Patents Assigned to Sanyo Electric Co.,Ltd.
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Publication number: 20230327214Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.Type: ApplicationFiled: June 14, 2023Publication date: October 12, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Atsushi Tsuji
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Publication number: 20230317941Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure contains a lithium transition metal composite oxide which is represented by general formula LiaNibCocAldXeOf (wherein 0.9?a?1.2; 0.88?b?0.96; 0?c?0.12; 0?d?0.12; 0?e?0.1; 1.9?f?2.1; (b+c+d)=1; and X represents at least one element that is selected from among Mn, Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Ta, Mo, W and B); and the lithium transition metal composite oxide has a pore volume of pores having a pore diameter of 0.3 ?m or less of from 6×10?4 mL/g to 50×10?4 mL/g, while having a particle fracture strength of 120 MPa or more at the volume average particle diameter.Type: ApplicationFiled: August 26, 2021Publication date: October 5, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Masanori Maekawa, Takayuki Ishikawa, Kaoru Nagata
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Patent number: 11777178Abstract: A battery module includes a plurality of battery cells each including an electrode terminal, and a bus bar that connects respective electrode terminals of adjacent battery cells in a state where the plurality of battery cells are stacked, wherein the bus bar includes a first bus bar having a first thickness, and a second bus bar having a second thickness larger than the first thickness, the first bus bar is connected to the respective electrode terminals of the adjacent battery cells, and the second bus bar is in non-contact with electrode terminals of the battery cells.Type: GrantFiled: November 16, 2018Date of Patent: October 3, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Takayuki Nobuhira, Takatoshi Kageyama
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Patent number: 11769936Abstract: 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: GrantFiled: December 24, 2019Date of Patent: September 26, 2023Assignee: SANYO Electric Co., Ltd.Inventor: Hiroshi Takabayashi
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Publication number: 20230299434Abstract: The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery configured to suppress the occurrence of internal short-circuiting in the vicinity of the inner side end of winding. This nonaqueous electrolyte secondary battery. according to one embodiment includes: an electrode body in which a positive electrode and a negative electrode are wound with a separator therebetween; a nonaqueous electrolyte; and an exterior body for housing the electrode body and the nonaqueous electrolyte. A negative electrode (12) includes a first negative electrode active material, and a second negative electrode active material, the second negative electrode active material exhibiting a greater expansion rate than the first negative electrode active material during charging.Type: ApplicationFiled: July 9, 2021Publication date: September 21, 2023Applicant: SANYO Electric Co., Ltd.Inventor: Masashi Aotani
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Publication number: 20230299397Abstract: A conductive member is disposed on a side of the sealing plate adjacent to an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector, which is electrically connected to positive electrode plates. A second insulating member is disposed between the deformation plate and the first positive-electrode current collector. Fixing projections and displacement prevention projections are provided on a surface of the second insulating member. The second insulating member is fixed to the first positive-electrode current collector such that the fixing projections are disposed in fixing holes in the first positive-electrode current collector.Type: ApplicationFiled: May 24, 2023Publication date: September 21, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
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Publication number: 20230299444Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery that can suppress damage to an electrode body in the vicinity of an end of an insulation tape due to repetition of charging and discharging. A non-aqueous electrolyte secondary battery is characterized by comprising: an exterior body; a wound-type electrode body which is housed in the exterior body and in which a positive electrode and a negative electrode are wound with a separator interposed therebetween; and an insulation tape stuck to the electrode body. The non-aqueous electrolyte secondary battery is also characterized in that the insulation tape has a base material layer and an adhesive layer that is provided on a main surface of the base material layer, and a side surface of the base material layer is non-vertically inclined with respect to the main surface.Type: ApplicationFiled: July 30, 2021Publication date: September 21, 2023Applicant: SANYO Electric Co., Ltd.Inventor: Yohei Furuta
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Publication number: 20230299427Abstract: A battery module includes a plurality of cylindrical batteries and lead plate connected to cylindrical batteries and electrically connecting the plurality of cylindrical batteries. Cylindrical battery includes can bottom valve including a thin-walled line ruptured and opening an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure. Lead plate includes double-supported arm arranged opposing a can bottom of cylindrical battery and coupled to lead plate at both ends at a position opposing can bottom valve, and gas permeation gap of exhaust gas ejected from the exhaust port on both sides of double-supported arm.Type: ApplicationFiled: September 17, 2021Publication date: September 21, 2023Applicants: SANYO Electric Co., Ltd., Panasonic Holdings CorporationInventors: Yuji Kishida, Tatsuya Hirano, Kazutoshi Kohira
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Patent number: 11757144Abstract: 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: GrantFiled: November 16, 2018Date of Patent: September 12, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Masakazu Naito, Naotake Yoshida
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Publication number: 20230282817Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35 r of the center.Type: ApplicationFiled: April 11, 2023Publication date: September 7, 2023Applicants: PANASONIC HOLDINGS CORPORATION, SANYO Electric Co., Ltd.Inventors: Miki Mizawa, Kaoru Nagata, Masanori Maekawa, Masahiro Kinoshita
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Patent number: 11742524Abstract: A positive electrode terminal is inserted into a current-collector through hole formed, in a positive electrode current collector and riveted in a spot-faced hole formed in the positive electrode current collector. A protrusion is formed on a bottom surface of the spot-faced hole so as to extend around the current-collector through hole, and a riveted portion of the positive electrode terminal covers the protrusion. The riveted portion of the positive electrode terminal is weld-connected to an edge of the spot-faced hole.Type: GrantFiled: January 3, 2020Date of Patent: August 29, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Yohei Muroya, Hiroshi Takabayashi, Tomokazu Yamanaka
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Publication number: 20230268557Abstract: The present disclosure provides a non-aqueous electrolytic solution secondary battery capable of suppressing increase of initial resistance when an isocyanate group-containing compound is added to a non-aqueous electrolytic solution. The non-aqueous electrolytic solution secondary battery according to one embodiment of the present disclosure has: a wound type electrode body in which a positive electrode and a negative electrode are wound with a separator interposed therebetween; and a battery case for housing the wound type electrode body and the non-aqueous electrolytic solution. The relation between a nitrogen element concentration A1 derived from an isocyanate group-containing compound in an outermost circumferential surface 2a of the wound type electrode body, and a nitrogen element concentration B derived from an isocyanate group-containing compound in an inner region located further in than the outermost circumferential surface of the wound type electrode body, satisfies A1>B.Type: ApplicationFiled: July 8, 2021Publication date: August 24, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Yasuyuki Takai, Atsushi Kaiduka
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Publication number: 20230261321Abstract: A separator for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure comprises a porous base material and a heat-resistant porous film that is arranged on at least one surface of the porous base material so as to face an electrode of a nonaqueous electrolyte secondary battery. The heat-resistant porous film contains a filler and a binder; and at least a part of a facing part A of the heat-resistant porous film, said facing part A facing the edge portion of the electrode, has a higher binder content than a facing part B of the heat-resistant porous film, said facing part B facing the central portion of the electrode.Type: ApplicationFiled: June 16, 2021Publication date: August 17, 2023Applicant: SANYO Electric Co., Ltd.Inventor: Nobuhiro Sakitani
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Publication number: 20230246178Abstract: An electrode for a non-aqueous electrolyte secondary battery, which is an example of an embodiment, has a belt-shaped negative electrode current collector and a negative electrode mixture layer formed on the surface of the negative electrode current collector. The negative electrode mixture layer contains a first Si-based active material and a second Si-based active material, each of which has a structure in which Si particles are dispersed in an oxide phase. The Si particle content in the first Si-based active material is higher than the Si particle content in the second Si-based active material, and, in the negative electrode mixture layer, the ratio of the mass of the first Si-based active material to the total mass of the first Si-based active material and the second Si-based active material is greater at the center than at the end in the width direction of the negative electrode current collector.Type: ApplicationFiled: June 16, 2021Publication date: August 3, 2023Applicant: SANYO Electric Co., Ltd.Inventor: Tsukasa Gejo
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Publication number: 20230246168Abstract: A nonaqueous electrolyte secondary battery provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. An electrode mixture layer of the positive electrode contains: first lithium metal composite oxide particles that are non-aggregated particles which have a volume-based median diameter of from 2 ?m to 10 ?m; and second lithium metal composite oxide particles that are secondary particles, in each of which primary particles having an average particle diameter of from 50 nm to 2 ?m aggregate, and which have a volume-based median diameter of from 10 ?m to 30 ?m. With a first region and the second region sequentially halved from the surface side of the positive electrode mixture layer, the content of the first lithium metal composite oxide particles in the first region is higher than the content of the first lithium metal composite oxide particles in the second region.Type: ApplicationFiled: August 19, 2021Publication date: August 3, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Nobuhiro Sakitani, Koki Morita, Shun Nomura, Hiroyuki Fujimoto
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Patent number: 11715847Abstract: Disclosed are a connection assembly for a battery module and a battery module. The connection assembly for a battery module has a housing body, a cover plate and an openable and closable door, wherein the housing body is used for supporting a plurality of components; the cover plate covers the housing body and used for covering the plurality of components on the housing body; the cover plate is provided with a second through-hole, and the second through-hole positionally corresponds to at least one of the plurality of components; the openable and closable door is movably mounted on the cover plate, and is positionally changeable between an open position and a closed position; wherein in the open position, the openable and closable door opens the second through-hole to expose the at least one of the plurality of components; and in the closed position, the openable and closable door shields at least part of the second through-hole to cover the at least one of the plurality of components on the body.Type: GrantFiled: March 26, 2020Date of Patent: August 1, 2023Assignees: Tyco Electronics Japan G.K, Tyco Electronics (Shanghai) Co., Ltd., Sanyo Electrics Co., Ltd.Inventors: Haifeng Liu, Litao Dong, Ziwei Li, Mitsuo Akiyama, Sadamichi Suso
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Patent number: 11715846Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.Type: GrantFiled: July 22, 2022Date of Patent: August 1, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Atsushi Tsuji
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Publication number: 20230238564Abstract: At one edge of a positive electrode plate in a winding axis direction of an electrode body, two positive electrode tabs per turn are provided to protrude from the edge. At the other edge of a negative electrode plate in the winding axis direction of the electrode body, two negative electrode tabs per turn are provided to protrude from the edge. The multiple positive electrode tabs provided to protrude from the positive electrode plate include multiple types of positive electrode tabs having different protrusion lengths and proximal end widths, and the multiple negative electrode tabs provided to protrude from the negative electrode plate include multiple types of negative electrode tabs having different protrusion lengths and base end widths.Type: ApplicationFiled: February 8, 2021Publication date: July 27, 2023Applicant: SANYO Electric Co., Ltd.Inventors: Takashi Hosokawa, Tomoyuki Yamada
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Patent number: 11699825Abstract: A conductive member is disposed on a side of the sealing plate adjacent to an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector, which is electrically connected to positive electrode plates. A second insulating member is disposed between the deformation plate and the first positive-electrode current collector. Fixing projections and displacement prevention projections are provided on a surface of the second insulating member. The second insulating member is fixed to the first positive-electrode current collector such that the fixing projections are disposed in fixing holes in the first positive-electrode current collector.Type: GrantFiled: January 23, 2018Date of Patent: July 11, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Ryoichi Wakimoto, Hirofumi Furukawa, Hiroyuki Yamada
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Patent number: 11699834Abstract: 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: GrantFiled: January 16, 2020Date of Patent: July 11, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Masayoshi Yoshida, Oose Okutani, Takahiro Nogami, Akira Takano