公开(公告)号：US20190319271A1

公开(公告)日：2019-10-17

申请号：US16352352

申请日：2019-03-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO ,  Yoshinari MAKIMURA

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/525

Abstract: A positive electrode active material contains at least: fluorine in an amount not lower than 0.08 mass %; carbon in an amount not lower than 0.02 mass %; and lithium-metal composite oxide particles making up the remainder. The lithium-metal composite oxide particles contain nickel in an amount not lower than 60 mol % of the total amount of metallic elements. At least a partial amount of each of the fluorine and the carbon is present on surfaces of the lithium-metal composite oxide particles.

公开(公告)号：US20250149665A1

公开(公告)日：2025-05-08

申请号：US18922421

申请日：2024-10-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO

IPC: H01M10/52 ,  H01M10/0562 ,  H01M10/48 ,  H01M10/615 ,  H01M50/367

Abstract: The present disclosure provides a battery pack in which hydrogen sulfide that may be generated from a battery containing a sulfide solid electrolyte can be effectively removed, and a method for removing such hydrogen sulfide in a battery pack. A battery pack 1 of the present disclosure comprises an outer container 10, batteries 20, which are housed in the outer container 10 and each contain a sulfide solid electrolyte, and a hydrogen sulfide absorbent 40, which is housed in the outer container 10, or arranged in a flow path 30 communicating with the inside of the outer container 10. The hydrogen sulfide absorbent is selected from the group consisting of zinc oxide, limestone, dolomite, and a combination thereof. The method for removing hydrogen sulfide in a battery pack according to the present disclosure comprises removing hydrogen sulfide using a hydrogen sulfide absorbent in a battery pack of the present disclosure.

公开(公告)号：US20220336850A1

公开(公告)日：2022-10-20

申请号：US17659114

申请日：2022-04-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Panasonic Holdings Corporation

Inventor： Yuhi YAMANO ,  Kunimitsu YAMAMOTO ,  Yuki ARAI ,  Takamasa OHTOMO ,  Yasunari SUGITA ,  Tatsuya OSHIMA

IPC: H01M10/0562 ,  H01M10/42 ,  H01M4/134

Abstract: A main object of the present disclosure is to provide a battery superior in safety against heating. The present disclosure achieves the object by providing a battery comprising cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector, in this order along a thickness direction, and the anode current collector includes a coating layer including an oxide active material, on a surface of the anode active material layer side, the solid electrolyte layer includes a first solid electrolyte layer, and a second solid electrolyte layer placed between the first solid electrolyte layer and the anode active material layer, the first solid electrolyte layer includes a halide solid electrolyte, and the second solid electrolyte layer includes a sulfide solid electrolyte.

公开(公告)号：US20170162912A1

公开(公告)日：2017-06-08

申请号：US15039261

申请日：2014-11-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yukiyoshi UENO ,  Tomoyuki MIZUNO ,  Kunimitsu YAMAMOTO ,  Junko OHIRA ,  Kaoru INOUE ,  Hideaki FUJITA ,  Hideki SANO

IPC: H01M10/0587 ,  H01M10/04 ,  H01M4/587 ,  H01M4/70 ,  H01M4/1393 ,  H01M4/525 ,  H01M4/62 ,  H01M4/66 ,  H01M4/505 ,  H01M4/133

Abstract: A lithium-ion secondary battery (100) includes a wound electrode body (80), a nonaqueous electrolyte, and a box-shaped case (50). The wound electrode body includes a positive electrode (10), a negative electrode (20), and a separator (40). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion (22) provided in a winding-direction starting end portion (81) of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case. The starting-end-side negative electrode remainder portion is positioned in a region where the surplus nonaqueous electrolyte exists, when the lithium-ion secondary battery is disposed in a predetermined posture.

公开(公告)号：US20220209372A1

公开(公告)日：2022-06-30

申请号：US17554304

申请日：2021-12-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO

IPC: H01M50/526 ,  H01M50/522 ,  H01M50/524

Abstract: To provide a battery module with high volumetric efficiency. A battery module comprising stacked and connected unit cells each comprising a power generation element, a cathode terminal, and an anode terminal disposed on the opposite side of the cathode terminal of the power generation element, wherein a connection laminate layer including a resin layer, a metal layer and a resin layer in this sequence, is disposed between the unit cells, and wherein the metal layer of the connection laminate layer is electrically connected to the cathode terminal of one adjacent unit cell and the anode terminal of the other unit cell.

公开(公告)号：US20220021047A1

公开(公告)日：2022-01-20

申请号：US17354697

申请日：2021-06-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kensaku MIYAZAWA ,  Masaki KATO ,  Akira KIYAMA ,  Sho ANDO ,  Kunimitsu YAMAMOTO ,  Koshiro YONEDA

IPC: H01M10/6551 ,  H01M10/613 ,  H01M10/647 ,  H01M4/485 ,  H01M4/58

Abstract: A cell that is a non-aqueous electrolyte secondary battery includes an electrode body in which a sheet-shaped positive electrode and a sheet-shaped negative electrode are stacked via a separator, and a battery case that accommodates the electrode body and an electrolytic solution. The electrode body includes a predetermined number of outer layers including an outermost layer made up of the separator and the negative electrode disposed on an outermost side of the electrode body, and an inner layer disposed on an inner side than the outer layer. The outer layer includes a negative electrode mixture layer configured to suppress heat generation of the electrode body caused by a short circuit of the electrode body as a heat generation suppressing member. The inner layer does not include the heat generation suppressing member.

公开(公告)号：US20150244032A1

公开(公告)日：2015-08-27

申请号：US14627286

申请日：2015-02-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO ,  Yukiyoshi UENO ,  Tomoyuki MIZUNO ,  Junko OHIRA

IPC: H01M10/44 ,  H01M10/052 ,  H01M10/058

CPC classification number: H01M10/446 ,  H01M10/0525 ,  H01M10/058 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y10T29/49108

Abstract: A manufacturing method according to the present invention is a method for manufacturing a nonaqueous electrolyte secondary battery including graphite as a negative-electrode active material. The manufacturing method includes: a step of assembling the battery including a positive electrode and a negative electrode; and a step of performing an initial charging process of performing first charging on the battery. In the initial charging process, charging is performed at a relatively large first current value when a gas generation amount caused in the battery during the charging does not depend on a charging current value, and the charging is performed at a second current value smaller than the first current value when the gas generation amount depends on the charging current value.

Abstract translation: 根据本发明的制造方法是制造包括石墨作为负极活性物质的非水电解质二次电池的方法。 制造方法包括：组装包括正极和负极的电池的步骤; 以及对电池执行第一次充电的初始充电处理的步骤。 在初始充电过程中，当充电期间在电池中产生的气体产生量不依赖于充电电流值时，以相对大的第一电流值进行充电，并且以小于充电电流值的第二电流值进行充电 当气体产生量取决于充电电流值时的第一电流值。

公开(公告)号：US20250132424A1

公开(公告)日：2025-04-24

申请号：US18813297

申请日：2024-08-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO

IPC: H01M50/105 ,  H01M10/0562 ,  H01M50/571

Abstract: The present disclosure provides a laminate battery having a reduced risk of the positive electrode current collector terminal corroding completely before the battery is fully discharged, and with which contact between salt water and charged electrode laminate can be suppressed. The laminate battery 1 of the present disclosure comprises an electrode laminate 10, a negative electrode current collector terminal 20, a positive electrode current collector terminal 30, and a laminate film 40. The positive electrode current collector terminal is formed of a metal which can be electrolytically corroded by a discharge potential of the electrode laminate, and (i) a volume of the positive electrode current collector terminal is greater than a volume which can be electrolytically corroded by a capacitance of the electrode laminate, and/or (ii) the positive electrode current collector terminal has a structure in which a cross-sectional area increases toward an end.

公开(公告)号：US20240234968A1

公开(公告)日：2024-07-11

申请号：US18616698

申请日：2024-03-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO

IPC: H01M50/526 ,  H01M50/522 ,  H01M50/524

CPC classification number: H01M50/526 ,  H01M50/522 ,  H01M50/524

Abstract: To provide a battery module with high volumetric efficiency. A battery module comprising stacked and connected unit cells each comprising a power generation element, a cathode terminal, and an anode terminal disposed on the opposite side of the cathode terminal of the power generation element, wherein a connection laminate layer including a resin layer, a metal layer and a resin layer in this sequence, is disposed between the unit cells, and wherein the metal layer of the connection laminate layer is electrically connected to the cathode terminal of one adjacent unit cell and the anode terminal of the other unit cell.

公开(公告)号：US20190198883A1

公开(公告)日：2019-06-27

申请号：US16197998

申请日：2018-11-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kunimitsu YAMAMOTO ,  Tsuyoshi SASAKI ,  Chikaaki OKUDA

IPC: H01M4/78 ,  H01M10/0583 ,  H01M10/0525 ,  H01M4/136

CPC classification number: H01M4/78 ,  H01M4/0404 ,  H01M4/0416 ,  H01M4/131 ,  H01M4/133 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/808 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/0583 ,  H01M2004/025 ,  H01M2220/20

Abstract: A rechargeable battery includes at least a porous base, a first electrode layer, an ionic conductor layer, and a second electrode layer. The porous base includes a conductive framework. The framework has a three-dimensional network structure. On at least part of a surface of the framework in the interior of the porous base, the first electrode layer, the ionic conductor layer, and the second electrode layer are stacked in this order. The first electrode layer and the second electrode layer have opposite polarities.