Patents Assigned to Sanyo Electric Co.,Ltd.
  • Patent number: 10985400
    Abstract: A method for manufacturing a nonaqueous electrolyte secondary battery which includes an electrode assembly, a housing with an opening and contains the electrode assembly, and a sealing member sealing the opening, the electrode assembly comprising a positive electrode and a negative electrode. The positive electrode includes a positive electrode active material, lithium carbonate, and lithium phosphate, the negative electrode comprising a negative electrode active material. The method includes placing the electrode assembly in the housing, and placing a nonaqueous electrolyte containing lithium fluorosulfonate in the housing.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: April 20, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Keisuke Minami, Yukari Kuratomi, Masao Inoue, Toyoki Fujihara, Naoya Nakanishi
  • Publication number: 20210111465
    Abstract: The present disclosure aims to suppress, in a winding type electrode body in which a negative electrode lead is bonded to a winding start side end of a negative electrode collector, electrode plate deformation in association with charge/discharge cycles. A nonaqueous electrolyte secondary battery according to one aspect of the present disclosure includes a winding type electrode body (14). A negative electrode (12) includes a negative electrode lead (20a) bonded to a winding start side end of a negative electrode collector and is wound at least one turn from a winding-direction inner end so as not to face a positive electrode (11) with a separator (13) interposed therebetween. The negative electrode (12) includes an insulating tape (40) adhered to the negative electrode collector so as to straddle a surface of the negative electrode lead (20a) in a winding direction.
    Type: Application
    Filed: March 20, 2018
    Publication date: April 15, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Atsushi Mizawa, Junichi Sugaya, Tomomichi Ueda, Masahiro Nakamura, Kei Kobayashi
  • Publication number: 20210104750
    Abstract: A negative electrode includes a negative electrode current collector and a negative electrode mixture layer disposed on the current collector, the negative electrode mixture layer including a carbon material and a Si-containing compound. The negative electrode mixture layer includes a lower layer (a first layer) disposed on the negative electrode current collector, and an upper layer (a second layer) disposed on the lower layer. The lower layer includes the carbon material, the Si-containing compound, and a first binder including a polyacrylic acid or a salt thereof. The upper layer includes the carbon material and a second binder. The mass of the lower layer is not less than 50 mass % and less than 90 mass % of the mass of the negative electrode mixture layer, and the mass of the upper layer is more than 10 mass % and not more than 50 mass % of the mass of the negative electrode mixture layer.
    Type: Application
    Filed: February 1, 2018
    Publication date: April 8, 2021
    Applicants: PANASONIC CORPORATION, SANYO Electric Co., Ltd.
    Inventors: Daisuke Ito, Yuta Matsuo, Kaori Ishikawa
  • Publication number: 20210104796
    Abstract: A rectangular secondary battery including a sealing plate. The scaling plate has a first fitting recess that is nearer than a positive electrode terminal attachment hole to a center of the sealing plate and a second fitting recess that is nearer than the positive electrode terminal attachment hole to an end portion of the sealing plate. The first fitting recess and the second fitting recess are disposed at positions that are displaced from the center of the sealing plate in a transversal direction of the sealing plate. A first fitting protrusion and a second fitting protrusion of a second outer insulator are respectively disposed in the first fitting recess and the second fitting recess.
    Type: Application
    Filed: March 20, 2018
    Publication date: April 8, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Ryoichi Wakimoto
  • Patent number: 10964923
    Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The prismatic secondary battery is arranged such that the sealing plate extends in the vertical direction during use of the prismatic secondary battery. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: March 30, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
  • Publication number: 20210091381
    Abstract: A nonaqueous electrolyte secondary battery using a silicon compound as a negative electrode active material, suppress deformation of a negative electrode. An embodiment includes a winding type electrode body in which a positive electrode and a negative electrode are spirally wound with at least one separator interposed therebetween. In a negative electrode mixture layer, a silicon compound is contained as a negative electrode active material. A winding-start side end of the negative electrode mixture layer extends to a winding-start end side of the electrode body past a winding-start side end of a positive electrode mixture layer. A length Y (mm) of a portion of the negative electrode mixture layer extending from the winding-start side end of the positive electrode mixture layer and a rate X (percent by mass) of the silicon compound with respect to the total mass of the negative electrode active material satisfy a relationship of Y?3X?15 (6?X?15).
    Type: Application
    Filed: December 6, 2018
    Publication date: March 25, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Mitsunori Miyanari, Syunsuke Natsumeda, Kei Kobayashi, Atsushi Mizawa
  • Publication number: 20210086661
    Abstract: Provided is a management device that manages a power storage module configured by connecting in series a plurality of parallel cell groups in which a plurality of cells are connected in parallel. In the management device, a voltage detection circuit detects a voltage of each of the plurality of parallel cell groups connected in series. A plurality of equalizing circuits are connected in parallel to the plurality of parallel cell groups, respectively. A controlling circuit controls the plurality of equalizing circuits based on the voltage detected by the voltage detection circuit and executes an equalizing process. The controlling circuit determines whether or not an abnormal cell is included in each of the parallel cell groups based on a voltage change of each of the parallel cell groups during discharging to the equalizing circuit or charging from the equalizing circuit.
    Type: Application
    Filed: November 15, 2018
    Publication date: March 25, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kimihiko Furukawa, Masato Nishikawa, Kenji Motoyoshi, Noriharu Kobayashi, Yoshitaka Sakiyama
  • Publication number: 20210091349
    Abstract: A power supply device disposes an end plate at each end of a battery stack in a stacked direction of the battery stack, and couples a binding bar to the end plate, so as to fix battery cells. The binding bar includes a plate-shaped bar that extends in the stacked direction of the battery stack, and an engagement block that is fixed to the plate-shaped bar and protrudes as a face opposing an outer peripheral face of the end plate. The End plate includes a fitting part to which the engagement block is guided, and a stopper. The fitting part is disposed on the outer peripheral face of the end plate. The stopper is disposed closer to the battery stack with respect to the fitting part, and abuts the engagement block.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 25, 2021
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Shinobu Terauchi, Tetsuji Omura
  • Publication number: 20210091428
    Abstract: A plurality of battery cells each having a prismatic shape, a fixing member that fixes the plurality of battery cells in a stacked state, and a thermal insulation sheet that is sandwiched between stacking surfaces of battery cells and thermally insulates the adjacent battery cells, wherein thermal insulation sheet is an inorganic fiber sheet in which inorganic fibers are aggregated in a three-dimensionally non-directional manner and fine voids are provided between the inorganic fibers.
    Type: Application
    Filed: November 16, 2018
    Publication date: March 25, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masakazu Naito, Naotake Yoshida
  • Patent number: 10957883
    Abstract: A prismatic secondary battery includes an electrode body including a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a sealing plate that seals an opening of the prismatic exterior body, and a negative terminal electrically connected to the negative-electrode sheet. The positive-electrode sheet is electrically connected to the sealing plate. The sealing plate has a recessed portion on an outer surface and a terminal insertion hole formed in the recessed portion. The negative terminal is inserted in the terminal insertion hole. An outer insulating member is disposed between the negative terminal and the sealing plate. The sealing plate has a first groove extending to an end of the recessed portion in the longitudinal direction of the sealing plate.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: March 23, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yohei Muroya, Kazuki Takeno, Mitsuhiro Okada
  • Publication number: 20210083331
    Abstract: A plurality of power source circuits is each configured to be able to selectively charge any one of a plurality of cells included in each of series cell groups by using a voltage across each of series cell groups. The plurality of discharge circuits are each configured to be able to discharge a capacity stored in each of series cell groups. A controlling circuit equalizes the states of the plurality of cells included in each of the series cell groups by using the plurality of power source circuits. The controlling circuit equalizes the states of the plurality of series cell groups by using the plurality of discharge circuits.
    Type: Application
    Filed: November 15, 2018
    Publication date: March 18, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Tomonori Kunimitsu
  • Publication number: 20210083270
    Abstract: The positive electrode active material with lithium composite oxide A containing W and Ni and W-free lithium composite oxide B containing Ni. Regarding the lithium composite oxide A, the proportion of Ni relative to the total moles of metal elements except for lithium is 30 to 60 mol %, 50% particle size D50 is 2 to 6 ?m, 10% particle size D10 is 1.0 ?m or more, and 90% particle size D90 is 6.8 ?m or less. Regarding the lithium composite oxide B, the proportion of Ni relative to the total moles of metal elements except for lithium is 50 to 95 mol %, 50% particle size D50 is 10 to 22 ?m, 10% particle size D10 is 7.0 ?m or more, and 90% particle size D90 is 22.5 ?m or less. The mass ratio of the lithium composite oxide B to the lithium composite oxide A is 1:1 to 5.7:1.
    Type: Application
    Filed: December 14, 2018
    Publication date: March 18, 2021
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Hidekazu Hiratsuka, Takuo Yoneda
  • Patent number: 10950904
    Abstract: A battery system having: a series unit in which battery units are connected in series; heat exchangers thermally coupled with the battery units and internally circulating the coolant; and an outer case in which the series units and the heat exchangers are accommodated. The battery unit has battery cells stacked together, a plus output terminal and a minus output terminal at both ends thereof. The battery unit disposed at an end of the plus output terminal side of the series unit is disposed at an inclined posture where the end of the plus output terminal side is away from the base plate of the outer case. The battery unit disposed at an end of the minus output terminal side of the series unit, is disposed at an inclined posture where the end of the minus output terminal side is away from the base plate of the outer case.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: March 16, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kenji Motoyoshi, Masato Nishikawa
  • Publication number: 20210066697
    Abstract: A cylindrical battery includes a bottom-closed cylindrical exterior package can which receives an electrode body. A lead connected to one of a positive electrode and a negative electrode of the electrode body is extended from the electrode body and is welded to a bottom portion of the exterior package can. When the bottom portion is viewed from the outside of the exterior package can, at least a part of the welding portion between the lead and the bottom portion formed by a molten mark is formed outside of a concentric circle of the bottom portion which has a diameter equivalent to the width of the lead.
    Type: Application
    Filed: February 18, 2019
    Publication date: March 4, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryunosuke Yokoo, Kazumichi Shimizu
  • Patent number: 10938057
    Abstract: A method of manufacturing a secondary battery including an electrode body including a positive electrode plate and a negative electrode plate, an outer package including an opening and housing the electrode body, a sealing plate sealing the opening, a negative electrode terminal attached to the sealing plate, a negative electrode tab portion provided in the negative electrode plate, and a negative electrode collector electrically connecting the negative electrode tab portion and the negative electrode terminal to each other, the method including welding a flange portion of the negative electrode terminal and the negative electrode collector together by projecting an energy ray, the negative electrode collector includes, before the welding, a rough surface portion, and in the welding, the flange portion of the negative electrode terminal and the negative electrode collector are connected by welding by projecting an energy ray onto the rough surface portion.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: March 2, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Naoya Tada
  • Publication number: 20210057690
    Abstract: A battery pack includes a plurality of secondary battery cells, a battery holder, a circuit substrate, and an outer case, in which the battery holder is divided into a plurality of divided holders, each of the divided holders forms a fitting structure for fitting the divided holders to each other at an interface for joining the divided holders together, the battery holder forms a substrate holding area that holds a circuit substrate with the circuit substrate surrounded by side walls in a state where the divided holders are coupled to each other by the fitting structure, a joint interface where the divided holders are fitted to each other by the fitting structure of the divided holders is exposed in the substrate holding area, and a surface of the circuit substrate is covered with a potting resin in the substrate holding area.
    Type: Application
    Filed: February 8, 2019
    Publication date: February 25, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kazuaki Fukutome, Hiroshi Arikawa
  • Publication number: 20210050588
    Abstract: A nonaqueous electrolyte secondary battery (10) in an example embodiment includes a positive electrode (11) having a lithium metal composite oxide, and a negative electrode (12) having graphite. The lithium metal composite oxide includes first composite oxide particles which are secondary particles formed by aggregation of primary particles having an average particle size of 50 nm to 5 ?m, and second composite oxide particles which are non-aggregated particles having an average particle size of 2 ?m to 20 ?m. The positive electrode (11) has lower initial charge/discharge efficiency than the initial charge/discharge efficiency of the negative electrode (12).
    Type: Application
    Filed: February 1, 2019
    Publication date: February 18, 2021
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Yukihiro Oki, Shun Nomura, Atsushi Ogata
  • Publication number: 20210050582
    Abstract: There is provided a battery system including parallel-connected bus bars each connecting the plurality of prismatic battery cells in parallel, and a safety mechanism configured to be capable of interrupting a current path of prismatic battery cells connected in parallel by the parallel-connected bus bars, where the sealing plate of one of the prismatic battery cells convexly deforms due to a rise in an internal pressure of this prismatic battery cell when an abnormality occurs, the sealing plate that has convexly deformed comes into contact with the parallel-connected bus bars to form external short circuitry between the electrode terminals that are positive and negative of one prismatic battery cell connected in parallel to the prismatic battery cell with the abnormality, and external short circuitry activates the safety mechanism that interrupts a current flowing into the prismatic battery cell with the abnormality.
    Type: Application
    Filed: November 15, 2018
    Publication date: February 18, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Naotake Yoshida, Kazuhiro Harazuka, Nobuo Iwatsuki, Shinji Ota
  • Patent number: 10923934
    Abstract: A first temperature detector detects a temperature in a high-temperature area and a temperature in a low-temperature area of a power storage unit based on an output value of a first temperature detection element provided at a first position in the high-temperature area and an output value of a temperature detection element provided at a predetermined position in the low-temperature area. A main controller controls charge and discharge based on the temperatures by the first temperature detector. A second temperature detector detects a temperature in the high-temperature area based on an output value of a second temperature detection element provided at a second position in the high-temperature area. A sub-controller controls charge and discharge based on the temperature detected by the second temperature detector during occurrence of an abnormality in the main controller.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: February 16, 2021
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Masayuki Yoshinaga
  • Publication number: 20210043915
    Abstract: The purpose of the present disclosure is to provide a secondary battery in which a current interruption function of an electrode tap can be enhanced during an external short circuit, and a temperature rise in the battery can be effectively suppressed. A secondary battery according to one embodiment of the present disclosure is provided with: an electrode assembly having a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; a sealing assembly constituting a positive terminal; a case body constituting a negative terminal; a positive electrode tap connecting the positive electrode and the sealing assembly; and a negative electrode tap connecting the negative electrode and the case body, wherein the positive electrode has a fuse part which has a relatively small cross-sectional area in the positive electrode, and the fuse part of the positive electrode is metallurgically bonded to the sealing assembly.
    Type: Application
    Filed: February 13, 2019
    Publication date: February 11, 2021
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Norie Mantoku, Oose Okutani, Kyosuke Miyata