Patents Assigned to Sanyo Electric Co.,Ltd.
  • Publication number: 20220149377
    Abstract: The purpose of the present disclosure is to provide a slurry for a non-aqueous electrolyte secondary cell capable of obtaining an electrode mixture layer showing excellent adhesion with a current collector. The slurry for a non-aqueous electrolyte secondary cell, which is one mode of the present disclosure, contains: an electrode mixture containing an electrode active material, lithium carbonate, and carboxymethylcellulose or a salt thereof; and water. The lithium carbonate content is in the range of 33 to 300 ppm with respect to the total mass of the electrode mixture.
    Type: Application
    Filed: February 21, 2020
    Publication date: May 12, 2022
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Yasunobu Iwami, Takaharu Morikawa, Toshiyuki Nakamori, Tomohiro Ichikawa
  • Publication number: 20220140308
    Abstract: Disclosed is a method for manufacturing a positive electrode plate, wherein even when a positive electrode mix layer is densely compressed, the positive electrode plate is prevented from being so greatly bent that wrinkles created in non-coated regions during transport, winding, or lamination develop into deep winkles or cracks, thus avoiding the inability to transport or wind the positive electrode plate. This manufacturing method can provide a positive electrode plate having a positive electrode mix layer formed on the surface thereof, wherein the filling density of the positive electrode mix layer is at least 3.4 g/cm3, and the warpage amount h of the positive electrode plate in the width direction perpendicular to the longitudinal direction satisfies 0.0?h?3.0 mm per 1 m in the longitudinal direction.
    Type: Application
    Filed: November 29, 2019
    Publication date: May 5, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Akira Nishida, Yoshifumi Magari, Atsutoshi Ako, Daisuke Ikeda
  • Publication number: 20220140390
    Abstract: A non-aqueous electrolyte secondary battery which is an example of an embodiment of the present invention includes an electrode body around which a positive electrode and a negative electrode are spirally wound via a separator, a non-aqueous electrolyte, and a bottomed cylindrical outer can that accommodates the electrode body and the non-aqueous electrolyte. The negative electrode has a negative electrode core and a negative electrode mixture layer that is provided on the surface of the negative electrode core. The electrode body has, on the outer peripheral surface, an exposed portion where the surface of the negative electrode core is exposed, and the exposed portion is in contact with the inner surface of the outer can. The non-aqueous electrolyte comprises 0.1 to 1.0 mass % of a diisocyanate compound.
    Type: Application
    Filed: February 18, 2020
    Publication date: May 5, 2022
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Kyohei Sakamoto, Masashi Takigawa, Shunsuke Nambuya
  • Publication number: 20220131131
    Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery having excellent low-temperature properties. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises a negative electrode having: a negative electrode current collector; and a negative electrode active material layer disposed on the negative electrode current collector, wherein the negative electrode active material layer contains graphite particles A and graphite particles B as a negative electrode active material. The internal porosity of graphite particles A is 8-20%, and the internal porosity of graphite particles B is 5% or less. When the negative electrode active material layer is bisected in the thickness direction into a negative electrode current collector-side first half region and an outer surface-side second half region, the amount of graphite particles A in the second half region is greater than in the first half region.
    Type: Application
    Filed: February 21, 2020
    Publication date: April 28, 2022
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Syunsuke Natsumeda, Takuya Shinomiya, Takamitsu Tashita, Fumikazu Mizukoshi
  • Patent number: 11316235
    Abstract: An electrode body including positive electrode plate and negative electrode plate includes a positive electrode tab portion at an end portion on the sealing plate side. The positive electrode plate is electrically connected to a positive electrode collector including a collector body portion and a collector connection. A pressure-sensitive current breaking mechanism includes a conductive member including an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion that is disposed on the electrode body side of the deformation plate and that is connected to the deformation plate. The collector connection is disposed between the current breaking mechanism and one of the large-area side walls of the prismatic outer package, and the positive electrode tab portion is connected to the collector connection.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 26, 2022
    Assignees: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Patent number: 11316202
    Abstract: A secondary battery having a suppressed decrease in capacity, even through rapid charging, includes: a positive electrode; a negative electrode including a negative electrode current collector and a negative electrode active material layer formed thereon containing a carbon material and silicon compounds; and an electrolyte solution containing nonaqueous solvents including 10 volume % or more of fluoroethylene carbonate. When: a surface of the negative electrode active material layer that faces the negative electrode current collector and the back side thereof are set as first and second surfaces, respectively; a thickness of the negative electrode active material layer is set as T; and regions from the first and the second surfaces to a depth of 0.5T are set as lower and upper layer portions, respectively, mass M1 of the silicon compounds in the lower layer portion is larger than mass M2 of the silicon compounds in the upper layer portion.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: April 26, 2022
    Assignees: SANYO Electric Co., Ltd., PANASONIC CORPORATION
    Inventors: Yukitoshi Uehara, Kouhei Tuduki, Yoshikazu Miyachi, Shinya Miyazaki
  • Publication number: 20220123296
    Abstract: The nonaqueous electrolyte secondary battery according to one embodiment includes a flat wound electrode body in which a positive plate and a negative plate are wound via a separator and characterized in that the positive plate has a positive core and a positive mixed material layer that is formed on both sides of the positive core, the positive mixed material layer includes a lithium metal composite oxide represented by general formula Li1+xMaO2+b (in the formula, x, a, and b satisfy the conditions x+a=1, ?0.2<x?0.2, and ?0.1?b?0.1, and M includes Ni and Co and at least one element selected from the group consisting of Mn and Al), and the positive plate has a flexibility index of 15 to 19. Such a positive plate is capable of having a high packing density while suppressing cracks in the positive mixed material layer and buckling of the positive plate and the negative plate.
    Type: Application
    Filed: November 27, 2019
    Publication date: April 21, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Atsutoshi Ako, Yoshifumi Magari, Kazuaki Tamura, Akira Nishida
  • Patent number: 11309609
    Abstract: A pair of end plates of a battery module are disposed respectively at end faces of a battery stack. Each of the end plates includes a first metal sheet, a second metal sheet, and a metal rod. The first metal sheet includes a plate part corresponding to a shape of each of the end faces of the battery stack, and a bent side piece provided at each of widthwise sides of the plate part. The second metal sheet includes a parallel plate part stacked on and fixed to the plate part of the first metal sheet, and a bending ridge that connects with each of sides of the parallel plate part and extends along widths of the end plates. A tubular reinforcement is defined on an inner side of the bending ridge. A metal rod is disposed in the tubular reinforcement and has ends connected to the bind bar.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 19, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kengo Ishibashi, Shinichi Mitsubori, Shinobu Terauchi
  • Publication number: 20220115756
    Abstract: A sealed battery, which is an exemplary embodiment, comprises a battery case including a bottomed cylindrical outer can and a sealing body that closes an opening of the outer can, a gasket disposed between the outer can and the sealing body, and an electrode body including an electrode and housed in the battery case. The sealing body includes a metal plate, and the metal plate has a thin portion formed in an annular shape, a valve portion having a convex shape inside the battery case, and an annular portion to which the electrode lead is connected. The gasket is provided with an elastically deformable portion that abuts against the inner surface of the valve portion and urges the valve portion to the outside of the battery case.
    Type: Application
    Filed: January 16, 2020
    Publication date: April 14, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Masayoshi Yoshida, Oose Okutani, Takahiro Nogami, Akira Takano
  • Publication number: 20220115698
    Abstract: A non-aqueous electrolyte secondary battery including a positive electrode core; a positive electrode plate having a positive electrode active material layer formed on the positive electrode core; a negative electrode plate; a flat wound electrode assembly in which the positive electrode plate and the negative electrode plate are wound with a separator therebetween; and a non-aqueous electrolyte, wherein the positive electrode active material is a manganese-containing lithium transition metal composite oxide, the BET specific surface area of the positive electrode active material is 2.0-3.0 m2/g, the total surface area of the positive electrode active material contained in the positive electrode active material layer is 70-90 m2, and the value of A/B is 0.03-0.09 (?mol/m2), where A (?mol) is the total amount of FSO3 contained in the non-aqueous electrolyte, and B (m2) is the total area of the positive electrode active material contained in the positive electrode active material layer.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 14, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yohei Tao, Ken Kaneko, Keisuke Minami, Toyoki Fujihara
  • Patent number: 11303141
    Abstract: A protection circuit for a battery includes a discharge FET, a control circuit, a first small-signal FET, and a second small-signal FET. The discharge FET connected in series to a battery interrupts an electric current. The control circuit switches on or off the discharge FET. The first small-signal FET connected in parallel between a gate (G) and a source (S) of the discharge FET is switched to an ON state, to set a gate voltage of the discharge FET to an OFF-state voltage. The second small-signal FET connected in parallel between G and S of the discharge FET detects a voltage between a drain (D) and S of the discharge FET. When the voltage between D and S of the discharge FET exceeds a preset voltage, the second small-signal FET is switched to an ON state to set the gate voltage of the discharge FET to the OFF-state voltage.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: April 12, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tetsuya Kawasaki, Hisashi Kameyama, Naoki Kawai, Takahiro Yamashita
  • Publication number: 20220109147
    Abstract: A positive electrode plate that has a positive electrode active material layer formed on a positive electrode core, wherein the positive electrode core has, on an edge side, a thick portion which has a thickness that is greater than the thickness of a portion of the positive electrode core that has the positive electrode active material layer formed on both sides, and the positive electrode plate has a first region that extends into the thick portion from the portion of the positive electrode core that has the positive electrode active material layer formed on both sides and a second region that is positioned outside the first region in the thick portion. The average maximum diameter of the metal crystal grains that compose the first region is smaller than those of the second region.
    Type: Application
    Filed: December 24, 2019
    Publication date: April 7, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kazuaki Tamura, Yoshifumi Magari, Atsutoshi Ako, Akira Nishida, Kentaro Tsukamoto, Tomoyuki Yamada
  • Publication number: 20220102805
    Abstract: A nonaqueous electrolyte secondary battery representing an embodiment of a sealed battery of the present invention includes a bottomed cylindrical exterior case, a sealing member, a cylindrical wound electrode assembly and an electrolyte. An open end of the exterior case is crimped together with the sealing member via an insulating gasket so as to form a seal. The sealing member includes a lid having a thin and fragile portion, an insulating ring, and a terminal plate having a thin and fragile portion. The terminal plate is electrically connected to a positive electrode current collector leading out from the cylindrical wound electrode assembly. The lid and the terminal plate are electrically connected within an opening of the insulating ring. The lid is disposed so as to expose an outer side of at least a portion of the lid opposed to the opening of the insulating ring directly to an outside environment.
    Type: Application
    Filed: December 9, 2021
    Publication date: March 31, 2022
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Kyosuke Miyata, Kazutoshi Kohira
  • Patent number: 11289734
    Abstract: A method for producing a secondary battery including an electrode body having a positive electrode plate and a negative electrode plate, a prismatic outer body having an opening and houses the electrode body, a sealing plate that seals the opening of the prismatic outer body, and a positive electrode external terminal that is electrically connected to the positive electrode plate and attached to the sealing plate. The method includes a fixation step of electrically connecting a first positive electrode current collector to a positive electrode external terminal and fixing the first positive electrode current collector to the sealing plate, a first connection step of weld-connecting a stack of a plurality of positive electrode tabs to the second positive electrode current collector, and a second connection step of weld-connecting the first positive electrode current collector to the second positive electrode current collector after the fixation step and the first connection step.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Atsushi Tsuji
  • Patent number: 11289773
    Abstract: A power supply device has; a battery stacked body where a plural sheets of battery cells each having a positive electrode terminal and a negative electrode terminal at one surface thereof are stacked; and a plurality of bus bars which connect the electrode terminals in the battery cells adjacently disposed. Each of the bus bars partially has a thin area whose thickness is thinner than a thickness of the other area, and an open window formed in the dun area, and opening a portion thereof. The thin area is formed in an oval shape elongated in the battery cell stacking direction, and the open window extends in a direction along the length of the oval shape. This configuration allows the thin area, above and below the length side of the oval shaped thin area, to be secured as a joining area for laser welding or the like.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Wataru Okada, Shinji Ota, Tetsuya Shiizaki
  • Patent number: 11289780
    Abstract: To provide a square secondary battery with a high reliability. A square secondary battery (20) including an electrode body (3) having a positive electrode plate and a negative electrode plate, a square outer package (1) that includes an opening and that houses the electrode body (3), and a sealing plate (2) that seals the opening of the square outer package (1), in which an inner side insulating member (12) serving as a first insulating member is disposed between the sealing plate (2) and a negative electrode collector member (8) and is fixed to the sealing plate (2), and in which a second insulating member (80) disposed between the sealing plate (2) and the electrode body (3) is connected to the inner side insulating member (12) serving as the first insulating member.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Publication number: 20220094024
    Abstract: A method of manufacturing a secondary battery including a joining step of clamping a negative electrode core body stacked part and a negative electrode current collector by a horn and an anvil, and in a state where the anvil is in contact with the negative electrode current collector, ultrasonically joining the negative electrode core body stacked part and the negative electrode current collector to form a joint part; and an oxidation treatment step of oxidizing a portion, in contact with the anvil, of the negative electrode current collector in the joining step.
    Type: Application
    Filed: December 24, 2019
    Publication date: March 24, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventor: Hiroshi Takabayashi
  • Publication number: 20220094020
    Abstract: A stacked secondary battery having an electrode body in which at least one positive and at least one negative plate are stacked, with a multilayered separator interposed, said separator including two porous layers of different materials; and an outer packaging case housing an insulating holder and an electrolyte together, said insulating holder housing the electrode body and being formed of overlapping sheets comprises an insulating material. The outer packaging case has a bottom surface, a plurality of side walls that are provided standing upright from the bottom surface, and an opening that is opposite from the bottom surface. In at least one separator, a section that is exposed from end surfaces of active material mixture layers and metal foil-comprising core bodies of the positive plate and the negative plate is in contact with the vicinity of a bottom line of a valley section that is formed from the sheet.
    Type: Application
    Filed: November 27, 2019
    Publication date: March 24, 2022
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Hideo Kasahara, Ryosuke Iwata, Ryoichi Wakimoto
  • Publication number: 20220093982
    Abstract: The purpose of the present invention is to shorten the manufacturing time in a method for manufacturing a non-aqueous-electrolyte secondary cell. In the method for manufacturing a non-aqueous-electrolyte secondary cell according to one embodiment of the present invention, during initial charging/discharging of a non-aqueous-electrolyte secondary cell comprising a negative electrode that includes a negative-electrode active material, a positive electrode that includes a Li—Ni composite oxide represented by the general formula LiaNixM(1-x)O2 (where 0<a?1.2, 0.6?x<1, and M is at least one element selected from Co, Mn, and Al) as a positive-electrode active material, and a non-aqueous electrolyte, charging is performed so that the positive electrode potential based on lithium is 4.1-4.25 V in an open circuit state after charging.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 24, 2022
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Shohei Mitsui, Natsuhiko Mukai, Junichi Sugaya
  • Patent number: 11283140
    Abstract: A negative electrode includes a first region formed of a first material and a second region formed of a second material having a different ionization tendency from the first material. The negative electrode terminal includes a flange that is disposed so as to face the outer surface of a sealing plate. A sealing plate side insulating member is disposed between the flange and the sealing plate. A boundary between the first region and the second region has an exposed part that is exposed to the outside, and the exposed part is positioned at an opposite corner on the periphery of the flange to the sealing plate.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: March 22, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Hiroshi Takabayashi, Yohei Muroya