the collector and the outer peripheral surface 1, and thus even the electrode mixture paste with a high content of powder and high viscosity can sufficiently spread over the part of the outer peripheral surface 1 of the rotary screen plate 100 other than the injection holes 11. The electrode mixture paste can be applied to the collector with a uniform film thickness.

Abstract: The present invention aims to provide a multi-layer electrode. A method of manufacturing the multi-layer electrode according to the present invention is used in a secondary battery. The manufacturing method includes a process of sequentially spraying suspension liquid 51 to 54 that contain an active material onto a base material 50 to form two, three, four or more electrode layers 56 to 59. The process of forming the electrode layers 56 to 59 includes a process of spraying suspension liquid onto the base material 50 having a predetermined surface temperature to form an electrode layer 56 and a process of spraying suspension liquid onto the electrode layer 56 or another electrode layer having a surface temperature different from the predetermined surface temperature to form an electrode layer that is more distal than the electrode layer 56 with respect to the base material 50.

Abstract: A lithium ion secondary battery includes: a positive electrode sheet that includes a positive electrode active material layer containing a positive electrode active material particle; a negative electrode sheet; and a nonaqueous electrolytic solution that contains a compound containing fluorine, wherein a surface of the positive electrode active material particle includes a film containing fluorine and phosphorus, and a ratio Cf/Cp satisfies 1.89?Cf/Cp?2.61 where Cf represents the number of fluorine atoms in the film, and Cp represents the number of phosphorus atoms in the film.

Abstract: A manufacturing method of a nonaqueous electrolyte secondary battery includes: a lithium phosphate dispersion manufacturing step of manufacturing a lithium phosphate dispersion by dispersing lithium phosphate in a solvent without adding a positive-electrode active material; a positive electrode mixture paste manufacturing step of manufacturing a positive electrode mixture paste by mixing the lithium phosphate dispersion with a positive electrode material including the positive-electrode active material; and a step of manufacturing a positive electrode including a positive electrode mixture layer on a surface of a current collector member by applying the positive electrode mixture paste on the surface of the current collector member and drying the positive electrode mixture paste.

Abstract: In a positive electrode mixture paste manufacturing step, a positive electrode mixture paste is manufactured by further mixing an acid compound, in addition to a positive-electrode active material, a conductive material, a binder, lithium phosphate, and a solvent.

Abstract: A coating device is arranged to a strip-shaped base sheet with coating material by holding the coating material on the surface of a coating rod and bringing the base sheet into contact with the coating material held on the coating rod, while conveying the base sheet in the longitudinal direction. The coating rod has a water-repellent section, in which the entire circumferential surface of a part of the rod in the axial direction is coated with a water-repellent material that repels the coating material, and a non-water-repellent section that is not coated with the water-repellent material and arranged adjacent to the water-repellent section. Consequently, even if the base sheet is brought into contact with the coating rod, the base sheet can be adequately provided with an uncoated portion in a part in the width direction since the coating material is repelled in the water-repellent section.

Abstract: According to the present invention, provided is a method for producing a battery electrode employing a configuration in which a compound material layer containing an active material 22 and a binder 54 is retained on a current collector 10. The formation of the compound material layer is carried out by a method including: a step of forming a binder solution layer 56 by applying a binder solution 50 containing the first binder 54 to the current collector 10; a step of depositing the binder solution layer 56 and a compound material paste layer 46 on the current collector 10 by applying the compound material paste 40 over the binder solution layer 56; and a step of obtaining an electrode in which the compound material layer is formed on the current collector 10 by drying both the binder solution layer 56 and the compound material paste 40.

Abstract: The present invention provides a method for manufacturing a battery electrode. This method comprises the steps of applying a binder solution 50 that contains a binder 54 and is adjusted so that the contact angle of the binder solution 50 with the surface of a current collector 10 is 73° or less, to form a binder solution layer 56; applying a mixed material paste 40 containing an active material 22 on top of the binder solution layer 56, to deposit both the binder solution layer 56 and a mixed material paste layer 46 on the current collector 10; and obtaining an electrode 30 in which a mixed material layer 20 is formed on the current collector 10, by drying the deposited binder solution layer 56 and mixed material paste layer 46 together.

Abstract: A manufacturing method of an application roller that applies a coating solution onto a surface of a substrate, wherein the application roller includes a roller body that includes a large diameter portion and small diameter portions coaxially extended from both ends of the large diameter portion, the manufacturing method includes: overlaying a resin layer on at least an outer periphery of each of the small diameter portions; forming a masking portion on the outer periphery of each of the small diameter portions by processing an outer periphery of the resin layer; and forming an application groove portion on an outer periphery of the large diameter portion.

Abstract: A method is provided for producing a battery electrode having a configuration in which a compound material layer containing an active material and a binder is retained on a current collector. This method includes forming protrusions composed of a polymer on a surface of the current collector, forming a binder solution layer by coating a binder solution containing the binder over the polymer protrusions onto the current collector, depositing the binder solution layer and a compound material paste layer on the current collector by applying a compound material paste containing the active material over the binder solution layer, and obtaining an electrode in which the compound material layer is formed on the current collector by drying both the deposited binder solution layer and compound material paste layer.

Abstract: The method for manufacturing a lithium ion secondary battery includes a binder coating step (18), a mixture supplying step (20), a magnetic field applying step (22), and a convection generating step (24). The binder coating step (18) is a step of coating a slurry-form binder (18a) on a metal foil (12a) (collector). The mixture supplying step (20) is a step of supplying a negative electrode mixture containing graphite so as to be superposed on the slurry-form binder (18a) coated on the metal foil (12a) in the binder coating step (18). The magnetic field applying step (22) is a step of applying a magnetic field having magnetic lines of force pointing in the direction orthogonal to the metal foil (12a), to the negative electrode mixture (20a) coated on the metal foil (12a) in the mixture supplying step (20).