Patents Assigned to Sanyo Electric Co.,Ltd.
  • Publication number: 20200106136
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a negative electrode mixture layer which contains a first region located in a flat part of an electrode body and second regions located in a pair of curved parts of the electrode body, the ratio (B/A) of the packing density (B) in each of the second regions to the packing density (A) in the first region being 0.75 or more and 0.95 or less. Further, in a section passing through the center in the axial direction of the electrode body and being perpendicular to the axial direction, the ratio (SB/SA) of the sectional area (SB) of the pair of curved parts to the sectional area (SA) of the flat part is 0.28 or more and 0.32 or less.
    Type: Application
    Filed: September 25, 2019
    Publication date: April 2, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Junichi Yogo, Masashi Muraoka, Keisuke Minami
  • Publication number: 20200106072
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a separator which contains a first region located in a flat part of an electrode body and second regions located in a pair of curved parts, the ratio (B/A) of the air permeability (B) in each of the second regions to the air permeability (A) in the first region being 0.5 or more and 0.9 or less. Further, in a section passing through the center in the axial direction of the electrode body and being perpendicular to the axial direction, the ratio (SB/SA) of the sectional area (SB) of the pair of curved parts to the sectional area (SA) of the flat part is 0.28 or more and 0.32 or less.
    Type: Application
    Filed: September 25, 2019
    Publication date: April 2, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Junichi Yogo, Masashi Muraoka, Keisuke Minami
  • Patent number: 10608233
    Abstract: A method of manufacturing a secondary battery including a negative electrode collector connected to a layered negative electrode core body exposed portion by welding, the method including a first step of disposing a core body connection of the negative electrode collector on an outer surface side of a layered negative electrode core body exposed portion so that a recess in the core body connection opposes the layered negative electrode core body exposed portion, a second step of pressing, with a pressing member, a portion in the core body connection where the recess is formed, forming a deformed portion, and contacting the deformed portion to the layered negative electrode core body exposed portion, and a third step of abutting an electrode for resistance welding against the negative electrode collector and resistance welding the negative electrode collector and the layered negative electrode core body exposed portion to each other.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: March 31, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tomokazu Yamanaka, Kuroudo Hayakawa
  • Publication number: 20200099027
    Abstract: A power supply device includes: a battery stack body that includes a plurality of secondary battery cells that are stacked; a pair of end plates disposed on both end surfaces of the battery stack body, respectively; and binding bars that are disposed on both the end surfaces of the battery stack body, respectively, and bind the pair of end plates. Each of the binding bars includes engaging steps that are opposite the pair of end plates, respectively. Each of the engaging steps extends in a direction intersecting with a stack direction of the battery stack body. Each of the pair of end plates includes engaging protrusions that are opposite the binding bars, respectively. The engaging protrusions engage with engaging steps. Consequently, rigidity that binds the battery stack body together is increased without changing a material and a thickness of the binding bars.
    Type: Application
    Filed: May 31, 2018
    Publication date: March 26, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kengo Ishibashi, Shinich Mitsubori, Shinobu Terauchi
  • Patent number: 10601029
    Abstract: It is an object to provide a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity is suppressed even when a positive electrode active material exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery contains a lithium transition metal oxide and is formed by mixing the lithium transition metal oxide, tungsten oxide, and a carbonate compound. The tungsten oxide is present on at least a part of a surface of the lithium transition metal oxide, and the mixed carbonate compound is present on a part of a surface of the tungsten oxide.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: March 24, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Kenji Kibune, Fumiharu Niina
  • Patent number: 10601014
    Abstract: A plurality of battery cells are connected by a busbar. Electrode terminals of the battery cells each include a protruding portion and a welding surface around the protruding portion. The busbar includes a welding plate portion being in surface-contact with the welding surface and having a cut-away portion for guiding the protruding portion, and an exposure gap that exposes the welding surface between the inner side of the cut-away portion and the protruding portion. The busbar is welded to the welding surface in a predetermined welding width (H) by both of a fillet weld part and a penetration welding portion such that the inner edge of the cut-away portion as the fillet weld part is welded to the welding surface, and the boundary between the busbar and the welding surface is welded by the penetration welding portion.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: March 24, 2020
    Assignee: SANYO ELECTRIC CO., LTD.
    Inventors: Wataru Okada, Yoshihiro Shiotsu, Tomomi Tanaka, Seiji Kumazawa
  • Patent number: 10601002
    Abstract: A cylindrical battery in an aspect of the present invention includes an electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; an electrolyte; a bottomed cylindrical outer can; and a sealing body crimped to an opening of the outer can via a gasket. The sealing body includes a valve body having an annular protrusion part, an insulating member disposed on an inner circumference of the protrusion part of the valve body and having a skirt portion, and a metal plate disposed on an inner circumference of the skirt portion of the insulating member and connected to a center portion of the valve body. The metal plate is crimped with the protrusion part of the valve body via the insulating member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: March 24, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Shuji Sugimoto, Kyosuke Miyata, Oose Okutani, Kazutoshi Kohira, Tomohiko Yokoyama, Shinya Geshi
  • Patent number: 10593922
    Abstract: A battery pack includes a plurality of prismatic secondary batteries with spacers each interposed therebetween. The prismatic secondary batteries each include a flat wound electrode body that is formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; a prismatic outer body that houses the wound electrode body; and a sealing plate that seals an opening of the flat wound electrode body. The wound electrode body has a wound positive electrode core-exposed portion at one end portion and a wound negative electrode core-exposed portion at the other end portion. A positive electrode current collector is joined to the positive electrode core-exposed portion to form a positive electrode-joined portion, and a negative electrode current collector is joined to the negative electrode core-exposed portion to form a negative electrode-joined portion.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: March 17, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tetsuya Okado, Keisuke Minami, Masashi Muraoka, Tomoharu Arai, Toyoki Fujihara
  • Publication number: 20200083881
    Abstract: In a control device that drives a semiconductor switch element, a first control switch is connected between a signal line and a source terminal or an emitter terminal of a semiconductor switch element. The signal line supplies a driving signal to a gate terminal or a base terminal of semiconductor switch element. The first control switch is controlled to an ON state when the semiconductor switch element is controlled to an OFF state. A second control switch is connected between the signal line and the source terminal or the emitter terminal in parallel with the first control switch. The second control switch is turned on when a potential of the source terminal or the emitter terminal becomes a negative potential.
    Type: Application
    Filed: November 22, 2017
    Publication date: March 12, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Takashi Imasato, Hideyuki Sasao
  • Patent number: 10587000
    Abstract: A non-aqueous electrolyte secondary battery has a positive electrode plate including a positive electrode active material mixture layer which contains as a positive electrode active material, a lithium transition metal composite oxide containing nickel; a negative electrode plate; a non-aqueous electrolyte including a lithium salt containing fluorine. In this non-aqueous electrolyte secondary battery, on a part of the positive electrode active material located as a surface of the positive electrode active material mixture layer, a first layer formed from nickel oxide and a second layer formed from nickel phosphate are provided in this order, the first layer has a thickness of 3 to 200 nm, and the second layer has a thickness of 1 to 50 nm.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: March 10, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Kazuya Hashimoto
  • Publication number: 20200076005
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes: a wound electrode assembly formed by spirally winding, via a separator, a positive electrode and a negative electrode in which a negative electrode mixture layer is formed on a negative electrode core, where the negative electrode core is exposed on an outermost surface, and a fastening tape is attached to fix a winding end of the negative electrode to the outermost surface; and a package that houses the wound electrode assembly and a nonaqueous electrolyte. The winding end of the negative electrode extends from a winding edge of the positive electrode in a winding direction; a winding end of the separator extends from a winding edge of the negative electrode in the winding direction; and the fastening tape is attached to extend across the winding end of the separator.
    Type: Application
    Filed: November 22, 2017
    Publication date: March 5, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Yukihiro Oki, Takaki Nakao
  • Publication number: 20200075958
    Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure includes a negative electrode including a negative electrode core and negative electrode mixture layers formed on both surfaces of the negative electrode core. Each of the negative electrode mixture layers contains a cellulose-based binder composed of at least one of carboxymethyl cellulose and a salt thereof. When each of the negative electrode mixture layers is divided in half, at the center in the thickness direction, into a first region near the negative electrode core and a second region far from the negative electrode core, the content of the cellulose-based binder present in the first region is 35% by mass or more and less than 50% by mass of the total mass of the cellulose-based binder contained in the entire of each of the negative electrode mixture layers.
    Type: Application
    Filed: August 26, 2019
    Publication date: March 5, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Naoki Uchida, Haruya Nakai, Ayumi Kochi
  • Publication number: 20200075923
    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: Application
    Filed: August 23, 2019
    Publication date: March 5, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Hiroshi Takabayashi, Yohei Muroya
  • Publication number: 20200076022
    Abstract: A battery pack includes a plurality of batteries that are chargeable and dischargeable, a battery holder that arranges the batteries at predetermined positions, and a bus bar that is a metal sheet fixed to electrode terminals of the batteries. The bus bar includes: a plurality of fixed terminals connected with the electrode terminals of the batteries; a base that connects the plurality of batteries with each other through the plurality of fixed terminals in series and/or in parallel; and fuse links that include ends connected with the fixed terminals, respectively, and roots that are connected with the base. The battery pack further includes a heat insulating member that tightly covers surfaces of the fuse links, and surfaces of the fixed terminals connected with the fuse links, respectively.
    Type: Application
    Filed: April 6, 2018
    Publication date: March 5, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Satoshi Kawakami, Masaya Nakano, Takao Takatsu
  • Publication number: 20200067094
    Abstract: An object of the present disclosure is to improve the discharge capacity of a nonaqueous electrolyte secondary battery using a fluoroethylene carbonate during use at low temperature. An exemplary nonaqueous electrolyte secondary battery according to an embodiment includes a positive electrode including a positive electrode current collector and a positive electrode mixture layer formed on the positive electrode current collector, a negative electrode including a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and a nonaqueous electrolyte containing a fluoroethylene carbonate. The negative electrode current collector contains a copper alloy containing iron.
    Type: Application
    Filed: November 16, 2017
    Publication date: February 27, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Takaki Nakao, Yukihiro Oki
  • Patent number: 10569958
    Abstract: A holder for conveyance of a cylindrical body includes a tubular portion having a hollow portion in which a cylindrical body is housed, and a protrusion having a base end connected to an inner wall surface of the tubular portion and a distal end formed as a free end. The protrusion has elasticity and flexibility, and the protrusion is disposed on an inner diameter side of an outer circumferential surface of the cylindrical body at an expected housing position such that a side surface of the distal end of the protrusion is allowed to come into contact with the outer circumferential surface while the protrusion is warped to an outer diameter side of the hollow portion.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: February 25, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Hiroaki Ichinose
  • Patent number: 10573871
    Abstract: A power supply device includes: a bus bar which connects the electrode terminals facing each other. The bus bar includes: a first connection portion which is connected to one of the electrode terminals; a second connection portion which is connected to another of the electrode terminals; a first rising portion which is coupled to the first connection portion through a first bent portion; a second rising portion which is coupled to the second connection portion through a second bent portion, and is disposed in an orientation of crossing the first rising portion; and a middle linking portion which is coupled to the first rising portion through a third bent portion facing the first bent portion, and the second rising portion through a fourth bent portion facing the second bent portion.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: February 25, 2020
    Assignee: SANYO ELECTRIC CO., LTD.
    Inventors: Toshihiko Bessho, Kenichi Imai
  • Publication number: 20200058914
    Abstract: This nonaqueous electrolyte secondary battery is provided with an electrode body that is obtained by alternately laminating a plurality of positive electrodes and a plurality of negative electrodes, with separators being interposed therebetween. Each separator is configured of a porous resin substrate and a porous heat-resistant layer that is formed on one surface of the resin substrate and has a larger surface roughness than the resin substrate. The electrode body comprises: bonding particles that bond a negative electrode and a heat-resistant layer with each other; and bonding particles that bond a positive electrode and a resin substrate with each other. The mass of the bonding particles per unit area in a first interface between the negative electrode and the heat-resistant layer is larger than the mass of the bonding particles per unit area in a second interface between the positive electrode and the resin substrate.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 20, 2020
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Hideo Kusada, Takafumi Tsukagoshi, Shinsuke Yoshida
  • Publication number: 20200052265
    Abstract: To provide a highly reliable rectangular secondary battery. A rectangular secondary battery (20) includes: an electrode body (3) that includes a positive electrode plate and a negative electrode plate; a rectangular casing (1) that includes an opening and that contains the electrode body (3); and a sealing plate (2) that seals the opening of the rectangular casing (1). The sealing plate (2) includes a gas discharge valve (17) that ruptures when the pressure inside the rectangular casing (1) has a predetermined value or more to discharge gas inside the rectangular casing (1) to outside the rectangular casing (1). A portion of a second negative electrode current collector (8b) is disposed, as a shielding member, at a location that is between the sealing plate (2) and the electrode body (3) and that faces the gas discharge valve (17).
    Type: Application
    Filed: October 20, 2017
    Publication date: February 13, 2020
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Ryoichi Wakimoto, Hiroyuki Yamada
  • Patent number: 10559825
    Abstract: Provided are a positive electrode active material capable of suppressing the reduction in capacity of a battery and the generation of gas during storage at high temperature in a charged state and a nonaqueous electrolyte secondary battery including the positive electrode active material. A positive electrode active material particle (20) includes a lithium transition metal oxide particle (21) containing a halogen atom and rare-earth compound particles (22) attached to the surface of the lithium transition metal oxide particle (21). The amount of the halogen atom present on the surface of the lithium transition metal oxide particle (21) is 5 mass percent or less of the total amount of the halogen atom contained in the lithium transition metal oxide particle (21). A rare-earth element making up the rare-earth compound particles (22) is one other than yttrium and scandium.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: February 11, 2020
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Hidekazu Tamai, Taizou Sunano