Toyota Jidosha Kabushiki Kaisha

Prime Planet Energy & Solutions, Inc.

Nobuyuki Yamazaki

Yozo Uchida

Masanori Kitayoshi

Takashi Miura

Masaru Takagi

Yoshinori Shibata

Seiichi Sakuramoto

Keiji Kaita

Teruo Ishishita

Yukinari Tanabe

Tomohide Sumi

Tomohiko Ishida

Koji Oshita

Syoma Minami

Hirotoshi Kondo

Shintaro Miyata

A battery pack manufacturing method according to an aspect of the present disclosure includes stacking battery cells, pressurizing a battery cell group provided by stacking the battery cells in a stacking direction, measuring positions of cell terminals of the battery cells included in the pressurized battery cell group, finding a center straight line passing through a center of a distribution of the positions of the cell terminals, positioning a welding jig configured to decide a position where a bus bar is pressed against at least one of the cell terminals with reference to the center straight line, and welding the bus bar that is pressed against the at least one of the cell terminals, to the at least one of the cell terminals by the welding jig.

Battery pack and battery pack manufacturing method

A battery module includes a box shaped housing case that is open at an upper side, a battery stack in which plural battery cells are stacked along a horizontal direction, and that is housed inside the housing case, and plural types of shim that are made of different materials and that are disposed between the battery stack and the housing case in a state in which the battery stack is pressed along the stacking direction of the battery cells.

Battery module and battery module manufacturing method

A method of manufacturing a battery pack of the present disclosure stacks a plurality of battery cells such that one surfaces face the same direction and compresses the battery cells from both sides, inserts the compressed battery cells into the case such that the one surfaces are positioned on an open end side of the case, disposes a plurality of bus bars on the one surfaces of the battery cells so as to overlap the corresponding terminal, moves a pressurizing jig so as to press the bus bars toward a bottom surface of the case from a pressurization start position corresponding to a height position of the terminal of the battery cell farthest from the bottom surface, and bonds each of the plurality of bus bars to the corresponding terminal.

Method of manufacturing battery pack

A battery module, including: a housing case having a box-shaped and an open top; a battery stack including a stacked battery body in which plural battery cells are stacked along a horizontal direction, the battery stack being housed in the housing case; and a spacer member disposed between the battery stack and the housing case in a state in which the battery stack is pressed in a stacking direction of the plural battery cells, the spacer member being formed with an elongated cutout portion that extends from a lower end of the spacer member towards an upper side of the spacer member.

In a laser welding step, a laser beam is irradiated fin a thickness direction of an external terminal from a side of a front surface of a bus bar toward a space. This irradiation melts a separated portion of the external terminal, i.e., a portion located apart from the insulating part by the space between the insulating part and the separated portion in the thickness direction, and an opposed portion of the bus bar, i.e., a portion opposed to the space via the separated portion in the thickness direction, thereby forming a welded portion including the separated portion and the opposed portion melted together.

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.

Charge control device for in-vehicle battery

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.

Battery and manufacturing method of the same

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/A, 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 &#x3bc;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.

Positive-electrode plate for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method of producing non-aqueous electrolyte secondary battery

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&#x2264;Cf/Cp&#x2264;2.61 where Cf represents the number of fluorine atoms in the film, and Cp represents the number of phosphorus atoms in the film.

Lithium ion secondary battery having positive electrode active material particle with fluorine and phosphorous containing film, and method of manufacturing the same

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.

Positive electrode mixture paste, positive electrode, nonaqueous electrolyte secondary battery, and manufacturing method of nonaqueous electrolyte secondary battery

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.

Manufacturing method of nonaqueous electrolyte secondary battery

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 liquidtothat contain an active material onto a base materialto form two, three, four or more electrode layersto. The process of forming the electrode layerstoincludes a process of spraying suspension liquid onto the base materialhaving a predetermined surface temperature to form an electrode layerand a process of spraying suspension liquid onto the electrode layeror 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 layerwith respect to the base material

Method of manufacturing electrode of secondary battery by ESD method

The method for manufacturing a lithium ion secondary battery includes a binder coating step (), a mixture supplying step (), a magnetic field applying step (), and a convection generating step (). The binder coating step () is a step of coating a slurry-form binder () on a metal foil () (collector). The mixture supplying step () is a step of supplying a negative electrode mixture containing graphite so as to be superposed on the slurry-form binder () coated on the metal foil () in the binder coating step (). The magnetic field applying step () is a step of applying a magnetic field having magnetic lines of force pointing in the direction orthogonal to the metal foil (), to the negative electrode mixture () coated on the metal foil () in the mixture supplying step (). Further, the convection generating step () is a step of generating convection in the negative electrode mixture () by applying heat to the negative electrode mixture () to which a magnetic field has been applied in the magnetic field applying step ().

Method for manufacturing lithium ion secondary battery

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.

Method for producing electrode plate

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 materialand a binderis retained on a current collector. The formation of the compound material layer is carried out by a method including: a step of forming a binder solution layerby applying a binder solutioncontaining the first binderto the current collector; a step of depositing the binder solution layerand a compound material paste layeron the current collectorby applying the compound material pasteover the binder solution layer; and a step of obtaining an electrode in which the compound material layer is formed on the current collectorby drying both the binder solution layerand the compound material paste

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Toyota, Japan

Nobuyuki Yamazaki