公开(公告)号：US20250118878A1

公开(公告)日：2025-04-10

申请号：US18810621

申请日：2024-08-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusuke IKEDA ,  Kenichi KAKISHITA ,  Tomofumi HIRUKAWA ,  Masashi UEDA ,  Shinji KOJIMA ,  Masataka OGUSHI ,  Kosuke YONEKAWA

IPC: H01M50/595 ,  H01M50/249

Abstract: A cell stack assembly, including: a plurality of stacked battery cells, each including an electrode assembly; a laminate exterior packaging that covers the electrode assembly and encloses the electrode assembly internally; and a fixing tape, including at least one of an inner fixing tape wound in a peripheral direction onto an outer peripheral face of the electrode assembly at an inner side of the laminate exterior packaging, or an outer fixing tape wound in a peripheral direction onto an outer peripheral face of the laminate exterior packaging, wherein: taking a direction in which the plurality of battery cells are stacked as a stacking direction, the fixing tape is wound such that winding positions of the fixing tape do not overlap in the stacking direction for at least one adjacent pair of the battery cells.

公开(公告)号：US20250070129A1

公开(公告)日：2025-02-27

申请号：US18606477

申请日：2024-03-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi UEDA ,  Shinji KOJIMA ,  Tomoko HIGO ,  Nariaki MIKI

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/587 ,  H01M4/62 ,  H01M4/02

Abstract: An anode active material layer for a battery, wherein the anode active material layer includes a carbon-based anode active material and a binder coating the carbon-based anode active material, and the content of the binder is 4.0 to 9.0% by mass, and a coverage of the anode active material by the binder is 8.0 to 25%, an anode active material layer for a battery. A production method of an anode active material layer comprises: blending the carbon-based anode active material, and the 4.0% to 9.0% by mass of the binder with respect to the total amount of the anode active material layer, to prepare an anode composite material; and coating the anode composite material onto a substrate by a dry method to form the anode active material layer.

公开(公告)号：US20250055081A1

公开(公告)日：2025-02-13

申请号：US18660707

申请日：2024-05-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kenichi KAKISHITA ,  Yusuke IKEDA ,  Tomofumi HIRUKAWA ,  Masashi UEDA ,  Shinji KOJIMA ,  Masataka OGUSHI ,  Kosuke YONEKAWA

IPC: H01M50/105

Abstract: A laminated battery, a battery element, and a laminate film enclosing the battery element, wherein the laminate film has a fused portion in which end portions are overlapped and an inner surface is fused, and the laminate film has a fused portion side surface in which a fused portion is formed, an opposite side surface opposed to the fused portion side surface, and a pair of main surfaces orthogonal to the fused portion side surface and the opposite side surface and having an area larger than the fused portion side surface and the opposite side surface, and the laminate film has an uneven shape on at least one of the fused portion side surface and the opposite side surface.

公开(公告)号：US20250054985A1

公开(公告)日：2025-02-13

申请号：US18645580

申请日：2024-04-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi UEDA ,  Shinji KOJIMA ,  Tomoko HIGO

IPC: H01M4/62 ,  H01M4/04

Abstract: A method for manufacturing an electrode includes the steps of: kneading active material particles, an electrically conductive material, and an adhesive to fix the electrically conductive material to at least part of a surface of the active material particles; mixing the active material particles having the electrically conductive material fixed to the active material particles by the adhesive with polytetrafluoroethylene to obtain a mixture; and causing the polytetrafluoroethylene in the mixture to fibrillate.

公开(公告)号：US20250054938A1

公开(公告)日：2025-02-13

申请号：US18636594

申请日：2024-04-16

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi UEDA ,  Shinji KOJIMA ,  Tomoko HIGO

IPC: H01M4/04 ,  H01M4/13 ,  H01M4/139 ,  H01M4/36 ,  H01M4/62

Abstract: A method of fabricating an electrode includes: fabricating a first electrode layer disposed on a current collector; and fabricating a second electrode layer disposed on the first electrode layer. The first electrode layer is formed by electrostatic deposition, wet deposition, or rolled film formation. The second electrode layer is formed by rolled film formation. When the first electrode layer is fabricated by rolled film formation, at least part of a surface of active material particles used in the rolled film formation is coated with a resin that is different from polytetrafluoroethylene.

公开(公告)号：US20250125402A1

公开(公告)日：2025-04-17

申请号：US18822299

申请日：2024-09-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusuke IKEDA ,  Kenichi KAKISHITA ,  Tomofumi HIRUKAWA ,  Masashi UEDA ,  Shinji KOJIMA ,  Masataka OGUSHI ,  Kosuke YONEKAWA

IPC: H01M10/04 ,  H01M50/103 ,  H01M50/176 ,  H01M50/557

Abstract: A method of manufacturing a laminate-type battery is disclosed. The battery includes an electrode body, a side member disposed at a side face of the electrode body, and a laminate film covering the electrode body and a part of the side member, the side member being disposed at a position that is offset to a first side in a longitudinal direction of the side face relative to a center of the side face in the longitudinal direction. The method includes welding the laminate film so as to cover the electrode body and a part of the side member. The side member is shaped such that a thickness of the side member in a transverse direction of the side face increases continuously towards the first side.

公开(公告)号：US20240250245A1

公开(公告)日：2024-07-25

申请号：US18443442

申请日：2024-02-16

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryosuke OHSAWA ,  Masashi UEDA ,  Takuo YANAGI ,  Sokichi OKUBO

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/028

Abstract: In this disclosure, a battery is provided. The electrode includes an electrode current collector and an electrode active material layer, wherein the electrode active material layer includes a single crystal electrode active material and a polycrystalline electrode active material, and the single crystal electrode active material and the polycrystalline electrode active material are each a lithium transition metal composite oxide, and the electrode active material layer includes a first layer including a first surface opposite to the electrode current collector and a second layer including a second surface on the electrode current collector side, wherein the first layer includes the single crystal electrode active material as a main component of the electrode active material, and the second layer includes the polycrystalline electrode active material as a main component of the electrode active material.

公开(公告)号：US20240079562A1

公开(公告)日：2024-03-07

申请号：US18237010

申请日：2023-08-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi UEDA ,  Takuo Yanagi ,  Shinji Kojima ,  Sokichi Okubo

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/0416 ,  H01M4/623 ,  H01M10/0525

Abstract: A main object of the present disclosure is to provide an electrode capable of reducing the resistance of a battery and also capable of improving resistance to high temperature storage. The present disclosure achieves the object by providing an electrode to be used for a battery, the electrode including a current collector and an electrode layer, wherein the electrode layer includes layers in the order of a first layer and a second layer; the first layer contains a first binder, the second layer contains a second binder, and a degree of swelling of the first binder is lower than a degree of swelling of the second binder.

公开(公告)号：US20250167351A1

公开(公告)日：2025-05-22

申请号：US18935682

申请日：2024-11-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusuke IKEDA ,  Kenichi KAKISHITA ,  Tomofumi HIRUKAWA ,  Masashi UEDA ,  Shinji KOJIMA ,  Masataka OGUSHI ,  Kosuke YONEKAWA

IPC: H01M50/112 ,  B60L50/64 ,  H01M50/147 ,  H01M50/15 ,  H01M50/164

Abstract: A laminated battery includes an electrode stack including a plurality of electrodes stacked together and having a cuboid shape, and a laminate film covering and sealing the electrodes. The laminate film includes a film body covering four surfaces of the electrode stack, a film partitioning wall interposed between two adjacent electrodes of the plurality of electrodes, and cover members that are twice as many as the electrodes. The film body and the film partitioning wall define accommodating portions respectively accommodating the electrodes. The cover members cover two remaining uncovered sides of each accommodating portion. The cover members each have a recess-shaped portion including a bottom wall and four side walls. An outer surface or an inner surface of the bottom wall faces a side surface of a corresponding one of the electrodes. Outer surfaces of the side walls are fusion-bonded to the film body or the film partitioning wall.

公开(公告)号：US20250158251A1

公开(公告)日：2025-05-15

申请号：US18812261

申请日：2024-08-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusuke IKEDA ,  Kenichi KAKISHITA ,  Tomofumi HIRUKAWA ,  Masashi UEDA ,  Shinji KOJIMA ,  Masataka OGUSHI ,  Kosuke YONEKAWA

IPC: H01M50/548 ,  H01M50/249

Abstract: A laminate type battery includes: an electrode body; a side-surface member disposed on a side surface of the electrode body; and a laminate film that covers the electrode body and a part of the side-surface member, in which: the side-surface member is disposed at a position deviated from a center of the side surface to one side in a longitudinal direction of the side surface; and in the side-surface member, the volume of the side-surface member positioned on a deviation side on the side surface is equal to the volume of the side-surface member positioned on a non-deviation side on the side surface, the deviation side being the one side to which the side-surface member is positioned so as to be deviated from the center in the longitudinal direction of the side surface, the non-deviation side being the other side in the longitudinal direction of the side surface.